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package {
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import org.papervision3d.core.geom.*;
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import org.papervision3d.core.geom.renderables.Triangle3D;
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import org.papervision3d.core.geom.renderables.Vertex3D;
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import org.papervision3d.core.math.NumberUV;
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import org.papervision3d.core.proto.*;
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/**
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* The RadialSegment class lets you create and display cylinders radial segments.
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*
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* The RadialSegment is divided in horizontal mesh segments and vertical ragial segments.
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* * Derivated from original Cylinder class by Daniel Sedlacek (sedlacek.daniel@gmail.com).
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* * Please follow the original Papervision3D license.
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*/
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public class RadialSegment extends TriangleMesh3D {
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/**
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* Number of segments horizontally. Defaults to 8.
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*/
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public var segmentsW : Number; /**
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* Number of segments vertically. Defaults to 6.
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*/
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public var segmentsH : Number;
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/**
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* Default radius of Segment3D if not defined.
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*/
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static public var DEFAULT_RADIUS : Number = 100;
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/**
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* Default height if not defined.
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*/
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static public var DEFAULT_HEIGHT : Number = 50;
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/**
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* Default value of gridX if not defined.
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*/
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static public var DEFAULT_SEGMENTSW : Number = 8;
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/**
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* Default value of gridY if not defined.
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*/
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static public var DEFAULT_SEGMENTSH : Number = 2;
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/**
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* Minimum value of gridX.
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*/
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static public var MIN_SEGMENTSW : Number = 3;
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/**
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* Minimum value of gridY.
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*/
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static public var MIN_SEGMENTSH : Number = 1;
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/**
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* Create a new Cylinder object.
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*
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* @param material [optional] - A MaterialObject3D object that contains the material properties of the object.
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* * @param angle [optional] - Desired segment angle <0,1>.
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* * @param radius [optional] - Desired radius.
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* * @param segmentsW [optional] - Number of segments horizontally. Defaults to 8.
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* * @param segmentsH [optional] - Number of segments vertically. Defaults to 6.
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* * @param topRadius [optional] - An optional parameter for con- or diverging cylinders
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* * @param initObject [optional] - An object that contains user defined properties with which to populate the newly created GeometryObject3D.
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* * It includes x, y, z, rotationX, rotationY, rotationZ, scaleX, scaleY scaleZ and a user defined extra object.
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* * If extra is not an object, it is ignored. All properties of the extra field are copied into the new instance. The properties specified with extra are publicly available.
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*/
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public function RadialSegment( material : MaterialObject3D = null, angle : Number = 0.25, radius : Number = 100, height : Number = 100, segmentsW : int = 8, segmentsH : int = 2, topRadius : Number = -1, initObject : Object = null ) {
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super(material, new Array(), new Array(), null, initObject); this.segmentsW = Math.max(MIN_SEGMENTSW, segmentsW || DEFAULT_SEGMENTSW);
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// Defaults to 8
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this.segmentsH = Math.max(MIN_SEGMENTSH, segmentsH || DEFAULT_SEGMENTSH);
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// Defaults to 6
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if (radius == 0) radius = DEFAULT_RADIUS;
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// Defaults to 100
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if (height == 0) height = DEFAULT_HEIGHT;
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// Defaults to 100
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if (topRadius == -1) topRadius = radius;
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// segment
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angle = angle> 1 ? 1 : angle <0 ? 0 : angle;
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buildSegment(angle, radius, height, topRadius);
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}
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private function buildSegment( fAngle : Number, fRadius : Number, fHeight : Number, fTopRadius : Number ) : void {
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var matInstance : MaterialObject3D = material;
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var i : Number, j : Number;
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var iHor : Number = this.segmentsW + 1;
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var iVer : Number = this.segmentsH;
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var aVertice : Array = this.geometry.vertices;
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var aFace : Array = this.geometry.faces;
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var aVtc : Array = new Array();
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for (j = 0;j <(iVer + 1);j++) {
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// vertical
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var fZ : Number = fHeight * (j / (iVer + 0)) - fHeight / 2;
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//-fRadius*Math.cos(fRad1*Math.PI);
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var fRds : Number = fTopRadius + (fRadius - fTopRadius) * (1 - j / (iVer));
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//*Math.sin(fRad1*Math.PI);
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var aRow : Array = new Array();
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var oVtx : Vertex3D;
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for (i = 0;i <iHor;i++) {
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// horizontal
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var fRad2 : Number = Number(2 * i / (iHor - 1));
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var fX : Number = fRds * Math.sin(fRad2 * Math.PI * fAngle);
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var fY : Number = fRds * Math.cos(fRad2 * Math.PI * fAngle);
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oVtx = new Vertex3D(fY, fZ, fX);
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aVertice.push(oVtx);
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aRow.push(oVtx);
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}
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// special middle vertex
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oVtx = new Vertex3D(0, fZ, 0);
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aVertice.push(oVtx);
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aRow.push(oVtx);
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aVtc.push(aRow);
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}
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var iVerNum : int = aVtc.length;
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var aP4uv : NumberUV, aP1uv : NumberUV, aP2uv : NumberUV, aP3uv : NumberUV;
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var aP1 : Vertex3D, aP2 : Vertex3D, aP3 : Vertex3D, aP4 : Vertex3D;
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for (j = 0;j <iVerNum;j++) {
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var iHorNum : int = aVtc[j].length;
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for (i = 0;i <iHorNum;i++) {
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if (j> 0 && i>= 0) {
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// select vertices
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var bEnd : Boolean = i == (iHorNum - 0);
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aP1 = aVtc[j][bEnd ? 0 : i];
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aP2 = aVtc[j][(i == 0 ? iHorNum : i) - 1];
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aP3 = aVtc[j - 1][(i == 0 ? iHorNum : i) - 1];
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aP4 = aVtc[j - 1][bEnd ? 0 : i];
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// uv
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var fJ0 : Number = j / iVerNum;
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var fJ1 : Number = (j - 1) / iVerNum;
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var fI0 : Number = (i + 1) / iHorNum;
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var fI1 : Number = i / iHorNum;
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aP4uv = new NumberUV(fI0, fJ1);
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aP1uv = new NumberUV(fI0, fJ0);
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aP2uv = new NumberUV(fI1, fJ0);
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aP3uv = new NumberUV(fI1, fJ1);
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aFace.push(new Triangle3D(this, [aP1,aP2,aP3], matInstance, [aP1uv,aP2uv,aP3uv]));
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aFace.push(new Triangle3D(this, [aP1,aP3,aP4], matInstance, [aP1uv,aP3uv,aP4uv]));
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}
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}
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if (j == 0 || j == (iVerNum - 1)) {
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for (i = 0;i <(iHorNum - 2);i++) {
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// uv
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aP1 = aVtc[j][iHorNum - 1];
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aP2 = aVtc[j][i];
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aP3 = aVtc[j][i + 1];
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var bTop : Boolean = j == 0;
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aP1uv = new NumberUV((bTop ? 1 : 0) + (bTop ? -1 : 1) * (aP1.x / fRadius / 2 + .5), aP1.z / fRadius / 2 + .5);
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aP2uv = new NumberUV((bTop ? 1 : 0) + (bTop ? -1 : 1) * (aP2.x / fRadius / 2 + .5), aP2.z / fRadius / 2 + .5);
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aP3uv = new NumberUV((bTop ? 1 : 0) + (bTop ? -1 : 1) * (aP3.x / fRadius / 2 + .5), aP3.z / fRadius / 2 + .5);
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// face
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if (j == 0) aFace.push(new Triangle3D(this, [aP1,aP3,aP2], matInstance, [aP1uv,aP3uv,aP2uv]));
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else aFace.push(new Triangle3D(this, [aP1,aP2,aP3], matInstance, [aP1uv,aP2uv,aP3uv]));
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}
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}
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}
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this.geometry.ready = true;
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}
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}
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}
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