Initial project import

node_modules/three-stdlib/shaders/SSRShader.cjs

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+"use strict";
+Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
+const THREE = require("three");
+const SSRShader = {
+  defines: {
+    MAX_STEP: 0,
+    isPerspectiveCamera: true,
+    isDistanceAttenuation: true,
+    isFresnel: true,
+    isInfiniteThick: false,
+    isSelective: false
+  },
+  uniforms: {
+    tDiffuse: { value: null },
+    tNormal: { value: null },
+    tMetalness: { value: null },
+    tDepth: { value: null },
+    cameraNear: { value: null },
+    cameraFar: { value: null },
+    resolution: { value: /* @__PURE__ */ new THREE.Vector2() },
+    cameraProjectionMatrix: { value: /* @__PURE__ */ new THREE.Matrix4() },
+    cameraInverseProjectionMatrix: { value: /* @__PURE__ */ new THREE.Matrix4() },
+    opacity: { value: 0.5 },
+    maxDistance: { value: 180 },
+    cameraRange: { value: 0 },
+    surfDist: { value: 7e-3 },
+    thickTolerance: { value: 0.03 }
+  },
+  vertexShader: (
+    /* glsl */
+    `
+
+    varying vec2 vUv;
+
+    void main() {
+
+			vUv = uv;
+
+			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+    }
+
+  `
+  ),
+  fragmentShader: (
+    /* glsl */
+    `
+		// precision highp float;
+		precision highp sampler2D;
+		varying vec2 vUv;
+		uniform sampler2D tDepth;
+		uniform sampler2D tNormal;
+		uniform sampler2D tMetalness;
+		uniform sampler2D tDiffuse;
+		uniform float cameraRange;
+		uniform vec2 resolution;
+		uniform float opacity;
+		uniform float cameraNear;
+		uniform float cameraFar;
+		uniform float maxDistance;
+		uniform float surfDist;
+		uniform mat4 cameraProjectionMatrix;
+		uniform mat4 cameraInverseProjectionMatrix;
+		uniform float thickTolerance;
+		#include <packing>
+		float pointToLineDistance(vec3 x0, vec3 x1, vec3 x2) {
+			//x0: point, x1: linePointA, x2: linePointB
+			//https://mathworld.wolfram.com/Point-LineDistance3-Dimensional.html
+			return length(cross(x0-x1,x0-x2))/length(x2-x1);
+		}
+		float pointPlaneDistance(vec3 point,vec3 planePoint,vec3 planeNormal){
+			// https://mathworld.wolfram.com/Point-PlaneDistance.html
+			//// https://en.wikipedia.org/wiki/Plane_(geometry)
+			//// http://paulbourke.net/geometry/pointlineplane/
+			float a=planeNormal.x,b=planeNormal.y,c=planeNormal.z;
+			float x0=point.x,y0=point.y,z0=point.z;
+			float x=planePoint.x,y=planePoint.y,z=planePoint.z;
+			float d=-(a*x+b*y+c*z);
+			float distance=(a*x0+b*y0+c*z0+d)/sqrt(a*a+b*b+c*c);
+			return distance;
+		}
+		float getDepth( const in vec2 uv ) {
+			return texture2D( tDepth, uv ).x;
+		}
+		float getViewZ( const in float depth ) {
+			#ifdef isPerspectiveCamera
+				return perspectiveDepthToViewZ( depth, cameraNear, cameraFar );
+			#else
+				return orthographicDepthToViewZ( depth, cameraNear, cameraFar );
+			#endif
+		}
+		vec3 getViewPosition( const in vec2 uv, const in float depth/*clip space*/, const in float clipW ) {
+			vec4 clipPosition = vec4( ( vec3( uv, depth ) - 0.5 ) * 2.0, 1.0 );//ndc
+			clipPosition *= clipW; //clip
+			return ( cameraInverseProjectionMatrix * clipPosition ).xyz;//view
+		}
+		vec3 getViewNormal( const in vec2 uv ) {
+			return unpackRGBToNormal( texture2D( tNormal, uv ).xyz );
+		}
+		vec2 viewPositionToXY(vec3 viewPosition){
+			vec2 xy;
+			vec4 clip=cameraProjectionMatrix*vec4(viewPosition,1);
+			xy=clip.xy;//clip
+			float clipW=clip.w;
+			xy/=clipW;//NDC
+			xy=(xy+1.)/2.;//uv
+			xy*=resolution;//screen
+			return xy;
+		}
+		void main(){
+			#ifdef isSelective
+				float metalness=texture2D(tMetalness,vUv).r;
+				if(metalness==0.) return;
+			#endif
+
+			float depth = getDepth( vUv );
+			float viewZ = getViewZ( depth );
+			if(-viewZ>=cameraFar) return;
+
+			float clipW = cameraProjectionMatrix[2][3] * viewZ+cameraProjectionMatrix[3][3];
+			vec3 viewPosition=getViewPosition( vUv, depth, clipW );
+
+			vec2 d0=gl_FragCoord.xy;
+			vec2 d1;
+
+			vec3 viewNormal=getViewNormal( vUv );
+
+			#ifdef isPerspectiveCamera
+				vec3 viewIncidenceDir=normalize(viewPosition);
+				vec3 viewReflectDir=reflect(viewIncidenceDir,viewNormal);
+			#else
+				vec3 viewIncidenceDir=vec3(0,0,-1);
+				vec3 viewReflectDir=reflect(viewIncidenceDir,viewNormal);
+			#endif
+
+			float maxReflectRayLen=maxDistance/dot(-viewIncidenceDir,viewNormal);
+			// dot(a,b)==length(a)*length(b)*cos(theta) // https://www.mathsisfun.com/algebra/vectors-dot-product.html
+			// if(a.isNormalized&&b.isNormalized) dot(a,b)==cos(theta)
+			// maxDistance/maxReflectRayLen=cos(theta)
+			// maxDistance/maxReflectRayLen==dot(a,b)
+			// maxReflectRayLen==maxDistance/dot(a,b)
+
+			vec3 d1viewPosition=viewPosition+viewReflectDir*maxReflectRayLen;
+			#ifdef isPerspectiveCamera
+				if(d1viewPosition.z>-cameraNear){
+					//https://tutorial.math.lamar.edu/Classes/CalcIII/EqnsOfLines.aspx
+					float t=(-cameraNear-viewPosition.z)/viewReflectDir.z;
+					d1viewPosition=viewPosition+viewReflectDir*t;
+				}
+			#endif
+			d1=viewPositionToXY(d1viewPosition);
+
+			float totalLen=length(d1-d0);
+			float xLen=d1.x-d0.x;
+			float yLen=d1.y-d0.y;
+			float totalStep=max(abs(xLen),abs(yLen));
+			float xSpan=xLen/totalStep;
+			float ySpan=yLen/totalStep;
+			for(float i=0.;i<MAX_STEP;i++){
+				if(i>=totalStep) break;
+				vec2 xy=vec2(d0.x+i*xSpan,d0.y+i*ySpan);
+				if(xy.x<0.||xy.x>resolution.x||xy.y<0.||xy.y>resolution.y) break;
+				float s=length(xy-d0)/totalLen;
+				vec2 uv=xy/resolution;
+
+				float d = getDepth(uv);
+				float vZ = getViewZ( d );
+				if(-vZ>=cameraFar) continue;
+				float cW = cameraProjectionMatrix[2][3] * vZ+cameraProjectionMatrix[3][3];
+				vec3 vP=getViewPosition( uv, d, cW );
+
+				#ifdef isPerspectiveCamera
+					// https://www.comp.nus.edu.sg/~lowkl/publications/lowk_persp_interp_techrep.pdf
+					float recipVPZ=1./viewPosition.z;
+					float viewReflectRayZ=1./(recipVPZ+s*(1./d1viewPosition.z-recipVPZ));
+					float sD=surfDist*cW;
+				#else
+					float viewReflectRayZ=viewPosition.z+s*(d1viewPosition.z-viewPosition.z);
+					float sD=surfDist;
+				#endif
+				if(viewReflectRayZ-sD>vZ) continue;
+
+				#ifdef isInfiniteThick
+					if(viewReflectRayZ+thickTolerance*clipW<vP.z) break;
+				#endif
+				float away=pointToLineDistance(vP,viewPosition,d1viewPosition);
+
+				float op=opacity;
+
+				if(away<sD){
+					vec3 vN=getViewNormal( uv );
+					if(dot(viewReflectDir,vN)>=0.) continue;
+					float distance=pointPlaneDistance(vP,viewPosition,viewNormal);
+					if(distance>maxDistance) break;
+					#ifdef isDistanceAttenuation
+						float ratio=1.-(distance/maxDistance);
+						float attenuation=ratio*ratio;
+						op=opacity*attenuation;
+					#endif
+					#ifdef isFresnel
+						float fresnel=(dot(viewIncidenceDir,viewReflectDir)+1.)/2.;
+						op*=fresnel;
+					#endif
+					vec4 reflectColor=texture2D(tDiffuse,uv);
+					gl_FragColor.xyz=reflectColor.xyz;
+					gl_FragColor.a=op;
+					break;
+				}
+			}
+		}
+	`
+  )
+};
+const SSRDepthShader = {
+  defines: {
+    PERSPECTIVE_CAMERA: 1
+  },
+  uniforms: {
+    tDepth: { value: null },
+    cameraNear: { value: null },
+    cameraFar: { value: null }
+  },
+  vertexShader: (
+    /* glsl */
+    `
+
+    varying vec2 vUv;
+
+    void main() {
+
+    	vUv = uv;
+    	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+    }
+
+  `
+  ),
+  fragmentShader: (
+    /* glsl */
+    `
+
+    uniform sampler2D tDepth;
+
+    uniform float cameraNear;
+    uniform float cameraFar;
+
+    varying vec2 vUv;
+
+    #include <packing>
+
+		float getLinearDepth( const in vec2 uv ) {
+
+			#if PERSPECTIVE_CAMERA == 1
+
+				float fragCoordZ = texture2D( tDepth, uv ).x;
+				float viewZ = perspectiveDepthToViewZ( fragCoordZ, cameraNear, cameraFar );
+				return viewZToOrthographicDepth( viewZ, cameraNear, cameraFar );
+
+			#else
+
+				return texture2D( tDepth, uv ).x;
+
+			#endif
+
+		}
+
+    void main() {
+
+    	float depth = getLinearDepth( vUv );
+			float d = 1.0 - depth;
+			// d=(d-.999)*1000.;
+    	gl_FragColor = vec4( vec3( d ), 1.0 );
+
+    }
+
+  `
+  )
+};
+const SSRBlurShader = {
+  uniforms: {
+    tDiffuse: { value: null },
+    resolution: { value: /* @__PURE__ */ new THREE.Vector2() },
+    opacity: { value: 0.5 }
+  },
+  vertexShader: (
+    /* glsl */
+    `
+
+    varying vec2 vUv;
+
+    void main() {
+
+    	vUv = uv;
+    	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+    }
+
+  `
+  ),
+  fragmentShader: (
+    /* glsl */
+    `
+
+    uniform sampler2D tDiffuse;
+    uniform vec2 resolution;
+    varying vec2 vUv;
+    void main() {
+			//reverse engineering from PhotoShop blur filter, then change coefficient
+
+    	vec2 texelSize = ( 1.0 / resolution );
+
+			vec4 c=texture2D(tDiffuse,vUv);
+
+			vec2 offset;
+
+			offset=(vec2(-1,0))*texelSize;
+			vec4 cl=texture2D(tDiffuse,vUv+offset);
+
+			offset=(vec2(1,0))*texelSize;
+			vec4 cr=texture2D(tDiffuse,vUv+offset);
+
+			offset=(vec2(0,-1))*texelSize;
+			vec4 cb=texture2D(tDiffuse,vUv+offset);
+
+			offset=(vec2(0,1))*texelSize;
+			vec4 ct=texture2D(tDiffuse,vUv+offset);
+
+			// float coeCenter=.5;
+			// float coeSide=.125;
+			float coeCenter=.2;
+			float coeSide=.2;
+			float a=c.a*coeCenter+cl.a*coeSide+cr.a*coeSide+cb.a*coeSide+ct.a*coeSide;
+			vec3 rgb=(c.rgb*c.a*coeCenter+cl.rgb*cl.a*coeSide+cr.rgb*cr.a*coeSide+cb.rgb*cb.a*coeSide+ct.rgb*ct.a*coeSide)/a;
+			gl_FragColor=vec4(rgb,a);
+
+		}
+	`
+  )
+};
+exports.SSRBlurShader = SSRBlurShader;
+exports.SSRDepthShader = SSRDepthShader;
+exports.SSRShader = SSRShader;
+//# sourceMappingURL=SSRShader.cjs.map