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