This commit is contained in:
Бранимир Караџић
2021-10-28 18:41:33 -07:00
parent 51c3264846
commit 5e8c84618f
3 changed files with 138 additions and 76 deletions

View File

@@ -10,6 +10,20 @@
namespace bx
{
///
struct Line
{
Vec3 pos = init::None;
Vec3 dir = init::None;
};
///
struct LineSegment
{
Vec3 pos = init::None;
Vec3 end = init::None;
};
///
struct Aabb
{
@@ -20,33 +34,33 @@ namespace bx
///
struct Capsule
{
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
};
///
struct Cone
{
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
};
///
struct Cylinder
{
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
Vec3 pos = init::None;
Vec3 end = init::None;
float radius;
};
///
struct Disk
{
Vec3 center = init::None;
Vec3 normal = init::None;
float radius;
Vec3 center = init::None;
Vec3 normal = init::None;
float radius;
};
///
@@ -58,8 +72,8 @@ namespace bx
///
struct Sphere
{
Vec3 center = init::None;
float radius;
Vec3 center = init::None;
float radius;
};
///
@@ -84,9 +98,37 @@ namespace bx
Plane plane = init::None;
};
///
struct Interval
{
///
Interval(float _val);
///
Interval(float _min, float _max);
///
void set(float _val);
///
void setCenter(float _val);
///
void expand(float _val);
float min;
float max;
};
///
Vec3 getPointAt(const Ray& _ray, float _t);
///
Vec3 getPointAt(const Line& _line, float _t);
///
Vec3 getPointAt(const LineSegment& _line, float _t);
///
Vec3 getCenter(const Aabb& _aabb);
@@ -183,6 +225,30 @@ namespace bx
/// Intersect ray / triangle.
bool intersect(const Ray& _ray, const Triangle& _triangle, Hit* _hit = NULL);
///
Vec3 closestPoint(const Line& _line, const Vec3& _point);
///
Vec3 closestPoint(const LineSegment& _line, const Vec3& _point);
///
Vec3 closestPoint(const Plane& _plane, const Vec3& _point);
///
Vec3 closestPoint(const Aabb& _aabb, const Vec3& _point);
///
Vec3 closestPoint(const Obb& _obb, const Vec3& _point);
///
Vec3 closestPoint(const Triangle& _triangle, const Vec3& _point);
///
bool overlap(const Interval& _interval, float _pos);
///
bool overlap(const Interval& _intervalA, const Interval& _intervalB);
///
bool overlap(const Aabb& _aabb, const Vec3& _pos);

View File

@@ -9,16 +9,71 @@
namespace bx
{
inline Interval::Interval(float _val)
: min(_val)
, max(_val)
{
}
inline Interval::Interval(float _min, float _max)
: min(_min)
, max(_max)
{
}
inline void Interval::set(float _val)
{
min = _val;
max = _val;
}
inline void Interval::setCenter(float _val)
{
const float extents = (max - min) * 0.5f;
min = _val - extents;
max = _val + extents;
}
inline void Interval::expand(float _val)
{
min = bx::min(min, _val);
max = bx::max(max, _val);
}
inline Vec3 getPointAt(const Ray& _ray, float _t)
{
return mad(_ray.dir, _t, _ray.pos);
}
inline Vec3 getPointAt(const Line& _line, float _t)
{
return mad(_line.dir, _t, _line.pos);
}
inline Vec3 getPointAt(const LineSegment& _line, float _t)
{
return lerp(_line.pos, _line.end, _t);
}
inline bool intersect(const Ray& _ray, const Plane& _plane, Hit* _hit)
{
return intersect(_ray, _plane, false, _hit);
}
inline bool overlap(const Interval& _interval, float _t)
{
return _t > _interval.min
&& _t < _interval.max
;
}
inline bool overlap(const Interval& _intervalA, const Interval& _intervalB)
{
return _intervalA.max > _intervalB.min
&& _intervalB.max > _intervalA.min
;
}
inline bool overlap(const Aabb& _aabb, const Sphere& _sphere)
{
return overlap(_sphere, _aabb);

View File

@@ -856,43 +856,6 @@ namespace bx
calcPlane(_outPlane, _triangle.v0, _triangle.v1, _triangle.v2);
}
struct Interval
{
Interval(float _val)
: start(_val)
, end(_val)
{
}
Interval(float _start, float _end)
: start(_start)
, end(_end)
{
}
void set(float _val)
{
start = _val;
end = _val;
}
void expand(float _val)
{
start = min(_val, start);
end = max(_val, end);
}
float start;
float end;
};
bool overlap(const Interval& _a, const Interval& _b)
{
return _a.end > _b.start
&& _b.end > _a.start
;
}
float projectToAxis(const Vec3& _axis, const Vec3& _point)
{
return dot(_axis, _point);
@@ -913,7 +876,7 @@ namespace bx
Interval projectToAxis(const Vec3& _axis, const Aabb& _aabb)
{
const float extent = abs(projectToAxis(abs(_axis), getExtents(_aabb) ) );
const float center = projectToAxis( _axis , getCenter (_aabb) );
const float center = projectToAxis( _axis , getCenter (_aabb) );
return
{
center - extent,
@@ -1057,17 +1020,6 @@ namespace bx
return isNearZero(dot(_v, _v) );
}
struct Line
{
Vec3 pos = init::None;
Vec3 dir = init::None;
};
inline Vec3 getPointAt(const Line& _line, float _t)
{
return mad(_line.dir, _t, _line.pos);
}
bool intersect(Line& _outLine, const Plane& _planeA, const Plane& _planeB)
{
const Vec3 axb = cross(_planeA.normal, _planeB.normal);
@@ -1107,17 +1059,6 @@ namespace bx
return result;
}
struct LineSegment
{
Vec3 pos;
Vec3 end;
};
inline Vec3 getPointAt(const LineSegment& _line, float _t)
{
return lerp(_line.pos, _line.end, _t);
}
bool intersect(float& _outTa, float& _outTb, const LineSegment& _a, const LineSegment& _b)
{
// Reference(s):
@@ -1380,7 +1321,7 @@ namespace bx
}
static void calcObbVertices(
Vec3* _outVertices
Vec3* _outVertices
, const Vec3& _axisX
, const Vec3& _axisY
, const Vec3& _axisZ
@@ -1485,7 +1426,7 @@ namespace bx
const Vec3 bd = sub(_capsuleB.end, _capsuleB.pos);
return overlap(
Sphere{mad(ad, ta, _capsuleA.pos), _capsuleA.radius}
Sphere{mad(ad, ta, _capsuleA.pos), _capsuleA.radius}
, Sphere{mad(bd, tb, _capsuleB.pos), _capsuleB.radius}
);
}