SSAO does not work with orthographic projections

[aevyrie]

Bevy version

0.13

What you did

Use an orthographic camera.

What went wrong

SSAO stopped working properly.

Additional information

This is visible in the bevy_editor_cam cad example. Switch between projections to see it.

Screen.Recording.2024-06-13.at.6.44.41.PM.mp4

[JMS55]

It's due to this

bevy/crates/bevy_pbr/src/ssao/gtao.wgsl

Lines 76 to 81 in 2cffd14

	fn reconstruct_view_space_position(depth: f32, uv: vec2<f32>) -> vec3<f32> {
	let clip_xy = vec2<f32>(uv.x * 2.0 - 1.0, 1.0 - 2.0 * uv.y);
	let t = view.view_from_clip * vec4<f32>(clip_xy, depth, 1.0);
	let view_xyz = t.xyz / t.w;
	return view_xyz;
	}

.

We should probably switch this to use the view transformation code.