quadarrayretained.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: QuadArrayRetained.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision: 1.7 $
 * $Date: 2007/02/09 17:18:16 $
 * $State: Exp $
 */

package javax.media.j3d;

import javax.vecmath.*;
import java.lang.Math;

/**
 * The QuadArray object draws the array of vertices as individual
 * quadrilaterals.  Each group
 * of four vertices defines a quadrilateral to be drawn.
 */

class QuadArrayRetained extends GeometryArrayRetained {

    QuadArrayRetained() {
	this.geoType = GEO_TYPE_QUAD_SET;
    }
        
    boolean intersect(PickShape pickShape, PickInfo pickInfo, int flags, Point3d iPnt,
                      GeometryRetained geom, int geomIndex) {
        
	Point3d pnts[] = new Point3d[4];
	double sdist[] = new double[1];
	double minDist = Double.MAX_VALUE;
	double x = 0, y = 0, z = 0;
        int[] vtxIndexArr = new int[4];
        
	int i = ((vertexFormat & GeometryArray.BY_REFERENCE) == 0 ?
		 initialVertexIndex : initialCoordIndex);
	pnts[0] = new Point3d();
	pnts[1] = new Point3d();
	pnts[2] = new Point3d();
	pnts[3] = new Point3d();
    
	switch (pickShape.getPickType()) {
	case PickShape.PICKRAY:
	    PickRay pickRay= (PickRay) pickShape;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectRay(pnts, pickRay, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKSEGMENT:
	    PickSegment pickSegment = (PickSegment) pickShape;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectSegment(pnts, pickSegment.start,
				     pickSegment.end, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGBOX:
	    BoundingBox bbox = (BoundingBox) 
		               ((PickBounds) pickShape).bounds;
	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectBoundingBox(pnts, bbox, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGSPHERE:
	    BoundingSphere bsphere = (BoundingSphere) 
		                     ((PickBounds) pickShape).bounds;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectBoundingSphere(pnts, bsphere, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGPOLYTOPE:

	    BoundingPolytope bpolytope = (BoundingPolytope) 
		                      ((PickBounds) pickShape).bounds;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectBoundingPolytope(pnts, bpolytope, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKCYLINDER:
	    PickCylinder pickCylinder= (PickCylinder) pickShape;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectCylinder(pnts, pickCylinder, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;
	case PickShape.PICKCONE:
	    PickCone pickCone= (PickCone) pickShape;

	    while (i < validVertexCount) {
                for(int j=0; j<4; j++) {
                    vtxIndexArr[j] = i;
                    getVertexData(i++, pnts[j]);
                }
		if (intersectCone(pnts, pickCone, sdist, iPnt)) {
		    if (flags == 0) {
			return true;
		    }
		    if (sdist[0] < minDist) {
			minDist = sdist[0];
			x = iPnt.x;
			y = iPnt.y;
			z = iPnt.z;
                	if((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
                            storeInterestData(pickInfo, flags, geom, geomIndex, 
                                              vtxIndexArr, iPnt, sdist[0]);
                        }
		    }
                    if((flags & PickInfo.ALL_GEOM_INFO) != 0) {
                        storeInterestData(pickInfo, flags, geom, geomIndex, 
                                          vtxIndexArr, iPnt, sdist[0]);                      
                    }
		}
	    }
	    break;