mirror of https://github.com/axmolengine/axmol.git
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
|
#ifndef BT_GIMPACT_QUANTIZATION_H_INCLUDED
|
||
|
|
#define BT_GIMPACT_QUANTIZATION_H_INCLUDED
|
||
|
|
|
||
|
|
/*! \file btQuantization.h
|
||
|
|
*\author Francisco Leon Najera
|
||
|
|
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
This source file is part of GIMPACT Library.
|
||
|
|
|
||
|
|
For the latest info, see http://gimpact.sourceforge.net/
|
||
|
|
|
||
|
|
Copyright (c) 2007 Francisco Leon Najera. C.C. 80087371.
|
||
|
|
email: projectileman@yahoo.com
|
||
|
|
|
||
|
|
|
||
|
|
This software is provided 'as-is', without any express or implied warranty.
|
||
|
|
In no event will the authors be held liable for any damages arising from the use of this software.
|
||
|
|
Permission is granted to anyone to use this software for any purpose,
|
||
|
|
including commercial applications, and to alter it and redistribute it freely,
|
||
|
|
subject to the following restrictions:
|
||
|
|
|
||
|
|
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
|
||
|
|
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
|
||
|
|
3. This notice may not be removed or altered from any source distribution.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "LinearMath/btTransform.h"
|
||
|
|
|
||
|
|
SIMD_FORCE_INLINE void bt_calc_quantization_parameters(
|
||
|
|
btVector3& outMinBound,
|
||
|
|
btVector3& outMaxBound,
|
||
|
|
btVector3& bvhQuantization,
|
||
|
|
const btVector3& srcMinBound, const btVector3& srcMaxBound,
|
||
|
|
btScalar quantizationMargin)
|
||
|
|
{
|
||
|
|
//enlarge the AABB to avoid division by zero when initializing the quantization values
|
||
|
|
btVector3 clampValue(quantizationMargin, quantizationMargin, quantizationMargin);
|
||
|
|
outMinBound = srcMinBound - clampValue;
|
||
|
|
outMaxBound = srcMaxBound + clampValue;
|
||
|
|
btVector3 aabbSize = outMaxBound - outMinBound;
|
||
|
|
bvhQuantization = btVector3(btScalar(65535.0),
|
||
|
|
btScalar(65535.0),
|
||
|
|
btScalar(65535.0)) /
|
||
|
|
aabbSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
SIMD_FORCE_INLINE void bt_quantize_clamp(
|
||
|
|
unsigned short* out,
|
||
|
|
const btVector3& point,
|
||
|
|
const btVector3& min_bound,
|
||
|
|
const btVector3& max_bound,
|
||
|
|
const btVector3& bvhQuantization)
|
||
|
|
{
|
||
|
|
btVector3 clampedPoint(point);
|
||
|
|
clampedPoint.setMax(min_bound);
|
||
|
|
clampedPoint.setMin(max_bound);
|
||
|
|
|
||
|
|
btVector3 v = (clampedPoint - min_bound) * bvhQuantization;
|
||
|
|
out[0] = (unsigned short)(v.getX() + 0.5f);
|
||
|
|
out[1] = (unsigned short)(v.getY() + 0.5f);
|
||
|
|
out[2] = (unsigned short)(v.getZ() + 0.5f);
|
||
|
|
}
|
||
|
|
|
||
|
|
SIMD_FORCE_INLINE btVector3 bt_unquantize(
|
||
|
|
const unsigned short* vecIn,
|
||
|
|
const btVector3& offset,
|
||
|
|
const btVector3& bvhQuantization)
|
||
|
|
{
|
||
|
|
btVector3 vecOut;
|
||
|
|
vecOut.setValue(
|
||
|
|
(btScalar)(vecIn[0]) / (bvhQuantization.getX()),
|
||
|
|
(btScalar)(vecIn[1]) / (bvhQuantization.getY()),
|
||
|
|
(btScalar)(vecIn[2]) / (bvhQuantization.getZ()));
|
||
|
|
vecOut += offset;
|
||
|
|
return vecOut;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // BT_GIMPACT_QUANTIZATION_H_INCLUDED
|