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author | Tavian Barnes <tavianator@gmail.com> | 2010-04-15 23:31:11 -0400 |
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committer | Tavian Barnes <tavianator@gmail.com> | 2010-04-15 23:31:11 -0400 |
commit | cdaacf47797665a1558006a0fd0d801f65c30c92 (patch) | |
tree | 55b779fde719827f77aa6032022621b0ed009394 | |
parent | cb85f91c28be53b4436d4cb4ff3ce4c87f501ba3 (diff) | |
download | dimension-cdaacf47797665a1558006a0fd0d801f65c30c92.tar.xz |
Fix canvas_pigments with negative coordinates.
-rw-r--r-- | libdimension/canvas_pigment.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/libdimension/canvas_pigment.c b/libdimension/canvas_pigment.c index ad68fe1..8667e4d 100644 --- a/libdimension/canvas_pigment.c +++ b/libdimension/canvas_pigment.c @@ -44,13 +44,10 @@ dmnsn_canvas_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v) dmnsn_canvas *canvas = pigment->ptr; - int x = v.x*(canvas->x - 1) + 0.5; - int y = v.x*(canvas->x - 1) + 0.5; - if (x >= 0 && y >= 0 && x < canvas->x && y < canvas->y) { - return dmnsn_get_pixel(canvas, x, y); - } else { - return dmnsn_black; - } + int x = (fmod(v.x, 1.0) + 1.0)*(canvas->x - 1) + 0.5; + int y = (fmod(v.y, 1.0) + 1.0)*(canvas->y - 1) + 0.5; + dmnsn_color c = dmnsn_get_pixel(canvas, x%canvas->x, y%canvas->y); + return c; } static void |