#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec3 in_position;
layout(location = 1) in vec3 in_normal;
layout(location = 2) in vec2 in_texture_coord;


layout(location = 0) out DataTransferObject
{
  vec4 frag_color;
  vec2 frag_texture_coord;
  vec3 normal;
} out_dto;

layout(set = 0, binding = 0) uniform UBOViewProjection
{
  mat4 view;
  mat4 proj;
  vec4 ambient_color;
} ubo_view_projection;

layout(set = 1, binding = 0) uniform UBOModelInstance
{
  mat4 model[128];
} ubo_model_instance;

void
main()
{
  gl_Position =
      ubo_view_projection.proj * ubo_view_projection.view *
      ubo_model_instance.model[gl_InstanceIndex] * vec4(in_position, 1.0);
  out_dto.frag_color = ubo_view_projection.ambient_color;
  out_dto.frag_texture_coord = in_texture_coord;
  out_dto.normal = mat3(ubo_model_instance.model[gl_InstanceIndex]) *
    in_normal;
}