From 75de75100ce04d528112c7581472c0cca2c9cfc1 Mon Sep 17 00:00:00 2001
From: Dmitry Stepanov <d1maxa@yandex.ru>
Date: Tue, 23 Jul 2024 10:18:04 +0300
Subject: [PATCH] rect fill for tile map

---
 fyrox-impl/src/scene/tilemap/brush.rs | 15 +++++++++++++++
 fyrox-impl/src/scene/tilemap/mod.rs   | 23 +++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/fyrox-impl/src/scene/tilemap/brush.rs b/fyrox-impl/src/scene/tilemap/brush.rs
index d8ec49429..51ab41653 100644
--- a/fyrox-impl/src/scene/tilemap/brush.rs
+++ b/fyrox-impl/src/scene/tilemap/brush.rs
@@ -18,6 +18,7 @@ use crate::{
     },
     scene::{debug::SceneDrawingContext, tilemap::tileset::TileDefinitionHandle},
 };
+use fyrox_core::math::Rect;
 use std::{
     any::Any,
     error::Error,
@@ -118,6 +119,20 @@ pub struct TileMapBrush {
 }
 
 impl TileMapBrush {
+    /// Returns bounding rectangle of the tile map brush in grid coordinates.
+    #[inline]
+    pub fn bounding_rect(&self) -> Rect<i32> {
+        let mut min = Vector2::repeat(i32::MAX);
+        let mut max = Vector2::repeat(i32::MIN);
+
+        for tile in self.tiles.iter() {
+            min = tile.local_position.inf(&min);
+            max = tile.local_position.sup(&max);
+        }
+
+        Rect::from_points(min, max)
+    }
+
     /// Draw brush outline to the scene drawing context.
     pub fn draw_outline(
         &self,
diff --git a/fyrox-impl/src/scene/tilemap/mod.rs b/fyrox-impl/src/scene/tilemap/mod.rs
index 566c28731..3911c76c3 100644
--- a/fyrox-impl/src/scene/tilemap/mod.rs
+++ b/fyrox-impl/src/scene/tilemap/mod.rs
@@ -314,6 +314,29 @@ impl TileMap {
             }
         }
     }
+
+    /// Fills the given rectangle using the specified brush.
+    #[inline]
+    pub fn rect_fill(&mut self, rect: Rect<i32>, brush: &TileMapBrush) {
+        let brush_rect = brush.bounding_rect();
+        for y in
+            (rect.position.y..(rect.position.y + rect.size.y)).step_by(brush_rect.size.y as usize)
+        {
+            for x in (rect.position.x..(rect.position.x + rect.size.x))
+                .step_by(brush_rect.size.x as usize)
+            {
+                for brush_tile in brush.tiles.iter() {
+                    let position = Vector2::new(x, y) + brush_tile.local_position;
+                    if rect.contains(position) {
+                        self.insert_tile(Tile {
+                            position,
+                            definition_handle: brush_tile.definition_handle,
+                        });
+                    }
+                }
+            }
+        }
+    }
 }
 
 impl Default for TileMap {