43 lines
1.2 KiB
GLSL
43 lines
1.2 KiB
GLSL
// equirectangular envmap + gradient rim
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#define RECIPROCAL_PI2 0.15915494
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#ifndef RIMSTEP
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#define RIMSTEP .5
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#endif
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#ifndef ENVFACT
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#define ENVFACT 1.
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#endif
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#ifndef RIMFACT
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#define RIMFACT 1.
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#endif
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void SetupMaterial( inout Material mat )
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{
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vec3 norm = normalize(vWorldNormal.xyz);
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vec3 eye = normalize(uCameraPos.xyz-pixelpos.xyz);
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vec3 rvec = normalize(reflect(eye,norm));
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vec2 uv = vec2(atan(rvec.z,rvec.x)*RECIPROCAL_PI2+.5,asin(rvec.y)*RECIPROCAL_PI2+.5);
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vec2 uv2 = vec2(atan(rvec.z,abs(rvec.x))*RECIPROCAL_PI2+.5,asin(rvec.y)*RECIPROCAL_PI2+.5);
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vec3 envcol = textureGrad(tex,uv,dFdx(uv2),dFdy(uv2)).rgb*ENVFACT;
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#ifdef RIM_LIGHTING
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float rim = smoothstep(RIMSTEP,1.,1.-abs(dot(eye,norm)));
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vec3 rimcol = texture(rimtex,vec2(.25+.5*rim,.5)).rgb;
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envcol = mix(envcol,rimcol,rim*RIMFACT);
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#endif
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#ifdef BARRIER_MAP
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vec3 grad = texture(bartex,vec2(0.,vTexCoord.t*5.+timer)).rgb;
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envcol = (envcol+grad)*.25;
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#endif
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mat.Base = vec4(envcol,1.);
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mat.Normal = ApplyNormalMap(vTexCoord.st);
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}
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vec4 ProcessLight( Material mat, vec4 color )
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{
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#ifdef AMBIENT_GLOW
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float glow = .75+.25*sin(timer*8);
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return vec4(vec3(glow),color.a);
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#else
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return color;
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#endif
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}
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