forked from 0ad/0ad
89 lines
2.2 KiB
GLSL
89 lines
2.2 KiB
GLSL
#version 120
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uniform sampler2D baseTex;
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uniform sampler2D losTex;
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#if USE_SHADOW
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#if USE_SHADOW_SAMPLER
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uniform sampler2DShadow shadowTex;
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#if USE_SHADOW_PCF
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uniform vec4 shadowScale;
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#endif
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#else
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uniform sampler2D shadowTex;
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#endif
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#endif
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uniform vec3 shadingColor;
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uniform vec3 ambient;
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uniform vec3 sunColor;
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uniform vec3 sunDir;
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uniform vec3 cameraPos;
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uniform float specularPower;
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uniform vec3 specularColor;
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varying vec4 v_tex;
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varying vec4 v_shadow;
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varying vec2 v_los;
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varying vec3 v_half;
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varying vec3 v_normal;
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varying float v_transp;
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varying vec3 v_lighting;
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float get_shadow()
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{
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#if USE_SHADOW && !DISABLE_RECEIVE_SHADOWS
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#if USE_SHADOW_SAMPLER
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#if USE_SHADOW_PCF
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vec2 offset = fract(v_shadow.xy - 0.5);
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vec4 size = vec4(offset + 1.0, 2.0 - offset);
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vec4 weight = (vec4(1.0, 1.0, -0.5, -0.5) + (v_shadow.xy - 0.5*offset).xyxy) * shadowScale.zwzw;
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return (1.0/9.0)*dot(size.zxzx*size.wwyy,
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vec4(shadow2D(shadowTex, vec3(weight.zw, v_shadow.z)).r,
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shadow2D(shadowTex, vec3(weight.xw, v_shadow.z)).r,
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shadow2D(shadowTex, vec3(weight.zy, v_shadow.z)).r,
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shadow2D(shadowTex, vec3(weight.xy, v_shadow.z)).r));
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#else
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return shadow2D(shadowTex, v_shadow.xyz).r;
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#endif
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#else
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if (v_shadow.z >= 1.0)
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return 1.0;
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return (v_shadow.z <= texture2D(shadowTex, v_shadow.xy).x ? 1.0 : 0.0);
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#endif
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#else
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return 1.0;
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#endif
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}
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void main()
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{
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//vec4 texdiffuse = textureGrad(baseTex, vec3(fract(v_tex.xy), v_tex.z), dFdx(v_tex.xy), dFdy(v_tex.xy));
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vec4 texdiffuse = texture2D(baseTex, fract(v_tex.xy));
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if (texdiffuse.a < 0.25)
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discard;
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texdiffuse.a *= v_transp;
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vec3 specular = sunColor * specularColor * pow(max(0.0, dot(normalize(v_normal), v_half)), specularPower);
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vec3 color = (texdiffuse.rgb * v_lighting + specular) * get_shadow();
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color += texdiffuse.rgb * ambient;
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#if !IGNORE_LOS
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float los = texture2D(losTex, v_los).a;
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los = los < 0.03 ? 0.0 : los;
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color *= los;
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#endif
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gl_FragColor.rgb = color;
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gl_FragColor.a = texdiffuse.a;
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}
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