Added a generic AABB class
This commit is contained in:
Diren D Bharwani
parent
0b803d0bd1
commit
550b99b3d7
|
|
@ -0,0 +1,215 @@
|
|||
/****************************************************************************************
|
||||
* \file SHAABB.cpp
|
||||
* \author Diren D Bharwani, diren.dbharwani, 390002520
|
||||
* \brief Implementation for a 3-Dimensional Axis Aligned Bounding Box
|
||||
*
|
||||
* \copyright Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
|
||||
* disclosure of this file or its contents without the prior written consent
|
||||
* of DigiPen Institute of Technology is prohibited.
|
||||
****************************************************************************************/
|
||||
|
||||
#include <SHpch.h>
|
||||
|
||||
// Primary Header
|
||||
#include "SHAABB.h"
|
||||
// Project Headers
|
||||
#include "Math/SHMathHelpers.h"
|
||||
#include "Math/SHRay.h"
|
||||
|
||||
using namespace DirectX;
|
||||
|
||||
namespace SHADE
|
||||
{
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Constructors & Destructor Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
SHAABB::SHAABB() noexcept
|
||||
{
|
||||
Center = SHVec3::Zero;
|
||||
Extents = SHVec3::One * 0.5f;
|
||||
}
|
||||
|
||||
SHAABB::SHAABB(const SHVec3& c, const SHVec3& hE) noexcept
|
||||
{
|
||||
Center = c;
|
||||
Extents = hE;
|
||||
}
|
||||
|
||||
|
||||
SHAABB::SHAABB(const SHAABB& rhs) noexcept
|
||||
{
|
||||
if (this == &rhs)
|
||||
return;
|
||||
|
||||
Center = rhs.Center;
|
||||
Extents = rhs.Extents;
|
||||
}
|
||||
|
||||
SHAABB::SHAABB(SHAABB&& rhs) noexcept
|
||||
{
|
||||
Center = rhs.Center;
|
||||
Extents = rhs.Extents;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Operator Overload Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
SHAABB& SHAABB::operator=(const SHAABB& rhs) noexcept
|
||||
{
|
||||
Center = rhs.Center;
|
||||
Extents = rhs.Extents;
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
SHAABB& SHAABB::operator=(SHAABB&& rhs) noexcept
|
||||
{
|
||||
Center = rhs.Center;
|
||||
Extents = rhs.Extents;
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Getter Function Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
SHVec3 SHAABB::GetCenter() const noexcept
|
||||
{
|
||||
return Center;
|
||||
}
|
||||
|
||||
SHVec3 SHAABB::GetExtents() const noexcept
|
||||
{
|
||||
return Extents;
|
||||
}
|
||||
|
||||
SHVec3 SHAABB::GetMin() const noexcept
|
||||
{
|
||||
return SHVec3{ Center.x - Extents.x, Center.y - Extents.y, Center.z - Extents.z };
|
||||
}
|
||||
|
||||
SHVec3 SHAABB::GetMax() const noexcept
|
||||
{
|
||||
return SHVec3{ Center.x + Extents.x, Center.y + Extents.y, Center.z + Extents.z };
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Setter Function Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
void SHAABB::SetCenter(const SHVec3& newCenter) noexcept
|
||||
{
|
||||
Center = newCenter;
|
||||
}
|
||||
|
||||
void SHAABB::SetExtents(const SHVec3& newExtents) noexcept
|
||||
{
|
||||
Extents = newExtents;
|
||||
}
|
||||
|
||||
void SHAABB::SetMin(const SHVec3& min) noexcept
|
||||
{
|
||||
const SHVec3 MAX = GetMax();
|
||||
|
||||
Center = SHVec3::Lerp(min, MAX, 0.5f);
|
||||
Extents = SHVec3::Abs((MAX - min) * 0.5f);
|
||||
}
|
||||
|
||||
void SHAABB::SetMax(const SHVec3& max) noexcept
|
||||
{
|
||||
const SHVec3 MIN = GetMin();
|
||||
|
||||
Center = SHVec3::Lerp(MIN, max, 0.5f);
|
||||
Extents = SHVec3::Abs((max - MIN) * 0.5f);
|
||||
}
|
||||
|
||||
void SHAABB::SetMinMax(const SHVec3& min, const SHVec3& max) noexcept
|
||||
{
|
||||
Center = SHVec3::Lerp(min, max, 0.5f);
|
||||
Extents = SHVec3::Abs((max - min) * 0.5f);
|
||||
}
|
||||
|
||||
std::vector<SHVec3> SHAABB::GetVertices() const noexcept
|
||||
{
|
||||
std::vector<SHVec3> vertices{ 8 };
|
||||
GetCorners(vertices.data());
|
||||
return vertices;
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Public Function Member Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
bool SHAABB::TestPoint(const SHVec3& point) const noexcept
|
||||
{
|
||||
return BoundingBox::Contains(point);
|
||||
}
|
||||
|
||||
SHRaycastResult SHAABB::Raycast(const SHRay& ray) const noexcept
|
||||
{
|
||||
SHRaycastResult result;
|
||||
|
||||
result.hit = Intersects(ray.position, ray.direction, result.distance);
|
||||
if (result.hit)
|
||||
{
|
||||
result.position = ray.position + ray.direction * result.distance;
|
||||
result.angle = SHVec3::Angle(ray.position, result.position);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
bool SHAABB::Contains(const SHAABB& rhs) const noexcept
|
||||
{
|
||||
return BoundingBox::Contains(rhs) == CONTAINS;
|
||||
}
|
||||
|
||||
float SHAABB::Volume() const noexcept
|
||||
{
|
||||
return 8.0f * (Extents.x * Extents.y * Extents.z);
|
||||
}
|
||||
|
||||
float SHAABB::SurfaceArea() const noexcept
|
||||
{
|
||||
return 8.0f * ((Extents.x * Extents.y)
|
||||
+ (Extents.x * Extents.z)
|
||||
+ (Extents.y * Extents.z));
|
||||
}
|
||||
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Static Function Member Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
SHAABB SHAABB::Combine(const SHAABB& lhs, const SHAABB& rhs) noexcept
|
||||
{
|
||||
SHAABB result;
|
||||
CreateMerged(result, lhs, rhs);
|
||||
return result;
|
||||
}
|
||||
|
||||
bool SHAABB::Intersect(const SHAABB& lhs, const SHAABB& rhs) noexcept
|
||||
{
|
||||
return lhs.Intersects(rhs);
|
||||
}
|
||||
|
||||
SHAABB SHAABB::BuildFromBoxes(const SHAABB* boxes, size_t numBoxes) noexcept
|
||||
{
|
||||
SHAABB result;
|
||||
|
||||
for (size_t i = 1; i < numBoxes; ++i)
|
||||
CreateMerged(result, boxes[i - 1], boxes[i]);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
SHAABB SHAABB::BuildFromVertices(const SHVec3* vertices, size_t numVertices, size_t stride) noexcept
|
||||
{
|
||||
SHAABB result;
|
||||
CreateFromPoints(result, numVertices, vertices, stride);
|
||||
return result;
|
||||
}
|
||||
|
||||
} // namespace SHADE
|
||||
|
|
@ -0,0 +1,172 @@
|
|||
/****************************************************************************************
|
||||
* \file SHAABB.h
|
||||
* \author Diren D Bharwani, diren.dbharwani, 390002520
|
||||
* \brief Interface for a 3-Dimensional Axis Aligned Bounding Box
|
||||
*
|
||||
* \copyright Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
|
||||
* disclosure of this file or its contents without the prior written consent
|
||||
* of DigiPen Institute of Technology is prohibited.
|
||||
****************************************************************************************/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <DirectXCollision.h>
|
||||
|
||||
// Project Headers
|
||||
#include "Math/SHRay.h"
|
||||
|
||||
namespace SHADE
|
||||
{
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Type Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Encapsulates a 3D Axis-Aligned Bounding Box.
|
||||
*/
|
||||
class SH_API SHAABB : private DirectX::BoundingBox
|
||||
{
|
||||
public:
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Static Data Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
static constexpr size_t NUM_VERTICES = 8;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Constructors & Destructor */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
~SHAABB () noexcept = default;
|
||||
|
||||
SHAABB () noexcept;
|
||||
SHAABB (const SHVec3& center, const SHVec3& halfExtents) noexcept;
|
||||
SHAABB (const SHAABB& rhs) noexcept;
|
||||
SHAABB (SHAABB&& rhs) noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Operator Overloads */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
SHAABB& operator= (const SHAABB& rhs) noexcept;
|
||||
SHAABB& operator= (SHAABB&& rhs) noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Getter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
[[nodiscard]] SHVec3 GetCenter () const noexcept;
|
||||
[[nodiscard]] SHVec3 GetExtents () const noexcept;
|
||||
[[nodiscard]] SHVec3 GetMin () const noexcept;
|
||||
[[nodiscard]] SHVec3 GetMax () const noexcept;
|
||||
[[nodiscard]] std::vector<SHVec3> GetVertices () const noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Setter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
void SetCenter (const SHVec3& newCenter) noexcept;
|
||||
void SetExtents (const SHVec3& newExtents) noexcept;
|
||||
void SetMin (const SHVec3& min) noexcept;
|
||||
void SetMax (const SHVec3& max) noexcept;
|
||||
void SetMinMax (const SHVec3& min, const SHVec3& max) noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Member Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Checks if a point is inside the aabb.
|
||||
* @param point
|
||||
* The point to check.
|
||||
* @return
|
||||
* True if the point is inside the aabb.
|
||||
*/
|
||||
[[nodiscard]] bool TestPoint (const SHVec3& point) const noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Casts a ray against the aabb.
|
||||
* @param ray
|
||||
* The ray to cast.
|
||||
* @return
|
||||
* The result of the raycast. <br/>
|
||||
* See the corresponding header for the contents of the raycast result object.
|
||||
*/
|
||||
[[nodiscard]] SHRaycastResult Raycast (const SHRay& ray) const noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Checks if an entire other aabb is contained by this aabb.
|
||||
* @param rhs
|
||||
* The aabb to check.
|
||||
* @return
|
||||
* True if the other sphere is completely contained by this aabb.
|
||||
*/
|
||||
[[nodiscard]] bool Contains (const SHAABB& rhs) const noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Calculates the volume of the aabb.
|
||||
*/
|
||||
[[nodiscard]] float Volume () const noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Calculates the surface area of the aabb.
|
||||
*/
|
||||
[[nodiscard]] float SurfaceArea () const noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Static Member Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Combines two aabbs to form a larger aabb.
|
||||
* If one aabb is completely contained by the other, the result is the larger aabb.
|
||||
* @return
|
||||
* The combined aabb.
|
||||
*/
|
||||
[[nodiscard]] static SHAABB Combine (const SHAABB& lhs, const SHAABB& rhs) noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Checks if two aabbs are intersecting.
|
||||
* @return
|
||||
* True if they are intersecting.
|
||||
*/
|
||||
[[nodiscard]] static bool Intersect (const SHAABB& lhs, const SHAABB& rhs) noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Builds a single aabb from multiple aabbs.
|
||||
* @param spheres
|
||||
* The set of aabbs to build from.
|
||||
* @param numSpheres
|
||||
* The number of aabbs in the set to build from.
|
||||
* @return
|
||||
* An aabb that contains all the spheres in the set.
|
||||
*/
|
||||
[[nodiscard]] static SHAABB BuildFromBoxes (const SHAABB* boxes, size_t numBoxes) noexcept;
|
||||
|
||||
/**
|
||||
* @brief
|
||||
* Builds a aabb from a set of vertices.
|
||||
* @param vertices
|
||||
* The vertices to build a aabb from.
|
||||
* @param numVertices
|
||||
* The number of vertices in the set to build from.
|
||||
* @param stride
|
||||
* The stride between each vertex, in the instance there is data in between each
|
||||
* vertex that does not define the geometry of the object.
|
||||
* @return
|
||||
* An aabb that contains all the vertices in the set.
|
||||
*/
|
||||
[[nodiscard]] static SHAABB BuildFromVertices (const SHVec3* vertices, size_t numVertices, size_t stride = 0) noexcept;
|
||||
};
|
||||
|
||||
|
||||
} // namespace SHADE
|
||||
Loading…
Reference in New Issue