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Diffstat (limited to 'src/javax/media/j3d/PickCylinder.java')
-rw-r--r-- | src/javax/media/j3d/PickCylinder.java | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/javax/media/j3d/PickCylinder.java b/src/javax/media/j3d/PickCylinder.java new file mode 100644 index 0000000..ff590a1 --- /dev/null +++ b/src/javax/media/j3d/PickCylinder.java @@ -0,0 +1,117 @@ +/* + * 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; +import javax.vecmath.Vector4d; + +/** + * PickCylinder is the abstract base class of all cylindrical pick shapes. + * + * @since Java 3D 1.2 + */ +public abstract class PickCylinder extends PickShape { + + Point3d origin; + Vector3d direction; + double radius; + + /** + * Constructs an empty PickCylinder. + * The origin of the cylinder is + * initialized to (0,0,0). The radius is initialized + * to 0. + */ + public PickCylinder() { + origin = new Point3d(); + direction = new Vector3d(); + radius = 0.0; + } + + /** + * Gets the origin point of this cylinder object. + * @param origin the Point3d object into which the origin + * point will be copied + */ + public void getOrigin(Point3d origin) { + origin.set(this.origin); + } + + /** + * Gets the radius of this cylinder object + * @return the radius in radians + */ + public double getRadius() { + return radius; + } + + /** + * Gets the direction of this cylinder. + * @param direction the Vector3d object into which the direction + * will be copied + */ + public void getDirection(Vector3d direction) { + direction.set(this.direction); + } + + /** + * Return true if shape intersect with bounds. + * The point of intersection is stored in pickPos. + */ + @Override + abstract boolean intersect(Bounds bounds, Point4d pickPos); + + // This is a duplicate of the same method, declared private inside of + // BoundingPolytope + // XXXX: remove this once the original method is available (public) in + // BoundingPolytope + static boolean pointInPolytope(BoundingPolytope ptope, + double x, double y, double z ){ + Vector4d p; + int i = ptope.planes.length - 1; + + while (i >= 0) { + p = ptope.planes[i--]; + if (( x*p.x + y*p.y + z*p.z + p.w ) > Bounds.EPSILON) { + return false; + } + } + return true; + } + + @Override + Point3d getStartPoint() { + return origin; + } + + @Override + int getPickType() { + return PICKCYLINDER; + } +} |