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Diffstat (limited to 'src/javax/media/j3d/PickConeSegment.java')
| -rw-r--r-- | src/javax/media/j3d/PickConeSegment.java | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/src/javax/media/j3d/PickConeSegment.java b/src/javax/media/j3d/PickConeSegment.java deleted file mode 100644 index b7b7f62..0000000 --- a/src/javax/media/j3d/PickConeSegment.java +++ /dev/null @@ -1,306 +0,0 @@ -/* - * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Sun designates this - * particular file as subject to the "Classpath" exception as provided - * by Sun in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, - * CA 95054 USA or visit www.sun.com if you need additional information or - * have any questions. - * - */ - -package javax.media.j3d; - -import javax.vecmath.Point3d; -import javax.vecmath.Point4d; -import javax.vecmath.Vector3d; - -/** - * PickConeSegment is a finite cone segment pick shape. It can - * be used as an argument to the picking methods in BranchGroup and Locale. - * - * @see BranchGroup#pickAll - * @see Locale#pickAll - * - * @since Java 3D 1.2 - */ -public final class PickConeSegment extends PickCone { - - Point3d end; - - /** - * Constructs an empty PickConeSegment. - * The origin and end point of the cone are - * initialized to (0,0,0). The spread angle is initialized - * to <code>PI/64</code> radians. - */ - public PickConeSegment() { - end = new Point3d(); - } - - /** - * Constructs a finite cone pick shape from the specified - * parameters. - * @param origin the origin of the cone - * @param end the end of the cone along the direction vector - * @param spreadAngle the spread angle of the cone in radians - */ - public PickConeSegment (Point3d origin, Point3d end, double spreadAngle) { - this.origin = new Point3d(origin); - this.end = new Point3d(end); - this.direction = new Vector3d(); - this.spreadAngle = spreadAngle; - calcDirection(); // calculate direction, based on start and end - } - - /** - * Sets the parameters of this PickCone to the specified values. - * @param origin the origin of the cone - * @param end the end of the cone - * @param spreadAngle the spread angle of the cone in radians - */ - public void set(Point3d origin, Point3d end, double spreadAngle) { - this.origin.set(origin); - this.end.set (end); - this.spreadAngle = spreadAngle; - calcDirection(); // calculate direction, based on start and end - } - - /** - * Gets the end point of this PickConeSegment. - * @param end the Point3d object into which the end point - * will be copied. - */ - public void getEnd(Point3d end) { - end.set(this.end); - } - - /** Calculates the direction for this PickCylinderSegment, based on start - and end points. - */ - private void calcDirection() { - this.direction.x = end.x - origin.x; - this.direction.y = end.y - origin.y; - this.direction.z = end.z - origin.z; - } - - /** - * Return true if shape intersect with bounds. - * The point of intersection is stored in pickPos. - * @param bounds the bounds object to check - * @param pickPos the location of the point of intersection (not used for - * method. Provided for compatibility). - */ - @Override - final boolean intersect(Bounds bounds, Point4d pickPos) { - Point4d iPnt = new Point4d(); - Vector3d vector = new Vector3d(); - Point3d rayPt = new Point3d(); - - double distance; - double radius; - - // - // ================ BOUNDING SPHERE ================ - // - if (bounds instanceof BoundingSphere) { - Point3d sphCenter = ((BoundingSphere)bounds).getCenter(); - double sphRadius = ((BoundingSphere)bounds).getRadius(); - double sqDist = Utils.ptToSegSquare(sphCenter, origin, end, rayPt); - - vector.sub (rayPt, origin); - distance = vector.length(); - radius = getRadius (distance); - if (sqDist <= (sphRadius+radius)*(sphRadius+radius)) { - return true; - } - return false; // we are too far to intersect - } - // - // ================ BOUNDING BOX ================ - // - else if (bounds instanceof BoundingBox) { - // Calculate radius of BoundingBox - Point3d lower = new Point3d(); - ((BoundingBox)bounds).getLower (lower); - - Point3d center = ((BoundingBox)bounds).getCenter (); - - // First, see if cone is too far away from BoundingBox - double sqDist = Utils.ptToSegSquare(center, origin, end, rayPt); - - vector.sub (rayPt, origin); - distance = vector.length(); - radius = getRadius (distance); - - double temp = (center.x - lower.x + radius); - double boxRadiusSquared = temp*temp; - temp = (center.y - lower.y + radius); - boxRadiusSquared += temp*temp; - temp = (center.z - lower.z + radius); - boxRadiusSquared += temp*temp; - - if (sqDist > boxRadiusSquared) { - return false; // we are too far to intersect - } - else if (sqDist < (radius*radius)) { - return true; // center is in cone - } - - // Then, see if ray intersects - if (((BoundingBox)bounds).intersect (origin, direction, iPnt)) { - return true; - } - - // Ray does not intersect, test for distance with each edge - Point3d upper = new Point3d(); - ((BoundingBox)bounds).getUpper (upper); - - Point3d[][] edges = { - // Top horizontal 4 - {upper, new Point3d (lower.x, upper.y, upper.z)}, - {new Point3d(lower.x, upper.y, upper.z), new Point3d(lower.x, lower.y, upper.z)}, - {new Point3d(lower.x, lower.y, upper.z), new Point3d(upper.x, lower.y, upper.z)}, - {new Point3d(upper.x, lower.y, upper.z), upper}, - // Bottom horizontal 4 - {lower, new Point3d(lower.x, upper.y, lower.z)}, - {new Point3d(lower.x, upper.y, lower.z), new Point3d(upper.x, upper.y, lower.z)}, - {new Point3d(upper.x, upper.y, lower.z), new Point3d(upper.x, lower.y, lower.z)}, - {new Point3d(upper.x, lower.y, lower.z), lower}, - // Vertical 4 - {lower, new Point3d(lower.x, lower.y, upper.z)}, - {new Point3d(lower.x, upper.y, lower.z), new Point3d(lower.x, upper.y, upper.z)}, - {new Point3d(upper.x, upper.y, lower.z), new Point3d(upper.x, upper.y, upper.z)}, - {new Point3d(upper.x, lower.y, lower.z), new Point3d(upper.x, lower.y, upper.z)} - }; - for (int i=0;i<edges.length;i++) { - // System.err.println ("Testing edge: "+edges[i][0]+" - "+edges[i][1]); - double distToEdge = - Utils.segmentToSegment (origin, end, edges[i][0], edges[i][1], - rayPt, null, null); - - vector.sub (rayPt, origin); - distance = vector.length(); - radius = getRadius (distance); - /* System.err.println ("PickConeSegment: distance: " + - distance+" radius: " + radius + - " distToEdge:" +Math.sqrt(distToEdge)); - */ - - if (distToEdge <= radius*radius) { - // System.err.println ("Intersects!"); - return true; - } - } - return false; // Not close enough - } - // - // ================ BOUNDING POLYTOPE ================ - // - else if (bounds instanceof BoundingPolytope) { - int i, j; - - // First, check to see if we are too far to intersect the polytope's - // bounding sphere - Point3d sphCenter = new Point3d(); - BoundingSphere bsphere = new BoundingSphere (bounds); - - bsphere.getCenter (sphCenter); - double sphRadius = bsphere.getRadius(); - - double sqDist = Utils.ptToSegSquare(sphCenter, origin, end, rayPt); - - vector.sub (rayPt, origin); - distance = vector.length(); - radius = getRadius (distance); - - if (sqDist > (sphRadius+radius)*(sphRadius+radius)) { - return false; // we are too far to intersect - } - - // Now check to see if ray intersects with polytope - if (bounds.intersect (origin, direction, iPnt)) { - return true; - } - - // Now check distance to edges. Since we don't know a priori how - // the polytope is structured, we will cycle through. We discard edges - // when their center is not on the polytope surface. - BoundingPolytope ptope = (BoundingPolytope)bounds; - Point3d midpt = new Point3d(); - double distToEdge; - for (i=0;i<ptope.nVerts;i++) { - for (j=i;i<ptope.nVerts;i++) { - // XXXX: make BoundingPolytope.pointInPolytope available to package - // scope - midpt.x = (ptope.verts[i].x + ptope.verts[j].x) * 0.5; - midpt.y = (ptope.verts[i].y + ptope.verts[j].y) * 0.5; - midpt.z = (ptope.verts[i].z + ptope.verts[j].z) * 0.5; - - if (! PickCylinder.pointInPolytope (ptope, - midpt.x, midpt.y, midpt.z)) { - continue; - } - distToEdge = - Utils.segmentToSegment (origin, end, - ptope.verts[i], ptope.verts[j], - rayPt, null, null); - vector.sub (rayPt, origin); - distance = vector.length(); - radius = getRadius (distance); - if (distToEdge <= radius*radius) { - return true; - } - } - } - return false; - } - /* - else { - throw new RuntimeException("intersect method not implemented"); - } - */ - return false; - } - - // Only use within J3D. - // Return a new PickConeSegment that is the transformed (t3d) of this pickConeSegment. - @Override - PickShape transform(Transform3D t3d) { - - PickConeSegment newPCS = new PickConeSegment(); - - newPCS.origin.x = origin.x; - newPCS.origin.y = origin.y; - newPCS.origin.z = origin.z; - newPCS.spreadAngle = spreadAngle; - newPCS.end.x = end.x; - newPCS.end.y = end.y; - newPCS.end.z = end.z; - - t3d.transform(newPCS.origin); - t3d.transform(newPCS.end); - - newPCS.direction.x = newPCS.end.x - newPCS.origin.x; - newPCS.direction.y = newPCS.end.y - newPCS.origin.y; - newPCS.direction.z = newPCS.end.z - newPCS.origin.z; - newPCS.direction.normalize(); - - return newPCS; - } -} |