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uniform sampler3D ttt3D;
uniform float extraNoiseScale = 1.0f;
float noise3D(vec3 p)
{
return texture3D(ttt3D, p).x*2.0f - 1.0f;
}
float turbulence(vec3 p, int octaves, float lacunarity, float gain) {
float freq = 1.0f;
float amp = 0.8f;
float sum = 0.0f;
for(int i=0; i<octaves; i++) {
sum += abs(noise3D(p*freq))*amp;
freq *= lacunarity;
amp *= gain;
}
return sum;
}
float spike(float c, float w, float x) {
return smoothstep(c-w, c, x) * smoothstep(c+w, c, x);
}
vec3 myTexture3D(vec3 p)
{
float noiseScale = 0.1f*extraNoiseScale;
float noise = turbulence(p*noiseScale, 3, 3.0f, 0.5f);
//noise = turbulence(p*noiseScale + vec3(noise, noise, noise*0.3)*0.01f, 8, 3.0f, 0.5f);
//noise = spike(0.35f, 0.05f, noise);
//noise = noise;
vec3 base = lerp(vec3(164,148,108)*1.63/255, vec3(178,156,126)*1.73/255, spike(0.5f, 0.3f, turbulence(p*noiseScale*0.7f + vec3(noise*0.5, noise, noise)*0.011f, 2, 2.0f, 0.5f)));
//vec3 b2 = lerp(base, vec3(0.0f, 0.0f, 0.0f), noise);
vec3 b2 = lerp(base, vec3(173, 160, 121)*1.73/255, noise);
return b2;
}
// scene reflection
uniform float reflectionCoeff = 0.0f;
uniform float specularCoeff = 0.0f;
uniform sampler2DRect reflectionTex;
// Shadow map
uniform float shadowAmbient = 0.0;
uniform float hdrScale = 5.0;
uniform sampler2D texture;
uniform sampler2DArrayShadow stex;
uniform sampler2DArrayShadow stex2;
uniform sampler2DArrayShadow stex3;
uniform samplerCube skyboxTex;
uniform vec2 texSize; // x - size, y - 1/size
uniform vec4 far_d;
// Spot lights
uniform vec3 spotLightDir;
uniform vec3 spotLightPos;
uniform float spotLightCosineDecayBegin;
uniform float spotLightCosineDecayEnd;
uniform vec3 spotLightDir2;
uniform vec3 spotLightPos2;
uniform float spotLightCosineDecayBegin2;
uniform float spotLightCosineDecayEnd2;
uniform vec3 spotLightDir3;
uniform vec3 spotLightPos3;
uniform float spotLightCosineDecayBegin3;
uniform float spotLightCosineDecayEnd3;
uniform vec3 parallelLightDir;
uniform float shadowAdd;
uniform int useTexture;
uniform int numShadows;
uniform float roughnessScale;
uniform vec3 ambientColor;
uniform sampler2DArray diffuseTexArray;
uniform sampler2DArray bumpTexArray;
uniform sampler2DArray specularTexArray;
uniform sampler2DArray emissiveReflectSpecPowerTexArray;
float shadowCoeff1()
{
const int index = 0;
//int index = 3;
//
//if(gl_FragCoord.z < far_d.x)
// index = 0;
//else if(gl_FragCoord.z < far_d.y)
// index = 1;
//else if(gl_FragCoord.z < far_d.z)
// index = 2;
vec4 shadow_coord = gl_TextureMatrix[index]*vec4(gl_TexCoord[1].xyz, 1);
shadow_coord.w = shadow_coord.z + shadowAdd;
// tell glsl in which layer to do the look up
shadow_coord.z = float(index);
// Gaussian 3x3 filter
// return shadow2DArray(stex, shadow_coord).x;
const float X = 1.0f;
float ret = shadow2DArray(stex, shadow_coord).x * 0.25;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( -X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( -X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( -X, X)).x * 0.0625;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( 0, -X)).x * 0.125;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( 0, X)).x * 0.125;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex, shadow_coord, ivec2( X, X)).x * 0.0625;
return ret;
}
float shadowCoeff2()
{
const int index = 1;
//int index = 3;
//if(gl_FragCoord.z < far_d.x)
// index = 0;
//else if(gl_FragCoord.z < far_d.y)
// index = 1;
//else if(gl_FragCoord.z < far_d.z)
// index = 2;
vec4 shadow_coord = gl_TextureMatrix[index]*vec4(gl_TexCoord[1].xyz, 1);
shadow_coord.w = shadow_coord.z + shadowAdd;
shadow_coord.z = float(0);
// return shadow2DArray(stex, shadow_coord).x;
const float X = 1.0f;
float ret = shadow2DArray(stex2, shadow_coord).x * 0.25;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( -X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( -X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( -X, X)).x * 0.0625;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( 0, -X)).x * 0.125;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( 0, X)).x * 0.125;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex2, shadow_coord, ivec2( X, X)).x * 0.0625;
return ret;
}
float shadowCoeff3()
{
const int index = 2;
//int index = 3;
//if(gl_FragCoord.z < far_d.x)
// index = 0;
//else if(gl_FragCoord.z < far_d.y)
// index = 1;
//else if(gl_FragCoord.z < far_d.z)
// index = 2;
vec4 shadow_coord = gl_TextureMatrix[index]*vec4(gl_TexCoord[1].xyz, 1);
shadow_coord.w = shadow_coord.z + shadowAdd;
shadow_coord.z = float(0);
// return shadow2DArray(stex, shadow_coord).x;
const float X = 1.0f;
float ret = shadow2DArray(stex3, shadow_coord).x * 0.25;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( -X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( -X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( -X, X)).x * 0.0625;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( 0, -X)).x * 0.125;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( 0, X)).x * 0.125;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( X, -X)).x * 0.0625;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( X, 0)).x * 0.125;
ret += shadow2DArrayOffset(stex3, shadow_coord, ivec2( X, X)).x * 0.0625;
return ret;
}
uniform float RollOff = 0.5f;
uniform float fresnelBias = 0.0;
uniform float fresnelScale = 1.0;
uniform float fresnelPower = 3.0; // 5.0 is physically correct
void main()
{
//// TODO, expose this as user parameter
const float skyLightIntensity = 0.2;
const float rimLightIntensity = 0.3;
vec3 normal = normalize(gl_TexCoord[2].xyz);
vec3 t0 = gl_TexCoord[3].xyz;
vec3 t1 = gl_TexCoord[4].xyz;
vec3 diffuseMat;
vec3 specularMat;
vec3 bump;
vec3 emissiveReflectSpecPow;
// read in material color for diffuse, specular, bump, emmisive
if (gl_TexCoord[6].z >= 0.0f) {
// 2D texture
diffuseMat = texture2DArray(diffuseTexArray, gl_TexCoord[6].xyz).rgb;
//specularMat = texture2DArray(specularTexArray, gl_TexCoord[6].xyz).rgb; // TODO Does not seem to work
specularMat = vec3(1.0f);
bump = texture2DArray(bumpTexArray, gl_TexCoord[6].xyz).xyz;
if (dot(bump,bump) < 0.01) bump = vec3(0.5,0.5,1);
emissiveReflectSpecPow = texture2DArray(emissiveReflectSpecPowerTexArray, gl_TexCoord[6].xyz).xyz;
} else {
// 3D texture
diffuseMat = myTexture3D(gl_TexCoord[0].xyz) * vec3(0.5,0.5,0.5);//texture3D(ttt3D, gl_TexCoord[0].xyz);
specularMat = vec3(1.0);
bump = texture2D(texture, gl_TexCoord[5].xy).xyz;
if (dot(bump,bump) < 0.01) bump = vec3(0.5,0.5,1);
emissiveReflectSpecPow = vec3(0.0,0.0,0.0);
}
// apply bump to the normal
bump = (bump - vec3(0.5,0.5,0.5)) * 2.0f;
bump.xy *= roughnessScale*2;
float sc = 1.0f;
normal = normalize(t0*bump.x + t1*bump.y + sc*normal * bump.z);
//gl_FragColor.xyz = normal*0.5 + vec3(0.5,0.5,0.5);
//gl_FragColor.w = 1;
//return;
vec3 eyeVec = normalize(gl_TexCoord[1].xyz);
// apply gamma correction for diffuse textures
diffuseMat = pow(diffuseMat, 0.45);
float specularPower = emissiveReflectSpecPow.b*255.0f + 1.0f;
// TODO - fix this
specularPower = 10.0f;
float emissive = emissiveReflectSpecPow.r*10.0f;
float reflectivity = emissiveReflectSpecPow.b;
float fresnel = fresnelBias + fresnelScale*pow(1.0 - max(0.0, dot(normal, eyeVec)), fresnelPower);
float specular = 0.0f;
vec3 skyNormal = reflect(eyeVec, normal);
vec3 skyColor = skyLightIntensity * textureCube(skyboxTex, skyNormal).rgb;
vec3 ambientSkyColor = diffuseMat * skyColor;
vec3 diffuseColor = vec3(0.0, 0.0, 0.0);
if (numShadows >= 1) {
vec3 lightColor = hdrScale * vec3(1.0, 0.9, 0.9);
vec3 shadowColor = vec3(0.4, 0.4, 0.9); // colored shadow
vec3 lvec = normalize(spotLightDir);
float ldn = max(0.0f, dot(normal, lvec));
float shadowC = shadowCoeff1();
vec3 irradiance = shadowC * ldn * lightColor;
// diffuse irradiance
diffuseColor += diffuseMat * irradiance;
// add colored shadow
diffuseColor += (1.0 - shadowC) * shadowAmbient * shadowColor * diffuseMat;
vec3 r = reflect(lvec, normal);
specular += pow(max(0.0, dot(r,eyeVec)), specularPower)*shadowC;
}
// add rim light
if (numShadows >= 2) {
vec3 lightColor = rimLightIntensity * vec3(1.0, 0.9, 0.9);
vec3 lvec = normalize(spotLightDir2);
float ldn = max(0.0f, dot(normal, lvec));
vec3 irradiance = ldn * lightColor;
// diffuse irradiance
diffuseColor += diffuseMat * irradiance;
}
vec3 color = vec3(0.0, 0.0, 0.0);
color += diffuseColor;
color += ambientSkyColor;
color += specular*specularMat;
color += hdrScale * emissive * diffuseMat;
//vec3 reflectColor = diffuseMat * texture2DRect(reflectionTex, gl_FragCoord.xy).rgb;
//color = reflectionCoeff * reflectColor + (1.0f - reflectionCoeff) * color;
color = (fresnel * skyColor + (1.0 - fresnel) * color) * reflectivity + (1.0 - reflectivity) * color;
gl_FragColor.rgb = color;
gl_FragColor.w = gl_Color.w;
float fog = clamp(gl_Fog.scale*(gl_Fog.end+gl_TexCoord[1].z), 0.0, 1.0);
vec4 fogCol = gl_Fog.color;
gl_FragColor = mix(fogCol, gl_FragColor, fog);
}
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