51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
// $Id: ScallopedSector.h,v 1.3 2006/07/06 23:30:24 zr Exp $
|
|
|
|
#include <vector>
|
|
|
|
typedef struct {
|
|
Vec2 P;
|
|
float r, sign, d, theta, integralAtStart;
|
|
float rSqrd, dSqrd;
|
|
} ArcData;
|
|
|
|
class ScallopedSector
|
|
{
|
|
public:
|
|
Vec2 P;
|
|
float a1, a2, area;
|
|
|
|
ArcData arcs[2];
|
|
|
|
public:
|
|
ScallopedSector(Vec2 &_Pt, float _a1, float _a2, Vec2 &P1, float r1, float sign1, Vec2 &P2, float r2, float sign2);
|
|
|
|
float calcAreaToAngle(float angle);
|
|
float calcAngleForArea(float area, RNG &rng);
|
|
Vec2 sample(RNG &rng);
|
|
|
|
float distToCurve(float angle, int index);
|
|
|
|
void subtractDisk(Vec2 &C, float r, std::vector<ScallopedSector> *regions);
|
|
|
|
private:
|
|
float canonizeAngle(float angle);
|
|
|
|
void distToCircle(float angle, Vec2 &C, float r, float *d1_out, float *d2_out);
|
|
};
|
|
|
|
class ScallopedRegion
|
|
{
|
|
public:
|
|
std::vector<ScallopedSector> *regions;
|
|
float minArea;
|
|
float area;
|
|
|
|
public:
|
|
ScallopedRegion(Vec2 &P, float r1, float r2, float minArea=.00000001);
|
|
~ScallopedRegion();
|
|
|
|
bool isEmpty() { return regions->size()==0; }
|
|
void subtractDisk(Vec2 C, float r);
|
|
|
|
Vec2 sample(RNG &rng);
|
|
};
|