app/node_modules/@babylonjs/core/Shaders/screenSpaceReflection2.fragment.js

// Do not edit.
import { ShaderStore } from "../Engines/shaderStore.js";
import "./ShadersInclude/helperFunctions.js";
import "./ShadersInclude/pbrBRDFFunctions.js";
import "./ShadersInclude/screenSpaceRayTrace.js";
const name = "screenSpaceReflection2PixelShader";
const shader = `#if defined(WEBGL2) || defined(WEBGPU) || defined(NATIVE)
#define TEXTUREFUNC(s,c,lod) texture2DLodEXT(s,c,lod)
#define TEXTURECUBEFUNC(s,c,lod) textureLod(s,c,lod)
#else
#define TEXTUREFUNC(s,c,bias) texture2D(s,c,bias)
#define TEXTURECUBEFUNC(s,c,bias) textureCube(s,c,bias)
#endif
uniform sampler2D textureSampler;varying vec2 vUV;
#ifdef SSR_SUPPORTED
uniform sampler2D reflectivitySampler;uniform sampler2D normalSampler;uniform sampler2D depthSampler;
#ifdef SSRAYTRACE_USE_BACK_DEPTHBUFFER
uniform sampler2D backDepthSampler;uniform float backSizeFactor;
#endif
#ifdef SSR_USE_ENVIRONMENT_CUBE
uniform samplerCube envCubeSampler;
#ifdef SSR_USE_LOCAL_REFLECTIONMAP_CUBIC
uniform vec3 vReflectionPosition;uniform vec3 vReflectionSize;
#endif
#endif
uniform mat4 view;uniform mat4 invView;uniform mat4 projection;uniform mat4 invProjectionMatrix;uniform mat4 projectionPixel;uniform float nearPlaneZ;uniform float stepSize;uniform float maxSteps;uniform float strength;uniform float thickness;uniform float roughnessFactor;uniform float reflectionSpecularFalloffExponent;uniform float maxDistance;uniform float selfCollisionNumSkip;uniform float reflectivityThreshold;
#include<helperFunctions>
#include<pbrBRDFFunctions>
#include<screenSpaceRayTrace>
vec3 hash(vec3 a)
{a=fract(a*0.8);a+=dot(a,a.yxz+19.19);return fract((a.xxy+a.yxx)*a.zyx);}
float computeAttenuationForIntersection(ivec2 hitPixel,vec2 hitUV,vec3 vsRayOrigin,vec3 vsHitPoint,vec3 reflectionVector,float maxRayDistance,float numIterations) {float attenuation=1.0;
#ifdef SSR_ATTENUATE_SCREEN_BORDERS
vec2 dCoords=smoothstep(0.2,0.6,abs(vec2(0.5,0.5)-hitUV.xy));attenuation*=clamp(1.0-(dCoords.x+dCoords.y),0.0,1.0);
#endif
#ifdef SSR_ATTENUATE_INTERSECTION_DISTANCE
attenuation*=1.0-clamp(distance(vsRayOrigin,vsHitPoint)/maxRayDistance,0.0,1.0);
#endif
#ifdef SSR_ATTENUATE_INTERSECTION_NUMITERATIONS
attenuation*=1.0-(numIterations/maxSteps);
#endif
#ifdef SSR_ATTENUATE_BACKFACE_REFLECTION
vec3 reflectionNormal=texelFetch(normalSampler,hitPixel,0).xyz;float directionBasedAttenuation=smoothstep(-0.17,0.0,dot(reflectionNormal,-reflectionVector));attenuation*=directionBasedAttenuation;
#endif
return attenuation;}
#endif
void main()
{
#ifdef SSR_SUPPORTED
vec4 colorFull=TEXTUREFUNC(textureSampler,vUV,0.0);vec3 color=colorFull.rgb;vec4 reflectivity=TEXTUREFUNC(reflectivitySampler,vUV,0.0);
#ifndef SSR_DISABLE_REFLECTIVITY_TEST
if (max(reflectivity.r,max(reflectivity.g,reflectivity.b))<=reflectivityThreshold) {
#ifdef SSR_USE_BLUR
gl_FragColor=vec4(0.);
#else
gl_FragColor=colorFull;
#endif
return;}
#endif
#ifdef SSR_INPUT_IS_GAMMA_SPACE
color=toLinearSpace(color);
#endif
vec2 texSize=vec2(textureSize(depthSampler,0));vec3 csNormal=texelFetch(normalSampler,ivec2(vUV*texSize),0).xyz; 
#ifdef SSR_DECODE_NORMAL
csNormal=csNormal*2.0-1.0;
#endif
#ifdef SSR_NORMAL_IS_IN_WORLDSPACE
csNormal=(view*vec4(csNormal,0.0)).xyz;
#endif
float depth=texelFetch(depthSampler,ivec2(vUV*texSize),0).r;vec3 csPosition=computeViewPosFromUVDepth(vUV,depth,projection,invProjectionMatrix);vec3 csViewDirection=normalize(csPosition);vec3 csReflectedVector=reflect(csViewDirection,csNormal);
#ifdef SSR_USE_ENVIRONMENT_CUBE
vec3 wReflectedVector=vec3(invView*vec4(csReflectedVector,0.0));
#ifdef SSR_USE_LOCAL_REFLECTIONMAP_CUBIC
vec4 worldPos=invView*vec4(csPosition,1.0);wReflectedVector=parallaxCorrectNormal(worldPos.xyz,normalize(wReflectedVector),vReflectionSize,vReflectionPosition);
#endif
#ifdef SSR_INVERTCUBICMAP
wReflectedVector.y*=-1.0;
#endif
#ifdef SSRAYTRACE_RIGHT_HANDED_SCENE
wReflectedVector.z*=-1.0;
#endif
vec3 envColor=TEXTURECUBEFUNC(envCubeSampler,wReflectedVector,0.0).xyz;
#ifdef SSR_ENVIRONMENT_CUBE_IS_GAMMASPACE
envColor=toLinearSpace(envColor);
#endif
#else
vec3 envColor=color;
#endif
float reflectionAttenuation=1.0;bool rayHasHit=false;vec2 startPixel;vec2 hitPixel;vec3 hitPoint;float numIterations;
#ifdef SSRAYTRACE_DEBUG
vec3 debugColor;
#endif
#ifdef SSR_ATTENUATE_FACING_CAMERA
reflectionAttenuation*=1.0-smoothstep(0.25,0.5,dot(-csViewDirection,csReflectedVector));
#endif
if (reflectionAttenuation>0.0) {
#ifdef SSR_USE_BLUR
vec3 jitt=vec3(0.);
#else
float roughness=1.0-reflectivity.a;vec3 jitt=mix(vec3(0.0),hash(csPosition)-vec3(0.5),roughness)*roughnessFactor; 
#endif
vec2 uv2=vUV*texSize;float c=(uv2.x+uv2.y)*0.25;float jitter=mod(c,1.0); 
rayHasHit=traceScreenSpaceRay1(
csPosition,
normalize(csReflectedVector+jitt),
projectionPixel,
depthSampler,
texSize,
#ifdef SSRAYTRACE_USE_BACK_DEPTHBUFFER
backDepthSampler,
backSizeFactor,
#endif
thickness,
nearPlaneZ,
stepSize,
jitter,
maxSteps,
maxDistance,
selfCollisionNumSkip,
startPixel,
hitPixel,
hitPoint,
numIterations
#ifdef SSRAYTRACE_DEBUG
,debugColor
#endif
);}
#ifdef SSRAYTRACE_DEBUG
gl_FragColor=vec4(debugColor,1.);return;
#endif
vec3 F0=reflectivity.rgb;vec3 fresnel=fresnelSchlickGGX(max(dot(csNormal,-csViewDirection),0.0),F0,vec3(1.));vec3 SSR=envColor;if (rayHasHit) {vec3 reflectedColor=texelFetch(textureSampler,ivec2(hitPixel),0).rgb;
#ifdef SSR_INPUT_IS_GAMMA_SPACE
reflectedColor=toLinearSpace(reflectedColor);
#endif
reflectionAttenuation*=computeAttenuationForIntersection(ivec2(hitPixel),hitPixel/texSize,csPosition,hitPoint,csReflectedVector,maxDistance,numIterations);SSR=reflectedColor*reflectionAttenuation+(1.0-reflectionAttenuation)*envColor;}
#ifndef SSR_BLEND_WITH_FRESNEL
SSR*=fresnel;
#endif
#ifdef SSR_USE_BLUR
float blur_radius=0.0;float roughness=1.0-reflectivity.a*(1.0-roughnessFactor);if (roughness>0.001) {float cone_angle=min(roughness,0.999)*3.14159265*0.5;float cone_len=distance(startPixel,hitPixel);float op_len=2.0*tan(cone_angle)*cone_len; 
float a=op_len;float h=cone_len;float a2=a*a;float fh2=4.0f*h*h;blur_radius=(a*(sqrt(a2+fh2)-a))/(4.0f*h);}
gl_FragColor=vec4(SSR,blur_radius/255.0); 
#else
#ifdef SSR_BLEND_WITH_FRESNEL
vec3 reflectionMultiplier=clamp(pow(fresnel*strength,vec3(reflectionSpecularFalloffExponent)),0.0,1.0);
#else
vec3 reflectionMultiplier=clamp(pow(reflectivity.rgb*strength,vec3(reflectionSpecularFalloffExponent)),0.0,1.0);
#endif
vec3 colorMultiplier=1.0-reflectionMultiplier;vec3 finalColor=(color*colorMultiplier)+(SSR*reflectionMultiplier);
#ifdef SSR_OUTPUT_IS_GAMMA_SPACE
finalColor=toGammaSpace(finalColor);
#endif
gl_FragColor=vec4(finalColor,colorFull.a);
#endif
#else
gl_FragColor=TEXTUREFUNC(textureSampler,vUV,0.0);
#endif
}
`;
// Sideeffect
ShaderStore.ShadersStore[name] = shader;
/** @internal */
export const screenSpaceReflection2PixelShader = { name, shader };
//# sourceMappingURL=screenSpaceReflection2.fragment.js.map