playcanvas/build/playcanvas/src/scene/shader-lib/chunks/lit/frag/pass-forward/litForwardBackend.js

PlayCanvas WebGL game engine

var litForwardBackendPS = '\nvoid evaluateBackend() {\n	#ifdef LIT_SSAO\n		litArgs_ao *= texture2DLod(ssaoTexture, gl_FragCoord.xy * ssaoTextureSizeInv, 0.0).r;\n	#endif\n	#ifdef LIT_NEEDS_NORMAL\n		#ifdef LIT_SPECULAR\n			getReflDir(litArgs_worldNormal, dViewDirW, litArgs_gloss, dTBN);\n		#endif\n		#ifdef LIT_CLEARCOAT\n			ccReflDirW = normalize(-reflect(dViewDirW, litArgs_clearcoat_worldNormal));\n		#endif\n	#endif\n	#ifdef LIT_SPECULAR_OR_REFLECTION\n		#ifdef LIT_METALNESS\n			float f0 = 1.0 / litArgs_ior; f0 = (f0 - 1.0) / (f0 + 1.0); f0 *= f0;\n			litArgs_specularity = getSpecularModulate(litArgs_specularity, litArgs_albedo, litArgs_metalness, f0);\n			litArgs_albedo = getAlbedoModulate(litArgs_albedo, litArgs_metalness);\n		#endif\n		#ifdef LIT_IRIDESCENCE\n			vec3 iridescenceFresnel = getIridescence(saturate(dot(dViewDirW, litArgs_worldNormal)), litArgs_specularity, litArgs_iridescence_thickness);\n		#endif\n	#endif\n	#ifdef LIT_ADD_AMBIENT\n		addAmbient(litArgs_worldNormal);\n		#ifdef LIT_SPECULAR\n			dDiffuseLight = dDiffuseLight * (1.0 - litArgs_specularity);\n		#endif\n		#ifdef LIT_SEPARATE_AMBIENT\n			vec3 dAmbientLight = dDiffuseLight;\n			dDiffuseLight = vec3(0);\n		#endif\n	#endif\n	#ifndef LIT_OLD_AMBIENT\n		dDiffuseLight *= material_ambient;\n	#endif\n	#ifdef LIT_AO\n		#ifndef LIT_OCCLUDE_DIRECT\n			occludeDiffuse(litArgs_ao);\n		#endif\n	#endif\n	#ifdef LIT_LIGHTMAP\n		addLightMap(\n			litArgs_lightmap, \n			litArgs_lightmapDir, \n			litArgs_worldNormal, \n			dViewDirW, \n			dReflDirW, \n			litArgs_gloss, \n			litArgs_specularity, \n			dVertexNormalW,\n			dTBN\n		#if defined(LIT_IRIDESCENCE)\n			, iridescenceFresnel,\n			litArgs_iridescence_intensity\n		#endif\n		);\n	#endif\n	#ifdef LIT_LIGHTING || LIT_REFLECTIONS\n		#ifdef LIT_REFLECTIONS\n			#ifdef LIT_CLEARCOAT\n				addReflectionCC(ccReflDirW, litArgs_clearcoat_gloss);\n			\n				#ifdef LIT_SPECULAR_FRESNEL\n					ccFresnel = getFresnelCC(dot(dViewDirW, litArgs_clearcoat_worldNormal));\n					ccReflection.rgb *= ccFresnel;\n				#else\n					ccFresnel = 0.0;\n				#endif\n			#endif\n			#ifdef LIT_SPECULARITY_FACTOR\n				ccReflection.rgb *= litArgs_specularityFactor;\n			#endif\n			#ifdef LIT_SHEEN\n				addReflectionSheen(litArgs_worldNormal, dViewDirW, litArgs_sheen_gloss);\n			#endif\n			addReflection(dReflDirW, litArgs_gloss);\n			#ifdef LIT_FRESNEL_MODEL\n				dReflection.rgb *= getFresnel(\n					dot(dViewDirW, litArgs_worldNormal), \n					litArgs_gloss, \n					litArgs_specularity\n				#if defined(LIT_IRIDESCENCE)\n					, iridescenceFresnel,\n					litArgs_iridescence_intensity\n				#endif\n					);\n			#else\n				dReflection.rgb *= litArgs_specularity;\n			#endif\n			#ifdef LIT_SPECULARITY_FACTOR\n				dReflection.rgb *= litArgs_specularityFactor;\n			#endif\n		#endif\n		#ifdef AREA_LIGHTS\n			dSpecularLight *= litArgs_specularity;\n			#ifdef LIT_SPECULAR\n				calcLTCLightValues(litArgs_gloss, litArgs_worldNormal, dViewDirW, litArgs_specularity, litArgs_clearcoat_gloss, litArgs_clearcoat_worldNormal, litArgs_clearcoat_specularity);\n			#endif\n		#endif\n		\n		#include "lightEvaluationPS, LIGHT_COUNT"\n		#ifdef LIT_CLUSTERED_LIGHTS\n			addClusteredLights(litArgs_worldNormal, dViewDirW, dReflDirW,\n				#if defined(LIT_CLEARCOAT)\n						ccReflDirW,\n				#endif\n						litArgs_gloss, litArgs_specularity, dVertexNormalW, dTBN, \n				#if defined(LIT_IRIDESCENCE)\n						iridescenceFresnel,\n				#endif\n						litArgs_clearcoat_worldNormal, litArgs_clearcoat_gloss, litArgs_sheen_gloss, litArgs_iridescence_intensity\n			);\n		#endif\n		#ifdef AREA_LIGHTS\n			#ifdef LIT_CLEARCOAT\n				litArgs_clearcoat_specularity = 1.0;\n			#endif\n			#ifdef LIT_SPECULAR\n				litArgs_specularity = vec3(1);\n			#endif\n		#endif\n		#ifdef LIT_REFRACTION\n			addRefraction(\n				litArgs_worldNormal, \n				dViewDirW, \n				litArgs_thickness, \n				litArgs_gloss, \n				litArgs_specularity, \n				litArgs_albedo, \n				litArgs_transmission,\n				litArgs_ior,\n				litArgs_dispersion\n				#if defined(LIT_IRIDESCENCE)\n					, iridescenceFresnel, \n					litArgs_iridescence_intensity\n				#endif\n			);\n		#endif\n	#endif\n	#ifdef LIT_AO\n		#ifdef LIT_OCCLUDE_DIRECT\n			occludeDiffuse(litArgs_ao);\n		#endif\n		#if LIT_OCCLUDE_SPECULAR != NONE\n			occludeSpecular(litArgs_gloss, litArgs_ao, litArgs_worldNormal, dViewDirW);\n		#endif\n	#endif\n	#ifdef LIT_SPECULARITY_FACTOR\n		dSpecularLight *= litArgs_specularityFactor;\n	#endif\n	#if !defined(LIT_OPACITY_FADES_SPECULAR)\n		#if LIT_BLEND_TYPE == NORMAL || LIT_BLEND_TYPE == PREMULTIPLIED\n			float specLum = dot((dSpecularLight + dReflection.rgb * dReflection.a), vec3( 0.2126, 0.7152, 0.0722 ));\n			#ifdef LIT_CLEARCOAT\n				specLum += dot(ccSpecularLight * litArgs_clearcoat_specularity + ccReflection.rgb * litArgs_clearcoat_specularity, vec3( 0.2126, 0.7152, 0.0722 ));\n			#endif\n			litArgs_opacity = clamp(litArgs_opacity + gammaCorrectInput(specLum), 0.0, 1.0);\n		#endif\n		litArgs_opacity *= material_alphaFade;\n	#endif\n	#include "endPS"\n	#include "outputAlphaPS"\n	#ifdef LIT_MSDF\n		gl_FragColor = applyMsdf(gl_FragColor);\n	#endif\n	#include "outputPS"\n	#include "debugOutputPS"\n	#ifdef LIT_SHADOW_CATCHER\n		gl_FragColor.rgb = vec3(dShadowCatcher);\n	#endif\n}\n';

export { litForwardBackendPS as default };