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/**
* @file avatarAlphaF.glsl
*
* Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#extension GL_ARB_texture_rectangle : enable
uniform sampler2D diffuseMap;
uniform sampler2DRectShadow shadowMap0;
uniform sampler2DRectShadow shadowMap1;
uniform sampler2DRectShadow shadowMap2;
uniform sampler2DRectShadow shadowMap3;
uniform sampler2D noiseMap;
uniform mat4 shadow_matrix[6];
uniform vec4 shadow_clip;
uniform vec2 screen_res;
uniform vec2 shadow_res;
vec3 atmosLighting(vec3 light);
vec3 scaleSoftClip(vec3 light);
varying vec3 vary_ambient;
varying vec3 vary_directional;
varying vec3 vary_position;
varying vec3 vary_normal;
uniform float shadow_bias;
float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl)
{
stc.xyz /= stc.w;
stc.z += shadow_bias;
float cs = shadow2DRect(shadowMap, stc.xyz).x;
float shadow = cs;
shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(scl, scl, 0.0)).x, cs);
shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(scl, -scl, 0.0)).x, cs);
shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-scl, scl, 0.0)).x, cs);
shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-scl, -scl, 0.0)).x, cs);
return shadow/5.0;
}
void main()
{
float shadow = 1.0;
vec4 pos = vec4(vary_position, 1.0);
vec3 norm = normalize(vary_normal);
//vec3 nz = texture2D(noiseMap, gl_FragCoord.xy/128.0).xyz;
vec4 spos = pos;
if (spos.z > -shadow_clip.w)
{
vec4 lpos;
if (spos.z < -shadow_clip.z)
{
lpos = shadow_matrix[3]*spos;
lpos.xy *= shadow_res;
shadow = pcfShadow(shadowMap3, lpos, 1.5);
shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
}
else if (spos.z < -shadow_clip.y)
{
lpos = shadow_matrix[2]*spos;
lpos.xy *= shadow_res;
shadow = pcfShadow(shadowMap2, lpos, 1.5);
}
else if (spos.z < -shadow_clip.x)
{
lpos = shadow_matrix[1]*spos;
lpos.xy *= shadow_res;
shadow = pcfShadow(shadowMap1, lpos, 1.5);
}
else
{
lpos = shadow_matrix[0]*spos;
lpos.xy *= shadow_res;
shadow = pcfShadow(shadowMap0, lpos, 1.5);
}
}
vec4 col = vec4(vary_ambient + vary_directional*shadow, gl_Color.a);
vec4 color = texture2D(diffuseMap, gl_TexCoord[0].xy) * col;
color.rgb = atmosLighting(color.rgb);
color.rgb = scaleSoftClip(color.rgb);
gl_FragColor = color;
}
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