Finds a region code for a circle against this rectangle's bounds Outer region codes are returned if the circle is totally within the region. - Java java.lang

Java examples for java.lang:Math Geometry Shape

  1. HOME
  2. Java
  3. java.lang
  4. Math Geometry Shape

Description

Finds a region code for a circle against this rectangle's bounds Outer region codes are returned if the circle is totally within the region.

Demo Code

/*/*from   w ww . ja va2s  .  co  m*/
 * Copyright (c) 2003-onwards Shaven Puppy Ltd
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Shaven Puppy' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
//package com.java2s;

public class Main {
    public static final int CENTER_CENTER = 0x00000000;
    public static final int LEFT_CODE = 0x00F00000;
    public static final int RIGHT_CODE = 0x000F0000;
    public static final int TOP_CODE = 0x0000F000;
    public static final int BOTTOM_CODE = 0x00000F00;

    /** Finds a region code for a circle against this rectangle's bounds
     *  Outer region codes are returned if the circle is totally within the region.
     *  Otherwise we return CENTER_CENTER.
     *
     *  NB: This means that CENTER_CENTER could indicate total containment or spanning an edge.
     */
    public static int findRegionForCircle(float x, float y, float radius,
            float rx, float ry, float width, float height) {

        int region = CENTER_CENTER;

        if (x + radius < rx) {
            region |= LEFT_CODE;
        } else if (x - radius > rx + width) {
            region |= RIGHT_CODE;
        }

        if (y + radius < ry) {
            region |= BOTTOM_CODE;
        } else if (y - radius > ry + height) {
            region |= TOP_CODE;
        }

        return region;
    }
}

Related Tutorials