fixed 2 more dot collision bugs (last ones?)

[vor.git] / shape.c

diff --git a/shape.c b/shape.c
index 5aa7fb7..92729e9 100644 (file)
--- a/shape.c
+++ b/shape.c
@@ -116,6 +116,6 @@ pixel_collide(unsigned int xoff, unsigned int yoff, struct shape *r)
        
        if(xoff >= r->w || yoff >= r->h) return 0;
 
-       pmask = 1 << (xoff & 31); xoff >>= 5;
-       return r->mask[yoff*r->mw + xoff] & pmask;
+       pmask = 1 << (32 - (xoff&0x1f));
+       return r->mask[(yoff*r->mw) + (xoff>>5)] & pmask;
 }