Fixing selecting multiple pieces woot woot!

assets/martian.tweak.toml

@@ -43,7 +43,7 @@ Neothic Font by Daymarius: https://www.dafont.com/neothic.font
 # Colors are in hex (RED GREEN BLUE ALPHA)
 rgba_hidden = "#00000000"
 rgba_visible = "#FFFFFFFF"
-rgba_background = "#000000FF"
+rgba_background = "#000000AA"
 # Higher rate is slower typing speed. Integers only!
 delay = 0.1
 text = [
@@ -69,7 +69,7 @@ Will you be a part of the universal rhyme, and if so, which side are you on?
 # Hex colors for in/visible text (only visible used for now)
 rgba_hidden = "#00000000"
 rgba_visible = "#FFFFFFFF"
-rgba_background = "#000000FF"
+rgba_background = "#000000AA"
 
 intro = [
 """

src/credits.rs

@@ -47,7 +47,7 @@ fn init_credits_ui(
                             padding: UiRect::all(Val::Px(25.0)),
                             ..default()
                         },
-                        background_color: Color::BLACK.into(),
+                        background_color: Color::BLACK.with_a(0.9).into(),
                         ..default()
                     },
                 ))

src/display3d.rs

@@ -558,49 +558,72 @@ fn select(
     mut selections: EventWriter<game::Selection>,
     state: Res<State<game::TurnState>>,
 ) {
+    // For every mouse click event
     events
         .read()
+        // Only read button presses
         .filter(|ev| ev.state == ButtonState::Pressed)
         .for_each(|_| {
+            // For each window (there should be only one)
             windows.iter().for_each(|window| {
+                // Get the cursor position
                 if let Some(pos) = window.cursor_position() {
+                    // iterate over every camera
                     cameras.iter().for_each(|(camera, gt)| {
+                        // Get a ray from the camera through the cursor into the world
                         if let Some(ray) = camera.viewport_to_world(gt, pos) {
+                            // Iterate over every entity with a 3d scene
                             query
                                 .iter()
+                                // Transform the scene handle into mesh data
                                 .filter_map(|(entity, handle, gt)| {
                                     meshes.get(handle).map(|mesh| (entity, mesh, gt))
                                 })
-                                .for_each(|(entity, mesh, gt)| {
-                                    if let Some(_hit) = hit::intersects3d(&ray, mesh, gt) {
-                                        selectable
-                                            .iter()
-                                            .find_map(|(e, &board_index, &side)| {
-                                                // Check the side of the selection if no piece is selected
-                                                // Otherwise this is fine, select away
-                                                let side_check =
-                                                    !selected.is_empty() || state.get().0 == side;
-
-                                                let hit_check = {
-                                                    // This entity was hit (tile hitboxes)
-                                                    let primary = entity == e;
-
-                                                    // A child was hit (pieces)
-                                                    let secondary = children
-                                                        .iter_descendants(e)
-                                                        .any(|child| child == entity);
-
-                                                    primary || secondary
-                                                };
-
-                                                (side_check && hit_check).then_some(board_index)
-                                            })
-                                            .iter()
-                                            .for_each(|&board_index| {
-                                                info!("Board index selected: {:?}", board_index);
-                                                selections.send(game::Selection(board_index));
-                                            });
-                                    }
+                                // Iterate over every mesh + global transform
+                                .filter_map(|(entity, mesh, gt)| {
+                                    // If the camera -> cursor -> * ray intersects with the mesh
+                                    hit3d::intersects3d(&ray, mesh, gt).map(|hit| (entity, hit))
+                                })
+                                .filter_map(|(entity, hit)| {
+                                    // Find this entity in the set of selectable entities
+                                    selectable
+                                        .iter()
+                                        .find_map(|(e, &board_index, &side)| {
+                                            // Check the side of the selection if no piece is selected
+                                            // Otherwise this is fine, select away
+                                            let side_check =
+                                                !selected.is_empty() || state.get().0 == side;
+
+                                            let hit_check = {
+                                                // This entity was hit (tile hitboxes)
+                                                let primary = entity == e;
+
+                                                // A child was hit (pieces)
+                                                let secondary = children
+                                                    .iter_descendants(e)
+                                                    .any(|child| child == entity);
+
+                                                primary || secondary
+                                            };
+
+                                            // Return the board index of this piece
+                                            (side_check && hit_check).then_some(board_index)
+                                        })
+                                        .map(|board_index| {
+                                            // Include the hit from the camera
+                                            (hit, board_index)
+                                        })
+                                })
+                                // Compare the distance of all hits, choosing the closest one
+                                .min_by(|(hit_a, _), (hit_b, _)| {
+                                    hit_a.distance.partial_cmp(&hit_b.distance).unwrap()
+                                })
+                                // Iterate over the 0 or 1 outcomes of the above
+                                .iter()
+                                // Send an event that this board index was selected
+                                .for_each(|(_, board_index)| {
+                                    info!("Board index selected: {:?}", board_index);
+                                    selections.send(game::Selection(*board_index));
                                 });
                         }
                     });

src/hit3d.rs

@@ -3,7 +3,7 @@ use crate::prelude::*;
 /// Hit data for 3d objects in Global (not Local) space and the distance from the Camera
 #[derive(Debug)]
 pub(crate) struct Hit3d {
-    distance: f32,
+    pub distance: f32,
     _point: Vec3,
 }
 

src/main.rs

@@ -8,7 +8,7 @@ mod credits;
 mod debug;
 mod display3d;
 mod game;
-mod hit;
+mod hit3d;
 mod intro;
 mod loading;
 mod menu;