15 files changed, 765 insertions, 504 deletions

diff --git a/src/vk/graphics_pipeline_2d.cpp b/src/vk/graphics_pipeline_2d.cpp
index 61cfe3f..08bdb6e 100644
--- a/src/vk/graphics_pipeline_2d.cpp
+++ b/src/vk/graphics_pipeline_2d.cpp
@@ -25,123 +25,6 @@ namespace
 {
 
 void
-load_projection_uniform_buffer(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  try
-  {
-    self->ub_projection.reserve(cg_core.vk_swapchain->images_count);
-    for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
-      self->ub_projection.emplace_back(
-	cg_core.vk_device_with_swapchain, sizeof(VK::UBOProjection));
-  }
-  catch(const std::exception& e)
-  {
-    throw CommandError{e.what()};
-  }
-}
-
-void
-unload_projection_uniform_buffer(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  self->ub_projection.clear();
-}
-
-void
-load_descriptor_pool(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  VkDescriptorPoolSize descriptor_pool_size{};
-  descriptor_pool_size.type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
-  descriptor_pool_size.descriptorCount = self->ub_projection.size();
-
-  VkDescriptorPoolCreateInfo pool_info{};
-  pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
-  pool_info.pNext = nullptr;
-  pool_info.flags = 0;
-  pool_info.maxSets = self->ub_projection.size();
-  pool_info.poolSizeCount = 1;
-  pool_info.pPoolSizes = &descriptor_pool_size;
-
-  if(vkCreateDescriptorPool(
-       cg_core.vk_device_with_swapchain->device, &pool_info, nullptr,
-       &self->descriptor_pool) != VK_SUCCESS)
-    throw CommandError{"Failed to create a Vulkan descriptor pool."};
-}
-
-void
-unload_descriptor_pool(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  vkDestroyDescriptorPool(
-    cg_core.vk_device_with_swapchain->device, self->descriptor_pool,
-    nullptr);
-}
-
-void
-load_projection_descriptor_sets(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  std::vector<VkDescriptorSetLayout> layouts(
-    self->ub_projection.size(),
-    cg_core.vk_graphics_pipeline_2d_layout->descriptor_set_projection);
-
-  VkDescriptorSetAllocateInfo alloc_info{};
-  alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
-  alloc_info.descriptorPool = self->descriptor_pool;
-  alloc_info.descriptorSetCount = layouts.size();
-  alloc_info.pSetLayouts = layouts.data();
-
-  self->projection_descriptor_sets.resize(layouts.size());
-  if(vkAllocateDescriptorSets(
-       cg_core.vk_device_with_swapchain->device, &alloc_info,
-       self->projection_descriptor_sets.data()) != VK_SUCCESS)
-    throw CommandError{"Failed to create Vulkan projection descriptor sets."};
-}
-
-void
-load_resources_to_descriptor_sets(void *obj)
-{
-  auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
-
-  for(auto i{0}; i < self->ub_projection.size(); i++)
-  {
-    VkDescriptorBufferInfo projection_info{};
-    projection_info.buffer = self->ub_projection[i].buffer;
-    projection_info.offset = 0;
-    projection_info.range = sizeof(VK::UBOProjection);
-
-    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
-    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
-    write_descriptors[0].dstSet = self->projection_descriptor_sets[i];
-    write_descriptors[0].dstBinding = 0;
-    write_descriptors[0].dstArrayElement = 0;
-    write_descriptors[0].descriptorCount = 1;
-    write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
-    write_descriptors[0].pBufferInfo = &projection_info;
-    write_descriptors[0].pImageInfo = nullptr;
-    write_descriptors[0].pTexelBufferView = nullptr;
-
-    vkUpdateDescriptorSets(
-      cg_core.vk_device_with_swapchain->device, write_descriptors.size(),
-      write_descriptors.data(), 0, nullptr);
-
-    VK::UBOProjection ubo_projection;
-    ubo_projection.proj = glm::ortho(
-      0.0f, static_cast<float>(cg_core.game_width),
-      0.0f, static_cast<float>(cg_core.game_height),
-      0.0f, 100.0f);
-    self->ub_projection[i].copy_data(&ubo_projection);
-  }
-}
-
-void
 load_framebuffer(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2D*>(obj);
@@ -245,10 +128,10 @@ load_pipeline(void *obj)
   input_assembly.primitiveRestartEnable = VK_FALSE;
 
   VkViewport viewport = {};
-  viewport.x = 0.0f;
-  viewport.y = 0.0f;
-  viewport.width = static_cast<float>(cg_core.screen_width);
-  viewport.height = static_cast<float>(cg_core.screen_height);
+  viewport.x = 0;
+  viewport.y = 0;
+  viewport.width = cg_core.screen_width;
+  viewport.height = cg_core.screen_height;
   viewport.minDepth = 0.0f;
   viewport.maxDepth = 1.0f;
 
@@ -368,11 +251,6 @@ unload_pipeline(void *obj)
 }
 
 const CommandChain loader{
-  {&load_projection_uniform_buffer, &unload_projection_uniform_buffer},
-  {&load_descriptor_pool, &unload_descriptor_pool},
-  // By destroying the pool the sets are also destroyed.
-  {&load_projection_descriptor_sets, nullptr},
-  {&load_resources_to_descriptor_sets, nullptr},
   {&load_framebuffer, &unload_framebuffer},
   {&load_pipeline, &unload_pipeline}
 };
@@ -382,8 +260,7 @@ const CommandChain loader{
 namespace VK
 {
 
-GraphicsPipeline2D::GraphicsPipeline2D():
-  sprites_to_draw{cg_core.vk_swapchain->images_count}
+GraphicsPipeline2D::GraphicsPipeline2D()
 {
   loader.execute(this);
 }
@@ -395,74 +272,61 @@ GraphicsPipeline2D::~GraphicsPipeline2D()
 
 void
 GraphicsPipeline2D::draw(
-  const VkCommandBuffer draw_command_buffer, const size_t current_frame,
-  const size_t next_frame, const uint32_t image_index)
+  std::shared_ptr<View> view, const VkCommandBuffer draw_command_buffer,
+  const size_t current_frame, const size_t next_frame,
+  const uint32_t image_index)
 {
-  // Load command
+  // Set viewport
   {
-    VkRenderPassBeginInfo render_pass_begin{};
-    render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
-    render_pass_begin.pNext = nullptr;
-    render_pass_begin.renderPass =
-      cg_core.vk_graphics_pipeline_2d_layout->render_pass;
-    render_pass_begin.framebuffer = this->swapchain_framebuffers[image_index];
-    render_pass_begin.renderArea.offset = {0, 0};
-    render_pass_begin.renderArea.extent = {
-      cg_core.screen_width, cg_core.screen_height};
-    render_pass_begin.clearValueCount = 0;
-    render_pass_begin.pClearValues = nullptr;
-
-    vkCmdBeginRenderPass(
-      draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
-
     VkViewport vk_viewport{};
-    vk_viewport.width = static_cast<float>(cg_core.screen_width);
-    vk_viewport.height = static_cast<float>(cg_core.screen_height);
+    vk_viewport.x = view->region.x;
+    vk_viewport.y = view->region.y;
+    vk_viewport.width = view->region.z;
+    vk_viewport.height = view->region.w;
     vk_viewport.minDepth = 0.0f;
     vk_viewport.maxDepth = 1.0f;
     vkCmdSetViewport(draw_command_buffer, 0, 1, &vk_viewport);
 
     VkRect2D vk_scissor{};
-    vk_scissor.extent.width = cg_core.screen_width;
-    vk_scissor.extent.height = cg_core.screen_height;
-    vk_scissor.offset.x = 0;
-    vk_scissor.offset.y = 0;
+    vk_scissor.offset.x = static_cast<int32_t>(view->region.x);
+    vk_scissor.offset.y = static_cast<int32_t>(view->region.y);
+    vk_scissor.extent.width = static_cast<uint32_t>(view->region.z);
+    vk_scissor.extent.height = static_cast<uint32_t>(view->region.w);
     vkCmdSetScissor(draw_command_buffer, 0, 1, &vk_scissor);
+  }
 
-    // Draw sprites
-    for(auto& [sprite, positions]: this->sprites_to_draw[current_frame])
+  // Draw sprites
+  for(auto& [sprite, positions]: view->sprites_to_draw[current_frame])
+  {
+    // Commands
     {
-      // Commands
-      {
-	std::array<VkDescriptorSet, 2> vk_descriptor_sets{
-	  this->projection_descriptor_sets[image_index],
-	  sprite->descriptor_sets[image_index]};
-	VkDeviceSize offsets[]{0};
-
-	vkCmdBindDescriptorSets(
-	  draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
-	  cg_core.vk_graphics_pipeline_2d_layout->pipeline, 0,
-	  vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
-	vkCmdBindPipeline(
-	  draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
-	  this->graphic_pipeline);
-	vkCmdBindVertexBuffers(
-	  draw_command_buffer, 0, 1, &sprite->vertex_buffer->buffer, offsets);
-	vkCmdDraw(
-	  draw_command_buffer, Sprite::vertex_count, positions.size(), 0, 0);
-      }
-
-      VK::UBOSpritePositions ubo_sprite_positions;
-      for(auto i{0}; i < positions.size(); i++)
-	ubo_sprite_positions.positions[i] = positions[i];
-      sprite->ub_sprite_positions[image_index].copy_data(
-	&ubo_sprite_positions);
+      std::array<VkDescriptorSet, 2> vk_descriptor_sets{
+	view->descriptor_sets_2d[image_index],
+	sprite->descriptor_sets[image_index]};
+      VkDeviceSize offsets[]{0};
+
+      vkCmdBindDescriptorSets(
+	draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+	cg_core.vk_graphics_pipeline_2d_layout->pipeline, 0,
+	vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
+      vkCmdBindPipeline(
+	draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+	this->graphic_pipeline);
+      vkCmdBindVertexBuffers(
+	draw_command_buffer, 0, 1, &sprite->vertex_buffer->buffer, offsets);
+      vkCmdDraw(
+	draw_command_buffer, Sprite::vertex_count, positions.size(), 0, 0);
     }
+
+    VK::UBOSpritePositions ubo_sprite_positions;
+    for(auto i{0}; i < positions.size(); i++)
+      ubo_sprite_positions.positions[i] = positions[i];
+    sprite->ub_sprite_positions[image_index].copy_data(
+      &ubo_sprite_positions);
   }
-  vkCmdEndRenderPass(draw_command_buffer);
 
   // Prepare for the next frame.
-  this->sprites_to_draw[next_frame].clear();
+  view->sprites_to_draw[next_frame].clear();
 }
 
 }
diff --git a/src/vk/graphics_pipeline_2d.hpp b/src/vk/graphics_pipeline_2d.hpp
index 193c06d..dd4bb29 100644
--- a/src/vk/graphics_pipeline_2d.hpp
+++ b/src/vk/graphics_pipeline_2d.hpp
@@ -17,36 +17,30 @@
 #ifndef CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_H
 #define CANDY_GEAR_VK_GRAPHICS_PIPELINE_2D_H 1
 
+#include <memory>
+#include <unordered_map>
 #include <vector>
 
 #include "core.hpp"
 #include "sprite.hpp"
+#include "view.hpp"
 
 namespace VK
 {
 
 struct GraphicsPipeline2D
 {
-  // FIXME: if this vector get resized, it will cause a segmentation fault!
-  std::vector<UniformBuffer> ub_projection;
-
-  VkDescriptorPool descriptor_pool;
-  std::vector<VkDescriptorSet> projection_descriptor_sets;
-
   VkRenderPass render_pass;
   std::vector<VkFramebuffer> swapchain_framebuffers;
   VkPipeline graphic_pipeline;
 
-  std::vector<
-    std::unordered_map<std::shared_ptr<Sprite>, std::vector<glm::vec4>>>
-  sprites_to_draw;
-
   GraphicsPipeline2D();
   ~GraphicsPipeline2D();
 
   void
-  draw(const VkCommandBuffer draw_command_buffer, const size_t current_frame,
-       const size_t next_frame, const uint32_t image_index);
+  draw(std::shared_ptr<View> view, const VkCommandBuffer draw_command_buffer,
+       const size_t current_frame, const size_t next_frame,
+       const uint32_t image_index);
 };
 
 }
diff --git a/src/vk/graphics_pipeline_2d_layout.cpp b/src/vk/graphics_pipeline_2d_layout.cpp
index f8822b9..6840f2c 100644
--- a/src/vk/graphics_pipeline_2d_layout.cpp
+++ b/src/vk/graphics_pipeline_2d_layout.cpp
@@ -24,7 +24,7 @@ namespace
 {
 
 void
-load_descriptor_set_layout_projection(void *obj)
+load_descriptor_set_view(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
@@ -45,23 +45,23 @@ load_descriptor_set_layout_projection(void *obj)
 
   if(vkCreateDescriptorSetLayout(
        cg_core.vk_device_with_swapchain->device, &layout_info, nullptr,
-       &self->descriptor_set_projection) != VK_SUCCESS)
+       &self->descriptor_set_view) != VK_SUCCESS)
     throw CommandError{
       "Failed to create Vulkan descriptor set layout for projection."};
 }
 
 void
-unload_descriptor_set_layout_projection(void *obj)
+unload_descriptor_set_view(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
   vkDestroyDescriptorSetLayout(
-    cg_core.vk_device_with_swapchain->device, self->descriptor_set_projection,
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_view,
     nullptr);
 }
 
 void
-load_descriptor_set_layout_sprite(void *obj)
+load_descriptor_set_sprite(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
@@ -95,22 +95,22 @@ load_descriptor_set_layout_sprite(void *obj)
 }
 
 void
-unload_descriptor_set_layout_sprite(void *obj)
+unload_descriptor_set_sprite(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
   vkDestroyDescriptorSetLayout(
-    cg_core.vk_device_with_swapchain->device,
-    self->descriptor_set_sprite, nullptr);
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_sprite,
+    nullptr);
 }
 
 void
-load_pipeline_layout(void *obj)
+load_pipeline(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
   std::array<VkDescriptorSetLayout, 2> set_layouts{
-    self->descriptor_set_projection, self->descriptor_set_sprite
+    self->descriptor_set_view, self->descriptor_set_sprite
   };
 
   VkPipelineLayoutCreateInfo pipeline_layout_info{};
@@ -127,7 +127,7 @@ load_pipeline_layout(void *obj)
 }
 
 void
-unload_pipeline_layout(void *obj)
+unload_pipeline(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline2DLayout*>(obj);
 
@@ -207,10 +207,9 @@ unload_render_pass(void *obj)
 }
 
 const CommandChain loader{
-  {&load_descriptor_set_layout_projection,
-   &unload_descriptor_set_layout_projection},
-  {&load_descriptor_set_layout_sprite, &unload_descriptor_set_layout_sprite},
-  {&load_pipeline_layout, &unload_pipeline_layout},
+  {&load_descriptor_set_view, &unload_descriptor_set_view},
+  {&load_descriptor_set_sprite, &unload_descriptor_set_sprite},
+  {&load_pipeline, &unload_pipeline},
   {&load_render_pass, &unload_render_pass}
 };
 
diff --git a/src/vk/graphics_pipeline_2d_layout.hpp b/src/vk/graphics_pipeline_2d_layout.hpp
index 520bbc1..1e0a794 100644
--- a/src/vk/graphics_pipeline_2d_layout.hpp
+++ b/src/vk/graphics_pipeline_2d_layout.hpp
@@ -22,9 +22,19 @@
 namespace VK
 {
 
+struct UBOView2D
+{
+  glm::mat4 proj;
+};
+
+struct UBOSpritePositions
+{
+  glm::vec4 positions[128];
+};
+
 struct GraphicsPipeline2DLayout
 {
-  VkDescriptorSetLayout descriptor_set_projection;
+  VkDescriptorSetLayout descriptor_set_view;
   VkDescriptorSetLayout descriptor_set_sprite;
   VkPipelineLayout pipeline;
   VkRenderPass render_pass;
diff --git a/src/vk/graphics_pipeline_3d.cpp b/src/vk/graphics_pipeline_3d.cpp
index 31e9365..02fbfd9 100644
--- a/src/vk/graphics_pipeline_3d.cpp
+++ b/src/vk/graphics_pipeline_3d.cpp
@@ -28,16 +28,16 @@ namespace
 {
 
 void
-load_view_projection_uniform_buffer(void *obj)
+load_world_vert_uniform_buffer(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
   try
   {
-    self->ub_view_projection.reserve(cg_core.vk_swapchain->images_count);
+    self->ub_world_vert.reserve(cg_core.vk_swapchain->images_count);
     for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
-      self->ub_view_projection.emplace_back(
-	cg_core.vk_device_with_swapchain, sizeof(VK::UBOViewProjection));
+      self->ub_world_vert.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(VK::UBOWorld3D_Vert));
   }
   catch(const std::exception& e)
   {
@@ -46,24 +46,24 @@ load_view_projection_uniform_buffer(void *obj)
 }
 
 void
-unload_view_projection_uniform_buffer(void *obj)
+unload_world_vert_uniform_buffer(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
-  self->ub_view_projection.clear();
+  self->ub_world_vert.clear();
 }
 
 void
-load_directional_light_uniform_buffer(void *obj)
+load_world_frag_uniform_buffer(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
   try
   {
-    self->ub_view_projection.reserve(cg_core.vk_swapchain->images_count);
+    self->ub_world_frag.reserve(cg_core.vk_swapchain->images_count);
     for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
-      self->ub_directional_light.emplace_back(
-	cg_core.vk_device_with_swapchain, sizeof(VK::UBODirectionalLight));
+      self->ub_world_frag.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(VK::UBOWorld3D_Frag));
   }
   catch(const std::exception& e)
   {
@@ -72,11 +72,11 @@ load_directional_light_uniform_buffer(void *obj)
 }
 
 void
-unload_directional_light_uniform_buffer(void *obj)
+unload_world_frag_uniform_buffer(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
-  self->ub_directional_light.clear();
+  self->ub_world_frag.clear();
 }
 
 void
@@ -84,17 +84,18 @@ load_descriptor_pool(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
+  uint32_t uniform_buffers_count =
+    self->ub_world_vert.size() + self->ub_world_vert.size();
+
   VkDescriptorPoolSize descriptor_pool_size{};
   descriptor_pool_size.type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
-  descriptor_pool_size.descriptorCount =
-    self->ub_view_projection.size() + self->ub_directional_light.size();
+  descriptor_pool_size.descriptorCount = uniform_buffers_count;
 
   VkDescriptorPoolCreateInfo pool_info{};
   pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
   pool_info.pNext = nullptr;
   pool_info.flags = 0;
-  pool_info.maxSets = self->ub_view_projection.size() +
-    self->ub_directional_light.size();
+  pool_info.maxSets = uniform_buffers_count;
   pool_info.poolSizeCount = 1;
   pool_info.pPoolSizes = &descriptor_pool_size;
 
@@ -115,26 +116,25 @@ unload_descriptor_pool(void *obj)
 }
 
 void
-load_world_view_descriptor_sets(void *obj)
+load_descriptor_sets_world(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
   std::vector<VkDescriptorSetLayout> layouts(
     cg_core.vk_swapchain->images_count,
-    cg_core.vk_graphics_pipeline_3d_layout->descriptor_set_world_view);
+    cg_core.vk_graphics_pipeline_3d_layout->descriptor_set_world);
 
   VkDescriptorSetAllocateInfo alloc_info{};
   alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
   alloc_info.descriptorPool = self->descriptor_pool;
-  alloc_info.descriptorSetCount = self->ub_view_projection.size();
+  alloc_info.descriptorSetCount = layouts.size();
   alloc_info.pSetLayouts = layouts.data();
 
-  self->world_view_descriptor_sets.resize(
-    cg_core.vk_swapchain->images_count);
+  self->descriptor_sets_world.resize(layouts.size());
   if(vkAllocateDescriptorSets(
        cg_core.vk_device_with_swapchain->device, &alloc_info,
-       self->world_view_descriptor_sets.data()) != VK_SUCCESS)
-    throw CommandError{"Failed to create Vulkan world view descriptor set."};
+       self->descriptor_sets_world.data()) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan world descriptor set."};
 }
 
 void
@@ -142,36 +142,36 @@ load_resources_to_descriptor_sets(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3D*>(obj);
 
-  for(auto i{0}; i < self->ub_view_projection.size(); i++)
+  for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
   {
-    VkDescriptorBufferInfo view_projection_info{};
-    view_projection_info.buffer = self->ub_view_projection[i].buffer;
-    view_projection_info.offset = 0;
-    view_projection_info.range = sizeof(VK::UBOViewProjection);
+    VkDescriptorBufferInfo world_vert_info{};
+    world_vert_info.buffer = self->ub_world_vert[i].buffer;
+    world_vert_info.offset = 0;
+    world_vert_info.range = sizeof(VK::UBOWorld3D_Vert);
 
-    VkDescriptorBufferInfo directional_light_info{};
-    directional_light_info.buffer = self->ub_directional_light[i].buffer;
-    directional_light_info.offset = 0;
-    directional_light_info.range = sizeof(VK::UBODirectionalLight);
+    VkDescriptorBufferInfo world_frag_info{};
+    world_frag_info.buffer = self->ub_world_frag[i].buffer;
+    world_frag_info.offset = 0;
+    world_frag_info.range = sizeof(VK::UBOWorld3D_Frag);
 
     std::array<VkWriteDescriptorSet, 2> write_descriptors{};
     write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
-    write_descriptors[0].dstSet = self->world_view_descriptor_sets[i];
+    write_descriptors[0].dstSet = self->descriptor_sets_world[i];
     write_descriptors[0].dstBinding = 0;
     write_descriptors[0].dstArrayElement = 0;
     write_descriptors[0].descriptorCount = 1;
     write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
-    write_descriptors[0].pBufferInfo = &view_projection_info;
+    write_descriptors[0].pBufferInfo = &world_vert_info;
     write_descriptors[0].pImageInfo = nullptr;
     write_descriptors[0].pTexelBufferView = nullptr;
 
     write_descriptors[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
-    write_descriptors[1].dstSet = self->world_view_descriptor_sets[i];
+    write_descriptors[1].dstSet = self->descriptor_sets_world[i];
     write_descriptors[1].dstBinding = 1;
     write_descriptors[1].dstArrayElement = 0;
     write_descriptors[1].descriptorCount = 1;
     write_descriptors[1].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
-    write_descriptors[1].pBufferInfo = &directional_light_info;
+    write_descriptors[1].pBufferInfo = &world_frag_info;
     write_descriptors[1].pImageInfo = nullptr;
     write_descriptors[1].pTexelBufferView = nullptr;
 
@@ -369,10 +369,10 @@ load_pipeline(void *obj)
   input_assembly.primitiveRestartEnable = VK_FALSE;
 
   VkViewport viewport = {};
-  viewport.x = 0.0f;
-  viewport.y = 0.0f;
-  viewport.width = static_cast<float>(cg_core.screen_width);
-  viewport.height = static_cast<float>(cg_core.screen_height);
+  viewport.x = 0;
+  viewport.y = 0;
+  viewport.width = cg_core.screen_width;
+  viewport.height = cg_core.screen_height;
   viewport.minDepth = 0.0f;
   viewport.maxDepth = 1.0f;
 
@@ -505,13 +505,11 @@ unload_pipeline(void *obj)
 }
 
 const CommandChain loader{
-  {&load_view_projection_uniform_buffer,
-   &unload_view_projection_uniform_buffer},
-  {&load_directional_light_uniform_buffer,
-   &unload_directional_light_uniform_buffer},
+  {&load_world_vert_uniform_buffer, &unload_world_vert_uniform_buffer},
+  {&load_world_frag_uniform_buffer, &unload_world_frag_uniform_buffer},
   {&load_descriptor_pool, &unload_descriptor_pool},
   // By destroying the pool the sets are also destroyed.
-  {&load_world_view_descriptor_sets, nullptr},
+  {&load_descriptor_sets_world, nullptr},
   {&load_resources_to_descriptor_sets, nullptr},
   {&load_depth_image, &unload_depth_image},
   {&load_depth_image_view, &unload_depth_image_view},
@@ -524,10 +522,7 @@ const CommandChain loader{
 namespace VK
 {
 
-GraphicsPipeline3D::GraphicsPipeline3D():
-  camera_position{std::make_shared<glm::vec3>(0.0f, 0.0f, 0.0f)},
-  camera_rotation{std::make_shared<glm::vec3>(0.0f, 0.0f, 0.0f)},
-  models_to_draw{cg_core.vk_swapchain->images_count}
+GraphicsPipeline3D::GraphicsPipeline3D()
 {
   loader.execute(this);
 }
@@ -539,138 +534,116 @@ GraphicsPipeline3D::~GraphicsPipeline3D()
 
 void
 GraphicsPipeline3D::draw(
-  const VkCommandBuffer draw_command_buffer, const size_t current_frame,
-  const size_t next_frame, const uint32_t image_index)
+  std::shared_ptr<View> view, const VkCommandBuffer draw_command_buffer,
+  const size_t current_frame, const uint32_t image_index)
 {
-  // Load command.
+  // Set viewport
   {
-    // Dark gray blue.
-    std::array<VkClearValue, 2> clear_values{};
-    clear_values[0].color = {0.12f, 0.12f, 0.18f, 1.0f};
-    clear_values[1].depthStencil = {1.0f, 0};
-
-    VkRenderPassBeginInfo render_pass_begin{};
-    render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
-    render_pass_begin.pNext = nullptr;
-    render_pass_begin.renderPass =
-      cg_core.vk_graphics_pipeline_3d_layout->render_pass;
-    render_pass_begin.framebuffer = this->swapchain_framebuffers[image_index];
-    render_pass_begin.renderArea.offset = {0, 0};
-    render_pass_begin.renderArea.extent = {
-      cg_core.screen_width, cg_core.screen_height};
-    render_pass_begin.clearValueCount = clear_values.size();
-    render_pass_begin.pClearValues = clear_values.data();
-
-    vkCmdBeginRenderPass(
-      draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
-
     VkViewport vk_viewport{};
-    vk_viewport.width = static_cast<float>(cg_core.screen_width);
-    vk_viewport.height = static_cast<float>(cg_core.screen_height);
+    vk_viewport.x = view->region.x;
+    vk_viewport.y = view->region.y;
+    vk_viewport.width = view->region.z;
+    vk_viewport.height = view->region.w;
     vk_viewport.minDepth = 0.0f;
     vk_viewport.maxDepth = 1.0f;
     vkCmdSetViewport(draw_command_buffer, 0, 1, &vk_viewport);
 
     VkRect2D vk_scissor{};
-    vk_scissor.extent.width = cg_core.screen_width;
-    vk_scissor.extent.height = cg_core.screen_height;
-    vk_scissor.offset.x = 0;
-    vk_scissor.offset.y = 0;
+    vk_scissor.offset.x = static_cast<int32_t>(view->region.x);
+    vk_scissor.offset.y = static_cast<int32_t>(view->region.y);
+    vk_scissor.extent.width = static_cast<uint32_t>(view->region.z);
+    vk_scissor.extent.height = static_cast<uint32_t>(view->region.w);
     vkCmdSetScissor(draw_command_buffer, 0, 1, &vk_scissor);
+  }
 
-    // Draw models
-    for(auto& [model, instances] : this->models_to_draw[current_frame])
+  // Draw models
+  for(auto& [model, instances]:
+	cg_core.vk_renderer->models_to_draw[current_frame])
+  {
+    // Commands
     {
-      // Commands
-      {
-	std::array<VkDescriptorSet, 2> vk_descriptor_sets{
-	  this->world_view_descriptor_sets[image_index],
-	  model->descriptor_sets[image_index]};
-	VkBuffer vertex_buffers[]{model->vertex_buffer->buffer};
-	VkDeviceSize offsets[]{0};
-
-	vkCmdBindDescriptorSets(
-	  draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
-	  cg_core.vk_graphics_pipeline_3d_layout->pipeline, 0,
-	  vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
-	vkCmdBindPipeline(
-	  draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
-	  this->graphic_pipeline);
-	vkCmdBindVertexBuffers(
-	  draw_command_buffer, 0, 1, vertex_buffers, offsets);
-	vkCmdBindIndexBuffer(
-	  draw_command_buffer, model->index_buffer->buffer, 0,
-	  VK_INDEX_TYPE_UINT32);
-	vkCmdDrawIndexed(
-	  draw_command_buffer, model->index_count, instances.size(), 0, 0, 0);
-      }
-
-      VK::UBOModelInstance ubo_model_instance;
-
-      for(int i{0}; i < instances.size(); i++)
-      {
-	// Object matrix.
-	glm::mat4 instance_matrix{1.0f};
-	instance_matrix = glm::translate(
-	  instance_matrix, instances[i].position);
-	instance_matrix = glm::rotate(
-	  instance_matrix, instances[i].rotation.x, glm::vec3{1.0, 0.0, 0.0});
-	instance_matrix = glm::rotate(
-	  instance_matrix, instances[i].rotation.y, glm::vec3{0.0, 1.0, 0.0});
-	instance_matrix = glm::rotate(
-	  instance_matrix, instances[i].rotation.z, glm::vec3{0.0, 0.0, 1.0});
-
-	ubo_model_instance.instances[i] = instance_matrix;
-      }
-
-      model->ub_model_instance[image_index].copy_data(&ubo_model_instance);
+      std::array<VkDescriptorSet, 3> vk_descriptor_sets{
+	this->descriptor_sets_world[image_index],
+	view->descriptor_sets_3d[image_index],
+	model->descriptor_sets[image_index]};
+      VkBuffer vertex_buffers[]{model->vertex_buffer->buffer};
+      VkDeviceSize offsets[]{0};
+
+      vkCmdBindDescriptorSets(
+	draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+	cg_core.vk_graphics_pipeline_3d_layout->pipeline, 0,
+	vk_descriptor_sets.size(), vk_descriptor_sets.data(), 0, nullptr);
+      vkCmdBindPipeline(
+	draw_command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS,
+	this->graphic_pipeline);
+      vkCmdBindVertexBuffers(
+	draw_command_buffer, 0, 1, vertex_buffers, offsets);
+      vkCmdBindIndexBuffer(
+	draw_command_buffer, model->index_buffer->buffer, 0,
+	VK_INDEX_TYPE_UINT32);
+      vkCmdDrawIndexed(
+	draw_command_buffer, model->index_count, instances.size(), 0, 0, 0);
     }
-    vkCmdEndRenderPass(draw_command_buffer);
 
+    VK::UBOModelInstance ubo_model_instance;
+
+    for(int i{0}; i < instances.size(); i++)
+    {
+      // Object matrix.
+      glm::mat4 instance_matrix{1.0f};
+      instance_matrix = glm::translate(
+	instance_matrix, instances[i].position);
+      instance_matrix = glm::rotate(
+	instance_matrix, instances[i].rotation.x, glm::vec3{1.0, 0.0, 0.0});
+      instance_matrix = glm::rotate(
+	instance_matrix, instances[i].rotation.y, glm::vec3{0.0, 1.0, 0.0});
+      instance_matrix = glm::rotate(
+	instance_matrix, instances[i].rotation.z, glm::vec3{0.0, 0.0, 1.0});
+
+      ubo_model_instance.instances[i] = instance_matrix;
+    }
+
+    model->ub_model_instance[image_index].copy_data(&ubo_model_instance);
   }
 
-  // Update view projection uniform buffers
+  // Update view uniform buffers
   {
-    VK::UBOViewProjection ubo_view_projection{};
+    VK::UBOView3D ubo_view_3d{};
 
     // View matrix.
-    ubo_view_projection.view = glm::mat4{1.0f};
-    ubo_view_projection.view = glm::translate(
-        ubo_view_projection.view, *this->camera_position);
-    ubo_view_projection.view = glm::rotate(
-      ubo_view_projection.view, this->camera_rotation->y,
-      glm::vec3{0.0, 1.0, 0.0});
-    ubo_view_projection.view = glm::rotate(
-      ubo_view_projection.view, this->camera_rotation->x,
-      glm::vec3{1.0, 0.0, 0.0});
-    ubo_view_projection.view = glm::rotate(
-      ubo_view_projection.view, this->camera_rotation->z,
-      glm::vec3{0.0, 0.0, 1.0});
-    ubo_view_projection.view = glm::inverse(ubo_view_projection.view);
+    ubo_view_3d.view = glm::mat4{1.0f};
+    ubo_view_3d.view = glm::translate(
+      ubo_view_3d.view, *view->camera_position);
+    ubo_view_3d.view = glm::rotate(
+      ubo_view_3d.view, view->camera_rotation->y, glm::vec3{0.0, 1.0, 0.0});
+    ubo_view_3d.view = glm::rotate(
+      ubo_view_3d.view, view->camera_rotation->x, glm::vec3{1.0, 0.0, 0.0});
+    ubo_view_3d.view = glm::rotate(
+      ubo_view_3d.view, view->camera_rotation->z, glm::vec3{0.0, 0.0, 1.0});
+    ubo_view_3d.view = glm::inverse(ubo_view_3d.view);
 
     // Projection matrix.
-    ubo_view_projection.proj = glm::perspective(
+    ubo_view_3d.proj = glm::perspective(
       glm::radians(45.0f),
-      cg_core.screen_width / static_cast<float>(cg_core.screen_height),
+      view->region.z / view->region.w,
       0.1f, 100.0f);
-    ubo_view_projection.proj[1][1] *= -1;
+    ubo_view_3d.proj[1][1] *= -1;
 
-    ubo_view_projection.ambient_color = glm::vec4{0.25, 0.25, 0.25, 1.0};
-
-    this->ub_view_projection[image_index].copy_data(&ubo_view_projection);
+    view->ub_3d[image_index].copy_data(&ubo_view_3d);
   }
 
-  // Update directional light uniform buffers
+  // Update world uniform buffer
   {
-    UBODirectionalLight ubo_directional_light{};
-    ubo_directional_light.direction = glm::vec3{-0.57735, -0.57735, -0.57735};
-    ubo_directional_light.color = glm::vec4{0.8, 0.8, 0.8, 1.0};
-
-    this->ub_directional_light[image_index].copy_data(&ubo_directional_light);
+    UBOWorld3D_Vert ubo_world_3d_vert{};
+    ubo_world_3d_vert.ambient_light_color = glm::vec4{0.25, 0.25, 0.25, 1.0};
+    this->ub_world_vert[image_index].copy_data(&ubo_world_3d_vert);
+
+    UBOWorld3D_Frag ubo_world_3d_frag{};
+    ubo_world_3d_frag.directional_light_direction =
+      glm::vec3{-0.57735, -0.57735, -0.57735};
+    ubo_world_3d_frag.directional_light_color = glm::vec4{0.8, 0.8, 0.8, 1.0};
+    this->ub_world_frag[image_index].copy_data(&ubo_world_3d_frag);
   }
-
-  // Prepare for the next frame.
-  this->models_to_draw[next_frame].clear();
 }
 
 }
diff --git a/src/vk/graphics_pipeline_3d.hpp b/src/vk/graphics_pipeline_3d.hpp
index 97ca63c..a7cf117 100644
--- a/src/vk/graphics_pipeline_3d.hpp
+++ b/src/vk/graphics_pipeline_3d.hpp
@@ -26,6 +26,7 @@
 #include "model.hpp"
 #include "model_instance.hpp"
 #include "uniform_buffer.hpp"
+#include "view.hpp"
 
 namespace VK
 {
@@ -38,27 +39,21 @@ struct GraphicsPipeline3D
   VkImageView depth_image_view;
 
   // FIXME: if this vector get resized, it will cause a segmentation fault!
-  std::vector<UniformBuffer> ub_view_projection;
-  std::vector<UniformBuffer> ub_directional_light;
+  std::vector<UniformBuffer> ub_world_vert;
+  std::vector<UniformBuffer> ub_world_frag;
 
   VkDescriptorPool descriptor_pool;
-  std::vector<VkDescriptorSet> world_view_descriptor_sets;
+  std::vector<VkDescriptorSet> descriptor_sets_world;
 
   std::vector<VkFramebuffer> swapchain_framebuffers;
   VkPipeline graphic_pipeline;
 
-  std::shared_ptr<glm::vec3> camera_position;
-  std::shared_ptr<glm::vec3> camera_rotation;
-  std::vector<std::unordered_map<
-    std::shared_ptr<Model>, std::vector<ModelInstance>>>
-  models_to_draw;
-
   GraphicsPipeline3D();
   ~GraphicsPipeline3D();
 
   void
-  draw(const VkCommandBuffer draw_command_buffer, const size_t current_frame,
-       const size_t next_frame, const uint32_t image_index);
+  draw(std::shared_ptr<View> view, const VkCommandBuffer draw_command_buffer,
+       const size_t current_frame, const uint32_t image_index);
 };
 
 }
diff --git a/src/vk/graphics_pipeline_3d_layout.cpp b/src/vk/graphics_pipeline_3d_layout.cpp
index 62c894c..4374ab9 100644
--- a/src/vk/graphics_pipeline_3d_layout.cpp
+++ b/src/vk/graphics_pipeline_3d_layout.cpp
@@ -22,8 +22,9 @@
 
 namespace
 {
+
 void
-load_descriptor_set_layout_world_view(void *obj)
+load_descriptor_set_world(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
@@ -49,23 +50,59 @@ load_descriptor_set_layout_world_view(void *obj)
 
   if(vkCreateDescriptorSetLayout(
        cg_core.vk_device_with_swapchain->device, &layout_info, nullptr,
-       &self->descriptor_set_world_view) != VK_SUCCESS)
+       &self->descriptor_set_world) != VK_SUCCESS)
     throw CommandError{
       "Failed to create Vulkan descriptor set layout for world view."};
 }
 
 void
-unload_descriptor_set_layout_world_view(void *obj)
+unload_descriptor_set_world(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
   vkDestroyDescriptorSetLayout(
-    cg_core.vk_device_with_swapchain->device,
-    self->descriptor_set_world_view, nullptr);
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_world,
+    nullptr);
+}
+
+void
+load_descriptor_set_view(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
+
+  std::array<VkDescriptorSetLayoutBinding, 1> set_layouts{};
+  set_layouts[0].binding = 0;
+  set_layouts[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  set_layouts[0].descriptorCount = 1;
+  set_layouts[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
+  set_layouts[0].pImmutableSamplers = nullptr;
+
+  VkDescriptorSetLayoutCreateInfo layout_info{};
+  layout_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+  layout_info.pNext = nullptr;
+  layout_info.flags = 0;
+  layout_info.bindingCount = set_layouts.size();
+  layout_info.pBindings = set_layouts.data();
+
+  if(vkCreateDescriptorSetLayout(
+       cg_core.vk_device_with_swapchain->device, &layout_info, nullptr,
+       &self->descriptor_set_view) != VK_SUCCESS)
+    throw CommandError{
+      "Failed to create Vulkan descriptor set layout for world view."};
+}
+
+void
+unload_descriptor_set_view(void *obj)
+{
+  auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
+
+  vkDestroyDescriptorSetLayout(
+    cg_core.vk_device_with_swapchain->device, self->descriptor_set_view,
+    nullptr);
 }
 
 void
-load_descriptor_set_layout_model_instance(void *obj)
+load_descriptor_set_model_instance(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
@@ -99,7 +136,7 @@ load_descriptor_set_layout_model_instance(void *obj)
 }
 
 void
-unload_descriptor_set_layout_model_instance(void *obj)
+unload_descriptor_set_model_instance(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
@@ -109,12 +146,13 @@ unload_descriptor_set_layout_model_instance(void *obj)
 }
 
 void
-load_pipeline_layout(void *obj)
+load_pipeline(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
-  std::array<VkDescriptorSetLayout, 2> set_layouts{
-    self->descriptor_set_world_view,
+  std::array<VkDescriptorSetLayout, 3> set_layouts{
+    self->descriptor_set_world,
+    self->descriptor_set_view,
     self->descriptor_set_model_instance};
 
   VkPipelineLayoutCreateInfo pipeline_layout_info{};
@@ -131,7 +169,7 @@ load_pipeline_layout(void *obj)
 }
 
 void
-unload_pipeline_layout(void *obj)
+unload_pipeline(void *obj)
 {
   auto self = static_cast<VK::GraphicsPipeline3DLayout*>(obj);
 
@@ -226,11 +264,10 @@ unload_render_pass(void *obj)
 }
 
 const CommandChain loader{
-  {&load_descriptor_set_layout_world_view,
-   &unload_descriptor_set_layout_world_view},
-  {&load_descriptor_set_layout_model_instance,
-   &unload_descriptor_set_layout_model_instance},
-  {&load_pipeline_layout, &unload_pipeline_layout},
+  {&load_descriptor_set_world, &unload_descriptor_set_world},
+  {&load_descriptor_set_view, &unload_descriptor_set_view},
+  {&load_descriptor_set_model_instance, &unload_descriptor_set_model_instance},
+  {&load_pipeline, &unload_pipeline},
   {&load_render_pass, &unload_render_pass}
 };
 
diff --git a/src/vk/graphics_pipeline_3d_layout.hpp b/src/vk/graphics_pipeline_3d_layout.hpp
index 296bdb2..d45a778 100644
--- a/src/vk/graphics_pipeline_3d_layout.hpp
+++ b/src/vk/graphics_pipeline_3d_layout.hpp
@@ -22,9 +22,32 @@
 namespace VK
 {
 
+struct UBOWorld3D_Vert
+{
+  glm::vec4 ambient_light_color;
+};
+
+struct UBOWorld3D_Frag
+{
+  glm::vec3 directional_light_direction;
+  glm::vec4 directional_light_color;
+};
+
+struct UBOView3D
+{
+  glm::mat4 view;
+  glm::mat4 proj;
+};
+
+struct UBOModelInstance
+{
+  glm::mat4 instances[128];
+};
+
 struct GraphicsPipeline3DLayout
 {
-  VkDescriptorSetLayout descriptor_set_world_view;
+  VkDescriptorSetLayout descriptor_set_world;
+  VkDescriptorSetLayout descriptor_set_view;
   VkDescriptorSetLayout descriptor_set_model_instance;
   VkPipelineLayout pipeline;
   VkRenderPass render_pass;
diff --git a/src/vk/renderer.cpp b/src/vk/renderer.cpp
index 33a4bf7..e806716 100644
--- a/src/vk/renderer.cpp
+++ b/src/vk/renderer.cpp
@@ -16,64 +16,14 @@
 
 #include "renderer.hpp"
 
+#include <array>
+
 #include "../core.hpp"
 
 namespace
 {
 
 void
-load_frame_sync(void *obj)
-{
-  auto self = static_cast<VK::Renderer*>(obj);
-
-  self->image_available_semaphores.resize(self->max_frames_in_flight);
-  self->render_finished_semaphores.resize(self->max_frames_in_flight);
-  self->in_flight_fences.resize(self->max_frames_in_flight);
-
-  VkSemaphoreCreateInfo semaphore_info = {};
-  semaphore_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
-  semaphore_info.pNext = nullptr;
-  semaphore_info.flags = 0;
-
-  VkFenceCreateInfo fence_info = {};
-  fence_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
-  fence_info.pNext = nullptr;
-  fence_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
-
-  // FIXME: if this loop fails, it will not destroy the semaphores.
-  for(auto i{0}; i < self->max_frames_in_flight; i++)
-  {
-    if(vkCreateSemaphore(
-	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
-	 nullptr, &self->image_available_semaphores[i]) != VK_SUCCESS ||
-       vkCreateSemaphore(
-	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
-	 nullptr, &self->render_finished_semaphores[i]) != VK_SUCCESS ||
-       vkCreateFence(cg_core.vk_device_with_swapchain->device, &fence_info,
-                     nullptr, &self->in_flight_fences[i]) != VK_SUCCESS)
-      throw CommandError{"Failed to create semaphores."};
-  }
-}
-
-void
-unload_frame_sync(void *obj)
-{
-  auto self = static_cast<VK::Renderer*>(obj);
-
-  vkDeviceWaitIdle(cg_core.vk_device_with_swapchain->device);
-
-  for(auto i{0}; i < self->max_frames_in_flight; i++)
-  {
-    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
-                       self->render_finished_semaphores[i], nullptr);
-    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
-                       self->image_available_semaphores[i], nullptr);
-    vkDestroyFence(cg_core.vk_device_with_swapchain->device,
-		   self->in_flight_fences[i], nullptr);
-  }
-}
-
-void
 load_queue_family(void *obj)
 {
   auto self = static_cast<VK::Renderer*>(obj);
@@ -103,9 +53,10 @@ unload_command_pool(void *obj)
 {
   auto self = static_cast<VK::Renderer*>(obj);
 
-  vkWaitForFences(cg_core.vk_device_with_swapchain->device, 2,
-                  self->in_flight_fences.data(), VK_TRUE,
-                  std::numeric_limits<uint64_t>::max());
+  vkWaitForFences(cg_core.vk_device_with_swapchain->device,
+		  VK::Swapchain::max_frames_in_flight,
+		  cg_core.vk_swapchain->in_flight_fences.data(), VK_TRUE,
+		  std::numeric_limits<uint64_t>::max());
   vkDestroyCommandPool(
     self->queue_family->device->device, self->command_pool, nullptr);
 }
@@ -132,7 +83,6 @@ load_draw_command_buffer(void *obj)
 }
 
 const CommandChain loader{
-  {&load_frame_sync, &unload_frame_sync},
   {&load_queue_family, nullptr},
   {&load_command_pool, &unload_command_pool},
   {&load_draw_command_buffer, nullptr}
@@ -143,12 +93,18 @@ const CommandChain loader{
 namespace VK
 {
 
-Renderer::Renderer():
-  current_frame{0}
+Renderer::Renderer(std::vector<std::shared_ptr<View>> views):
+  models_to_draw{cg_core.vk_swapchain->images_count},
+  views{views}
 {
   loader.execute(this);
 }
 
+Renderer::Renderer(std::initializer_list<std::shared_ptr<View>> views):
+  Renderer{std::vector<std::shared_ptr<View>>(views)}
+{
+}
+
 Renderer::~Renderer()
 {
   loader.revert(this);
@@ -158,24 +114,26 @@ void
 Renderer::draw()
 {
   vkWaitForFences(cg_core.vk_device_with_swapchain->device, 1,
-                  &this->in_flight_fences[this->current_frame], VK_TRUE,
-                  std::numeric_limits<uint64_t>::max());
+		  &cg_core.vk_swapchain->in_flight_fences[
+		    cg_core.vk_swapchain->current_frame], VK_TRUE,
+		  std::numeric_limits<uint64_t>::max());
   vkResetFences(cg_core.vk_device_with_swapchain->device, 1,
-                &this->in_flight_fences[this->current_frame]);
+                &cg_core.vk_swapchain->in_flight_fences[
+		  cg_core.vk_swapchain->current_frame]);
 
   uint32_t image_index;
   vkAcquireNextImageKHR(
-      cg_core.vk_device_with_swapchain->device, cg_core.vk_swapchain->swapchain,
-      std::numeric_limits<uint64_t>::max(),
-      this->image_available_semaphores[this->current_frame],
-      VK_NULL_HANDLE, &image_index);
+      cg_core.vk_device_with_swapchain->device,
+      cg_core.vk_swapchain->swapchain, std::numeric_limits<uint64_t>::max(),
+      cg_core.vk_swapchain->image_available_semaphores[
+	cg_core.vk_swapchain->current_frame], VK_NULL_HANDLE, &image_index);
 
   VkCommandBuffer draw_command_buffer =
-    this->draw_command_buffers[this->current_frame];
+    this->draw_command_buffers[cg_core.vk_swapchain->current_frame];
   vkResetCommandBuffer(draw_command_buffer, 0);
 
-  auto next_frame = this->current_frame + 1;
-  if(next_frame == this->max_frames_in_flight) next_frame = 0;
+  auto next_frame = cg_core.vk_swapchain->current_frame + 1;
+  if(next_frame == Swapchain::max_frames_in_flight) next_frame = 0;
 
   // Begin command buffer.
   {
@@ -187,10 +145,64 @@ Renderer::draw()
       throw std::runtime_error{"Failed to beggin draw command buffer."};
   }
 
-  cg_core.vk_graphics_pipeline_3d->draw(
-    draw_command_buffer, current_frame, next_frame, image_index);
-  cg_core.vk_graphics_pipeline_2d->draw(
-    draw_command_buffer, current_frame, next_frame, image_index);
+  // 3D drawing.
+  {
+    // Dark gray blue.
+    std::array<VkClearValue, 2> clear_values{};
+    clear_values[0].color = {0.12f, 0.12f, 0.18f, 1.0f};
+    clear_values[1].depthStencil = {1.0f, 0};
+
+    VkRenderPassBeginInfo render_pass_begin{};
+    render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
+    render_pass_begin.pNext = nullptr;
+    render_pass_begin.renderPass =
+      cg_core.vk_graphics_pipeline_3d_layout->render_pass;
+    render_pass_begin.framebuffer =
+      cg_core.vk_graphics_pipeline_3d->swapchain_framebuffers[image_index];
+    render_pass_begin.renderArea.offset = {0, 0};
+    render_pass_begin.renderArea.extent = {
+      static_cast<uint32_t>(cg_core.screen_width),
+      static_cast<uint32_t>(cg_core.screen_height)};
+    render_pass_begin.clearValueCount = clear_values.size();
+    render_pass_begin.pClearValues = clear_values.data();
+
+    vkCmdBeginRenderPass(
+      draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
+
+    for(auto &view: this->views)
+      cg_core.vk_graphics_pipeline_3d->draw(
+	view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
+	image_index);
+
+    vkCmdEndRenderPass(draw_command_buffer);
+  }
+
+  // 2D drawing
+  {
+    VkRenderPassBeginInfo render_pass_begin{};
+    render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
+    render_pass_begin.pNext = nullptr;
+    render_pass_begin.renderPass =
+      cg_core.vk_graphics_pipeline_2d_layout->render_pass;
+    render_pass_begin.framebuffer =
+      cg_core.vk_graphics_pipeline_2d->swapchain_framebuffers[image_index];
+    render_pass_begin.renderArea.offset = {0, 0};
+    render_pass_begin.renderArea.extent = {
+      static_cast<uint32_t>(cg_core.screen_width),
+      static_cast<uint32_t>(cg_core.screen_height)};
+    render_pass_begin.clearValueCount = 0;
+    render_pass_begin.pClearValues = nullptr;
+
+    vkCmdBeginRenderPass(
+      draw_command_buffer, &render_pass_begin, VK_SUBPASS_CONTENTS_INLINE);
+
+    for(auto &view: this->views)
+     cg_core.vk_graphics_pipeline_2d->draw(
+       view, draw_command_buffer, cg_core.vk_swapchain->current_frame,
+       next_frame, image_index);
+
+    vkCmdEndRenderPass(draw_command_buffer);
+  }
 
   // End command buffer.
   if(vkEndCommandBuffer(draw_command_buffer) != VK_SUCCESS)
@@ -201,11 +213,13 @@ Renderer::draw()
     auto queue{this->queue_family->get_queue()};
 
     VkSemaphore wait_semaphores[]{
-      this->image_available_semaphores[this->current_frame]};
+      cg_core.vk_swapchain->image_available_semaphores[
+	cg_core.vk_swapchain->current_frame]};
     VkPipelineStageFlags wait_stages[] =
       {VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT};
     VkSemaphore signal_semaphores[]{
-      this->render_finished_semaphores[this->current_frame]};
+      cg_core.vk_swapchain->render_finished_semaphores[
+	cg_core.vk_swapchain->current_frame]};
 
     VkSubmitInfo submit_info{};
     submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
@@ -219,8 +233,8 @@ Renderer::draw()
     submit_info.pSignalSemaphores = signal_semaphores;
 
     if(vkQueueSubmit(
-	 queue.queue, 1, &submit_info,
-	 this->in_flight_fences[this->current_frame]) != VK_SUCCESS)
+	 queue.queue, 1, &submit_info, cg_core.vk_swapchain->in_flight_fences[
+	   cg_core.vk_swapchain->current_frame]) != VK_SUCCESS)
       throw std::runtime_error{"Failed to submit draw command buffer."};
 
     VkSwapchainKHR swap_chains[]{cg_core.vk_swapchain->swapchain};
@@ -239,7 +253,8 @@ Renderer::draw()
   }
 
   // Prepare for the next frame.
-  this->current_frame = next_frame;
+  this->models_to_draw[next_frame].clear();
+  cg_core.vk_swapchain->current_frame = next_frame;
 }
 
 }
diff --git a/src/vk/renderer.hpp b/src/vk/renderer.hpp
index 4b6c91d..4cd7739 100644
--- a/src/vk/renderer.hpp
+++ b/src/vk/renderer.hpp
@@ -17,27 +17,32 @@
 #ifndef CANDY_GEAR_VK_RENDERER_H
 #define CANDY_GEAR_VK_RENDERER_H 1
 
+#include <initializer_list>
+#include <memory>
 #include <vector>
 
 #include "core.hpp"
+#include "model.hpp"
+#include "model_instance.hpp"
 #include "queue_family.hpp"
+#include "view.hpp"
 
 namespace VK
 {
 
 struct Renderer
 {
-  static const int max_frames_in_flight{2};
-  size_t current_frame;
-  std::vector<VkSemaphore> image_available_semaphores;
-  std::vector<VkSemaphore> render_finished_semaphores;
-  std::vector<VkFence> in_flight_fences;
+  std::vector<std::unordered_map<
+    std::shared_ptr<Model>, std::vector<ModelInstance>>>
+  models_to_draw;
 
+  std::vector<std::shared_ptr<View>> views;
   QueueFamily *queue_family;
   VkCommandPool command_pool;
   std::vector<VkCommandBuffer> draw_command_buffers;
 
-  Renderer();
+  Renderer(std::vector<std::shared_ptr<View>> views);
+  Renderer(std::initializer_list<std::shared_ptr<View>> views);
   ~Renderer();
 
   void
diff --git a/src/vk/swapchain.cpp b/src/vk/swapchain.cpp
index 678279e..1dd19d9 100644
--- a/src/vk/swapchain.cpp
+++ b/src/vk/swapchain.cpp
@@ -127,9 +127,62 @@ unload_image_view(void *obj)
       cg_core.vk_device_with_swapchain->device, self->image_views[i], nullptr);
 }
 
+void
+load_frame_sync(void *obj)
+{
+  auto self = static_cast<VK::Swapchain*>(obj);
+
+  self->image_available_semaphores.resize(self->max_frames_in_flight);
+  self->render_finished_semaphores.resize(self->max_frames_in_flight);
+  self->in_flight_fences.resize(self->max_frames_in_flight);
+
+  VkSemaphoreCreateInfo semaphore_info = {};
+  semaphore_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+  semaphore_info.pNext = nullptr;
+  semaphore_info.flags = 0;
+
+  VkFenceCreateInfo fence_info = {};
+  fence_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+  fence_info.pNext = nullptr;
+  fence_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
+
+  // FIXME: if this loop fails, it will not destroy the semaphores.
+  for(auto i{0}; i < self->max_frames_in_flight; i++)
+  {
+    if(vkCreateSemaphore(
+	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
+	 nullptr, &self->image_available_semaphores[i]) != VK_SUCCESS ||
+       vkCreateSemaphore(
+	 cg_core.vk_device_with_swapchain->device, &semaphore_info,
+	 nullptr, &self->render_finished_semaphores[i]) != VK_SUCCESS ||
+       vkCreateFence(cg_core.vk_device_with_swapchain->device, &fence_info,
+                     nullptr, &self->in_flight_fences[i]) != VK_SUCCESS)
+      throw CommandError{"Failed to create semaphores."};
+  }
+}
+
+void
+unload_frame_sync(void *obj)
+{
+  auto self = static_cast<VK::Swapchain*>(obj);
+
+  vkDeviceWaitIdle(cg_core.vk_device_with_swapchain->device);
+
+  for(auto i{0}; i < self->max_frames_in_flight; i++)
+  {
+    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
+                       self->render_finished_semaphores[i], nullptr);
+    vkDestroySemaphore(cg_core.vk_device_with_swapchain->device,
+                       self->image_available_semaphores[i], nullptr);
+    vkDestroyFence(cg_core.vk_device_with_swapchain->device,
+		   self->in_flight_fences[i], nullptr);
+  }
+}
+
 const CommandChain loader{
   {&load_swapchain, &unload_swapchain},
-  {&load_image_view, &unload_image_view}
+  {&load_image_view, &unload_image_view},
+  {&load_frame_sync, &unload_frame_sync}
 };
 
 }
@@ -137,7 +190,8 @@ const CommandChain loader{
 namespace VK
 {
 
-Swapchain::Swapchain()
+Swapchain::Swapchain():
+  current_frame{0}
 {
   loader.execute(this);
 }
diff --git a/src/vk/swapchain.hpp b/src/vk/swapchain.hpp
index 64df208..a5ade81 100644
--- a/src/vk/swapchain.hpp
+++ b/src/vk/swapchain.hpp
@@ -32,6 +32,12 @@ struct Swapchain
   VkImage *images;
   VkImageView *image_views;
 
+  static const int max_frames_in_flight{2};
+  size_t current_frame;
+  std::vector<VkSemaphore> image_available_semaphores;
+  std::vector<VkSemaphore> render_finished_semaphores;
+  std::vector<VkFence> in_flight_fences;
+
   Swapchain();
   ~Swapchain();
 };
diff --git a/src/vk/uniform_buffer.hpp b/src/vk/uniform_buffer.hpp
index 2cee9ff..e978894 100644
--- a/src/vk/uniform_buffer.hpp
+++ b/src/vk/uniform_buffer.hpp
@@ -26,34 +26,6 @@
 namespace VK
 {
 
-struct UBOSpritePositions
-{
-  glm::vec4 positions[128];
-};
-
-struct UBOProjection
-{
-  glm::mat4 proj;
-};
-
-struct UBOModelInstance
-{
-  glm::mat4 instances[128];
-};
-
-struct UBOViewProjection
-{
-  glm::mat4 view;
-  glm::mat4 proj;
-  glm::vec4 ambient_color;
-};
-
-struct UBODirectionalLight
-{
-  glm::vec3 direction;
-  glm::vec4 color;
-};
-
 // FIXME: this class need to delete or create custom copy constructors!
 class UniformBuffer: public BaseBuffer
 {
diff --git a/src/vk/view.cpp b/src/vk/view.cpp
new file mode 100644
index 0000000..16ee60c
--- /dev/null
+++ b/src/vk/view.cpp
@@ -0,0 +1,259 @@
+/*
+ * Copyright 2022 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "view.hpp"
+
+#include <array>
+
+#include "../core.hpp"
+
+namespace
+{
+
+void
+load_3d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  try
+  {
+    self->ub_3d.reserve(cg_core.vk_swapchain->images_count);
+    for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+      self->ub_3d.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(VK::UBOView3D));
+  }
+  catch(const std::exception& e)
+  {
+    throw CommandError{e.what()};
+  }
+}
+
+void
+unload_3d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  self->ub_3d.clear();
+}
+
+void
+load_2d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  try
+  {
+    self->ub_2d.reserve(cg_core.vk_swapchain->images_count);
+    for(auto i{0}; i < cg_core.vk_swapchain->images_count; i++)
+      self->ub_2d.emplace_back(
+	cg_core.vk_device_with_swapchain, sizeof(VK::UBOView2D));
+  }
+  catch(const std::exception& e)
+  {
+    throw CommandError{e.what()};
+  }
+}
+
+void
+unload_2d_uniform_buffer(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  self->ub_2d.clear();
+}
+
+void
+load_descriptor_pool(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  uint32_t uniform_buffer_count = self->ub_3d.size() + self->ub_2d.size();
+
+  VkDescriptorPoolSize descriptor_pool_size{};
+  descriptor_pool_size.type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  descriptor_pool_size.descriptorCount = uniform_buffer_count;
+
+  VkDescriptorPoolCreateInfo pool_info{};
+  pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
+  pool_info.pNext = nullptr;
+  pool_info.flags = 0;
+  pool_info.maxSets = uniform_buffer_count;
+  pool_info.poolSizeCount = 1;
+  pool_info.pPoolSizes = &descriptor_pool_size;
+
+  if(vkCreateDescriptorPool(
+       cg_core.vk_device_with_swapchain->device, &pool_info, nullptr,
+       &self->descriptor_pool) != VK_SUCCESS)
+    throw CommandError{"Failed to create a Vulkan descriptor pool."};
+}
+
+void
+unload_descriptor_pool(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  vkDestroyDescriptorPool(
+    cg_core.vk_device_with_swapchain->device, self->descriptor_pool,
+    nullptr);
+}
+
+void
+load_descriptor_sets_3d(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  std::vector<VkDescriptorSetLayout> layouts(
+    cg_core.vk_swapchain->images_count,
+    cg_core.vk_graphics_pipeline_3d_layout->descriptor_set_view);
+
+  VkDescriptorSetAllocateInfo alloc_info{};
+  alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+  alloc_info.descriptorPool = self->descriptor_pool;
+  alloc_info.descriptorSetCount = layouts.size();
+  alloc_info.pSetLayouts = layouts.data();
+
+  self->descriptor_sets_3d.resize(layouts.size());
+  if(vkAllocateDescriptorSets(
+       cg_core.vk_device_with_swapchain->device, &alloc_info,
+       self->descriptor_sets_3d.data()) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan descriptor sets for view."};
+}
+
+void
+load_descriptor_sets_2d(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  std::vector<VkDescriptorSetLayout> layouts(
+    cg_core.vk_swapchain->images_count,
+    cg_core.vk_graphics_pipeline_2d_layout->descriptor_set_view);
+
+  VkDescriptorSetAllocateInfo alloc_info{};
+  alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+  alloc_info.descriptorPool = self->descriptor_pool;
+  alloc_info.descriptorSetCount = layouts.size();
+  alloc_info.pSetLayouts = layouts.data();
+
+  self->descriptor_sets_2d.resize(layouts.size());
+  if(vkAllocateDescriptorSets(
+       cg_core.vk_device_with_swapchain->device, &alloc_info,
+       self->descriptor_sets_2d.data()) != VK_SUCCESS)
+    throw CommandError{"Failed to create Vulkan descriptor sets for view."};
+}
+
+void
+load_resources_to_descriptor_sets_3d(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  for(auto i{0}; i < self->ub_3d.size(); i++)
+  {
+    VkDescriptorBufferInfo view_3d_info{};
+    view_3d_info.buffer = self->ub_3d[i].buffer;
+    view_3d_info.offset = 0;
+    view_3d_info.range = sizeof(VK::UBOView3D);
+
+    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
+    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    write_descriptors[0].dstSet = self->descriptor_sets_3d[i];
+    write_descriptors[0].dstBinding = 0;
+    write_descriptors[0].dstArrayElement = 0;
+    write_descriptors[0].descriptorCount = 1;
+    write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    write_descriptors[0].pBufferInfo = &view_3d_info;
+    write_descriptors[0].pImageInfo = nullptr;
+    write_descriptors[0].pTexelBufferView = nullptr;
+
+    vkUpdateDescriptorSets(
+      cg_core.vk_device_with_swapchain->device, write_descriptors.size(),
+      write_descriptors.data(), 0, nullptr);
+
+    VK::UBOView3D ubo_view_3d;
+    ubo_view_3d.proj = glm::ortho(
+      0.0f, self->region.z,
+      0.0f, self->region.w,
+      0.0f, 100.0f);
+    self->ub_3d[i].copy_data(&ubo_view_3d);
+  }
+}
+
+void
+load_resources_to_descriptor_sets_2d(void *obj)
+{
+  auto self = static_cast<VK::View*>(obj);
+
+  for(auto i{0}; i < self->ub_2d.size(); i++)
+  {
+    VkDescriptorBufferInfo view_2d_info{};
+    view_2d_info.buffer = self->ub_2d[i].buffer;
+    view_2d_info.offset = 0;
+    view_2d_info.range = sizeof(VK::UBOView2D);
+
+    std::array<VkWriteDescriptorSet, 1> write_descriptors{};
+    write_descriptors[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    write_descriptors[0].dstSet = self->descriptor_sets_2d[i];
+    write_descriptors[0].dstBinding = 0;
+    write_descriptors[0].dstArrayElement = 0;
+    write_descriptors[0].descriptorCount = 1;
+    write_descriptors[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    write_descriptors[0].pBufferInfo = &view_2d_info;
+    write_descriptors[0].pImageInfo = nullptr;
+    write_descriptors[0].pTexelBufferView = nullptr;
+
+    vkUpdateDescriptorSets(
+      cg_core.vk_device_with_swapchain->device, write_descriptors.size(),
+      write_descriptors.data(), 0, nullptr);
+
+    VK::UBOView2D ubo_view_2d;
+    ubo_view_2d.proj = glm::ortho(
+      0.0f, self->region.z,
+      0.0f, self->region.w,
+      0.0f, 100.0f);
+    self->ub_2d[i].copy_data(&ubo_view_2d);
+  }
+}
+
+const CommandChain loader{
+  {&load_3d_uniform_buffer, &unload_3d_uniform_buffer},
+  {&load_2d_uniform_buffer, &unload_2d_uniform_buffer},
+  {&load_descriptor_pool, &unload_descriptor_pool},
+  // By destroying the pool the sets are also destroyed.
+  {&load_descriptor_sets_3d, nullptr},
+  {&load_descriptor_sets_2d, nullptr},
+  {&load_resources_to_descriptor_sets_3d, nullptr},
+  {&load_resources_to_descriptor_sets_2d, nullptr}
+};
+
+}
+
+namespace VK
+{
+
+View::View(glm::vec4 region):
+  region{region},
+  camera_position{std::make_shared<glm::vec3>(0.0f, 0.0f, 0.0f)},
+  camera_rotation{std::make_shared<glm::vec3>(0.0f, 0.0f, 0.0f)},
+  sprites_to_draw{cg_core.vk_swapchain->images_count}
+{
+  loader.execute(this);
+}
+
+View::~View()
+{
+  loader.revert(this);
+}
+
+}
diff --git a/src/vk/view.hpp b/src/vk/view.hpp
new file mode 100644
index 0000000..3936413
--- /dev/null
+++ b/src/vk/view.hpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2022 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef CANDY_GEAR_VK_VIEW_H
+#define CANDY_GEAR_VK_VIEW_H 1
+
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+#include "core.hpp"
+#include "sprite.hpp"
+
+namespace VK
+{
+
+struct View
+{
+  glm::vec4 region;
+
+  // FIXME: if these vectors get resized, they can cause a segmentation fault!
+  std::vector<UniformBuffer> ub_3d;
+  std::vector<UniformBuffer> ub_2d;
+
+  VkDescriptorPool descriptor_pool;
+  std::vector<VkDescriptorSet> descriptor_sets_3d;
+  std::vector<VkDescriptorSet> descriptor_sets_2d;
+
+  std::shared_ptr<glm::vec3> camera_position;
+  std::shared_ptr<glm::vec3> camera_rotation;
+
+  std::vector<
+    std::unordered_map<std::shared_ptr<Sprite>, std::vector<glm::vec4>>>
+  sprites_to_draw;
+
+  View(glm::vec4 region);
+  ~View();
+};
+
+}
+
+#endif /* CANDY_GEAR_VK_VIEW_H */