graphics: make curve more smooth

1 files changed, 21 insertions, 11 deletions

diff --git a/src/screen/main.zig b/src/screen/main.zig
index 0ee7e17..2387f57 100644
--- a/src/screen/main.zig
+++ b/src/screen/main.zig
@@ -33,30 +33,40 @@ pub fn main() !void {
 
 	var curve = graphics.Curve {
 		.start = .{ .x = center_x, .y = center_y },
-		.middle = .{ .x = center_x, .y = center_y + 150 },
-		.end = .{ .x = center_x + 110 , .y = center_y + 100  },
+		.middle = .{ .x = center_x + 200, .y = center_y - 150 },
+		.end = .{ .x = center_x + 100 , .y = center_y + 100  },
 		.color = .{ .red = 0xff, .green = 0, .blue = 0 },
 	};
 
 	var last_duration: f64 = 0;
 	var delta: f64 = 0;
+	var angle: f64 = 0;
 
 	while (true) {
 		const start = try std.time.Instant.now();
 		const canvas = buffer.canvas();
 
-		canvas.fill(.{ .red = 0x5, .green = 0x5, .blue = 0x5 });
+		canvas.fill(.{ .red = 0x25, .green = 0x25, .blue = 0x25 });
 
-		//(graphics.Box {
-		//	.x = center_x - 100,
-		//	.y = center_y - 100,
-		//	.width = 200,
-		//	.height = 200,
-		//	.radius = 100,
-		//	.color = .{ .red = 0xff, .green = 0xff, .blue = 0xff },
-		//}).render(&canvas);
+		(graphics.Box {
+			.x = center_x - 100,
+			.y = center_y - 100,
+			.width = 200,
+			.height = 200,
+			.radius = 100,
+			.color = .{ .red = 0xff, .green = 0xff, .blue = 0xff },
+		}).render(&canvas);
 
 		curve.render(&canvas);
+		const cos = @cos(std.math.degreesToRadians(angle));
+		const sin = @sin(std.math.degreesToRadians(angle));
+		curve.end.x = @intCast(@as(i64, @intCast(center_x)) + @as(i64, @intFromFloat(100 * cos)));
+		curve.end.y = @intCast(@as(i64, @intCast(center_y)) + @as(i64, @intFromFloat(100 * sin)));
+
+		angle += delta;
+		if (angle > 360) {
+			angle = 0;
+		}
 
 		const end = try std.time.Instant.now();
 		const duration: f64 = @floatFromInt(end.since(start));