From 17eb1428875c2de91a3d00eda79ce4a26bc20a0a Mon Sep 17 00:00:00 2001
From: blaiz <arbeit.t.lechner@gmail.com>
Date: Thu, 16 Jan 2025 15:24:49 +0100
Subject: [PATCH] add checkerbox background to tile selector

---
 game/editor/src/tools/tile_layer/brush.rs | 10 ++----
 game/editor/src/tools/utils.rs            | 39 +++++++++++++++++++++++
 2 files changed, 41 insertions(+), 8 deletions(-)

diff --git a/game/editor/src/tools/tile_layer/brush.rs b/game/editor/src/tools/tile_layer/brush.rs
index a317fef..2433c3b 100644
--- a/game/editor/src/tools/tile_layer/brush.rs
+++ b/game/editor/src/tools/tile_layer/brush.rs
@@ -46,7 +46,7 @@ use crate::{
         upload_design_tile_layer_buffer, upload_physics_layer_buffer,
     },
     tools::utils::{
-        render_filled_rect, render_filled_rect_from_state, render_rect, render_rect_from_state,
+        render_checkerboard_background, render_filled_rect, render_filled_rect_from_state, render_rect, render_rect_from_state
     },
     utils::{ui_pos_to_world_pos, UiCanvasSize},
 };
@@ -1566,13 +1566,7 @@ impl TileBrush {
                 canvas_handle.canvas_width(),
                 canvas_handle.canvas_height(),
             );
-            render_filled_rect_from_state(
-                stream_handle,
-                render_rect,
-                ubvec4::new(0, 0, 0, 255),
-                state,
-                false,
-            );
+            render_checkerboard_background(stream_handle, render_rect, &state);
 
             state.map_canvas(
                 tl_x,
diff --git a/game/editor/src/tools/utils.rs b/game/editor/src/tools/utils.rs
index 4570261..1711151 100644
--- a/game/editor/src/tools/utils.rs
+++ b/game/editor/src/tools/utils.rs
@@ -76,6 +76,45 @@ pub fn render_rect(
     render_rect_from_state(stream_handle, state, rect, color)
 }
 
+pub fn render_checkerboard_background(
+    stream_handle: &GraphicsStreamHandle,
+    render_rect: egui::Rect,
+    state: &State,
+) {
+    const FIELD_SIZE: f32 = 15.0;
+    
+    let cols = (render_rect.width() / FIELD_SIZE).ceil() as i32;
+    let rows = (render_rect.height() / FIELD_SIZE).ceil() as i32;
+    
+    let color1 = ubvec4::new(180, 180, 180, 255);
+    let color2 = ubvec4::new(140, 140, 140, 255);
+    
+    for row in 0..rows {
+        for col in 0..cols {
+            let x = render_rect.min.x + (col as f32 * FIELD_SIZE);
+            let y = render_rect.min.y + (row as f32 * FIELD_SIZE);
+            
+            let checker_rect = egui::Rect::from_min_size(
+                egui::pos2(x, y),
+                egui::vec2(
+                    FIELD_SIZE.min(render_rect.max.x - x),
+                    FIELD_SIZE.min(render_rect.max.y - y)
+                )
+            );
+            
+            let color = if (row + col) % 2 == 0 { color1 } else { color2 };
+            
+            render_filled_rect_from_state(
+                stream_handle,
+                checker_rect,
+                color,
+                state.clone(),
+                false,
+            );
+        }
+    }
+}
+
 pub fn render_filled_rect_from_state(
     stream_handle: &GraphicsStreamHandle,
     rect: egui::Rect,