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package alternativa.engine3d.primitives {
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import alternativa.engine3d.*;
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import alternativa.engine3d.core.Mesh;
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import alternativa.engine3d.core.Object3D;
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import alternativa.engine3d.core.Surface;
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import flash.geom.Point;
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use namespace alternativa3d;
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/**
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* Прямоугольный параллелепипед.
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*/
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public class Box extends Mesh {
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/**
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* Создание нового параллелепипеда.
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* <p>Параллелепипед после создания будет содержать в себе шесть поверхностей.
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* <code>"front"</code>, <code>"back"</code>, <code>"left"</code>, <code>"right"</code>, <code>"top"</code>, <code>"bottom"</code>
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* на каждую из которых может быть установлен свой материал.</p>
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*
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* @param width ширина. Размерность по оси X. Не может быть меньше нуля.
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* @param length длина. Размерность по оси Y. Не может быть меньше нуля.
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* @param height высота. Размерность по оси Z. Не может быть меньше нуля.
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* @param widthSegments количество сегментов по ширине
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* @param lengthSegments количество сегментов по длине
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* @param heightSegments количество сегментов по по высоте
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* @param reverse задает направление нормалей граней. Если указано значение <code>true</code>, то нормали будут направлены внутрь фигуры.
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* @param triangulate флаг триангуляции. Если указано значение <code>true</code>, четырехугольники в параллелепипеде будут триангулированы.
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*/
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public function Box(width:Number = 100, length:Number = 100, height:Number = 100, widthSegments:uint = 1, lengthSegments:uint = 1, heightSegments:uint = 1, reverse:Boolean = false, triangulate:Boolean = false) {
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super();
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if ((widthSegments == 0) || (lengthSegments == 0) || (heightSegments == 0)) {
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return;
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}
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width = (width < 0)? 0 : width;
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length = (length < 0)? 0 : length;
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height = (height < 0)? 0 : height;
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var wh:Number = width/2;
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var lh:Number = length/2;
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var hh:Number = height/2;
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var ws:Number = width/widthSegments;
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var ls:Number = length/lengthSegments;
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var hs:Number = height/heightSegments;
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var x:int;
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var y:int;
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var z:int;
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// Создание точек
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for (x = 0; x <= widthSegments; x++) {
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for (y = 0; y <= lengthSegments; y++) {
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for (z = 0; z <= heightSegments; z++) {
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if (x == 0 || x == widthSegments || y == 0 || y == lengthSegments || z == 0 || z == heightSegments) {
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createVertex(x*ws - wh, y*ls - lh, z*hs - hh, x + "_" + y + "_" + z);
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}
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}
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}
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}
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// Создание поверхностей
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var front:Surface = createSurface(null, "front");
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var back:Surface = createSurface(null, "back");
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var left:Surface = createSurface(null, "left");
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var right:Surface = createSurface(null, "right");
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var top:Surface = createSurface(null, "top");
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var bottom:Surface = createSurface(null, "bottom");
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// Создание граней
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var wd:Number = 1/widthSegments;
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var ld:Number = 1/lengthSegments;
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var hd:Number = 1/heightSegments;
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var faceId:String;
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// Для оптимизаций UV при триангуляции
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var aUV:Point;
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var cUV:Point;
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// Построение верхней грани
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for (y = 0; y < lengthSegments; y++) {
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for (x = 0; x < widthSegments; x++) {
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faceId = "top_"+x+"_"+y;
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if (reverse) {
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if (triangulate) {
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aUV = new Point(x*wd, (lengthSegments - y)*ld);
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cUV = new Point((x + 1)*wd, (lengthSegments - y - 1)*ld);
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createFace([x + "_" + y + "_" + heightSegments, x + "_" + (y + 1) + "_" + heightSegments, (x + 1) + "_" + (y + 1) + "_" + heightSegments], faceId + ":1");
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setUVsToFace(aUV, new Point(x*wd, (lengthSegments - y - 1)*ld), cUV, faceId + ":1");
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createFace([(x + 1) + "_" + (y + 1) + "_" + heightSegments, (x + 1) + "_" + y + "_" + heightSegments, x + "_" + y + "_" + heightSegments], faceId + ":0");
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setUVsToFace(cUV, new Point((x + 1)*wd, (lengthSegments - y)*ld), aUV, faceId + ":0");
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} else {
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createFace([x + "_" + y + "_" + heightSegments, x + "_" + (y + 1) + "_" + heightSegments, (x + 1) + "_" + (y + 1) + "_" + heightSegments, (x + 1) + "_" + y + "_" + heightSegments], faceId);
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setUVsToFace(new Point(x*wd, (lengthSegments - y)*ld), new Point(x*wd, (lengthSegments - y - 1)*ld), new Point((x + 1)*wd, (lengthSegments - y - 1)*ld), faceId);
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}
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} else {
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if (triangulate) {
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aUV = new Point(x*wd, y*ld);
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cUV = new Point((x + 1)*wd, (y + 1)*ld);
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createFace([x + "_" + y + "_" + heightSegments, (x + 1) + "_" + y + "_" + heightSegments, (x + 1) + "_" + (y + 1) + "_" + heightSegments], faceId + ":0");
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setUVsToFace(aUV, new Point((x + 1)*wd, y*ld), cUV, faceId + ":0");
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createFace([(x + 1) + "_" + (y + 1) + "_" + heightSegments, x + "_" + (y + 1) + "_" + heightSegments, x + "_" + y + "_" + heightSegments], faceId + ":1");
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setUVsToFace(cUV, new Point(x*wd, (y + 1)*ld), aUV, faceId + ":1");
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} else {
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createFace([x + "_" + y + "_" + heightSegments, (x + 1) + "_" + y + "_" + heightSegments, (x + 1) + "_" + (y + 1) + "_" + heightSegments, x + "_" + (y + 1) + "_" + heightSegments], faceId);
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setUVsToFace(new Point(x*wd, y*ld), new Point((x + 1)*wd, y*ld), new Point((x + 1)*wd, (y + 1)*ld), faceId);
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}
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}
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if (triangulate) {
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top.addFace(faceId + ":0");
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top.addFace(faceId + ":1");
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} else {
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top.addFace(faceId);
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}
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}
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}
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// Построение нижней грани
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for (y = 0; y < lengthSegments; y++) {
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for (x = 0; x < widthSegments; x++) {
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faceId = "bottom_" + x + "_" + y;
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if (reverse) {
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if (triangulate) {
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aUV = new Point((widthSegments - x)*wd, (lengthSegments - y)*ld);
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cUV = new Point((widthSegments - x - 1)*wd, (lengthSegments - y - 1)*ld);
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createFace([x + "_" + y + "_" + 0, (x + 1) + "_" + y + "_" + 0, (x + 1) + "_" + (y + 1) + "_" + 0], faceId + ":0");
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setUVsToFace(aUV, new Point((widthSegments - x - 1)*wd, (lengthSegments - y)*ld), cUV, faceId + ":0");
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createFace([(x + 1) + "_" + (y + 1) + "_" + 0, x + "_" + (y + 1) + "_" + 0, x + "_" + y + "_" + 0], faceId + ":1");
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setUVsToFace(cUV, new Point((widthSegments - x)*wd, (lengthSegments - y - 1)*ld), aUV, faceId + ":1");
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} else {
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createFace([x + "_" + y + "_"+0, (x + 1) + "_" + y + "_" + 0, (x + 1) + "_" + (y + 1) + "_" + 0, x + "_" + (y + 1) + "_" + 0], faceId);
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setUVsToFace(new Point((widthSegments - x)*wd, (lengthSegments - y)*ld), new Point((widthSegments - x - 1)*wd, (lengthSegments - y)*ld), new Point((widthSegments - x - 1)*wd, (lengthSegments - y - 1)*ld), faceId);
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}
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} else {
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if (triangulate) {
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aUV = new Point((widthSegments - x)*wd, y*ld);
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cUV = new Point((widthSegments - x - 1)*wd, (y + 1)*ld);
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createFace([x + "_" + y + "_" + 0, x + "_" + (y + 1) + "_" + 0, (x + 1) + "_" + (y + 1) + "_" + 0], faceId + ":1");
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setUVsToFace(aUV, new Point((widthSegments - x)*wd, (y + 1)*ld), cUV, faceId + ":1");
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createFace([(x + 1) + "_" + (y + 1) + "_" + 0, (x + 1) + "_" + y + "_" + 0, x + "_" + y + "_" + 0], faceId + ":0");
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setUVsToFace(cUV, new Point((widthSegments - x - 1)*wd, y*ld), aUV, faceId + ":0");
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} else {
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createFace([x + "_" + y + "_" + 0, x + "_" + (y + 1) +"_" + 0, (x + 1) + "_" + (y + 1) + "_" + 0, (x + 1) + "_" + y + "_" + 0], faceId);
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setUVsToFace(new Point((widthSegments - x)*wd, y*ld), new Point((widthSegments - x)*wd, (y + 1)*ld), new Point((widthSegments - x - 1)*wd, (y + 1)*ld), faceId);
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}
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}
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if (triangulate) {
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bottom.addFace(faceId + ":0");
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bottom.addFace(faceId + ":1");
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} else {
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bottom.addFace(faceId);
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}
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}
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}
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// Построение фронтальной грани
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for (z = 0; z < heightSegments; z++) {
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for (x = 0; x < widthSegments; x++) {
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faceId = "front_"+x+"_"+z;
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if (reverse) {
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if (triangulate) {
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aUV = new Point((widthSegments - x)*wd, z*hd);
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cUV = new Point((widthSegments - x - 1)*wd, (z + 1)*hd);
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createFace([x + "_" + 0 + "_" + z, x + "_" + 0 + "_" + (z + 1), (x + 1) + "_" + 0 + "_" + (z + 1)], faceId + ":1");
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setUVsToFace(aUV, new Point((widthSegments - x)*wd, (z + 1)*hd), cUV, faceId + ":1");
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createFace([(x + 1) + "_" + 0 + "_" + (z + 1), (x + 1) + "_" + 0 + "_" + z, x + "_" + 0 + "_" + z], faceId + ":0");
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setUVsToFace(cUV, new Point((widthSegments - x - 1)*wd, z*hd), aUV, faceId + ":0");
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} else {
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createFace([x + "_" + 0 + "_" + z, x + "_" + 0 + "_" + (z + 1), (x + 1) + "_" + 0 + "_" + (z + 1), (x + 1) + "_" + 0 + "_" + z], faceId);
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setUVsToFace(new Point((widthSegments - x)*wd, z*hd), new Point((widthSegments - x)*wd, (z + 1)*hd), new Point((widthSegments - x - 1)*wd, (z + 1)*hd), faceId);
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}
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} else {
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if (triangulate) {
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aUV = new Point(x*wd, z*hd);
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cUV = new Point((x + 1)*wd, (z + 1)*hd);
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createFace([x + "_" + 0 + "_" + z, (x + 1) + "_" + 0 + "_" + z, (x + 1) + "_" + 0 + "_" + (z + 1)], faceId + ":0");
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setUVsToFace(aUV, new Point((x + 1)*wd, z*hd), cUV, faceId + ":0");
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createFace([(x + 1) + "_" + 0 + "_" + (z + 1), x + "_" + 0 + "_" + (z + 1), x + "_" + 0 + "_" + z], faceId + ":1");
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setUVsToFace(cUV, new Point(x*wd, (z + 1)*hd), aUV, faceId + ":1");
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} else {
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createFace([x + "_" + 0 + "_" + z, (x + 1) + "_" + 0 + "_" + z, (x + 1) + "_" + 0 + "_" + (z + 1), x + "_" + 0 + "_" + (z + 1)], faceId);
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setUVsToFace(new Point(x*wd, z*hd), new Point((x + 1)*wd, z*hd), new Point((x + 1)*wd, (z + 1)*hd), faceId);
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}
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}
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if (triangulate) {
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front.addFace(faceId + ":0");
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front.addFace(faceId + ":1");
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} else {
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front.addFace(faceId);
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}
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}
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}
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// Построение задней грани
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for (z = 0; z < heightSegments; z++) {
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for (x = 0; x < widthSegments; x++) {
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faceId = "back_"+x+"_"+z;
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if (reverse) {
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if (triangulate) {
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aUV = new Point(x * wd, (z + 1) * hd);
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cUV = new Point((x + 1) * wd, z * hd);
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createFace([x + "_" + lengthSegments+"_" + (z + 1), x + "_"+lengthSegments + "_" + z, (x + 1) + "_" + lengthSegments + "_" + z], faceId + ":0");
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setUVsToFace(aUV, new Point(x * wd, z * hd), cUV, faceId + ":0");
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createFace([(x + 1) + "_" + lengthSegments + "_" + z, (x + 1) + "_" + lengthSegments + "_" + (z + 1), x + "_" + lengthSegments + "_" + (z + 1)], faceId + ":1");
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setUVsToFace(cUV, new Point((x + 1) * wd, (z + 1) * hd), aUV, faceId + ":1");
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} else {
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createFace([x + "_" + lengthSegments + "_" + z, (x + 1) + "_" + lengthSegments + "_" + z, (x + 1) + "_" + lengthSegments + "_" + (z + 1), x + "_" + lengthSegments + "_" + (z + 1)], faceId);
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setUVsToFace(new Point(x*wd, z*hd), new Point((x + 1)*wd, z*hd), new Point((x + 1)*wd, (z + 1)*hd), faceId);
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}
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} else {
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if (triangulate) {
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aUV = new Point((widthSegments - x)*wd, (z + 1)*hd);
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cUV = new Point((widthSegments - x - 1)*wd, z*hd);
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createFace([x + "_" + lengthSegments + "_" + z, x + "_" + lengthSegments + "_" + (z + 1), (x + 1) + "_" + lengthSegments + "_" + z], faceId + ":0");
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setUVsToFace(new Point((widthSegments - x)*wd, z*hd), aUV, cUV, faceId + ":0");
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createFace([x + "_" + lengthSegments + "_" + (z + 1), (x + 1) + "_" + lengthSegments + "_" + (z + 1), (x + 1) + "_" + lengthSegments + "_" + z], faceId + ":1");
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setUVsToFace(aUV, new Point((widthSegments - x - 1)*wd, (z + 1)*hd), cUV, faceId + ":1");
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} else {
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createFace([x + "_" + lengthSegments + "_" + z, x + "_" + lengthSegments + "_" + (z + 1), (x + 1) + "_" + lengthSegments + "_" + (z + 1), (x + 1) + "_" + lengthSegments + "_" + z], faceId);
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setUVsToFace(new Point((widthSegments - x)*wd, z*hd), new Point((widthSegments - x)*wd, (z + 1)*hd), new Point((widthSegments - x - 1)*wd, (z + 1)*hd), faceId);
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}
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}
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if (triangulate) {
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back.addFace(faceId + ":0");
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back.addFace(faceId + ":1");
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} else {
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back.addFace(faceId);
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}
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}
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}
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// Построение левой грани
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for (y = 0; y < lengthSegments; y++) {
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for (z = 0; z < heightSegments; z++) {
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faceId = "left_" + y + "_" + z;
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if (reverse) {
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if (triangulate) {
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aUV = new Point(y*ld, (z + 1)*hd);
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cUV = new Point((y + 1)*ld, z*hd);
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createFace([0 + "_" + y + "_" + (z + 1), 0 + "_" + y + "_" + z, 0 + "_" + (y + 1) + "_" + z], faceId + ":0");
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setUVsToFace(aUV, new Point(y*ld, z*hd), cUV, faceId + ":0");
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createFace([0 + "_" + (y + 1) + "_" + z, 0 + "_" + (y + 1) + "_" + (z + 1), 0 + "_" + y + "_" + (z + 1)], faceId + ":1");
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setUVsToFace(cUV, new Point((y + 1)*ld, (z + 1)*hd), aUV, faceId + ":1");
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} else {
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createFace([0 + "_" + y + "_" + z, 0 + "_" + (y + 1) + "_" + z, 0 + "_" + (y + 1) + "_" + (z + 1), 0 + "_" + y + "_" + (z + 1)], faceId);
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setUVsToFace(new Point(y*ld, z*hd), new Point((y + 1)*ld, z*hd), new Point((y + 1)*ld, (z + 1)*hd), faceId);
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}
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} else {
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if (triangulate) {
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aUV = new Point((lengthSegments - y - 1)*ld, z*hd);
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cUV = new Point((lengthSegments - y)*ld, (z + 1)*hd);
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createFace([0 + "_" + (y + 1) + "_" + z, 0 + "_" + y + "_" + z, 0 + "_" + y + "_" + (z + 1)], faceId + ":0");
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setUVsToFace(aUV, new Point((lengthSegments - y)*ld, z*hd), cUV, faceId + ":0");
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createFace([0 + "_" + y + "_" + (z + 1), 0 + "_" + ((y + 1)) + "_" + (z + 1), 0 + "_" + (y + 1) + "_" + z], faceId + ":1");
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setUVsToFace(cUV, new Point((lengthSegments - y - 1)*ld, (z + 1)*hd), aUV, faceId + ":1");
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} else {
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createFace([0 + "_" + y + "_" + z, 0 + "_" + y + "_" + (z + 1), 0 + "_" + ((y + 1)) + "_" + (z + 1), 0 + "_" + ((y + 1)) + "_" + z], faceId);
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setUVsToFace(new Point((lengthSegments - y)*ld, z*hd), new Point((lengthSegments - y)*ld, (z + 1)*hd), new Point((lengthSegments - y - 1)*ld, (z + 1)*hd), faceId);
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}
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}
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if (triangulate) {
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left.addFace(faceId + ":0");
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left.addFace(faceId + ":1");
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} else {
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left.addFace(faceId);
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}
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}
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}
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// Построение правой грани
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for (y = 0; y < lengthSegments; y++) {
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for (z = 0; z < heightSegments; z++) {
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faceId = "right_" + y + "_" + z;
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if (reverse) {
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if (triangulate) {
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aUV = new Point((lengthSegments - y)*ld, z*hd);
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cUV = new Point((lengthSegments - y - 1)*ld, (z + 1)*hd);
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createFace([widthSegments + "_" + y + "_" + z, widthSegments + "_" + y + "_" + (z + 1), widthSegments + "_" + (y + 1) + "_" + (z + 1)], faceId + ":1");
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setUVsToFace(aUV, new Point((lengthSegments - y)*ld, (z + 1)*hd), cUV, faceId + ":1");
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createFace([widthSegments + "_" + (y + 1) + "_" + (z + 1), widthSegments + "_" + (y + 1) + "_" + z, widthSegments + "_" + y + "_" + z], faceId + ":0");
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setUVsToFace(cUV, new Point((lengthSegments - y - 1)*ld, z*hd), aUV, faceId + ":0");
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} else {
|
||||
createFace([widthSegments + "_" + y + "_" + z, widthSegments + "_" + y + "_" + (z + 1), widthSegments + "_" + (y + 1) + "_" + (z + 1), widthSegments + "_" + (y + 1) + "_" + z], faceId);
|
||||
setUVsToFace(new Point((lengthSegments - y)*ld, z*hd), new Point((lengthSegments - y)*ld, (z + 1)*hd), new Point((lengthSegments - y - 1)*ld, (z + 1)*hd), faceId);
|
||||
}
|
||||
} else {
|
||||
if (triangulate) {
|
||||
aUV = new Point(y*ld, z*hd);
|
||||
cUV = new Point((y + 1)*ld, (z + 1)*hd);
|
||||
createFace([widthSegments + "_" + y + "_" + z, widthSegments + "_" + (y + 1) + "_" + z, widthSegments + "_" + (y + 1) + "_" + (z + 1)], faceId + ":0");
|
||||
setUVsToFace(aUV, new Point((y + 1)*ld, z*hd), cUV, faceId + ":0");
|
||||
createFace([widthSegments + "_" + (y + 1) + "_" + (z + 1), widthSegments + "_" + y + "_" + (z + 1), widthSegments + "_" + y + "_" + z], faceId + ":1");
|
||||
setUVsToFace(cUV, new Point(y*ld, (z + 1)*hd), aUV, faceId + ":1");
|
||||
} else {
|
||||
createFace([widthSegments + "_" + y + "_" + z, widthSegments + "_" + (y + 1) + "_" + z, widthSegments + "_" + (y + 1) + "_" + (z + 1), widthSegments + "_" + y + "_" + (z + 1)], faceId);
|
||||
setUVsToFace(new Point(y*ld, z*hd), new Point((y + 1)*ld, z*hd), new Point((y + 1)*ld, (z + 1)*hd), faceId);
|
||||
}
|
||||
}
|
||||
if (triangulate) {
|
||||
right.addFace(faceId + ":0");
|
||||
right.addFace(faceId + ":1");
|
||||
} else {
|
||||
right.addFace(faceId);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @inheritDoc
|
||||
*/
|
||||
protected override function createEmptyObject():Object3D {
|
||||
return new Box(0, 0, 0, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user