79 lines
2.3 KiB
GLSL
79 lines
2.3 KiB
GLSL
uniform sampler2D ntex;
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uniform sampler2D dtex;
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uniform sampler2DArrayShadow shadowtex;
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uniform float split0;
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uniform float split1;
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uniform float split2;
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uniform float splitmax;
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uniform float shadow_res;
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in vec2 uv;
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#ifdef GL_ES
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layout (location = 0) out vec4 Diff;
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layout (location = 1) out vec4 Spec;
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#else
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out vec4 Diff;
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out vec4 Spec;
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#endif
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#stk_include "utils/decodeNormal.frag"
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#stk_include "utils/SpecularBRDF.frag"
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#stk_include "utils/DiffuseBRDF.frag"
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#stk_include "utils/getPosFromUVDepth.frag"
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#stk_include "utils/SunMRP.frag"
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float getShadowFactor(vec3 pos, int index)
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{
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vec4 shadowcoord = (ShadowViewProjMatrixes[index] * InverseViewMatrix * vec4(pos, 1.0));
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shadowcoord.xy /= shadowcoord.w;
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vec2 shadowtexcoord = shadowcoord.xy * 0.5 + 0.5;
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float d = .5 * shadowcoord.z + .5;
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float result = 0.;
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for (float i = -1.; i <= 1.; i += 1.)
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{
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for (float j = -1.; j <= 1.; j += 1.)
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{
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// result += texture(shadowtex, vec4(shadowtexcoord + vec2(i,j) / shadow_res, float(index), d));
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// Added a hack with j+1. to avoid ugly lines
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result += texture(shadowtex, vec4(shadowtexcoord + vec2(i,j+1.) / shadow_res, float(index), d));
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}
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}
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return result / 9.;
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}
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void main() {
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vec2 uv = gl_FragCoord.xy / screen;
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float z = texture(dtex, uv).x;
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vec4 xpos = getPosFromUVDepth(vec3(uv, z), InverseProjectionMatrix);
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vec3 norm = normalize(DecodeNormal(2. * texture(ntex, uv).xy - 1.));
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float roughness =texture(ntex, uv).z;
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vec3 eyedir = -normalize(xpos.xyz);
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vec3 Lightdir = SunMRP(norm, eyedir);
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float NdotL = clamp(dot(norm, Lightdir), 0., 1.);
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vec3 Specular = SpecularBRDF(norm, eyedir, Lightdir, vec3(1.), roughness);
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vec3 Diffuse = DiffuseBRDF(norm, eyedir, Lightdir, vec3(1.), roughness);
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// Shadows
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float factor;
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if (xpos.z < split0)
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factor = getShadowFactor(xpos.xyz, 0);
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else if (xpos.z < split1)
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factor = getShadowFactor(xpos.xyz, 1);
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else if (xpos.z < split2)
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factor = getShadowFactor(xpos.xyz, 2);
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else if (xpos.z < splitmax)
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factor = getShadowFactor(xpos.xyz, 3);
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else
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factor = 1.;
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Diff = vec4(factor * NdotL * Diffuse * sun_col, 1.);
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Spec = vec4(factor * NdotL * Specular * sun_col, 1.);
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}
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