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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
*/
package net.java.joglutils.msg.math;
/** Utility math routines. */
public class MathUtil {
/** Makes an arbitrary vector perpendicular to <B>src</B> and
inserts it into <B>dest</B>. Returns false if the source vector
was equal to (0, 0, 0). */
public static boolean makePerpendicular(Vec3f src,
Vec3f dest) {
if ((src.x() == 0.0f) && (src.y() == 0.0f) && (src.z() == 0.0f)) {
return false;
}
if (src.x() != 0.0f) {
if (src.y() != 0.0f) {
dest.set(-src.y(), src.x(), 0.0f);
} else {
dest.set(-src.z(), 0.0f, src.x());
}
} else {
dest.set(1.0f, 0.0f, 0.0f);
}
return true;
}
/** Returns 1 if the sign of the given argument is positive; -1 if
negative; 0 if 0. */
public static int sgn(float f) {
if (f > 0) {
return 1;
} else if (f < 0) {
return -1;
}
return 0;
}
/** Clamps argument between min and max values. */
public static float clamp(float val, float min, float max) {
if (val < min) return min;
if (val > max) return max;
return val;
}
/** Clamps argument between min and max values. */
public static int clamp(int val, int min, int max) {
if (val < min) return min;
if (val > max) return max;
return val;
}
}
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