Rotate instances in the clockwise direction

1 files changed, 2 insertions, 1 deletions

diff --git a/shaders/sprite.wgsl b/shaders/sprite.wgsl
index 5a00e24..43f494e 100644
--- a/shaders/sprite.wgsl
+++ b/shaders/sprite.wgsl
@@ -27,7 +27,8 @@ fn vs_main(model: VertexInput, instance: InstanceInput) -> VertexOutput {
 	var out: VertexOutput;
 
 	// rotate the sprite
-	let a = vec2<f32>(cos(instance.rotation), sin(instance.rotation));
+	let rotation = -instance.rotation;
+	let a = vec2<f32>(cos(rotation), sin(rotation));
 	let b = vec2<f32>(-a[1], a[0]);
 	let rotation = mat2x2<f32>(a, b);
 	let rotated = rotation * model.position;