Question

我对Papervision3D或者bitmapData有疑问，我不确定问题出在哪里。我已经构建了一个程序，它采用4个横幅并将它们分成碎片，然后将这些碎片应用到立方体中，这样我就可以制作横幅旋转器。因此，在我运行程序后，我有10个立方体，每个立方体的4个面（正面，顶部，背面，底部）上有一个横幅。问题是某些面部定位不正确（旋转180度）。 Papervision3D有没有办法旋转立方体面？我认为问题的另一个地方是当我创建将应用于立方体面的bitmapData时。有没有办法在bitmapData创建过程中明确定义方向？任何帮助或想法将不胜感激。谢谢！

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这是我的CubeMaker.as类的代码。这是获取图像片段并将其应用于立方体的类。

package  {

import away3d.events.MaterialEvent;
import away3d.materials.BitmapMaterial;
import away3d.materials.ColorMaterial;
import away3d.materials.TransformBitmapMaterial;
import away3d.primitives.Cube;
import away3d.primitives.data.CubeMaterialsData;
import CubeEvent;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;

public class CubeMaker extends Sprite {

    private var _colorMaterial:ColorMaterial = new ColorMaterial(0x000000);
    private var _dcRef;
    private var _banners:Array;
    private var _cubeArray:Array = [];
    private var _cubeCoung:int = 0;
    private var _numberOfPieces:int;
    private var _width:Number;
    private var _depth:Number;
    private var _height:Number;

    public function CubeMaker(banners:Array, numberOfPieces:int) {

        _dcRef = DocumentClass._base;
        _banners = banners;
        _numberOfPieces = numberOfPieces;
    }

    public function makeCubes() {

        //loop through the cubes
        for (var i = 0; i < _numberOfPieces; i++) {
            var faceBitmapArray:Array;

            //fill array with four faces for current cube
            faceBitmapArray =  fillFace(i);

            //get width and height from a piece instance
            var width:Number;
            var height:Number;
            var tempArray:Array;
            tempArray = _banners[0];
            _width = tempArray[0].width;
            _height = tempArray[0].height;
            _depth = tempArray[0].height;

            //create four materials from bitmapData
            var myFront:TransformBitmapMaterial = new TransformBitmapMaterial(faceBitmapArray[0], {rotation:0} );
            var myTop:TransformBitmapMaterial = new TransformBitmapMaterial(faceBitmapArray[1], {rotation:0.5} );
            var myBack:TransformBitmapMaterial = new TransformBitmapMaterial(faceBitmapArray[2], {rotation:0} );
            var myBottom:TransformBitmapMaterial = new TransformBitmapMaterial(faceBitmapArray[3], {rotation:0} );

            //create two materians from color
            var myLeft:ColorMaterial = new ColorMaterial(0x000000);
            var myRight:ColorMaterial = new ColorMaterial(0x000000);

            //create a CubeMatrialsData from the materials created above
            var myMaterials:CubeMaterialsData = new CubeMaterialsData( { front:myFront, back:myBack, top:myTop, bottom:myBottom, left:myLeft, right:myRight} );

            //listen for material change
            myMaterials.addOnMaterialChange(materialChanged);

            //create a new cube with the CubeMaterialsData created earlier
            var _cube = new Cube({width:_width, height:_height, depth:_depth, cubeMaterials:myMaterials}); 

            //the created cube is put into the _cubeArray
            _cubeArray[i] = _cube;
            if (i == (_numberOfPieces - 1)) cubesMade();
        }
    }
    private function fillFace(i:int):Array {
        var faceBitmapArray:Array = [];
        for (var j = 0; j < 4; j++) {
            //tempBannerArray filled with one banner in pieces
            var tempBannerArray:Array = _banners[j];
            //batmapData created and sized to current banner piece
            var bitmapData:BitmapData = new BitmapData(tempBannerArray[i].width, tempBannerArray[i].height);
            //bitmapData filled with current banner piece bitmap data
            bitmapData = tempBannerArray[i].bitmapData;
            bitmapData.lock();

            //array is filled with bitmap data
            faceBitmapArray[j] = bitmapData;
        }
        return faceBitmapArray;
    }

    private function cubesMade() {
        //dispatch event to notify of cube making completion
        dispatchEvent(new CubeEvent(CubeEvent.CUBES_MADE, _cubeArray.length));
    }

    private function materialChanged(e:MaterialEvent):void {
        trace("Warning! Warning! Material changed!");
    }

    public function get cubes():Array {
        return _cubeArray;
    }

    public function get cubeWidth():Number {
        return _width;
    }

    public function get cubeHeight():Number {
        return _height;
    }

    public function get cubeDepth():Number {
        return _depth;
    }
}

}

Answer 1

前言：Papervision3D is close to unsupported / closed as a library，所以我强烈建议您使用Away3D或其他动作脚本3D库。尽管在PV3D上完成的工作从强大的角度来看是非常强大的，但是如果你想用它来构建3D体验，那就非常好了。从一开始就知道未来的dev +支持是不可能的。

除了前言之外，请查看库中的“Cube”原始类。您可以创建材质并将它们附加到将添加到多维数据集实例的MaterialsList实例。假设您正在使用BitmapMaterial，它具有您可以设置的“旋转”属性。只需确定哪些材料倒置并使其旋转= 180.优点：快速;缺点：硬编码。

另一种选择是在“资产”端点击问题并翻转图像。优点：快;缺点：不可扩展或将问题放在设计师身上。

加载数据/资产时，最佳选择是使用“旋转”属性，您可以使用该属性设置应翻转的图像。这是一个立方体，所以像Ender所说，up是相对的。

Papervision3D立方体面部方向

1 个答案: