webgl-matrix-v1.0.min.js

var Matrix=function(a1,b1,c1,d1,a2,b2,c2,d2,a3,b3,c3,d3,a4,b4,c4,d4){this.id="matrix4x4";if(arguments.length!==16&&arguments.length!==1){console.error("ERROR: Incorrect number of arguments at matrix4x4.");return!1}
if(typeof arguments[0]==="number"){this.value=new Float32Array(16);this.value[0]=a1;this.value[1]=b1;this.value[2]=c1;this.value[3]=d1;this.value[4]=a2;this.value[5]=b2;this.value[6]=c2;this.value[7]=d2;this.value[8]=a3;this.value[9]=b3;this.value[10]=c3;this.value[11]=d3;this.value[12]=a4;this.value[13]=b4;this.value[14]=c4;this.value[15]=d4}else{this.value=arguments[0]}
return this};Matrix.prototype.add=function(matrix){for(let i=0;i<this.value.length;i++){this.value[i]+=matrix.value[i]}
return this.value};Matrix.prototype.sub=function(matrix){for(let i=0;i<this.value.length;i++){this.value[i]-=matrix.value[i]}
return this.value};Matrix.prototype.xScalar=function(scalar){for(let i=0;i<this.value.length;i++){this.value[i]*=scalar}
return this.value};Matrix.prototype.xMatrix=function(matrix){var product=new Float32Array(16);for(let i=0;i<4;i++){for(let j=0;j<4;j++){product[(i<<2)+j]=this.value[i*4+0]*matrix.value[j+0]+this.value[i*4+1]*matrix.value[j+4]+this.value[i*4+2]*matrix.value[j+8]+this.value[i*4+3]*matrix.value[j+12]}}
this.value=product;return this.value};Matrix.identity=function(){var identity=new Matrix(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return identity};Matrix.rotateX=function(angle){let rotation=new Float32Array(16);for(let i=0;i<16;i++){rotation[i]=0}
rotation[0]=1;rotation[5]=Math.cos(angle);rotation[6]=Math.sin(angle);rotation[9]=-Math.sin(angle);rotation[10]=Math.cos(angle);rotation[15]=1;return new Matrix(rotation)};Matrix.rotateY=function(angle){let rotation=new Float32Array(16);for(let i=0;i<16;i++){rotation[i]=0}
rotation[0]=Math.cos(angle);rotation[2]=Math.sin(angle);rotation[5]=1;rotation[8]=-Math.sin(angle);rotation[10]=Math.cos(angle);rotation[15]=1;return new Matrix(rotation)};Matrix.rotateZ=function(angle){let rotation=new Float32Array(16);for(let i=0;i<16;i++){rotation[i]=0}
rotation[0]=Math.cos(angle);rotation[1]=-Math.sin(angle);rotation[4]=Math.sin(angle);rotation[5]=Math.cos(angle);rotation[10]=1;rotation[15]=1;return new Matrix(rotation)};Matrix.rotate=function(x,y,z){let rotation=new Float32Array(16);let cz=Math.cos(z),cy=Math.cos(y),cx=Math.cos(x),sz=Math.sin(z),sy=Math.sin(y),sx=Math.sin(x);rotation[0]=cz*cy;rotation[1]=cz*sy*sx-sz*cx;rotation[2]=cz*sy*cx+sz*sx;rotation[3]=0;rotation[4]=sz*cy;rotation[5]=sz*sy*sx+cz*cx;rotation[6]=sz*sy*cx-cz*sx
rotation[7]=0;rotation[8]=-sy;rotation[9]=cy*sx;rotation[10]=cy*cx;rotation[11]=0;rotation[12]=0;rotation[13]=0;rotation[14]=0;rotation[15]=1;return new Matrix(rotation)};Matrix.translate=function(x,y,z){let translation=new Float32Array(16);for(let i=0;i<16;i++){translation[i]=0}
translation[0]=1;translation[5]=1;translation[10]=1;translation[15]=1;translation[12]=x;translation[13]=y;translation[14]=z;return new Matrix(translation)};Matrix.projection=function(fovy,aspect,zMin,zMax){fovy=Math.max(0,Math.min(fovy,Math.PI))||Math.PI/4;zMin=Math.max(zMin,1/(1<<16))||0.1;zMax=Math.min(zMax,1*(1<<16))||1000;aspect=aspect||1;let projection=new Float32Array(16);for(let i=0;i<16;i++){projection[i]=0}
projection[0]=1.0/Math.tan(fovy/2)/aspect;projection[5]=1.0/Math.tan(fovy/2);projection[11]=-1;projection[10]=(zMax+zMin)/(zMin-zMax);projection[14]=(zMax*zMin)/(zMin-zMax)*2;return new Matrix(projection)};Matrix.lookAt=function(location,looking,up){let lookAt=new Float32Array(16);let magnitude=0;if(Math.abs(location.x-looking.x)<0.0001&&Math.abs(location.y-looking.y)<0.0001&&Math.abs(location.z-looking.z)<0.0001){return Matrix.identity()}
let forward={x:location.x-looking.x,y:location.y-looking.y,z:location.z-looking.z,};magnitude=Math.hypot(forward.x,forward.y,forward.z);forward.x/=magnitude;forward.y/=magnitude;forward.z/=magnitude;let right={x:up.y*forward.z-up.z*forward.y,y:up.z*forward.x-up.x*forward.z,z:up.x*forward.y-up.y*forward.x,};magnitude=Math.hypot(right.x,right.y,right.z);if(!magnitude){right.x*=0;right.y*=0;right.z*=0}else{right.x/=magnitude;right.y/=magnitude;right.z/=magnitude}
let north={x:forward.y*right.z-forward.z*right.y,y:forward.z*right.x-forward.x*right.z,z:forward.x*right.y-forward.y*right.x,};magnitude=Math.hypot(north.x,north.y,north.z);if(!magnitude){north.x*=0;north.y*=0;north.z*=0}else{north.x/=magnitude;north.y/=magnitude;north.z/=magnitude}
lookAt[0]=right.x;lookAt[1]=north.x;lookAt[2]=forward.x;lookAt[3]=0;lookAt[4]=right.y;lookAt[5]=north.y;lookAt[6]=forward.y;lookAt[7]=0;lookAt[8]=right.z;lookAt[9]=north.z;lookAt[10]=forward.z;lookAt[11]=0;lookAt[12]=-(right.x*location.x+right.y*location.y+right.z*location.z);lookAt[13]=-(north.x*location.x+north.y*location.y+north.z*location.z);lookAt[14]=-(forward.x*location.x+forward.y*location.y+forward.z*location.z);lookAt[15]=1;return new Matrix(lookAt)};Matrix.xVector=function(vector,matrix){let result={x:0,y:0,z:0,};result.x=vector.x*matrix[0]+vector.y*matrix[4]+vector.z*matrix[8]+matrix[12];result.y=vector.x*matrix[1]+vector.y*matrix[5]+vector.z*matrix[9]+matrix[13];result.z=vector.x*matrix[2]+vector.y*matrix[6]+vector.z*matrix[10]+matrix[14];vector=result;return result}