SkOpCubicHull.cpp File Reference

#include "src/pathops/SkPathOpsCubic.h"
#include "src/pathops/SkPathOpsPoint.h"
#include "src/pathops/SkPathOpsTypes.h"
#include <algorithm>
#include <cstddef>

Go to the source code of this file.

Functions
static bool	rotate (const SkDCubic &cubic, int zero, int index, SkDCubic &rotPath)
static int	side (double x)

Function Documentation

rotate()

static bool rotate ( const SkDCubic &  cubic, int  zero, int  index, SkDCubic &  rotPath  )

static

Definition at line 14 of file SkOpCubicHull.cpp.

                                                                                  {
    double dy = cubic[index].fY - cubic[zero].fY;
    double dx = cubic[index].fX - cubic[zero].fX;
    if (approximately_zero(dy)) {
        if (approximately_zero(dx)) {
            return false;
        }
        rotPath = cubic;
        if (dy) {
            rotPath[index].fY = cubic[zero].fY;
            int mask = other_two(index, zero);
            int side1 = index ^ mask;
            int side2 = zero ^ mask;
            if (approximately_equal(cubic[side1].fY, cubic[zero].fY)) {
                rotPath[side1].fY = cubic[zero].fY;
            }
            if (approximately_equal(cubic[side2].fY, cubic[zero].fY)) {
                rotPath[side2].fY = cubic[zero].fY;
            }
        }
        return true;
    }
    for (int i = 0; i < 4; ++i) {
        rotPath[i].fX = cubic[i].fX * dx + cubic[i].fY * dy;
        rotPath[i].fY = cubic[i].fY * dx - cubic[i].fX * dy;
    }
    return true;
}

side()

static int side ( double  x )

static

Definition at line 45 of file SkOpCubicHull.cpp.

                          {
    return (x > 0) + (x >= 0);
}