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https://github.com/OPM/ResInsight.git
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37 lines
1.0 KiB
GLSL
37 lines
1.0 KiB
GLSL
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varying vec3 v_ecPosition;
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vec4 srcFragment();
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vec4 lightFragment(vec4 srcFragColor, float shadowFactor);
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//--------------------------------------------------------------------------------------------------
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/// Fragment Shader - Points rendered as spheres with diffuse lighting
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//--------------------------------------------------------------------------------------------------
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void main()
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{
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//const vec3 ecLightPosition = vec3(0.5, 5.0, 7.0);
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//vec3 lightDir = normalize(ecLightPosition - v_ecPosition);
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const vec3 lightDir = vec3(0, 0, 1);
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// Calculate normal from texture coordinates
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vec3 N;
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N.xy = gl_PointCoord.st*vec2(2.0, -2.0) + vec2(-1.0, 1.0);
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float mag = dot(N.xy, N.xy);
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// Kill pixels outside circle
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if (mag > 1) discard;
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N.z = sqrt(1 - mag);
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// Calculate diffuse lighting
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float diffuse = max(0.0, dot(lightDir, N));
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vec4 color = srcFragment();
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gl_FragColor = vec4(color.rgb*diffuse, color.a);
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//gl_FragDepth = gl_FragCoord.z - 15.0*(1-mag);
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}
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