立方体を上下左右に回す
ここまでくれば，
第1は，
スクリプト3 3次元空間で上下左右に回す立方体の4面にテクスチャマッピング
// フレームアクション
var nUnit:Number = 100 / 2;
var mySprite:Sprite = new Sprite();
var myTexture:BitmapData = new Image();
var vertices:Vector.<Number> = new Vector.<Number>();
var indices:Vector.<int> = new Vector.<int>();
var uvtData:Vector.<Number> = new Vector.<Number>();
var nDeceleration:Number = 0.3;
var myGraphics:Graphics = mySprite.graphics;
var myPerspective:PerspectiveProjection = transform.perspectiveProjection;
var worldMatrix3D:Matrix3D = new Matrix3D();
var viewMatrix3D:Matrix3D = myPerspective.toMatrix3D();
var nFaces:uint = 4;
var faces:Vector.<Vector.<uint>> = new Vector.<Vector.<uint>>();
var centers:Vector.<Vector3D> = new Vector.<Vector3D>();
faces.push(new <uint>[0, 1, 2, 3]);
faces.push(new <uint>[1, 5, 6, 2]);
faces.push(new <uint>[5, 4, 7, 6]);
faces.push(new <uint>[4, 8, 9, 7]);
centers.push(new Vector3D(0, 0, -nUnit));
centers.push(new Vector3D(nUnit, 0, 0));
centers.push(new Vector3D(0, 0, nUnit));
centers.push(new Vector3D(-nUnit, 0, 0));
viewMatrix3D.prependTranslation(0, 0, myPerspective.focalLength);
mySprite.x = stage.stageWidth / 2;
mySprite.y = stage.stageHeight / 2;
vertices.push(-nUnit, -nUnit, -nUnit);
vertices.push(nUnit, -nUnit, -nUnit);
vertices.push(nUnit, nUnit, -nUnit);
vertices.push(-nUnit, nUnit, -nUnit);
vertices.push(-nUnit, -nUnit, nUnit);
vertices.push(nUnit, -nUnit, nUnit);
vertices.push(nUnit, nUnit, nUnit);
vertices.push(-nUnit, nUnit, nUnit);
vertices.push(-nUnit, -nUnit, -nUnit);
vertices.push(-nUnit, nUnit, -nUnit);
for (var i:uint = 0; i < nFaces; i++) {
addRectangleIndices(faces[i]);
}
uvtData.push(0, 0, 0);
uvtData.push(1/4, 0, 0);
uvtData.push(1/4, 1, 0);
uvtData.push(0, 1, 0);
uvtData.push(3/4, 0, 0);
uvtData.push(2/4, 0, 0);
uvtData.push(2/4, 1, 0);
uvtData.push(3/4, 1, 0);
uvtData.push(1, 0, 0);
uvtData.push(1, 1, 0);
addChild(mySprite);
addEventListener(Event.ENTER_FRAME, xRotate);
function xRotate(eventObject:Event):void {
var nRotationY:Number = mySprite.mouseX * nDeceleration;
var nRotationX:Number = mySprite.mouseY * nDeceleration; // 追加
var vertices2D:Vector.<Number> = new Vector.<Number>();
// xTransform(vertices2D, nRotationY);
xTransform(vertices2D, nRotationY, nRotationX);
xSetOrder();
xDraw(vertices2D);
}
// function xTransform(vertices2D:Vector.<Number>, myRotation:Number):void {
function xTransform(vertices2D:Vector.<Number>, myRotationY:Number, myRotationX:Number):void {
// worldMatrix3D.prependRotation(myRotation, Vector3D.Y_AXIS);
worldMatrix3D.appendRotation(myRotationY, Vector3D.Y_AXIS);
worldMatrix3D.appendRotation(myRotationX, Vector3D.X_AXIS); // 追加
var myMatrix3D:Matrix3D = worldMatrix3D.clone();
myMatrix3D.append(viewMatrix3D);
Utils3D.projectVectors(myMatrix3D, vertices, vertices2D, uvtData);
}
function xDraw(vertices2D:Vector.<Number>):void {
myGraphics.clear();
myGraphics.beginBitmapFill(myTexture);
myGraphics.drawTriangles(vertices2D, indices, uvtData);
myGraphics.endFill();
}
function addRectangleIndices(face:Vector.<uint>):void {
indices.push(face[0], face[1], face[3]);
indices.push(face[1], face[2], face[3]);
}
function xSetOrder():void {
var transformedFaces:Vector.<Array> = new Vector.<Array>();
for (var i:uint = 0; i < nFaces; i++) {
var transformedVector3D:Vector3D = worldMatrix3D.transformVector(centers[i]);
transformedFaces[i] = [transformedVector3D, faces[i]];
}
transformedFaces.sort(compare);
indices.length = 0;
for (var j:uint = 0; j < nFaces; j++) {
addRectangleIndices(transformedFaces[j][1]);
}
}
function compare(a:Array, b:Array):Number {
var nA:Number = a[0].z;
var nB:Number = b[0].z;
if (nA < nB) {
return 1;
} else if (nA > nB) {
return -1;
} else {
return 0;
}
}
[ムービープレビュー]を確かめると，
第1に，
図1 上下左右に回した立方体に面の前後を整えて塗る
テクスチャマッピングは今回で終える。次回は3次元空間座標を回転するMatrix3Dクラスのメソッドについて，
- ※2
- 変換を加えるのが後か先かの違いについては，
第36回 「Matrix3Dクラスの後から加える変換」 を参照してほしい。前回のスクリプトではy軸だけで水平に回したので， 後でも先でも変わりがなかった。
