diff options
Diffstat (limited to 'src/blind-stack.c')
| -rw-r--r-- | src/blind-stack.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/blind-stack.c b/src/blind-stack.c index bff2923..c317bf5 100644 --- a/src/blind-stack.c +++ b/src/blind-stack.c @@ -20,10 +20,11 @@ USAGE("[-bs] bottom-stream ... top-stream") a2 = ((TYPE *)(streams[j].buf + i))[3];\ if (BLEND)\ a2 /= (TYPE)(j + 1);\ - x1 = x1 * a1 * (1 - a2) + x2 * a2;\ - y1 = y1 * a1 * (1 - a2) + y2 * a2;\ - z1 = z1 * a1 * (1 - a2) + z2 * a2;\ - a1 = a1 * (1 - a2) + a2;\ + a1 *= 1 - a2;\ + x1 = x1 * a1 + x2 * a2;\ + y1 = y1 * a1 + y2 * a2;\ + z1 = z1 * a1 + z2 * a2;\ + a1 += a2;\ }\ ((TYPE *)(streams[0].buf + i))[0] = x1;\ ((TYPE *)(streams[0].buf + i))[1] = y1;\ |