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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the declaration of BoundingBox which is a class that
// represents an Axis Aligned Bounding Box. It also contains the declaration of
// ParamBoundingBox, a Param that cointains a BoundingBox as well as
// ParamBindFloat3sToBoundingBox which is a ParamBind that takes 2 Float3s and
// converts them to a BoundingBox.
#ifndef O3D_CORE_CROSS_BOUNDING_BOX_H_
#define O3D_CORE_CROSS_BOUNDING_BOX_H_
#include "core/cross/types.h"
#include "core/cross/param.h"
namespace o3d {
class RayIntersectionInfo;
// Defines a class that represents an Axis Aligned Bounding Box.
class BoundingBox {
public:
// Constructs an uninitialized BoundingBox marking it as non valid.
BoundingBox() : valid_(false), min_extent_(0, 0, 0), max_extent_(0, 0, 0) { }
// Constructs a BoundingBox.
// Parameters:
// min_extent: minimum corner of the box.
// max_extent: maximum corner of the box.
BoundingBox(const Point3& min_extent, const Point3& max_extent)
: valid_(true),
min_extent_(Vectormath::Aos::minPerElem(min_extent, max_extent)),
max_extent_(Vectormath::Aos::maxPerElem(min_extent, max_extent)) {
}
// True if this bounding box has been initialized.
// Returns:
// true if this bounding box has been initialized.
bool valid() const {
return valid_;
}
// The min extent of the box.
// Returns:
// the min extent of the box. If the box is not valid the return value
// is undefined.
const Point3& min_extent() const {
return min_extent_;
}
// The max extent of the box.
// Returns:
// the max extent of the box. If the box is not valid the return value
// is undefined.
const Point3& max_extent() const {
return max_extent_;
}
// Computing the bounding box of this box re-oriented by multiplying by a
// Matrix4.
// Paramaters:
// matrix: Matrix4 to multiple by.
// result: pointer to bounding box to store the result.
void Mul(const Matrix4& matrix, BoundingBox* result) const;
// Adds a bounding box to this box producing a bounding box that contains
// both. If one box is invalid the result is the other box. If both boxes are
// invalid the result will be an invalid box.
// Parameters:
// box: bounding box to add to this box.
// result: pointer to bounding box to store the result.
void Add(const BoundingBox& box, BoundingBox* result) const;
// Checks if a ray defined in same coordinate system as this box intersects
// this bounding box.
// Parameters:
// start: position of start of ray in local space.
// end: position of end of ray in local space.
// result: RayIntersectionInfo structure to fill out with results. If
// result->valid() is false then something was wrong like using this
// function with an uninitialized bounding box. If result->intersected()
// is true then the ray intersected the box and result->position() is
// the exact point of intersection.
void IntersectRay(const Point3& start,
const Point3& end,
RayIntersectionInfo* result) const;
// Returns true if the bounding box is inside the frustum.
// Parameter:
// matrix: Matrix to transform the box from its local space to view frustum
// space.
bool InFrustum(const Matrix4& matrix) const;
private:
bool valid_; // true if this bounding box has been initialized.
Point3 min_extent_;
Point3 max_extent_;
};
// A Param that contains a bounding box.
class ParamBoundingBox : public TypedParam<BoundingBox> {
public:
typedef SmartPointer<ParamBoundingBox> Ref;
protected:
ParamBoundingBox(ServiceLocator* service_locator,
bool dynamic,
bool read_only)
: TypedParam<BoundingBox>(service_locator, dynamic, read_only) {
}
private:
friend class IClassManager;
static ObjectBase::Ref Create(ServiceLocator* service_locator);
O3D_DECL_CLASS(ParamBoundingBox, Param);
DISALLOW_COPY_AND_ASSIGN(ParamBoundingBox);
};
#if 0 // TODO: change this to a ParamOperation
// A bind operation of 2 Float3s into a bounding box.
class ParamBindFloat3sToBoundingBox : public ParamBind {
public:
typedef SmartPointer<ParamBindFloat3sToBoundingBox> Ref;
static const char* kInput1Name;
static const char* kInput2Name;
static const char* kOutputName;
// Creates a BoundingBox from 2 Float3s.
virtual void ComputeDestinationValues();
private:
explicit ParamBindFloat3sToBoundingBox(ServiceLocator* service_locator);
friend class IClassManager;
static ObjectBase::Ref Create(ServiceLocator* service_locator);
// The source Params.
TypedBindConnection<ParamFloat3>* source_bind_connection_1_;
TypedBindConnection<ParamFloat3>* source_bind_connection_2_;
// The dest Param.
TypedBindConnection<ParamBoundingBox>* destination_bind_connection_;
O3D_DECL_CLASS(ParamBindFloat3sToBoundingBox, ParamBind)
DISALLOW_COPY_AND_ASSIGN(ParamBindFloat3sToBoundingBox);
};
#endif
} // namespace o3d
#endif // O3D_CORE_CROSS_BOUNDING_BOX_H_
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