indexedlinearrayretained.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: IndexedLineArrayRetained.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision: 1.7 $
 * $Date: 2007/04/03 23:14:19 $
 * $State: Exp $
 */

package javax.media.j3d;

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

/**
 * The IndexedLineArray object draws the array of vertices as individual
 * line segments.  Each pair of vertices defines a line to be drawn.
 */

class IndexedLineArrayRetained extends IndexedGeometryArrayRetained {

    IndexedLineArrayRetained() {
        this.geoType = GEO_TYPE_INDEXED_LINE_SET;
    }
    
    boolean intersect(PickShape pickShape, PickInfo pickInfo, int flags, Point3d iPnt,
            GeometryRetained geom, int geomIndex) {
        Point3d pnts[] = new Point3d[2];
        double sdist[] = new double[1];
        double minDist = Double.MAX_VALUE;
        double x = 0, y = 0, z = 0;
        //NVaidya
        // Bug 447: While loops below now traverse over all
        // elements in the valid index range from initialIndexIndex
        // to initialIndexInex + validIndexCount - 1
        int i = initialIndexIndex;
        int loopStopIndex = initialIndexIndex + validIndexCount;
        pnts[0] = new Point3d();
        pnts[1] = new Point3d();
        int[] vtxIndexArr = new int[2];
        
        switch (pickShape.getPickType()) {
            case PickShape.PICKRAY:
                PickRay pickRay= (PickRay) pickShape;
                
                while (i < loopStopIndex) {
                    for(int k=0; k<2; k++) {
                        vtxIndexArr[k] = indexCoord[i];
                        getVertexData(indexCoord[i++], pnts[k]);
                    }
                    if (intersectLineAndRay(pnts[0], pnts[1], pickRay.origin,
                            pickRay.direction, 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;
                Vector3d dir =
                        new Vector3d(pickSegment.end.x - pickSegment.start.x,
                        pickSegment.end.y - pickSegment.start.y,
                        pickSegment.end.z - pickSegment.start.z);
                
                while (i < loopStopIndex) {
                    for(int k=0; k<2; k++) {
                        vtxIndexArr[k] = indexCoord[i];
                        getVertexData(indexCoord[i++], pnts[k]);
                    }
                    if (intersectLineAndRay(pnts[0], pnts[1],
                            pickSegment.start,
                            dir, sdist, iPnt) &&
                            (sdist[0] <= 1.0)) {
                        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 < loopStopIndex) {
                    for(int k=0; k<2; k++) {
                        vtxIndexArr[k] = indexCoord[i];
                        getVertexData(indexCoord[i++], pnts[k]);
                    }
                    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 < loopStopIndex) {
                    for(int k=0; k<2; k++) {
                        vtxIndexArr[k] = indexCoord[i];
                        getVertexData(indexCoord[i++], pnts[k]);
                    }
                    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 < loopStopIndex) {
                    for(int k=0; k<2; k++) {
                        vtxIndexArr[k] = indexCoord[i];
                        getVertexData(indexCoord[i++], pnts[k]);
                    }
                    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 < loopStopIndex) {
                    for(int k=0; k<2; k++) {