class PointShadow

package h3d.shader

extends Shader

@:directlyUsed@:src({ @const var enable:Bool; @const var USE_ESM:Bool; @param var shadowPower:Float; @const var USE_PCF:Bool; @const var pcfQuality:Int; @param var pcfScale:Float; @param var shadowMap:SamplerCube; @param var lightPos:Vec3; @param var shadowBias:Float; @param var zFar:Float; var transformedPosition:Vec3; var shadow:Float; var pointShadow:Float; function fragment() { if (enable) { if (USE_PCF) { shadow = 1.0; var posToLight = transformedPosition.xyz - lightPos; var dir = normalize(posToLight.xyz); var zMax = length(posToLight); if (zFar < zMax) shadow = 1.0 else { var sampleCount = 0; switch (pcfQuality) { case 1: sampleCount = 1; case 2: sampleCount = 2; case 3: sampleCount = 4; }; var samplePerDim = sampleCount * 2 + 1; var totalSample = samplePerDim * samplePerDim * samplePerDim; var sampleStrength = 1.0 / totalSample; for (i in -sampleCount ... sampleCount + 1) { for (j in -sampleCount ... sampleCount + 1) { for (k in -sampleCount ... sampleCount + 1) { var offset = vec3(i, j, k) * pcfScale; var depth = shadowMap.getLod(dir + offset, 0).r * zFar; if (zMax - shadowBias > depth) shadow -= sampleStrength; }; }; }; }; } else if (USE_ESM) { var posToLight = transformedPosition.xyz - lightPos; var dir = normalize(posToLight.xyz); var depth = shadowMap.getLod(dir, 0).r * zFar; var zMax = length(posToLight); var delta = (depth + shadowBias).min(zMax) - zMax; shadow = exp(shadowPower * delta).saturate(); } else { var posToLight = transformedPosition.xyz - lightPos; var dir = normalize(posToLight.xyz); var depth = shadowMap.getLod(dir, 0).r * zFar; var zMax = length(posToLight); shadow = zMax - shadowBias > depth ? 0 : 1; }; }; pointShadow = shadow; }; })@:build(hxsl.Macros.buildShader())@:autoBuild(hxsl.Macros.buildShader())