135 lines
4.5 KiB
C
135 lines
4.5 KiB
C
// -*- mode: C; -*-
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// Licence: GPL v2
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// © Emilian Huminiuc and Vivian Meazza 2011
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#version 120
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varying vec3 rawpos;
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varying vec3 VNormal;
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varying vec3 VTangent;
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varying vec3 VBinormal;
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varying vec3 vViewVec;
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varying vec3 reflVec;
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varying vec4 Diffuse;
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varying float alpha;
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//varying float fogCoord;
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uniform samplerCube Environment;
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uniform sampler2D Rainbow;
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uniform sampler2D BaseTex;
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uniform sampler2D Fresnel;
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uniform sampler2D Map;
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uniform sampler2D NormalTex;
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uniform sampler3D Noise;
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uniform float spec_adjust;
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uniform float rainbowiness;
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uniform float fresneliness;
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uniform float noisiness;
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uniform float ambient_correction;
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uniform float normalmap_dds;
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//uniform int fogType;
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////fog "include" /////
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uniform int fogType;
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vec3 fog_Func(vec3 color, int type);
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//////////////////////
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float getShadowing();
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void main (void)
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{
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//vec3 halfV;
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//float NdotL, NdotHV;
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vec4 texel = texture2D(BaseTex, gl_TexCoord[0].st);
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vec4 nmap = texture2D(NormalTex, gl_TexCoord[0].st * 8.0);
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vec4 map = texture2D(Map, gl_TexCoord[0].st * 8.0);
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vec4 specNoise = texture3D(Noise, rawpos.xyz * 0.0045);
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vec4 noisevec = texture3D(Noise, rawpos.xyz);
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vec3 lightDir = gl_LightSource[0].position.xyz;
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vec3 halfVector = gl_LightSource[0].halfVector.xyz;
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vec3 N;
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float pf;
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N = nmap.rgb * 2.0 - 1.0;
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N = normalize(N.x * VTangent + N.y * VBinormal + N.z * VNormal);
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if (normalmap_dds > 0)
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N = -N;
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float lightness = dot(texel.rgb, vec3( 0.3, 0.59, 0.11 ));
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// calculate the specular light
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float refl_correction = spec_adjust * 2.5 - 1.0;
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float shininess = max (0.35, refl_correction);
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float nDotVP = max(0.0, dot(N, normalize(gl_LightSource[0].position.xyz)));
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float nDotHV = max(0.0, dot(N, normalize(gl_LightSource[0].halfVector.xyz)));
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if (nDotVP == 0.0)
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pf = 0.0;
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else
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pf = pow(nDotHV, /*gl_FrontMaterial.*/shininess);
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float shadowmap = getShadowing();
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vec4 Diffuse = gl_LightSource[0].diffuse * nDotVP * shadowmap;
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//vec4 Specular = vec4(vec3(0.5*shininess), 1.0)* gl_LightSource[0].specular * pf;
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vec4 Specular = vec4(1.0)* lightness * gl_LightSource[0].specular * pf * shadowmap;
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vec4 color = gl_Color + Diffuse * gl_FrontMaterial.diffuse;
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//color += Specular * vec4(vec3(0.5*shininess), 1.0) * nmap.a;
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float nFactor = 1.0 - N.z;
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color += Specular * vec4(1.0) * nmap.a * nFactor;
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color.a = texel.a * alpha;
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color = clamp(color, 0.0, 1.0);
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vec3 viewVec = normalize(vViewVec);
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// Map a rainbowish color
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float v = abs(dot(viewVec, normalize(VNormal)));
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vec4 rainbow = texture2D(Rainbow, vec2(v, 0.0));
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// Map a fresnel effect
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vec4 fresnel = texture2D(Fresnel, vec2(v, 0.0));
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// map the refection of the environment
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vec4 reflection = textureCube(Environment, reflVec * dot(N,VNormal));
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// set the user shininess offset
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float transparency_offset = clamp(refl_correction, -1.0, 1.0);
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float reflFactor = 0.0;
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float MixFactor = specNoise.r * specNoise.g * specNoise.b * 350.0;
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MixFactor = 0.75 * smoothstep(0.0, 1.0, MixFactor);
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reflFactor = max(map.a * (texel.r + texel.g), 1.0 - MixFactor) * (1.0- N.z) + transparency_offset ;
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reflFactor =0.75 * smoothstep(0.05, 1.0, reflFactor);
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// set ambient adjustment to remove bluiness with user input
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float ambient_offset = clamp(ambient_correction, -1.0, 1.0);
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vec4 ambient_Correction = vec4(gl_LightSource[0].ambient.rg, gl_LightSource[0].ambient.b * 0.6, 0.5) * ambient_offset ;
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ambient_Correction = clamp(ambient_Correction, -1.0, 1.0);
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// add fringing fresnel and rainbow effects and modulate by reflection
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vec4 reflcolor = mix(reflection, rainbow, rainbowiness * v);
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reflcolor += Specular * nmap.a * nFactor;
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vec4 reflfrescolor = mix(reflcolor, fresnel, fresneliness * v);
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vec4 noisecolor = mix(reflfrescolor, noisevec, noisiness);
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vec4 raincolor = vec4(noisecolor.rgb * reflFactor, 1.0);
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raincolor += Specular * nmap.a * nFactor;
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vec4 mixedcolor = mix(texel, raincolor * (1.0 - refl_correction * (1.0 - lightness)), reflFactor); //* (1.0 - 0.5 * transparency_offset )
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// the final reflection
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vec4 fragColor = vec4(color.rgb * mixedcolor.rgb + ambient_Correction.rgb * (1.0 - refl_correction * (1.0 - 0.8 * lightness)) * nFactor, color.a);
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fragColor += Specular * nmap.a * nFactor;
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fragColor.rgb = fog_Func(fragColor.rgb, fogType);
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gl_FragColor = fragColor;
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}
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