indexedlinestriparrayretained.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: IndexedLineStripArrayRetained.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision: 1.6 $
 * $Date: 2007/02/09 17:18:04 $
 * $State: Exp $
 */

package javax.media.j3d;
import javax.vecmath.*;
import java.lang.Math;

/**
 * The IndexedLineStripArray object draws an array of vertices as a set of
 * connected line strips.  An array of per-strip vertex counts specifies
 * where the separate strips appear in the vertex array.
 * For every strip in the set, each vertex, beginning with
 * the second vertex in the array, defines a line segment to be drawn
 * from the previous vertex to the current vertex.
 */

class IndexedLineStripArrayRetained extends IndexedGeometryStripArrayRetained {
	
    IndexedLineStripArrayRetained() {
        geoType = GEO_TYPE_INDEXED_LINE_STRIP_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;
	int scount, j, i = 0;
	int count = 0;
        int[] vtxIndexArr = new int[2];
        
	pnts[0] = new Point3d();
	pnts[1] = new Point3d();
    
	switch (pickShape.getPickType()) {
	case PickShape.PICKRAY:
	    PickRay pickRay= (PickRay) pickShape;

	   while (i < stripIndexCounts.length) {
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount = stripIndexCounts[i++];
		for (j=1; j < scount; j++) {
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    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]);                      
       		        }
                    }
		    pnts[0].set(pnts[1]);
                    vtxIndexArr[0] = vtxIndexArr[1];
		}
	    }
	    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 < stripIndexCounts.length) {  
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount =  stripIndexCounts[i++];
		for (j=1; j < scount; j++) {	 
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    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]);                      
       		        }
                    }
		    pnts[0].set(pnts[1]);
                    vtxIndexArr[0] = vtxIndexArr[1];
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGBOX:
	    BoundingBox bbox = (BoundingBox) 
		               ((PickBounds) pickShape).bounds;

	    while (i < stripIndexCounts.length) {  
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount =  stripIndexCounts[i++];
		for (j=1; j < scount; j++) {	 
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    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]);                      
       		        }
                    }
		    pnts[0].set(pnts[1]);
                    vtxIndexArr[0] = vtxIndexArr[1];
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGSPHERE:
	    BoundingSphere bsphere = (BoundingSphere) 
		                     ((PickBounds) pickShape).bounds;

	    while (i < stripIndexCounts.length) {  
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount =  stripIndexCounts[i++];
		for (j=1; j < scount; j++) {
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    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]);                      
       		        }
                    }
		    pnts[0].set(pnts[1]);
                    vtxIndexArr[0] = vtxIndexArr[1];
		}
	    }
	    break;
	case PickShape.PICKBOUNDINGPOLYTOPE:
	    BoundingPolytope bpolytope = (BoundingPolytope) 
		                      ((PickBounds) pickShape).bounds;

	    while (i < stripIndexCounts.length) {  
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount =  stripIndexCounts[i++];
		for (j=1; j < scount; j++) {
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    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]);                      
       		        }
                    }
		    pnts[0].set(pnts[1]);
                    vtxIndexArr[0] = vtxIndexArr[1];
		}
	    }
	    break;
	case PickShape.PICKCYLINDER:
	    PickCylinder pickCylinder= (PickCylinder) pickShape;

	    while (i < stripIndexCounts.length) {  
                vtxIndexArr[0] = indexCoord[count];
		getVertexData(indexCoord[count++], pnts[0]);
		scount =  stripIndexCounts[i++];
		for (j=1; j < scount; j++) {
                    vtxIndexArr[1] = indexCoord[count];
		    getVertexData(indexCoord[count++], pnts[1]);
		    if (intersectCylinder(pnts, pickCylinder, sdist, iPnt)) {