diff options
| author | Erik Reckase <e.reckase@gmail.com> | 2011-01-12 20:52:59 +0000 |
|---|---|---|
| committer | Scott Draves <spot@draves.org> | 2015-02-15 12:20:15 -0500 |
| commit | 5ac641382d38e2bfb6b825aa0f56b9be7c5fedc2 (patch) | |
| tree | 28e3d5e9678f47251dbaec149a8bb2428954072a | |
| parent | ce2bbf871f3ebaea965bb3567105527dbdf640ea (diff) | |
| download | pucket-5ac641382d38e2bfb6b825aa0f56b9be7c5fedc2.tar.gz pucket-5ac641382d38e2bfb6b825aa0f56b9be7c5fedc2.tar.bz2 pucket-5ac641382d38e2bfb6b825aa0f56b9be7c5fedc2.zip | |
roundoff error was introducing some strangeness in smoothly interpolated genome palettes - now ensure that all 1.0 alpha channels -> 1.0 alpha in output
git-svn-id: https://flam3.googlecode.com/svn/trunk@156 77852712-ef1d-11de-8684-7d64432d61a3
| -rw-r--r-- | src/interpolation.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/interpolation.c b/src/interpolation.c index c4e680b..b23e687 100644 --- a/src/interpolation.c +++ b/src/interpolation.c @@ -367,6 +367,8 @@ void flam3_interpolate_n(flam3_genome *result, int ncp, for (i = 0; i < 256; i++) { double t[3], s[4]; + int alpha1 = 1; + s[0] = s[1] = s[2] = s[3] = s[4] = 0.0; for (k = 0; k < ncp; k++) { @@ -375,9 +377,14 @@ void flam3_interpolate_n(flam3_genome *result, int ncp, s[j] += c[k] * t[j]; s[3] += c[k] * cpi[k].palette[i].color[3]; + if (cpi[k].palette[i].color[3] != 1.0) + alpha1 = 0; s[4] += c[k] * cpi[k].palette[i].index; } + + if (alpha1 == 1) + s[3] = 1.0; hsv2rgb(s, result->palette[i].color); result->palette[i].color[3] = s[3]; |