/*
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* Java port of Bullet (c) 2008 Martin Dvorak <jezek2@advel.cz>
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*
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* This source file is part of GIMPACT Library.
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*
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* For the latest info, see http://gimpact.sourceforge.net/
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*
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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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*
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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
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* the use of this software.
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*
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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
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* 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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package com.bulletphysics.extras.gimpact;
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import com.bulletphysics.linearmath.VectorUtil;
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import cz.advel.stack.Stack;
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import javax.vecmath.Vector3f;
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/**
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*
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* @author jezek2
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*/
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class Quantization {
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public static void bt_calc_quantization_parameters(Vector3f outMinBound, Vector3f outMaxBound, Vector3f bvhQuantization, Vector3f srcMinBound, Vector3f srcMaxBound, float quantizationMargin) {
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// enlarge the AABB to avoid division by zero when initializing the quantization values
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Vector3f clampValue = Stack.alloc(Vector3f.class);
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clampValue.set(quantizationMargin, quantizationMargin, quantizationMargin);
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outMinBound.sub(srcMinBound, clampValue);
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outMaxBound.add(srcMaxBound, clampValue);
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Vector3f aabbSize = Stack.alloc(Vector3f.class);
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aabbSize.sub(outMaxBound, outMinBound);
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bvhQuantization.set(65535.0f, 65535.0f, 65535.0f);
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VectorUtil.div(bvhQuantization, bvhQuantization, aabbSize);
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}
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public static void bt_quantize_clamp(short[] out, Vector3f point, Vector3f min_bound, Vector3f max_bound, Vector3f bvhQuantization) {
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Vector3f clampedPoint = (Vector3f) Stack.alloc(point);
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VectorUtil.setMax(clampedPoint, min_bound);
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VectorUtil.setMin(clampedPoint, max_bound);
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Vector3f v = Stack.alloc(Vector3f.class);
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v.sub(clampedPoint, min_bound);
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VectorUtil.mul(v, v, bvhQuantization);
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out[0] = (short) (v.x + 0.5f);
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out[1] = (short) (v.y + 0.5f);
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out[2] = (short) (v.z + 0.5f);
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}
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public static Vector3f bt_unquantize(short[] vecIn, Vector3f offset, Vector3f bvhQuantization, Vector3f out) {
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out.set((float)(vecIn[0] & 0xFFFF) / (bvhQuantization.x),
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(float)(vecIn[1] & 0xFFFF) / (bvhQuantization.y),
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(float)(vecIn[2] & 0xFFFF) / (bvhQuantization.z));
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out.add(offset);
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return out;
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}
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}
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