CLASS MATRIX3D.AS - BASIC, POUR AIDER A COMPRENDRE

dans matrix3d.as:
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class matrix3d {
	var polygons:Array;
	var points:Array;
	//
	// Constructor
	function matrix3d() {
		polygons = new Array();
		points = new Array();
	}
	//
	// register a new point
	function registerPoint(x:Number, y:Number, z:Number) {
		var temp:Array = new Array();
		var i:Number;
		for (i=1; i<4; i++) {
			temp[i] = new Array();
		}
		temp[1][1] = x;
		temp[2][1] = y;
		temp[3][1] = z;
		return temp;
	}
	//
	// register a new polygon -> 3 points
	function registerPolygon(pt1:Array, pt2:Array, pt3:Array) {
		polygons.push({pt1:pt1, pt2:pt2, pt3:pt3});
	}
	//
	//
	function mtxMutiply(matriceA, matriceB) {
		var i, j, k:Number;
		var temp:Array = new Array();
		for (i=1; i<4; i++) {
			temp[i] = new Array();
		}
		for (i=1; i<=3; i++) {
			temp[i][1] = 0;
			for (j=1; j<=3; j++) {
				for (k=1; k<=3; k++) {
					temp[i][j] += matriceA[i][k]*matriceB[k][j];
				}
			}
		}
		return temp;
	}
	//
	//
	function getRotationMatrix_x(radian:Number) {
		var rx:Array = new Array();
		var i:Number;
		for (i=1; i<4; i++) {
			rx[i] = new Array();
		}
		rx[1][1] = 1;
		rx[1][2] = 0;
		rx[1][3] = 0;
		rx[2][1] = 0;
		rx[2][2] = Math.cos(radian);
		rx[2][3] = -Math.sin(radian);
		rx[3][1] = 0;
		rx[3][2] = Math.sin(radian);
		rx[3][3] = Math.cos(radian);
		return rx;
	}
	//
	//
	function rotate_x(radian:Number) {
		var i:Number;
		for (i=0; i<=polygons.length-1; i++) {
			polygons[i].pt1 = mtxMutiply(getRotationMatrix_x(radian), polygons[i].pt1);
			polygons[i].pt2 = mtxMutiply(getRotationMatrix_x(radian), polygons[i].pt2);
			polygons[i].pt3 = mtxMutiply(getRotationMatrix_x(radian), polygons[i].pt3);
		}
		return true;
	}
	//
	//
	function drawMatrix(cible:MovieClip, cOption:Object) {
		var i:Number;
		cible.lineStyle(cOption.lineStyle.thickness, cOption.lineStyle.color, cOption.lineStyle.alpha);
		for (i=0; i<=polygons.length-1; i++) {
			cible.beginFill(cOption.fillStyle.color, cOption.fillStyle.alpha);
			cible.moveTo(polygons[i].pt1[1][1], polygons[i].pt1[2][1]);
			cible.lineTo(polygons[i].pt2[1][1], polygons[i].pt2[2][1]);
			cible.lineTo(polygons[i].pt3[1][1], polygons[i].pt3[2][1]);
			cible.lineTo(polygons[i].pt1[1][1], polygons[i].pt1[2][1]);
			cible.endFill();
		}
	}
}