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Add comments about transmissive steps

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This commit is contained in:
Marco Buono 2023-06-06 02:56:45 -03:00
parent d95d58052b
commit f798c16388
1 changed files with 6 additions and 0 deletions
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6
crates/bevy_core_pipeline/src/core_3d/main_transmissive_pass_3d_node.rs
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@ -70,7 +70,12 @@ impl ViewNode for MainTransmissivePass3dNode {
if transmissive_steps > 0 {
let transmission =
transmission.expect("`ViewTransmissionTexture` should exist at this point");
// `transmissive_phase.items` are depth sorted, so we split them into N = `transmissive_steps` ranges,
// rendering them back-to-front in multiple steps, allowing multiple levels of transparency.
for range in split_range(0..transmissive_phase.items.len(), transmissive_steps) {
// Copy the main texture to the transmission texture, allowing to use the color output of the
// previous step (or of the `Opaque3d` phase, for the first step) as a transmissive color input
render_context.command_encoder().copy_texture_to_texture(
target.main_texture().as_image_copy(),
transmission.texture.as_image_copy(),
@ -88,6 +93,7 @@ impl ViewNode for MainTransmissivePass3dNode {
render_pass.set_camera_viewport(viewport);
}
// render items in range
transmissive_phase.render_range(&mut render_pass, world, view_entity, range);
}
} else {