franto.com

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