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/* -*-c++-*-
*/
//****************************************************************************//
// loader.cpp //
// Copyright (C) 2001, 2002 Bruno 'Beosil' Heidelberger //
//****************************************************************************//
// This library is free software; you can redistribute it and/or modify it //
// under the terms of the GNU Lesser General Public License as published by //
// the Free Software Foundation; either version 2.1 of the License, or (at //
// your option) any later version. //
//****************************************************************************//
/*****************************************************************************/
/* Loads a core compressed keyframe instance.
*
* This function loads a core compressed keyframe instance from a data source.
*
* @param dataSrc The data source to load the core compressed keyframe instance from.
*
* @return One of the following values:
* \li a pointer to the core keyframe
* \li \b 0 if an error happened
* Authors
* Igor Kravchenko
* Cedric Pinson <mornifle@plopbyte.net>
*****************************************************************************/
#ifndef OSGANIMATION_PACKED_H
#define OSGANIMATION_PACKED_H
#include <float.h>
#include <vector>
#include <osg/Vec3>
#include <osg/Math>
namespace osgAnimation
{
struct Vec3Packed
{
typedef unsigned int uint32_t;
uint32_t m32bits;
Vec3Packed(uint32_t val): m32bits(val) {}
Vec3Packed(): m32bits(0) {}
void uncompress(const osg::Vec3& scale, const osg::Vec3& min, osg::Vec3& result) const
{
uint32_t pt[3];
pt[0] = m32bits & 0x7ff;
pt[1] = (m32bits >> 11) & 0x7ff;
pt[2] = m32bits >> 22;
result[0] = scale[0] * pt[0] + min[0];
result[1] = scale[1] * pt[1] + min[1];
result[2] = scale[2] * pt[2] + min[2];
}
void compress(const osg::Vec3f& src, const osg::Vec3f& min, const osg::Vec3f& scaleInv)
{
uint32_t srci[3];
srci[0] = osg::minimum(static_cast<uint32_t>(((src[0] - min[0] )*scaleInv[0])), uint32_t(2047));
srci[1] = osg::minimum(static_cast<uint32_t>(((src[1] - min[1] )*scaleInv[1])), uint32_t(2047));
srci[2] = osg::minimum(static_cast<uint32_t>(((src[2] - min[2] )*scaleInv[2])), uint32_t(1023));
m32bits = srci[0] + (srci[1] << 11) + (srci[2] << 22);
}
};
struct Vec3ArrayPacked
{
std::vector<Vec3Packed> mVecCompressed;
osg::Vec3 mMin;
osg::Vec3 mScale;
osg::Vec3 mScaleInv;
void analyze(const std::vector<osg::Vec3>& src)
{
//analyze the keys
mMin.set(FLT_MAX, FLT_MAX, FLT_MAX);
osg::Vec3 maxp(-FLT_MAX, -FLT_MAX, -FLT_MAX);
int nb = (int)src.size();
for(int i = 0; i < nb; i++)
{
const osg::Vec3 &pos = src[i];
for(int j = 0; j < 3; j++)
{
maxp[j] = osg::maximum(pos[j],maxp[j]);
mMin[j] = osg::minimum(pos[j],mMin[j]);
}
}
osg::Vec3 diff = maxp - mMin;
mScaleInv.set(0,0,0);
if (diff[0] != 0)
mScaleInv[0] = 2047.0/diff[0];
if (diff[1] != 0)
mScaleInv[1] = 2047.0/diff[1];
if (diff[2] != 0)
mScaleInv[2] = 1023.0/diff[2];
mScale[0] = diff[0] / 2047;
mScale[1] = diff[1] / 2047;
mScale[2] = diff[2] / 1023;
}
void compress(const std::vector<osg::Vec3>& src)
{
mVecCompressed.resize(src.size());
// save all core keyframes
for(int i = 0; i < (int)src.size(); i++)
mVecCompressed[i].compress(src[i], mMin, mScaleInv);
}
};
}
#endif
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