get smooth brush strokes working to my present satisfaction

1 files changed, 14 insertions, 3 deletions

diff --git a/drawing/drawing.ha b/drawing/drawing.ha
index a7d9e1f..54116a3 100644
--- a/drawing/drawing.ha
+++ b/drawing/drawing.ha
@@ -103,9 +103,19 @@ export fn circle_hollow(picture: *picture, c: pos, r: i32, color: u32) void = {
 export fn stroke(picture: *picture, c0: pos, c1: pos, r: i32, color: u32) void = {
 	const dx = c1.0 - c0.0;
 	const dy = c1.1 - c0.1;
-	const count = (abs(dx)+abs(dy))/r;
-	const sx = dx: f64 / (count-1): f64;
-	const sy = dy: f64 / (count-1): f64;
+	const d = math::sqrtf64((dx*dx+dy*dy):f64):i32;
+	const count = d/r  + 1;
+	if (count == 0) {
+		circle(picture, c1, r, color);
+		return;
+	} else if (count == 1) {
+		circle(picture, c0, r, color);
+		circle(picture, c1, r, color);
+		return;
+	};
+	fmt::printfln("count: {}",count)!;
+	const sx = dx: f64 / (count): f64;
+	const sy = dy: f64 / (count): f64;
 
 	for (let i = 0i32; i < count; i += 1) {
 		const cx = c0.0 + math::roundf64(i:f64*sx):i32;
@@ -113,6 +123,7 @@ export fn stroke(picture: *picture, c0: pos, c1: pos, r: i32, color: u32) void =
 
 		circle(picture, (cx, cy), r, color);
 	};
+	circle(picture, c1, r, color);
 };
 
 // ehh should check bounding box instead of doing all pictures maybe