GrTriangulator::Line Struct Reference

#include <GrTriangulator.h>

Public Member Functions
	Line (double a, double b, double c)
	Line (Vertex *p, Vertex *q)
	Line (const SkPoint &p, const SkPoint &q)
double	dist (const SkPoint &p) const
Line	operator* (double v) const
double	magSq () const
void	normalize ()
bool	nearParallel (const Line &o) const
bool	intersect (const Line &other, SkPoint *point) const

Public Attributes
double	fA
double	fB
double	fC

Detailed Description

Definition at line 358 of file GrTriangulator.h.

Constructor & Destructor Documentation

Line() [1/3]

GrTriangulator::Line::Line ( double  a, double  b, double  c  )

inline

Definition at line 359 of file GrTriangulator.h.

: fA(a), fB(b), fC(c) {}

Line() [2/3]

GrTriangulator::Line::Line ( Vertex *  p, Vertex *  q  )

inline

Definition at line 360 of file GrTriangulator.h.

: Line(p->fPoint, q->fPoint) {}

Line() [3/3]

GrTriangulator::Line::Line ( const SkPoint &  p, const SkPoint &  q  )

inline

Definition at line 361 of file GrTriangulator.h.

        : fA(static_cast<double>(q.fY) - p.fY)      // a = dY
        , fB(static_cast<double>(p.fX) - q.fX)      // b = -dX
        , fC(static_cast<double>(p.fY) * q.fX -     // c = cross(q, p)
             static_cast<double>(p.fX) * q.fY) {}

Member Function Documentation

dist()

double GrTriangulator::Line::dist ( const SkPoint &  p ) const

inline

Definition at line 366 of file GrTriangulator.h.

{ return fA * p.fX + fB * p.fY + fC; }

intersect()

bool GrTriangulator::Line::intersect	(	const Line &	other,
		SkPoint *	point
	)		const

Definition at line 155 of file GrTriangulator.cpp.

                                                                          {
    double denom = fA * other.fB - fB * other.fA;
    if (denom == 0.0) {
        return false;
    }
    double scale = 1.0 / denom;
    point->fX = double_to_clamped_scalar((fB * other.fC - other.fB * fC) * scale);
    point->fY = double_to_clamped_scalar((other.fA * fC - fA * other.fC) * scale);
     round(point);
    return point->isFinite();
}

magSq()

double GrTriangulator::Line::magSq ( ) const

inline

Definition at line 368 of file GrTriangulator.h.

{ return fA * fA + fB * fB; }

nearParallel()

bool GrTriangulator::Line::nearParallel ( const Line &  o ) const

inline

Definition at line 379 of file GrTriangulator.h.

                                           {
        return fabs(o.fA - fA) < 0.00001 && fabs(o.fB - fB) < 0.00001;
    }

normalize()

void GrTriangulator::Line::normalize ( )

inline

Definition at line 369 of file GrTriangulator.h.

                     {
        double len = sqrt(this->magSq());
        if (len == 0.0) {
            return;
        }
        double scale = 1.0f / len;
        fA *= scale;
        fB *= scale;
        fC *= scale;
    }

operator*()

Line GrTriangulator::Line::operator* ( double  v ) const

inline

Definition at line 367 of file GrTriangulator.h.

{ return Line(fA * v, fB * v, fC * v); }

Member Data Documentation

fA

double GrTriangulator::Line::fA

Definition at line 385 of file GrTriangulator.h.

fB

double GrTriangulator::Line::fB

Definition at line 385 of file GrTriangulator.h.

fC

double GrTriangulator::Line::fC

Definition at line 385 of file GrTriangulator.h.

---

The documentation for this struct was generated from the following files:

• third_party/skia/src/gpu/ganesh/geometry/GrTriangulator.h
• third_party/skia/src/gpu/ganesh/geometry/GrTriangulator.cpp