class CascadeShadow

package h3d.shader

extends Shader

@:directlyUsed@:src({ @:extends h3d.shader.ShadowSampling; var pixelColor:Vec4; @global var camera:{ var view : Mat4}; @const var enable:Bool; @const(2) var SAMPLING_MODE:Int; @const var DEBUG:Bool; @const var BLEND:Bool; @param var shadowPower:Float; @param var pcfScale:Float; var transformedPosition:Vec3; var shadow:Float; var dirShadow:Float; @param var cascadeShadowMaps:Sampler2DArray; @param var cascadeScales:Array<Vec4,MAX_CASCADE_COUNT>; @param var cascadeOffsets:Array<Vec4,MAX_CASCADE_COUNT>; @param var cascadeDebugs:Array<Vec4,MAX_CASCADE_COUNT>; @param var cascadeCount:Int; @param var cascadeViewProj:Mat3x4; @param var cascadeTransitionFraction:Float; function fragment() { if (enable) { var shadowValue = 1.0; var color = vec3(0); var viewZ = (transformedPosition * camera.view.mat3x4()).z; var shouldContinue = true; @unroll for (i in 0 ... MAX_CASCADE_COUNT) if (i < cascadeCount) { if (shouldContinue && viewZ <= cascadeScales[i].w) { shouldContinue = false; var shadowPos0 = transformedPosition * cascadeViewProj; var shadowPos = (i == 0) ? shadowPos0 : cascadeShadowPos(shadowPos0, cascadeScales[i].xyz, cascadeOffsets[i].xyz); shadowValue = sampleCascadeArray(cascadeShadowMaps, i, shadowPos, 0.0, pcfScale, shadowPower, transformedPosition, SAMPLING_MODE); color = cascadeDebugs[i].rgb; if (BLEND) { var blendFactor = cascadeBlendFactor(viewZ, cascadeScales[i].w, cascadeTransitionFraction); if (blendFactor > 0.0) { if (i < MAX_CASCADE_COUNT - 1 && i < cascadeCount - 1) { var nextShadowPos = cascadeShadowPos(shadowPos0, cascadeScales[i + 1].xyz, cascadeOffsets[i + 1].xyz); var nextShadow = sampleCascadeArray(cascadeShadowMaps, i + 1, nextShadowPos, 0.0, pcfScale, shadowPower, transformedPosition, SAMPLING_MODE); shadowValue = nextShadow * blendFactor + shadowValue * (1 - blendFactor); var nextColor = cascadeDebugs[i + 1].rgb; color = nextColor * blendFactor + color * (1 - blendFactor); } else { shadowValue = blendFactor + shadowValue * (1 - blendFactor); color = color * (1 - blendFactor); }; }; }; }; }; if (DEBUG) pixelColor = vec4(color, 1.0) else { shadow = shadowValue; dirShadow = shadow; }; }; }; })@:build(hxsl.Macros.buildShader())@:autoBuild(hxsl.Macros.buildShader())