fast image operations
| -rw-r--r-- | src/drawing/tri.rs | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/drawing/tri.rs b/src/drawing/tri.rs index c7256c5..7aa3493 100644 --- a/src/drawing/tri.rs +++ b/src/drawing/tri.rs @@ -21,14 +21,14 @@ impl<const CHANNELS: usize> Image<&mut [u8], CHANNELS> { // TODO optimize for y in y1.min(y2).min(y3) as u32..y1.max(y2).max(y3) as u32 { for x in x1.min(x2).min(x3) as u32..x1.max(x2).max(x3) as u32 { - let s = (x1 - x3) * (y as f32 - y3) - (y1 - y2) * (x as f32 - x3); - let t = (x2 - x1) * (y as f32 - y1) - (y2 - y1) * (x as f32 - x1); + let s = (x1 - x3).mul_add(y as f32 - y3, -(y1 - y2) * (x as f32 - x3)); + let t = (x2 - x1).mul_add(y as f32 - y1, -(y2 - y1) * (x as f32 - x1)); if (s < 0.0) != (t < 0.0) && s != 0.0 && t != 0.0 { continue; } - let d = (x3 - x2) * (y as f32 - y2) - (y3 - y2) * (x as f32 - x2); + let d = (x3 - x2).mul_add(y as f32 - y2, -(y3 - y2) * (x as f32 - x2)); if (d == 0.0 || (d < 0.0) == (s + t <= 0.0)) && x < self.width() && y < self.height() |