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feat(renderer2d): Rotation2D now actually has an effect on the rotation of the sprite in the Renderer2D

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lisk77 2025-07-12 00:01:49 +02:00
parent 7760baeab5
commit ffb4bdf35f
2 changed files with 73 additions and 10 deletions
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44
crates/comet_renderer/src/renderer2d.rs Normal file → Executable file
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@ -572,9 +572,8 @@ impl<'a> Renderer2D<'a> {
let transform_component = scene.get_component::<Transform2D>(entity).unwrap();
if renderer_component.is_visible() {
let mut position = transform_component.position().clone();
position.set_x(position.x() / self.config().width as f32);
position.set_y(position.y() / self.config().height as f32);
let world_position = transform_component.position().clone();
let rotation_angle = transform_component.rotation().to_radians();
let mut t_region: Option<&TextureRegion> = None;
match self.get_texture_region(renderer_component.get_texture().to_string()) {
@ -586,16 +585,43 @@ impl<'a> Renderer2D<'a> {
let region = t_region.unwrap();
let (dim_x, dim_y) = region.dimensions();
let (bound_x, bound_y) =
((dim_x as f32/ self.config().width as f32) * 0.5, (dim_y as f32/ self.config().height as f32) * 0.5);
let half_width = dim_x as f32 * 0.5;
let half_height = dim_y as f32 * 0.5;
let buffer_size = vertex_buffer.len() as u16;
let world_corners = [
(-half_width, half_height),
(-half_width, -half_height),
(half_width, -half_height),
(half_width, half_height),
];
let cos_angle = rotation_angle.cos();
let sin_angle = rotation_angle.sin();
let mut rotated_world_corners = [(0.0f32, 0.0f32); 4];
for i in 0..4 {
let (x, y) = world_corners[i];
rotated_world_corners[i] = (
x * cos_angle - y * sin_angle + world_position.x(),
x * sin_angle + y * cos_angle + world_position.y()
);
}
let mut screen_corners = [(0.0f32, 0.0f32); 4];
for i in 0..4 {
screen_corners[i] = (
rotated_world_corners[i].0 / self.config().width as f32,
rotated_world_corners[i].1 / self.config().height as f32
);
}
vertex_buffer.append(&mut vec![
Vertex :: new ( [-bound_x + position.x(), bound_y + position.y(), 0.0], [region.u0(), region.v0()], [1.0, 1.0, 1.0, 1.0] ),
Vertex :: new ( [-bound_x + position.x(), -bound_y + position.y(), 0.0], [region.u0(), region.v1()], [1.0, 1.0, 1.0, 1.0] ),
Vertex :: new ( [ bound_x + position.x(), -bound_y + position.y(), 0.0], [region.u1(), region.v1()], [1.0, 1.0, 1.0, 1.0] ) ,
Vertex :: new ( [ bound_x + position.x(), bound_y + position.y(), 0.0], [region.u1(), region.v0()], [1.0, 1.0, 1.0, 1.0] )
Vertex :: new ( [screen_corners[0].0, screen_corners[0].1, 0.0], [region.u0(), region.v0()], [1.0, 1.0, 1.0, 1.0] ),
Vertex :: new ( [screen_corners[1].0, screen_corners[1].1, 0.0], [region.u0(), region.v1()], [1.0, 1.0, 1.0, 1.0] ),
Vertex :: new ( [screen_corners[2].0, screen_corners[2].1, 0.0], [region.u1(), region.v1()], [1.0, 1.0, 1.0, 1.0] ) ,
Vertex :: new ( [screen_corners[3].0, screen_corners[3].1, 0.0], [region.u1(), region.v0()], [1.0, 1.0, 1.0, 1.0] )
]);
index_buffer.append(&mut vec![