87 lines
1.7 KiB
GLSL
87 lines
1.7 KiB
GLSL
layout(std140) uniform State
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{
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int u_alphaTest;
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float u_alphaRef;
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float u_fogStart;
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float u_fogEnd;
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float u_fogRange;
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float u_fogDisable;
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vec4 u_fogColor;
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};
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layout(std140) uniform Scene
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{
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mat4 u_proj;
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mat4 u_view;
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};
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#define MAX_LIGHTS 8
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struct Light {
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float enabled;
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float radius;
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float minusCosAngle;
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float hardSpot;
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vec4 position;
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vec4 direction;
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vec4 color;
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};
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layout(std140) uniform Object
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{
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mat4 u_world;
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vec4 u_ambLight;
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Light u_directLights[MAX_LIGHTS];
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Light u_pointLights[MAX_LIGHTS];
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Light u_spotLights[MAX_LIGHTS];
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};
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uniform vec4 u_matColor;
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uniform vec4 u_surfProps; // amb, spec, diff, extra
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#define surfAmbient (u_surfProps.x)
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#define surfSpecular (u_surfProps.y)
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#define surfDiffuse (u_surfProps.z)
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vec3 DoDirLight(Light L, vec3 N)
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{
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float l = max(0.0, dot(N, -L.direction.xyz));
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return l*L.color.rgb;
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}
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vec3 DoPointLight(Light L, vec3 V, vec3 N)
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{
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// As on PS2
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vec3 dir = V - L.position.xyz;
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float dist = length(dir);
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float atten = max(0.0, (1.0 - dist/L.radius));
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float l = max(0.0, dot(N, -normalize(dir)));
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return l*L.color.rgb*atten;
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}
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vec3 DoSpotLight(Light L, vec3 V, vec3 N)
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{
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// As on PS2
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vec3 dir = V - L.position.xyz;
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float dist = length(dir);
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float atten = max(0.0, (1.0 - dist/L.radius));
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dir /= dist;
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float l = max(0.0, dot(N, -dir));
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float pcos = dot(dir, L.direction.xyz); // cos to point
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float ccos = -L.minusCosAngle;
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float falloff = (pcos-ccos)/(1.0-ccos);
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if(falloff < 0.0) // outside of cone
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l = 0.0;
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l *= max(falloff, L.hardSpot);
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return l*L.color.xyz*atten;
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}
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float DoFog(float w)
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{
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return clamp((w - u_fogEnd)*u_fogRange, u_fogDisable, 1.0);
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}
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#define DIRECTIONALS
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#define POINTLIGHTS
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#define SPOTLIGHTS
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