app/node_modules/@babylonjs/core/Shaders/gaussianSplatting.vertex.js

// Do not edit.
import { ShaderStore } from "../Engines/shaderStore.js";
import "./ShadersInclude/gaussianSplattingVertexDeclaration.js";
import "./ShadersInclude/gaussianSplattingUboDeclaration.js";
import "./ShadersInclude/clipPlaneVertexDeclaration.js";
import "./ShadersInclude/fogVertexDeclaration.js";
import "./ShadersInclude/logDepthDeclaration.js";
import "./ShadersInclude/clipPlaneVertex.js";
import "./ShadersInclude/fogVertex.js";
import "./ShadersInclude/logDepthVertex.js";
const name = "gaussianSplattingVertexShader";
const shader = `#include<__decl__gaussianSplattingVertex>
#ifdef LOGARITHMICDEPTH
#extension GL_EXT_frag_depth : enable
#endif
#include<clipPlaneVertexDeclaration>
#include<fogVertexDeclaration>
#include<logDepthDeclaration>
attribute vec2 position;attribute float splatIndex;uniform vec2 viewport;uniform vec2 dataTextureSize;uniform vec2 focal;uniform sampler2D covariancesATexture;uniform sampler2D covariancesBTexture;uniform sampler2D centersTexture;uniform sampler2D colorsTexture;varying vec4 vColor;varying vec2 vPosition;
#if !defined(WEBGL2) && !defined(WEBGPU) && !defined(NATIVE)
mat3 transpose(mat3 matrix) {return mat3(matrix[0][0],matrix[1][0],matrix[2][0],
matrix[0][1],matrix[1][1],matrix[2][1],
matrix[0][2],matrix[1][2],matrix[2][2]);}
#endif
vec2 getDataUV(float index,vec2 textureSize) {float y=floor(index/textureSize.x);float x=index-y*textureSize.x;return vec2((x+0.5)/textureSize.x,(y+0.5)/textureSize.y);}
void main () {vec2 splatUV=getDataUV(splatIndex,dataTextureSize);vec3 center=texture2D(centersTexture,splatUV).xyz;vec4 color=texture2D(colorsTexture,splatUV);vec3 covA=texture2D(covariancesATexture,splatUV).xyz;vec3 covB=texture2D(covariancesBTexture,splatUV).xyz;vec4 worldPos=world*vec4(center,1.0);mat4 modelView=view*world;vec4 camspace=view*worldPos;vec4 pos2d=projection*camspace;float bounds=1.2*pos2d.w;if (pos2d.z<-pos2d.w || pos2d.x<-bounds || pos2d.x>bounds
|| pos2d.y<-bounds || pos2d.y>bounds) {gl_Position=vec4(0.0,0.0,2.0,1.0);return;}
mat3 Vrk=mat3(
covA.x,covA.y,covA.z,
covA.y,covB.x,covB.y,
covA.z,covB.y,covB.z
);mat3 J=mat3(
focal.x/camspace.z,0.,-(focal.x*camspace.x)/(camspace.z*camspace.z),
0.,focal.y/camspace.z,-(focal.y*camspace.y)/(camspace.z*camspace.z),
0.,0.,0.
);mat3 invy=mat3(1,0,0,0,-1,0,0,0,1);mat3 T=invy*transpose(mat3(modelView))*J;mat3 cov2d=transpose(T)*Vrk*T;float mid=(cov2d[0][0]+cov2d[1][1])/2.0;float radius=length(vec2((cov2d[0][0]-cov2d[1][1])/2.0,cov2d[0][1]));float lambda1=mid+radius,lambda2=mid-radius;if (lambda2<0.0) return;vec2 diagonalVector=normalize(vec2(cov2d[0][1],lambda1-cov2d[0][0]));vec2 majorAxis=min(sqrt(2.0*lambda1),1024.0)*diagonalVector;vec2 minorAxis=min(sqrt(2.0*lambda2),1024.0)*vec2(diagonalVector.y,-diagonalVector.x);vColor=color;vPosition=position;vec2 vCenter=vec2(pos2d);gl_Position=vec4(
vCenter 
+ (position.x*majorAxis*1./viewport 
+ position.y*minorAxis*1./viewport)*pos2d.w,pos2d.zw);
#include<clipPlaneVertex>
#include<fogVertex>
#include<logDepthVertex>
}
`;
// Sideeffect
ShaderStore.ShadersStore[name] = shader;
/** @internal */
export const gaussianSplattingVertexShader = { name, shader };
//# sourceMappingURL=gaussianSplatting.vertex.js.map