54 lines
1.5 KiB
GLSL
54 lines
1.5 KiB
GLSL
#version 450
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layout (constant_id = 0) const float alpha_test_threshold = 0.;
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layout (constant_id = 1) const uint max_dlights = 1;
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layout(set=1,binding=0) uniform sampler2D sTexture0;
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layout(set=2,binding=0) uniform sampler2D sLightmap;
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struct Light {
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vec4 pos_r;
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vec4 color;
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};
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layout(set=3,binding=0) uniform UBO {
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uint num_lights;
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Light lights[max_dlights];
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} ubo;
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layout(location=0) in vec3 vPos;
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layout(location=1) in vec3 vNormal;
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layout(location=2) in vec2 vTexture0;
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layout(location=3) in vec2 vLightmapUV;
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layout(location=4) in vec4 vColor;
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layout(location=0) out vec4 outColor;
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// FIXME what should this be?
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const float dlight_attenuation_const = 5000.;
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void main() {
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outColor = vec4(0.);
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const vec4 tex_color = texture(sTexture0, vTexture0);
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// TODO make sure textures are premultiplied alpha
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const vec4 baseColor = vColor * tex_color;
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if (baseColor.a < alpha_test_threshold)
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discard;
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outColor.a = baseColor.a;
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outColor.rgb += baseColor.rgb * texture(sLightmap, vLightmapUV).rgb;
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for (uint i = 0; i < ubo.num_lights; ++i) {
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const vec4 light_pos_r = ubo.lights[i].pos_r;
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const vec3 light_dir = light_pos_r.xyz - vPos;
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const vec3 light_color = ubo.lights[i].color.rgb;
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const float d2 = dot(light_dir, light_dir);
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const float r2 = light_pos_r.w * light_pos_r.w;
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const float attenuation = dlight_attenuation_const / (d2 + r2 * .5);
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outColor.rgb += baseColor.rgb * light_color * max(0., dot(normalize(light_dir), vNormal)) * attenuation;
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}
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//outColor.rgb = vNormal * .5 + .5;
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}
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