Fix unsetting RenderLayers bit in without fn (#2409)

# Objective

Fixes how the layer bit is unset in the RenderLayers bit mask when calling the `without` method.

## Solution

Unsets the layer bit using `&=` and the inverse of the layer bit mask.
This commit is contained in:
andoco 2021-07-01 20:41:40 +00:00
parent b911a005d9
commit 941a8fb8a3

View file

@ -110,7 +110,7 @@ impl RenderLayers {
/// Panics when called with a layer greater than `TOTAL_LAYERS - 1`.
pub fn without(mut self, layer: Layer) -> Self {
assert!(usize::from(layer) < Self::TOTAL_LAYERS);
self.0 |= 0 << layer;
self.0 &= !(1 << layer);
self
}
@ -146,6 +146,11 @@ mod rendering_mask_tests {
assert_eq!(RenderLayers::layer(0).0, 1, "layer 0 is mask 1");
assert_eq!(RenderLayers::layer(1).0, 2, "layer 1 is mask 2");
assert_eq!(RenderLayers::layer(0).with(1).0, 3, "layer 0 + 1 is mask 3");
assert_eq!(
RenderLayers::layer(0).with(1).without(0).0,
2,
"layer 0 + 1 - 0 is mask 2"
);
assert!(
RenderLayers::layer(1).intersects(&RenderLayers::layer(1)),
"layers match like layers"