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/*
* Javascript/Canvas Textured 3D Renderer v0.3
* Copyright (c) 2008 Jacob Seidelin, [email protected]
* This software is free to use for non-commercial purposes. For anything else, please contact the author.
* This is a version modified by Stefano Gioffre'.
*/
Canvas3D.Vec3 = function(vx, vy, vz) {
this.x = vx;
this.y = vy;
this.z = vz;
}
Canvas3D.Vec3.prototype.set = function(vx, vy, vz) {
this.x = vx;
this.y = vy;
this.z = vz;
}
Canvas3D.Vec3.prototype.addVector = function(V) {
this.x += V.x;
this.y += V.y;
this.z += V.z;
return this;
}
Canvas3D.Vec3.prototype.multiply = function(fScalar) {
this.x *= fScalar;
this.y *= fScalar;
this.z *= fScalar;
return this;
}
Canvas3D.Vec3.prototype.subVector = function(V) {
this.x -= V.x;
this.y -= V.y;
this.z -= V.z;
return this;
}
Canvas3D.Vec3.prototype.returnAdd = function(V) {
return new Canvas3D.Vec3(this.x + V.x, this.y + V.y, this.z + V.z);
}
Canvas3D.Vec3.prototype.returnSub = function(V) {
return new Canvas3D.Vec3(this.x - V.x, this.y - V.y, this.z - V.z);
}
Canvas3D.Vec3.prototype.clone = function() {
return new Canvas3D.Vec3(this.x, this.y, this.z);
}
Canvas3D.Vec3.prototype.dot = function(V) {
return ((this.x * V.x) + (this.y * V.y) + (this.z * V.z));
}
Canvas3D.Vec3.prototype.cross = function(V) {
var vx = V.x;
var vy = V.y;
var vz = V.z;
return new Canvas3D.Vec3((this.y * vz) - (this.z * vy), (this.z * vx) - (this.x * vz), (this.x * vy) - (this.y * vx));
}
Canvas3D.Vec3.prototype.length = function() {
return Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
}
Canvas3D.Vec3.prototype.unit = function() {
var l = 1/Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
return new Canvas3D.Vec3(this.x * l, this.y * l, this.z * l);
}
Canvas3D.Vec3.prototype.rotateX = function(a) {
var ry = this.y;
var rz = this.z;
var c = Math.cos(a);
var s = Math.sin(a);
this.y = c * ry - s * rz;
this.z = s * ry + c * rz;
}
Canvas3D.Vec3.prototype.rotateY = function(a) {
var rx = this.x;
var rz = this.z;
var c = Math.cos(a);
var s = Math.sin(a);
this.x = c * rx - s * rz;
this.z = s * rx + c * rz;
}
Canvas3D.Vec3.prototype.rotateZ = function(a) {
var rx = this.x;
var ry = this.y;
var c = Math.cos(a);
var s = Math.sin(a);
this.x = c * rx - s * ry;
this.y = s * rx + c * ry;
}
Canvas3D.Vec3.prototype.dist = function(oVec) {
var x = oVec.x - this.x;
var y = oVec.y - this.y;
var z = oVec.z - this.z;
return Math.sqrt(x*x + y*y + z*z);
}
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