mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-25 09:08:22 -05:00
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/*
|
|
* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#ifndef BOUNDS_H_HEADER_GUARD
|
|
#define BOUNDS_H_HEADER_GUARD
|
|
|
|
struct Aabb
|
|
{
|
|
float m_min[3];
|
|
float m_max[3];
|
|
};
|
|
|
|
struct Cylinder
|
|
{
|
|
float m_pos[3];
|
|
float m_end[3];
|
|
float m_radius;
|
|
};
|
|
|
|
struct Disk
|
|
{
|
|
float m_center[3];
|
|
float m_normal[3];
|
|
float m_radius;
|
|
};
|
|
|
|
struct Obb
|
|
{
|
|
float m_mtx[16];
|
|
};
|
|
|
|
struct Plane
|
|
{
|
|
float m_normal[3];
|
|
float m_dist;
|
|
};
|
|
|
|
struct Ray
|
|
{
|
|
float m_pos[3];
|
|
float m_dir[3];
|
|
};
|
|
|
|
struct Sphere
|
|
{
|
|
float m_center[3];
|
|
float m_radius;
|
|
};
|
|
|
|
struct Tris
|
|
{
|
|
float m_v0[3];
|
|
float m_v1[3];
|
|
float m_v2[3];
|
|
};
|
|
|
|
struct Intersection
|
|
{
|
|
float m_pos[3];
|
|
float m_normal[3];
|
|
float m_dist;
|
|
};
|
|
|
|
/// Convert axis aligned bounding box to oriented bounding box.
|
|
void aabbToObb(Obb& _obb, const Aabb& _aabb);
|
|
|
|
/// Convert sphere to axis aligned bounding box.
|
|
void sphereToAabb(Aabb& _aabb, const Sphere& _sphere);
|
|
|
|
/// Calculate surface area of axis aligned bounding box.
|
|
float calcAabbArea(Aabb& _aabb);
|
|
|
|
/// Calculate axis aligned bounding box.
|
|
void calcAabb(Aabb& _aabb, const void* _vertices, uint32_t _numVertices, uint32_t _stride);
|
|
|
|
/// Transform vertices and calculate axis aligned bounding box.
|
|
void calcAabb(Aabb& _aabb, const float* _mtx, const void* _vertices, uint32_t _numVertices, uint32_t _stride);
|
|
|
|
/// Expand AABB.
|
|
void aabbExpand(Aabb& _aabb, float _factor);
|
|
|
|
/// Returns 0 is two AABB don't overlap, otherwise returns flags of overlap
|
|
/// test.
|
|
uint32_t aabbOverlapTest(const Aabb& _aabb0, const Aabb& _aabb1);
|
|
|
|
/// Calculate oriented bounding box.
|
|
void calcObb(Obb& _obb, const void* _vertices, uint32_t _numVertices, uint32_t _stride, uint32_t _steps = 17);
|
|
|
|
/// Calculate maximum bounding sphere.
|
|
void calcMaxBoundingSphere(Sphere& _sphere, const void* _vertices, uint32_t _numVertices, uint32_t _stride);
|
|
|
|
/// Calculate minimum bounding sphere.
|
|
void calcMinBoundingSphere(Sphere& _sphere, const void* _vertices, uint32_t _numVertices, uint32_t _stride, float _step = 0.01f);
|
|
|
|
/// Make screen space ray from x, y coordinate and inverse view-projection matrix.
|
|
Ray makeRay(float _x, float _y, const float* _invVp);
|
|
|
|
/// Intersect ray / aabb.
|
|
bool intersect(const Ray& _ray, const Aabb& _aabb, Intersection* _intersection = NULL);
|
|
|
|
/// Intersect ray / cylinder.
|
|
bool intersect(const Ray& _ray, const Cylinder& _cylinder, bool _capsule, Intersection* _intersection = NULL);
|
|
|
|
/// Intersect ray / disk.
|
|
bool intersect(const Ray& _ray, const Disk& _disk, Intersection* _intersection = NULL);
|
|
|
|
/// Intersect ray / plane.
|
|
bool intersect(const Ray& _ray, const Plane& _plane, Intersection* _intersection = NULL);
|
|
|
|
/// Intersect ray / sphere.
|
|
bool intersect(const Ray& _ray, const Sphere& _sphere, Intersection* _intersection = NULL);
|
|
|
|
/// Intersect ray / triangle.
|
|
bool intersect(const Ray& _ray, const Tris& _triangle, Intersection* _intersection = NULL);
|
|
|
|
#endif // BOUNDS_H_HEADER_GUARD
|