155 lines
4.3 KiB
C++
155 lines
4.3 KiB
C++
//////////////////////////////////////////////////////////////////////////////////
|
|
// SPARK particle engine //
|
|
// Copyright (C) 2008-2009 - Julien Fryer - julienfryer@gmail.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. //
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#ifndef H_SPK_AABOX
|
|
#define H_SPK_AABOX
|
|
|
|
#include "Core/SPK_Zone.h"
|
|
|
|
namespace SPK
|
|
{
|
|
/**
|
|
* @class AABox
|
|
* @brief A Zone defining an axis-aligned Box
|
|
*
|
|
* An AABox is defined by its center and a dimension in each axis.
|
|
*/
|
|
class SPK_PREFIX AABox : public Zone
|
|
{
|
|
SPK_IMPLEMENT_REGISTERABLE(AABox)
|
|
|
|
public :
|
|
|
|
/////////////////
|
|
// Constructor //
|
|
/////////////////
|
|
|
|
/**
|
|
* @brief Constructor of AABox
|
|
* @param position : the position of the AABox
|
|
* @param dimension : the dimension of the AABox
|
|
*/
|
|
AABox(const Vector3D& position = Vector3D(0.0f,0.0f,0.0f),const Vector3D& dimension = Vector3D(0.0f,0.0f,0.0f));
|
|
|
|
/**
|
|
* @brief Creates and registers a new AABox
|
|
* @param position : the position of the AABox
|
|
* @param dimension : the dimension of the AABox
|
|
* @since 1.04.00
|
|
*/
|
|
static inline AABox* create(const Vector3D& position = Vector3D(0.0f,0.0f,0.0f),const Vector3D& dimension = Vector3D(0.0f,0.0f,0.0f));
|
|
|
|
////////////
|
|
// Setter //
|
|
////////////
|
|
|
|
/**
|
|
* @brief Sets the dimensions of this AABox
|
|
*
|
|
* The negative dimensions are clamped to 0.<br>
|
|
* An AABox with 0 as its 3 dimensions is equivalent to a Point
|
|
*
|
|
* @param dimension : the dimensions of this AABox
|
|
*/
|
|
void setDimension(const Vector3D& dimension);
|
|
|
|
////////////
|
|
// Getter //
|
|
////////////
|
|
|
|
/**
|
|
* @brief Gets the dimensions of this AABox
|
|
* @return the dimensions of this AABox
|
|
*/
|
|
inline const Vector3D& getDimension() const;
|
|
|
|
///////////////
|
|
// Interface //
|
|
///////////////
|
|
|
|
virtual void generatePosition(Particle& particle,bool full) const;
|
|
virtual bool contains(const Vector3D& v) const;
|
|
virtual bool intersects(const Vector3D& v0,const Vector3D& v1,Vector3D* intersection,Vector3D* normal) const;
|
|
virtual void moveAtBorder(Vector3D& v,bool inside) const;
|
|
virtual Vector3D computeNormal(const Vector3D& point) const;
|
|
|
|
private :
|
|
|
|
Vector3D dimension;
|
|
|
|
inline bool slabIntersects(float p0,float p1,float bMin,float bMax,float& tEnter,float& tExit,int& firstAxis,int axis) const;
|
|
};
|
|
|
|
|
|
inline AABox* AABox::create(const Vector3D& position,const Vector3D& dimension)
|
|
{
|
|
AABox* obj = new AABox(position,dimension);
|
|
registerObject(obj);
|
|
return obj;
|
|
}
|
|
|
|
inline const Vector3D& AABox::getDimension() const
|
|
{
|
|
return dimension;
|
|
}
|
|
|
|
inline bool AABox::slabIntersects(float p0,float p1,float bMin,float bMax,float& tEnter,float& tExit,int& firstAxis,int axis) const
|
|
{
|
|
float dir = p1 - p0;
|
|
|
|
if (dir == 0.0f)
|
|
{
|
|
if ((p0 < bMin)||(p0 > bMax))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
float t0 = (bMin - p0) / dir;
|
|
float t1 = (bMax - p0) / dir;
|
|
|
|
if (t0 > t1)
|
|
{
|
|
std::swap(t0,t1);
|
|
axis += 3;
|
|
}
|
|
|
|
if ((t1 < tEnter)||(t0 > tExit))
|
|
return false;
|
|
|
|
if (t0 > tEnter)
|
|
{
|
|
tEnter = t0;
|
|
firstAxis = (firstAxis & 0xF0) | (axis & 0x0F);
|
|
}
|
|
|
|
if (t1 < tExit)
|
|
{
|
|
tExit = t1;
|
|
firstAxis = (firstAxis & 0x0F) | ((axis << 4) & 0xF0);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
#endif
|