gered/ggdt
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

use bitmap sampling method instead of manually calculating it

Browse source
This commit is contained in:
Gered 2023-04-01 00:50:56 -04:00
parent ed58dc39cd
commit 80d3ae91e7
1 changed files with 3 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
ggdt/src/graphics/bitmap/triangles.rs
View file

@ -29,17 +29,15 @@ impl<PixelType: Pixel> Bitmap<PixelType> {
c_tex: Vector2, c_tex: Vector2,
texture: &Bitmap<PixelType>, texture: &Bitmap<PixelType>,
) { ) {
let texture_width = texture.width() as f32;
let texture_height = texture.height() as f32;
let inverse_area = 1.0 / cross(a, b, c); // inverting to avoid division let inverse_area = 1.0 / cross(a, b, c); // inverting to avoid division
self.triangle_2d_custom( self.triangle_2d_custom(
a, // a, //
b, b,
c, c,
|dest_pixels, w0, w1, w2| { |dest_pixels, w0, w1, w2| {
let u = (w0 * a_tex.x + w1 * b_tex.x + w2 * c_tex.x) * inverse_area * texture_width; let u = (w0 * a_tex.x + w1 * b_tex.x + w2 * c_tex.x) * inverse_area;
let v = (w0 * a_tex.y + w1 * b_tex.y + w2 * c_tex.y) * inverse_area * texture_height; let v = (w0 * a_tex.y + w1 * b_tex.y + w2 * c_tex.y) * inverse_area;
*dest_pixels = unsafe { texture.get_pixel_unchecked(u as i32, v as i32) }; *dest_pixels = texture.sample_at(u, v);
}, },
) )
} }