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[vor.git]
/
shape.c
diff --git
a/shape.c
b/shape.c
index
5aa7fb7
..
75424ef
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 = 0x80000000 >> (xoff&0x1f);
+ return r->mask[(yoff*r->mw) + (xoff>>5)] & pmask;
}