diff options
Diffstat (limited to 'src/pathops')
| -rw-r--r-- | src/pathops/SkPathOpsQuad.cpp | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/pathops/SkPathOpsQuad.cpp b/src/pathops/SkPathOpsQuad.cpp index ab1ba05c56..f410ea3737 100644 --- a/src/pathops/SkPathOpsQuad.cpp +++ b/src/pathops/SkPathOpsQuad.cpp @@ -21,11 +21,14 @@ static bool pointInTriangle(const SkDPoint fPts[3], const SkDPoint& test) { double dot11 = v1.dot(v1); double dot12 = v1.dot(v2); // Compute barycentric coordinates - double invDenom = 1 / (dot00 * dot11 - dot01 * dot01); - double u = (dot11 * dot02 - dot01 * dot12) * invDenom; - double v = (dot00 * dot12 - dot01 * dot02) * invDenom; + double denom = dot00 * dot11 - dot01 * dot01; + double u = dot11 * dot02 - dot01 * dot12; + double v = dot00 * dot12 - dot01 * dot02; // Check if point is in triangle - return u >= 0 && v >= 0 && u + v < 1; + if (denom >= 0) { + return u >= 0 && v >= 0 && u + v < denom; + } + return u <= 0 && v <= 0 && u + v > denom; } static bool matchesEnd(const SkDPoint fPts[3], const SkDPoint& test) { |