Add a function for computing a world point from a screen point

Cargo.toml

@@ -125,11 +125,19 @@ path = "examples/2d/text2d.rs"
 name = "texture_atlas"
 path = "examples/2d/texture_atlas.rs"
 
+[[example]]
+name = "mouse_tracking"
+path = "examples/2d/mouse_tracking.rs"
+
 # 3D Rendering
 [[example]]
 name = "3d_scene"
 path = "examples/3d/3d_scene.rs"
 
+[[example]]
+name = "screen_to_world"
+path = "examples/3d/screen_to_world.rs"
+
 [[example]]
 name = "load_gltf"
 path = "examples/3d/load_gltf.rs"

crates/bevy_ecs/src/system/system_param.rs

@@ -381,7 +381,7 @@ impl<'w, T: Component> AsRef<T> for ResMut<'w, T> {
 
 impl<'w, T: Component> AsMut<T> for ResMut<'w, T> {
     fn as_mut(&mut self) -> &mut T {
-        self.deref_mut()
+        &mut *self
     }
 }
 

crates/bevy_ecs/src/world/pointer.rs

@@ -47,7 +47,7 @@ impl<'w, T> AsRef<T> for Mut<'w, T> {
 
 impl<'w, T> AsMut<T> for Mut<'w, T> {
     fn as_mut(&mut self) -> &mut T {
-        self.deref_mut()
+        &mut *self
     }
 }
 

crates/bevy_geometry/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "bevy_geometry"
+version = "0.5.0"
+authors = [
+    "Bevy Contributors <bevyengine@gmail.com>",
+    "Aevyrie Roessler <aevyrie@gmail.com>",
+]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bevy_transform = { path = "../bevy_transform", version = "0.5.0" }
+bevy_math = { path = "../bevy_math", version = "0.5.0" }
+bevy_reflect = { path = "../bevy_reflect", version = "0.5.0", features = ["bevy"] }