class Indirect

package h3d.shader.pbr

extends PropsDefinition › Shader

import h3d.shader.pbr.Lighting

@:directlyUsed@:src({ @:import h3d.shader.pbr.BDRF; @const var drawIndirectDiffuse:Bool; @const var drawIndirectSpecular:Bool; @const var showSky:Bool; @const var skyColor:Bool; @param var irrLut:Sampler2D; @param var irrDiffuse:SamplerCube; @param var irrSpecular:SamplerCube; @param var irrSpecularLevels:Float; @param var irrPower:Float; @param var irrRotation:Vec2; @param var skyMap:SamplerCube; @param var skyHdrMax:Float; @const var gammaCorrect:Bool; @param var cameraInvViewProj:Mat4; @param var skyColorValue:Vec3; @param var emissivePower:Float; var calculatedUV:Vec2; function rotateNormal(n:Vec3):Vec3 { return vec3(n.x * irrRotation.x - n.y * irrRotation.y, n.x * irrRotation.y + n.y * irrRotation.x, n.z); }; function getEnvSpecular(normal:Vec3, roughness:Float):Vec3 { return irrSpecular.textureLod(rotateNormal(normal), roughness * irrSpecularLevels).rgb; }; function getEnvDiffuse(normal:Vec3):Vec3 { return irrDiffuse.get(rotateNormal(normal)).rgb; }; function fragment() { var isSky = normal.dot(normal) <= 0; if (isSky) { if (showSky) { var color:Vec3; if (skyColor) { color = skyColorValue; if (gammaCorrect) color *= color; } else { var normal = (vec3(uvToScreen(calculatedUV), 1.) * cameraInvViewProj.mat3x4()).normalize(); color = skyMap.get(rotateNormal(normal)).rgb; color = min(color, skyHdrMax); if (gammaCorrect) color *= color; color *= irrPower; }; pixelColor.rgb += color; } else discard; } else { var diffuse = vec3(0.); var specular = vec3(0.); var F0 = pbrSpecularColor; var F = F0 + (max(vec3(1 - roughness), F0) - F0) * exp2((-5.55473 * NdV - 6.98316) * NdV); if (drawIndirectDiffuse) { diffuse = getEnvDiffuse(normal) * albedo; }; if (drawIndirectSpecular) { var reflectVec = reflect(-view, normal); var envSpec = getEnvSpecular(reflectVec, roughness); var envBRDF = irrLut.get(vec2(roughness, NdV)); specular = envSpec * (F * envBRDF.x + envBRDF.y); }; var indirect = (diffuse * (1 - metalness) * (1 - F) + specular) * irrPower; pixelColor.rgb += indirect * occlusion + albedo * emissive * emissivePower; }; }; })@:build(hxsl.Macros.buildShader())@:autoBuild(hxsl.Macros.buildShader())