diff options
| author |  caryclark@google.com <caryclark@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-09-14 14:19:30 +0000 |
|---|---|---|
| committer | caryclark@google.com <caryclark@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-09-14 14:19:30 +0000 |
| commit | 235f56a92f6eb6accbb243e11b3c45e3798f38f2 (patch) | |
| tree | 2dc85f3ef6164f2f5e4285828d5777c2dbcd77b6 /experimental/Intersection/CubeRoot.cpp | |
| parent | ffadfb5d43a2b09394b4650829bcfc7329ed2d30 (diff) | |
shape ops work in progress
add quartic solution for intersecting quadratics
git-svn-id: http://skia.googlecode.com/svn/trunk@5541 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'experimental/Intersection/CubeRoot.cpp')
| -rw-r--r-- | experimental/Intersection/CubeRoot.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/experimental/Intersection/CubeRoot.cpp b/experimental/Intersection/CubeRoot.cpp index 7610e822bd..82d2732f6d 100644 --- a/experimental/Intersection/CubeRoot.cpp +++ b/experimental/Intersection/CubeRoot.cpp @@ -374,7 +374,14 @@ static int _tmain() #endif double cube_root(double x) { - return halley_cbrt3d(x); + if (approximately_zero(x)) { + return 0; + } + double result = halley_cbrt3d(fabs(x)); + if (x < 0) { + result = -result; + } + return result; } #if TEST_ALTERNATIVES |