// -------------------
// 3D Matrix Class
// -------------------
//Matrix3Dconstructor
//------------------
functionmatrix3D(){
this.element=newArray();
this.createBase();
this.vCount=0;
}
//Basecreation
//-------------
matrix3D.prototype.createBase=function(){
this.base=newArray();
this.base[1]=newArray(1,0,0);
this.base[2]=newArray(0,1,0);
this.base[3]=newArray(0,0,1);
}
//Addingavector
//---------------
matrix3D.prototype.addVector=function(x,y,z){
this.vCount++;
this.element[this.vCount]=newArray();
this.element[this.vCount][1]=x;
this.element[this.vCount][2]=y;
this.element[this.vCount][3]=z;
}
//Deletingavector
//---------------
matrix3D.prototype.delVector=function(index,count){
if(!count)count=1;
this.element.splice(index,count);
this.vCount-=count;
}
//Gettinganelement’svalue
//--------------------------
matrix3D.prototype.get=function(row,column){
return(this.element[row][column]);
}
//Settinganelement’svalue
//--------------------------
matrix3D.prototype.set=function(row,column,arg){
this.element[row][column]=arg;
}
//RotationaroundtheXaxis
//--------------------------
//Itmultiplicateseachvector(dotmultiplication)bythetransformationmatrix:
//
//100
//0cos?-sin?
//0sin?cos?
//
//So,itwillresultthematrixtransformedby:
//
//x’=x
//y’=(cos?)*y-(sin?)*z
//z’=(sin?)*y+(cos?)*z
//
matrix3D.prototype.Xrotation=function(beta){
for(variVector=1;iVector<=this.vCount;iVector++){
this.element[iVector][2]=((Math.cos(beta))*this.element[iVector][2])-((Math.sin(beta))*this.element[iVector][3]);
this.element[iVector][3]=((Math.sin(beta))*this.element[iVector][2])+((Math.cos(beta))*this.element[iVector][3]);
}
}
//RotationaroundtheYaxis
//--------------------------
//TransformationMatrix:
//
//cos?0sin?
//010
//-sin?0cos?
//
matrix3D.prototype.Yrotation=function(beta){
for(variVector=1;iVector<=this.vCount;iVector++){
this.element[iVector][1]=((Math.cos(beta))*this.element[iVector][1])+((Math.sin(beta))*this.element[iVector][3]);
this.element[iVector][3]=(-(Math.sin(beta))*this.element[iVector][1])+((Math.cos(beta))*this.element[iVector][3]);
}
}
//RotationaroundtheZaxis
//--------------------------
//TransformationMatrix:
//
//cos?-sin?0
//sin?cos?0
//001
//
matrix3D.prototype.Zrotation=function(beta){
for(variVector=1;iVector<=this.vCount;iVector++){
this.element[iVector][1]=((Math.cos(beta))*this.element[iVector][1])-((Math.sin(beta))*this.element[iVector][2]);
this.element[iVector][2]=((Math.sin(beta))*this.element[iVector][1])+((Math.cos(beta))*this.element[iVector][2]);
}
}
//BaseTranslation
//----------------
matrix3D.prototype.translate=function(x,y,z){
this.base[1]=newArray(x,0,0);
this.base[2]=newArray(0,y,0);
this.base[3]=newArray(0,0,z);
}