feat Create rectangles

1 files changed, 224 insertions, 0 deletions

diff --git a/src/rectangle.cpp b/src/rectangle.cpp
new file mode 100644
index 0000000..3bc0a84
--- /dev/null
+++ b/src/rectangle.cpp
@@ -0,0 +1,224 @@
+/*
+ * 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 "rectangle.hpp"
+
+namespace
+{
+
+constexpr bool
+align_vertically(float a_x, float a_width, float b_x, float b_width)
+{
+  return a_x <= b_x + b_width && a_x + a_width >= b_x;
+}
+
+constexpr bool
+align_horizontally(float a_y, float a_height, float b_y, float b_height)
+{
+  return a_y <= b_y + b_height && a_y + a_height >= b_y;
+}
+
+}
+
+void
+cg_free_rectangle(mrb_state *mrb, void* obj)
+{
+  auto ptr = static_cast<cg_rectangle*>(obj);
+
+  mrb_free(mrb, ptr);
+}
+
+const struct mrb_data_type cg_rectangle_type = {
+  "CG_Rectangle", cg_free_rectangle };
+
+static mrb_value
+cg_cRectangle_initialize(mrb_state *mrb, mrb_value self)
+{
+  mrb_float x, y, width, height;
+  struct cg_rectangle *ptr;
+
+  mrb_get_args(mrb, "ffff", &x, &y, &width, &height);
+  ptr = (cg_rectangle *)DATA_PTR(self);
+  if(ptr) mrb_free(mrb, ptr);
+  ptr = (cg_rectangle *)mrb_malloc(mrb, sizeof(cg_rectangle));
+
+  ptr->x = x;
+  ptr->y = y;
+  ptr->width = width;
+  ptr->height = height;
+
+  mrb_data_init(self, ptr, &cg_rectangle_type);
+  return self;
+}
+
+static mrb_value
+cg_cRectangle_get_x(mrb_state *mrb, mrb_value self)
+{
+  auto ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_float_value(mrb, ptr->x);
+}
+
+static mrb_value
+cg_cRectangle_set_x(mrb_state *mrb, mrb_value self)
+{
+  mrb_float x;
+  auto ptr = (cg_rectangle *)DATA_PTR(self);
+
+  mrb_get_args(mrb, "f", &x);
+
+  ptr->x = x;
+
+  return mrb_float_value(mrb, ptr->x);
+}
+
+static mrb_value
+cg_cRectangle_get_y(mrb_state *mrb, mrb_value self)
+{
+  auto ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_float_value(mrb, ptr->y);
+}
+
+static mrb_value
+cg_cRectangle_set_y(mrb_state *mrb, mrb_value self)
+{
+  mrb_float y;
+  auto *ptr = (cg_rectangle *)DATA_PTR(self);
+
+  mrb_get_args(mrb, "f", &y);
+
+  ptr->y = y;
+
+  return mrb_float_value(mrb, ptr->y);
+}
+
+static mrb_value
+cg_cRectangle_get_width(mrb_state *mrb, mrb_value self)
+{
+  auto *ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_float_value(mrb, ptr->width);
+}
+
+static mrb_value
+cg_cRectangle_set_width(mrb_state *mrb, mrb_value self)
+{
+  mrb_float width;
+  auto *ptr = (struct cg_rectangle *)DATA_PTR(self);
+
+  mrb_get_args(mrb, "f", &width);
+
+  ptr->width = width;
+
+  return mrb_float_value(mrb, ptr->width);
+}
+
+static mrb_value
+cg_cRectangle_get_height(mrb_state *mrb, mrb_value self)
+{
+  auto *ptr = (struct cg_rectangle *)DATA_PTR(self);
+
+  return mrb_float_value(mrb, ptr->height);
+}
+
+static mrb_value
+cg_cRectangle_set_height(mrb_state *mrb, mrb_value self)
+{
+  mrb_float height;
+  auto *ptr = (cg_rectangle *)DATA_PTR(self);
+
+  mrb_get_args(mrb, "f", &height);
+
+  ptr->height = height;
+
+  return mrb_float_value(mrb, ptr->height);
+}
+
+static mrb_value
+cg_cRectangle_align_vertically(mrb_state *mrb, mrb_value self)
+{
+  cg_rectangle *ptr, *that;
+
+  mrb_get_args(mrb, "d", &that, &cg_rectangle_type);
+  ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_bool_value(
+    align_vertically(ptr->x, ptr->width, that->x, that->width));
+}
+
+static mrb_value
+cg_cRectangle_align_horizontally(mrb_state *mrb, mrb_value self)
+{
+  cg_rectangle *ptr, *that;
+
+  mrb_get_args(mrb, "d", &that, &cg_rectangle_type);
+  ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_bool_value(
+    align_horizontally(ptr->y, ptr->height, that->y, that->height));
+}
+
+static mrb_value
+cg_cRectangle_collide(mrb_state *mrb, mrb_value self)
+{
+  cg_rectangle *ptr, *that;
+
+  mrb_get_args(mrb, "d", &that, &cg_rectangle_type);
+  ptr = (cg_rectangle *)DATA_PTR(self);
+
+  return mrb_bool_value(
+    align_vertically(ptr->x, ptr->width, that->x, that->width) &&
+    align_horizontally(ptr->y, ptr->height, that->y, that->height));
+}
+
+void
+cg_rectangle_init(mrb_state *mrb)
+{
+  RClass *cg_m, *cg_cRectangle;
+
+  cg_m = mrb_module_get(mrb, "CandyGear");
+  cg_cRectangle = mrb_define_class_under(
+    mrb, cg_m, "Rectangle", mrb->object_class);
+  MRB_SET_INSTANCE_TT(cg_cRectangle, MRB_TT_DATA);
+  mrb_define_method(
+    mrb, cg_cRectangle, "initialize", cg_cRectangle_initialize,
+    MRB_ARGS_REQ(4));
+  mrb_define_method(
+    mrb, cg_cRectangle, "x", cg_cRectangle_get_x, MRB_ARGS_NONE());
+  mrb_define_method(
+    mrb, cg_cRectangle, "x=", cg_cRectangle_set_x, MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "y", cg_cRectangle_get_y, MRB_ARGS_NONE());
+  mrb_define_method(
+    mrb, cg_cRectangle, "y=", cg_cRectangle_set_y, MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "width", cg_cRectangle_get_width, MRB_ARGS_NONE());
+  mrb_define_method(
+    mrb, cg_cRectangle, "width=", cg_cRectangle_set_width, MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "height", cg_cRectangle_get_height, MRB_ARGS_NONE());
+  mrb_define_method(
+    mrb, cg_cRectangle, "height=", cg_cRectangle_set_height, MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "align_vertically?", cg_cRectangle_align_vertically,
+    MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "align_horizontally?",
+    cg_cRectangle_align_horizontally, MRB_ARGS_REQ(1));
+  mrb_define_method(
+    mrb, cg_cRectangle, "collide?", cg_cRectangle_collide, MRB_ARGS_REQ(1));
+}