diff options
| author | Sven Gothel <sgothel@jausoft.com> | 2023-09-20 19:51:55 +0200 |
|---|---|---|
| committer | Sven Gothel <sgothel@jausoft.com> | 2023-09-20 19:51:55 +0200 |
| commit | 5d6e8a367c03644740187e500c6de5d3ac039d5e (patch) | |
| tree | a649f559413c51272ee3f4afff1f68ebfea45477 /src/jogl/classes/com/jogamp/math/Binary32.java | |
| parent | bbe845846ffc00807395a5070a7352c6bbe7e4ef (diff) | |
Bug 1452 - Decouple math functionality to 'com.jogamp.math' to be toolkit agnostic (PMVMatrix, Matrix4f, Vec4f, ..)
Math functionality (PMVMatrix, Matrix4f, Vec4f, ..)
- shall be used toolkit agnostic, e.g. independent from OpenGL
- shall be reused within our upcoming Vulkan implementation
- may also move outside of JOGL, i.e. GlueGen or within its own package to be reused for other purposed.
The 'com.jogamp.opengl.util.PMVMatrix' currently also used to feed in GLUniformData
via the toolkit agnostic SyncAction and SyncBuffer
shall also be split to a toolkit agnostic variant.
An OpenGL PMVMatrix specialization implementing GLMatrixFunc can still exist,
being derived from the toolkit agnostic base implementation.
+++
Initial commit .. compile clean, passing most unit tests.
Diffstat (limited to 'src/jogl/classes/com/jogamp/math/Binary32.java')
| -rw-r--r-- | src/jogl/classes/com/jogamp/math/Binary32.java | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/math/Binary32.java b/src/jogl/classes/com/jogamp/math/Binary32.java new file mode 100644 index 000000000..398f97c3a --- /dev/null +++ b/src/jogl/classes/com/jogamp/math/Binary32.java @@ -0,0 +1,116 @@ +/** + * Copyright 2013 JogAmp Community. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community 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. + * + * The views and conclusions contained in the software and documentation are those of the + * authors and should not be interpreted as representing official policies, either expressed + * or implied, of JogAmp Community. + */ + +package com.jogamp.math; + +/** + * Functions for interrogating <code>binary32</code> (float) values. + */ + +public final class Binary32 +{ + static final int NEGATIVE_ZERO_BITS; + static final int MASK_SIGN; + static final int MASK_EXPONENT; + static final int MASK_SIGNIFICAND; + static final int BIAS; + + static { + NEGATIVE_ZERO_BITS = 0x80000000; + MASK_SIGN = 0x80000000; + MASK_EXPONENT = 0x7ff00000; + MASK_SIGNIFICAND = 0x7fffff; + BIAS = 127; + } + + /** + * <p> + * Extract and unbias the exponent of the given packed <code>float</code> + * value. + * </p> + * <p> + * The exponent is encoded <i>biased</i> as a number in the range + * <code>[0, 255]</code>, with <code>0</code> indicating that the number is + * <i>subnormal</i> and <code>[1, 254]</code> denoting the actual exponent + * plus {@link #BIAS}. Infinite and <code>NaN</code> values always have a + * biased exponent of <code>255</code>. + * </p> + * <p> + * This function will therefore return: + * </p> + * <ul> + * <li> + * <code>0 - {@link #BIAS} = -127</code> iff the input is a <i>subnormal</i> + * number.</li> + * <li>An integer in the range + * <code>[1 - {@link #BIAS}, 254 - {@link #BIAS}] = [-126, 127]</code> iff + * the input is a <i>normal</i> number.</li> + * <li> + * <code>255 - {@link #BIAS} = 128</code> iff the input is + * {@link #POSITIVE_INFINITY}, {@link #NEGATIVE_INFINITY}, or + * <code>NaN</code>.</li> + * </ul> + * + * @see #packSetExponentUnbiasedUnchecked(int) + */ + + public static int unpackGetExponentUnbiased( + final float d) + { + final int b = Float.floatToRawIntBits(d); + final int em = b & Binary32.MASK_EXPONENT; + final int es = em >> 23; + return es - Binary32.BIAS; + } + + /** + * <p> + * Return the sign of the given float value. + * </p> + */ + + public static int unpackGetSign( + final float d) + { + final int b = Float.floatToRawIntBits(d); + return ((b & Binary32.MASK_SIGN) >> 31) & 1; + } + + /** + * <p> + * Return the significand of the given float value. + * </p> + */ + + public static int unpackGetSignificand( + final float d) + { + final int b = Float.floatToRawIntBits(d); + return b & Binary32.MASK_SIGNIFICAND; + } +} |