38 lines
674 B
GLSL
38 lines
674 B
GLSL
uniform sampler2D tex;
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uniform float fogmax;
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uniform float startH;
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uniform float endH;
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uniform float start;
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uniform float end;
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uniform vec3 col;
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uniform mat4 ipvmat;
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uniform vec2 screen;
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#if __VERSION__ >= 130
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in vec2 uv;
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out vec4 FragColor;
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#else
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varying vec2 uv;
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#define FragColor gl_FragColor
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#endif
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void main()
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{
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vec4 color = texture(tex, uv);
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vec3 tmp = vec3(gl_FragCoord.xy / screen, gl_FragCoord.z);
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tmp = 2. * tmp - 1.;
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vec4 xpos = vec4(tmp, 1.0);
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xpos = ipvmat * xpos;
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xpos.xyz /= xpos.w;
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float dist = length(xpos.xyz);
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float fog = smoothstep(start, end, dist);
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fog = min(fog, fogmax);
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FragColor = vec4(vec4(col, 0.) * fog + color *(1. - fog));
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}
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