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Visibility range takes the model aabb into acount (#15164)

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# Objective

I'm building a game where i generate a set of meshes where the transform
is identity, and in each mesh the vertices are offset to where the model
is. When adding visibility ranges to the models i noticed that they only
switched when the distance to the origin changed over the threshold and
all at the same time.

## Solution

I believe that each mesh gets a Aabb generated for use with visibility
testing. So we can use that aabb to calculate a more representative
distance to the mesh.

The code to transform the aabb is taken from the visibility sysyem.

## Testing
I tested the changes locally in my project.

Would you like me to write an example or a test somewhere?
Is there any other code that uses the visibility range, that i should
also update?
This commit is contained in:
Jonathan Nilsson 2024-09-23 22:38:26 +02:00 committed by GitHub
parent 740d1cc9ff
commit 0ebd7fcdf4
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1 changed files with 11 additions and 5 deletions
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16
crates/bevy_render/src/view/visibility/range.rs
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@ -24,6 +24,7 @@ use wgpu::{BufferBindingType, BufferUsages};
use crate::{
camera::Camera,
primitives::Aabb,
render_resource::BufferVec,
renderer::{RenderDevice, RenderQueue},
Extract, ExtractSchedule, Render, RenderApp, RenderSet,
@ -366,7 +367,7 @@ impl VisibleEntityRanges {
pub fn check_visibility_ranges(
mut visible_entity_ranges: ResMut<VisibleEntityRanges>,
view_query: Query<(Entity, &GlobalTransform), With<Camera>>,
mut entity_query: Query<(Entity, &GlobalTransform, &VisibilityRange)>,
mut entity_query: Query<(Entity, &GlobalTransform, Option<&Aabb>, &VisibilityRange)>,
) {
visible_entity_ranges.clear();
@ -385,12 +386,17 @@ pub fn check_visibility_ranges(
// Check each entity/view pair. Only consider entities with
// [`VisibilityRange`] components.
for (entity, entity_transform, visibility_range) in entity_query.iter_mut() {
for (entity, entity_transform, maybe_model_aabb, visibility_range) in entity_query.iter_mut() {
let mut visibility = 0;
for (view_index, &(_, view_position)) in views.iter().enumerate() {
if visibility_range
.is_visible_at_all((view_position - entity_transform.translation_vec3a()).length())
{
let model_pos = if let Some(model_aabb) = maybe_model_aabb {
let world_from_local = entity_transform.affine();
world_from_local.transform_point3a(model_aabb.center)
} else {
entity_transform.translation_vec3a()
};
if visibility_range.is_visible_at_all((view_position - model_pos).length()) {
visibility |= 1 << view_index;
}
}