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