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#version 120
#define saturate(x) clamp(x,0.0,1.0)
#define lerp mix
#define SHADOWS
#define BRANCHING
#line 36
uniform sampler2D Base;
uniform sampler2D Bump;
uniform samplerCube ShadowMap;
uniform vec3 lightColor;
uniform vec2 plxCoeffs;
uniform vec4 select;
uniform bool hasParallax;
varying vec2 texCoord;
varying vec3 lVec;
varying vec3 vVec;
varying vec3 shadowVec;
void main(){
vec3 lighting = vec3(0.0);
float atten = saturate(1.0 - dot(lVec, lVec));
#ifndef BRANCHING
atten *= float(lVec.z > 0.0);
#else
if (atten > 0.0)
if (lVec.z > 0.0)
#endif
{
#ifdef SHADOWS
# ifndef BRANCHING
atten *= float(length(shadowVec) < dot(textureCube(ShadowMap, shadowVec), select));
# else
if (length(shadowVec) < dot(textureCube(ShadowMap, shadowVec), select))
# endif
#endif
{
vec3 lightVec = normalize(lVec);
vec3 viewVec = normalize(vVec);
vec2 plxTexCoord = texCoord;
if (hasParallax){
float height = texture2D(Bump, texCoord).w;
float offset = height * plxCoeffs.x + plxCoeffs.y;
plxTexCoord += offset * viewVec.xy;
}
vec3 base = texture2D(Base, plxTexCoord).rgb;
vec3 bump = texture2D(Bump, plxTexCoord).xyz * 2.0 - 1.0;
bump = normalize(bump);
float diffuse = saturate(dot(lightVec, bump));
float specular = pow(saturate(dot(reflect(-viewVec, bump), lightVec)), 16.0);
lighting = atten * lightColor * (diffuse * base + 0.6 * specular);
}
}
gl_FragColor.rgb = lighting;
}
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