From 30ef27e06fa2349098ea126b255e5e51872d324f Mon Sep 17 00:00:00 2001
From: Jakob Meier <comcloudway@ccw.icu>
Date: Tue, 15 Aug 2023 20:09:13 +0200
Subject: [PATCH] Added block-hover highlight to show which block is being
 focused right now

---
 src/screens/build.rs | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/screens/build.rs b/src/screens/build.rs
index e3d4cf7..691a235 100644
--- a/src/screens/build.rs
+++ b/src/screens/build.rs
@@ -250,6 +250,37 @@ impl GameComponent for BuildScreen {
             let mut render_order: Vec<(&Pos3, &(Block, Direction))> = world.grid.iter().collect();
             render_order.sort_by(|(p1, _), (p2, _)| p1.cmp(p2));
 
+
+            let (mx, my) = mouse_position();
+
+            // list of positions in render que for given pixel
+            // (mx, my)
+            let mut in_path: Vec<&Pos3> = Vec::new();
+
+            for (pos, _) in &render_order {
+                let (x, y) = get_screen_coords(pos, world.cam.scale, world.cam.center);
+
+                if mx >= x
+                    && mx <= TEXTURE_WIDTH.mul_add(world.cam.scale, x)
+                    && my >= TEXTURE_Y_WHITESPACE.mul_add(world.cam.scale, y)
+                    && my <= TEXTURE_HEIGHT.mul_add(world.cam.scale, y)
+                {
+                    // check if mouse is above transparent area
+                    // and skip block if necessary
+                    if Face::from_xy(mx - x, my - y, world.cam.scale).is_none() {
+                        continue;
+                    }
+
+                    // block in mouse path
+                    in_path.push(pos);
+                }
+            }
+            // weight axis
+            //in_path.sort_by(|p1, p2| p1.cmp(p2));
+            let focused = in_path.last();
+
+
+            // draw world
             for (pos, (block, dir)) in &render_order {
                 let texture = block.get_texture().await.get_dir(dir);
                 let width = TEXTURE_WIDTH * world.cam.scale;
@@ -258,12 +289,18 @@ impl GameComponent for BuildScreen {
                 let (x, y) = get_screen_coords(pos, world.cam.scale, world.cam.center);
 
                 if x >= -width && x <= screen_width() && y >= -height && y <= screen_height() {
+                    let mut color = WHITE;
+                    if let Some(focused_block_pos) = focused {
+                        if focused_block_pos == pos {
+                            color = LIGHTGRAY;
+                        }
+                    }
                     // render block
                     draw_texture_ex(
                         texture,
                         x,
                         y,
-                        WHITE,
+                        color,
                         DrawTextureParams {
                             dest_size: Some(Vec2::new(width, height)),
                             source: None,
-- 
2.38.5