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[require]
GLSL >= 1.20
[vertex shader]
#version 120
#extension GL_ARB_texture_rectangle : enable
#define flat
#define texture2DRectOffset(sampler, coords, offset) texture2DRect(sampler, coords + vec2(offset))
#define shadow2DRectOffset(sampler, coords, offset) shadow2DRect(sampler, coords + vec2(offset))
attribute vec4 vvertex;
uniform mat4 lightmatrix;
void main(void)
{
gl_Position = lightmatrix * vvertex;
}
[fragment shader]
#version 120
#extension GL_ARB_texture_rectangle : enable
#define flat
#define texture2DRectOffset(sampler, coords, offset) texture2DRect(sampler, coords + vec2(offset))
#define shadow2DRectOffset(sampler, coords, offset) shadow2DRect(sampler, coords + vec2(offset))
#define fragdata(loc, name, type)
#define fragcolor gl_FragData[0]
uniform sampler2DRect tex0, tex1, tex3 , tex2;
uniform sampler2DRectShadow tex4;
uniform vec3 splitcenter[3];
uniform vec3 splitbounds[3];
uniform vec3 splitscale[3];
uniform vec3 splitoffset[3];
uniform mat3 csmmatrix;
uniform vec3 sunlightdir;
uniform vec3 sunlightcolor;
uniform vec3 skylightcolor;
uniform float giscale, rhnudge;
uniform vec4 rhbb[2];
uniform vec3 rhscale[2];
uniform vec3 rhoffset[2];
uniform sampler3D tex6, tex7, tex8, tex9;
uniform vec3 camera;
uniform mat4 worldmatrix;
uniform vec4 fogdir;
uniform vec3 fogcolor;
uniform vec2 fogdensity;
uniform vec4 radialfogscale;
uniform vec2 shadowatlasscale;
uniform vec4 lightscale;
uniform sampler2DRect tex5; uniform vec2 aoscale; uniform vec4 aoparams;
uniform vec3 gdepthscale;
uniform vec3 gdepthunpackparams;
fragdata(0, fragcolor, vec4)
#define shadowval(center, xoff, yoff) float(shadow2DRect(tex4, center + vec3(xoff, yoff, 0.0)))
float filtershadow(vec3 shadowtc)
{
vec2 offset = fract(shadowtc.xy - 0.5);
vec3 center = shadowtc;
center.xy -= offset*0.5;
vec4 size = vec4(offset + 1.0, 2.0 - offset);
return (1.0/9.0)*dot(size.zxzx*size.wwyy,
vec4(shadowval(center, -0.5, -0.5),
shadowval(center, 1.0, -0.5),
shadowval(center, -0.5, 1.0),
shadowval(center, 1.0, 1.0)));
}
vec3 getcsmtc(vec3 pos, float distbias)
{
pos = csmmatrix * pos;
pos.z -= distbias;
if(all(lessThan(abs(pos - splitcenter[0]), splitbounds[0])))
pos = pos*splitscale[0] + splitoffset[0];
else
if(all(lessThan(abs(pos - splitcenter[1]), splitbounds[1])))
pos = pos*splitscale[1] + splitoffset[1];
else
if(all(lessThan(abs(pos.xy - splitcenter[2].xy), splitbounds[2].xy)))
pos = pos*splitscale[2] + splitoffset[2];
else pos = vec3(-1.0);
return pos;
}
vec4 getrhlight(vec3 pos, vec3 norm)
{
vec3 tc;
pos += norm*rhnudge;
if(all(lessThan(abs(pos - rhbb[0].xyz), vec3(rhbb[0].w))))
tc = pos*rhscale[0] + rhoffset[0];
else
if(all(lessThan(abs(pos - rhbb[1].xyz), vec3(rhbb[1].w))))
tc = pos*rhscale[1] + rhoffset[1];
else
tc = vec3(-1.0);
vec4 shr = texture3D(tex6, tc), shg = texture3D(tex7, tc), shb = texture3D(tex8, tc), sha = texture3D(tex9, tc);
shr.rgb -= 0.5;
shg.rgb -= 0.5;
shb.rgb -= 0.5;
sha.rgb -= 0.5;
vec4 basis = vec4(norm*-(1.023326*0.488603/3.14159*2.0), (0.886226*0.282095/3.14159));
return clamp(vec4(dot(basis, shr), dot(basis, shg), dot(basis, shb), min(dot(basis, sha), norm.z + 1.0)), 0.0, 1.0);
}
void main(void)
{
#define gfetch(sampler, coords) texture2DRect(sampler, coords)
#define accumlight(light) fragcolor.rgb = light
#define accumalpha(alpha) fragcolor.a = alpha
vec4 normal = gfetch(tex1, gl_FragCoord.xy);
normal.xyz = normal.xyz*2.0 - 1.0;
#define alpha normal.a
vec4 diffuse = gfetch(tex0, gl_FragCoord.xy);
vec3 glow = gfetch(tex2, gl_FragCoord.xy).rgb;
#define depthvals gfetch(tex3, gl_FragCoord.xy)
float depth = depthvals.r;
vec4 pos = worldmatrix * vec4(gl_FragCoord.xy, depth, 1.0);
pos.xyz /= pos.w;
float fogcoord = length(camera - pos.xyz);
vec3 light = lightscale.rgb;
vec4 rhlight = getrhlight(pos.xyz, normal.xyz);
light += rhlight.a * skylightcolor;
light *= diffuse.rgb;
float ao = texture2DRect(tex5, gl_FragCoord.xy*aoscale).r;
light *= aoparams.x + ao*aoparams.y;
light += glow * lightscale.a;
vec3 sunlight = rhlight.rgb * giscale * diffuse.rgb;
float sunfacing = dot(sunlightdir, normal.xyz);
if(sunfacing > 0.0)
{
#define distbias 0.0
vec3 csmtc = getcsmtc(pos.xyz, distbias);
float sunoccluded = sunfacing * filtershadow(csmtc);
vec3 camdir = normalize(camera - pos.xyz);
float facing = 2.0*dot(normal.xyz, camdir);
float sunspec = pow(clamp(sunfacing*facing - dot(camdir, sunlightdir), 0.0, 1.0), 16.0) * diffuse.a;
sunlight += (diffuse.rgb + sunspec) * sunoccluded;
}
sunlight *= aoparams.z + ao*aoparams.w;
light += sunlight * sunlightcolor;
float foglerp = clamp(exp2(fogcoord*fogdensity.x)*fogdensity.y, 0.0, 1.0);
accumlight(mix(fogcolor*alpha, light, foglerp));
accumalpha(alpha);
}
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