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Fixed face culling

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This commit is contained in:
Lorenzo Torres 2025-08-06 15:50:05 +02:00
parent 8a56f94b7f
commit fb031e8a66
4 changed files with 7 additions and 11 deletions
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12
src/math.zig
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@ -63,16 +63,12 @@ pub const Matrix = struct {
pub fn perspective(fov: f32, aspect: f32, near: f32, far: f32) Matrix {
const focal_length = 1.0 / tan(fov / 2.0);
const x = focal_length / aspect;
const y = -focal_length;
const a = near / (far - near);
const b = far * a;
const projection = [4][4]f32{
[4]f32{ x, 0.0, 0.0, 0.0 },
[4]f32{ 0.0, y, 0.0, 0.0 },
[4]f32{ 0.0, 0.0, a, b },
[4]f32{ 0.0, 0.0, 1.0, 0.0 },
[4]f32{ focal_length / aspect, 0.0, 0.0, 0.0 },
[4]f32{ 0.0, -focal_length, 0.0, 0.0 },
[4]f32{ 0.0, 0.0, far / (far - near), 1.0 },
[4]f32{ 0.0, 0.0, -(far * near) / (far - near), 0.0 },
};
return .{