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Spotlight shadow bugfix (#5451)

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# Objective

fix an error in shadow map indexing that occurs when point lights without shadows are used in conjunction with spotlights with shadows

## Solution

calculate point_light_count correctly
This commit is contained in:
robtfm 2022-07-25 16:24:54 +00:00
parent d4787111a3
commit 6a1ba9c456
1 changed files with 8 additions and 4 deletions
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12
crates/bevy_pbr/src/render/light.rs
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@ -797,10 +797,14 @@ pub fn prepare_lights(
let point_light_count = point_lights
.iter()
.filter(|light| light.1.shadows_enabled && light.1.spot_light_angles.is_none())
.filter(|light| light.1.spot_light_angles.is_none())
.count();
let point_light_shadow_maps_count = point_light_count.min(max_texture_cubes);
let point_light_shadow_maps_count = point_lights
.iter()
.filter(|light| light.1.shadows_enabled && light.1.spot_light_angles.is_none())
.count()
.min(max_texture_cubes);
let directional_shadow_maps_count = directional_lights
.iter()
@ -970,7 +974,7 @@ pub fn prepare_lights(
n_directional_lights: directional_lights.iter().len() as u32,
// spotlight shadow maps are stored in the directional light array, starting at directional_shadow_maps_count.
// the spot lights themselves start in the light array at point_light_count. so to go from light
// index to shadow map index, we need to subtract point light shadowmap count and add directional shadowmap count.
// index to shadow map index, we need to subtract point light count and add directional shadowmap count.
spot_light_shadowmap_offset: directional_shadow_maps_count as i32
- point_light_count as i32,
};
@ -1045,7 +1049,7 @@ pub fn prepare_lights(
let spot_view_transform = spot_view_matrix.into();
let angle = light.spot_light_angles.expect("lights should be sorted so that \
[point_light_shadow_maps_count..point_light_shadow_maps_count + spot_light_shadow_maps_count] are spot lights").1;
[point_light_count..point_light_count + spot_light_shadow_maps_count] are spot lights").1;
let spot_projection = spot_light_projection_matrix(angle);
let depth_texture_view =