[common] rect intersection

src/common/haxe/ru/m/geom/Rectangle.hx

@@ -7,6 +7,10 @@ class Rectangle {
     public var height(default, default):Float;
     public var center(get, set):Point;
     public var direction(default, set):Direction;
+    public var left(get, null):Float;
+    public var right(get, null):Float;
+    public var top(get, null):Float;
+    public var bottom(get, null):Float;
 
     public function new(x:Float, y:Float, width:Float, height:Float) {
         this.x = x;
@@ -61,7 +65,39 @@ class Rectangle {
         return point.x >= x && point.y >= y && point.x <= width && point.y <= height;
     }
 
+    public function intersection(rect:Rectangle):Bool {
+        return !(rect.left > right ||
+                 rect.right < left ||
+                 rect.top > bottom ||
+                 rect.bottom < top);
+    }
+
+    public function lean(rect:Rectangle):Void {
+        var side = rect.getSide(direction);
+        if (direction.x != 0) {
+            x = side.point1.x - width * (direction.x + 1) / 2 - direction.x;
+        } else if (direction.y != 0) {
+            y = side.point1.y - height * (direction.y + 1) / 2 - direction.y;
+        }
+    }
+
     public function toString():String {
         return 'Rectangle{x=$x,y=$y,width=$width,height=$height}';
     }
+
+    function get_left():Float {
+        return x;
+    }
+
+    function get_right():Float {
+        return x + width;
+    }
+
+    function get_top():Float {
+        return y;
+    }
+
+    function get_bottom():Float {
+        return y + height;
+    }
 }

src/common/haxe/ru/m/tankz/core/Bullet.hx

@@ -1,17 +1,19 @@
 package ru.m.tankz.core;
 
-import ru.m.tankz.config.Config.BulletConfig;
+import ru.m.tankz.config.Config;
 import ru.m.geom.Rectangle;
 import ru.m.geom.Direction;
 
 
 class Bullet extends MobileEntity {
     public var tankId(default, null):Int;
+    public var tankConfig(default, null):TankConfig;
     public var config(default, null):BulletConfig;
 
-    public function new(tankId:Int, config:BulletConfig) {
+    public function new(tankId:Int, tankConfig:TankConfig, config:BulletConfig) {
         super(new Rectangle(0, 0, config.width, config.height), config.speed, Direction.RIGHT);
         this.tankId = tankId;
+        this.tankConfig = tankConfig;
         this.config = config;
         this.layer = 2;
     }

src/common/haxe/ru/m/tankz/core/Tank.hx

@@ -37,7 +37,7 @@ class Tank extends MobileEntity {
 
     public function shot():Null<Bullet> {
         if (bulletsCounter >= config.bullets) return null;
-        var bullet = new Bullet(id, config.bullet);
+        var bullet = new Bullet(id, config, config.bullet);
         bullet.rect.center = rect.center.add(new Point(rect.width / 4 * direction.x, rect.height / 4 * direction.y));
         bullet.move(direction);
         bulletsCounter++;

src/common/haxe/ru/m/tankz/engine/Engine.hx

@@ -1,5 +1,6 @@
 package ru.m.tankz.engine;
 
+import ru.m.geom.Rectangle;
 import ru.m.geom.Line;
 import ru.m.tankz.core.MobileEntity;
 import ru.m.tankz.core.Entity;
@@ -168,17 +169,25 @@ class Engine {
                 var collision:Bool = false;
                 for (cell in cells) {
                     if (cell.layer >= entity.layer && cell.layer < 3) {
-                        var cellSide:Line = cell.rect.getSide(entity.rect.direction);
-                        if (entity.rect.direction.x != 0) {
-                            entity.rect.x = cellSide.point1.x - entity.rect.width * (entity.rect.direction.x + 1) / 2 - entity.direction.x;
-                        } else if (entity.rect.direction.y != 0) {
-                            entity.rect.y = cellSide.point1.y - entity.rect.height * (entity.rect.direction.y + 1) / 2 - entity.direction.y;
-                        }
+                        entity.rect.lean(cell.rect);
                         collision = true;
                         break;
                     }
                 }
 
+                for (other in entities.iterator()) {
+                    if (other != ent) {
+                        if (ent.rect.intersection(other.rect)) {
+                            if (Std.is(ent, Bullet) && Std.is(other, Tank) && (cast(ent, Bullet).tankConfig.group == cast(other, Tank).config.group)) {
+                                collision = false;
+                            } else {
+                                entity.rect.lean(other.rect);
+                                collision = true;
+                            }
+                        }
+                    }
+                }
+
                 changes.push(new GameChange()
                     .setType(GameChangeType.MOVED)
                     .setObjectType(objectType)