60 lines
1.9 KiB
GLSL
60 lines
1.9 KiB
GLSL
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// -*-C++-*-
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#version 120
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uniform sampler2D baseTexture;
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uniform float ring_factor;
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uniform float rainbow_factor;
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varying float fogFactor;
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varying float mie_frag;
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varying float eShade;
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varying vec3 hazeColor;
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vec3 filter_combined (in vec3 color) ;
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void main(void)
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{
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vec4 base = texture2D( baseTexture, gl_TexCoord[0].st);
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float fwd_enhancement = smoothstep(0.8, 1.0, mie_frag) * eShade;
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float light_intensity = length(gl_Color.rgb)/1.76;
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//22 deg ring
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float halo_ring_enhancement = smoothstep (0.88, 0.927, mie_frag) * (1.0 - smoothstep(0.927, 0.94, mie_frag)) * eShade * 1.5 * ring_factor;
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float halo_ring_enhancement_r = smoothstep (0.88, 0.90, mie_frag) * (1.0 - smoothstep(0.90, 0.92, mie_frag)) * eShade * ring_factor;
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float halo_ring_enhancement_b = smoothstep (0.91, 0.93, mie_frag) * (1.0 - smoothstep(0.93, 0.955, mie_frag)) * eShade * ring_factor;
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vec4 finalColor = base * gl_Color;
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float reduction = 0.16 * light_intensity * rainbow_factor;
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finalColor.g *= (1.0 - reduction * halo_ring_enhancement_r);
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finalColor.b *= (1.0 - reduction * halo_ring_enhancement_r);
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finalColor.r *= (1.0 - reduction * halo_ring_enhancement_b);
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finalColor.g *= (1.0 - reduction * halo_ring_enhancement_b);
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fwd_enhancement *=(1.0-smoothstep(0.8, 1.0, light_intensity));
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finalColor.rgb *= (1.0 + fwd_enhancement) * (1.0 + 0.5 * halo_ring_enhancement * (1.0-smoothstep(0.8, 1.0, light_intensity))) ;
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finalColor.a *= (1.0 + 0.5 * halo_ring_enhancement);
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finalColor.rgb = clamp(finalColor.rgb, 0.0, 1.0);
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finalColor.a = clamp(finalColor.a, 0.0, 1.0);
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vec4 fragColor = vec4 (mix(hazeColor, finalColor.rgb, fogFactor ), mix(0.0, finalColor.a, 1.0 - 0.5 * (1.0 - fogFactor)));
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fragColor.rgb = filter_combined(fragColor.rgb);
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//fragColor.rgb = vec3 (1.0, 0.0, 0.0);
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gl_FragColor = fragColor;
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}
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