import {Matrix3DUtils}			from "../geom/Matrix3DUtils";
import {Vector3D}					from "../geom/Vector3D";
import {ProjectionBase}			from "../projections/ProjectionBase";

export class OrthographicOffCenterProjection extends ProjectionBase
{

	private _minX:number;
	private _maxX:number;
	private _minY:number;
	private _maxY:number;

	constructor(minX:number, maxX:number, minY:number, maxY:number)
	{
		super();
		this._minX = minX;
		this._maxX = maxX;
		this._minY = minY;
		this._maxY = maxY;
	}

	public get minX():number
	{
		return this._minX;
	}

	public set minX(value:number)
	{
		this._minX = value;
		this.pInvalidateMatrix();
	}

	public get maxX():number
	{
		return this._maxX;
	}

	public set maxX(value:number)
	{
		this._maxX = value;
		this.pInvalidateMatrix();
	}

	public get minY():number
	{
		return this._minY;
	}

	public set minY(value:number)
	{
		this._minY = value;
		this.pInvalidateMatrix();
	}

	public get maxY():number
	{
		return this._maxY;
	}

	public set maxY(value:number)
	{
		this._maxY = value;
		this.pInvalidateMatrix();
	}

	//@override
	public unproject(nX:number, nY:number, sZ:number):Vector3D
	{
		var v:Vector3D = new Vector3D(nX, -nY, sZ, 1.0);
		v = this.unprojectionMatrix.transformVector(v);
		//z is unaffected by transform
		v.z = sZ;

		return v;
	}

	//@override
	public clone():ProjectionBase
	{
		var clone:OrthographicOffCenterProjection = new OrthographicOffCenterProjection(this._minX, this._maxX, this._minY, this._maxY);
		clone._pNear = this._pNear;
		clone._pFar = this._pFar;
		clone._pAspectRatio = this._pAspectRatio;
		return clone;
	}

	//@override
	public pUpdateMatrix():void
	{
		var raw:Float32Array = Matrix3DUtils.RAW_DATA_CONTAINER;
		var w:number = 1/(this._maxX - this._minX);
		var h:number = 1/(this._maxY - this._minY);
		var d:number = 1/(this._pFar - this._pNear);

		raw[0] = 2*w;
		raw[5] = 2*h;
		raw[10] = d;
		raw[12] = -(this._maxX + this._minX)*w;
		raw[13] = -(this._maxY + this._minY)*h;
		raw[14] = -this._pNear*d;
		raw[15] = 1;
		raw[1] = raw[2] = raw[3] = raw[4] = raw[6] = raw[7] = raw[8] = raw[9] = raw[11] = 0;
		this._pMatrix.copyRawDataFrom(raw);

		this._pFrustumCorners[0] = this._pFrustumCorners[9] = this._pFrustumCorners[12] = this._pFrustumCorners[21] = this._minX;
		this._pFrustumCorners[3] = this._pFrustumCorners[6] = this._pFrustumCorners[15] = this._pFrustumCorners[18] = this._maxX;
		this._pFrustumCorners[1] = this._pFrustumCorners[4] = this._pFrustumCorners[13] = this._pFrustumCorners[16] = this._minY;
		this._pFrustumCorners[7] = this._pFrustumCorners[10] = this._pFrustumCorners[19] = this._pFrustumCorners[22] = this._maxY;
		this._pFrustumCorners[2] = this._pFrustumCorners[5] = this._pFrustumCorners[8] = this._pFrustumCorners[11] = this._pNear;
		this._pFrustumCorners[14] = this._pFrustumCorners[17] = this._pFrustumCorners[20] = this._pFrustumCorners[23] = this._pFar;

		this._pMatrixInvalid = false;
	}
}