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Update shaders to do light processing in the fragment shaders

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This commit is contained in:
reo 2025-06-30 11:04:54 +03:00
parent 95070f854c
commit b793bec63a
1 changed files with 15 additions and 9 deletions
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24
src/render.rs
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@ -30,21 +30,27 @@ impl GliumRenderer {
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
uniform vec3 light_dir;
out vec3 v_color;
out vec3 v_normal;
void main() {
vec3 n = normalize(mat3(model) * normal);
float diff = max(dot(n, -light_dir), 0.0);
vec3 base = vec3(0.6, 0.6, 0.8);
v_color = base * diff + 0.1;
gl_Position = projection * view * model * vec4(position, 1.0);
mat4 modelview = view * model;
v_normal = transpose(inverse(mat3(modelview))) * normal;
gl_Position = projection * modelview * vec4(position, 1.0);
}"#;
const FRAG: &str = r#"
#version 330 core
in vec3 v_color;
in vec3 v_normal;
out vec4 color;
void main() { color = vec4(v_color, 1.0); }"#;
uniform vec3 light_dir;
void main() {
float brightness = dot(normalize(v_normal), normalize(light_dir));
vec3 dark_color = vec3(0.6, 0.0, 0.0);
vec3 regular_color = vec3(1.0, 0.0, 0.0);
color = vec4(mix(dark_color, regular_color, brightness), 1.0);
}"#;
let program = Program::from_source(&display, VERT, FRAG, None)?;