added ability to jump through one way platforms

Author: 01010111

zero/flxutil/ecs/components/PlatformerJumper.hx

@@ -1,9 +1,14 @@
 package zero.flxutil.ecs.components;
 
+import flixel.tile.FlxTilemap;
+import flixel.FlxObject;
 import flixel.FlxObject.*;
 import zero.flxutil.input.Controller;
 import zero.flxutil.ecs.Component;
 
+using zero.ext.flx.FlxTilemapExt;
+using zero.ext.flx.FlxSpriteExt;
+
 /**
  * A Component to make an entity in a platformer Jump
  */
@@ -14,6 +19,8 @@ class PlatformerJumper extends Component
 	var jump_button:ControllerButton;
 	var controller:Controller;
 	var coyote_time:Float;
+	var jump_down:Bool;
+	var tiles:FlxTilemap;
 
 	var coyote_timer:Float;
 	var just_jumped_timer:Float;
@@ -29,6 +36,8 @@ class PlatformerJumper extends Component
 		jump_button = options.jump_button;
 		controller = options.controller;
 		coyote_time = options.coyote_time;
+		jump_down = options.jump_down != null;
+		if (jump_down) tiles = options.jump_down.tiles;
 	}
 
 	@:dox(hide)
@@ -37,21 +46,37 @@ class PlatformerJumper extends Component
 		if (coyote_timer > 0) coyote_timer -= dt;
 		if (just_jumped_timer > 0) just_jumped_timer -= dt;
 
+		if (jump_down && can_jump_down()) return;
+
 		if (entity.wasTouching & FLOOR > 0) coyote_timer = coyote_time;
 		if (controller.just_pressed(jump_button)) just_jumped_timer = coyote_time;
 		if (controller.just_released(jump_button) && velocity.y < 0) velocity.y *= 0.5;
 
 		if (just_jumped_timer <= 0 || coyote_timer <= 0) return;
+
 		velocity.y = -jump_power;
 		just_jumped_timer = 0;
 	}
 
+	function can_jump_down():Bool
+	{
+		if (!controller.just_pressed(jump_button) || !controller.pressed(DPAD_DOWN)) return false;
+		if (tiles.get_collisions_from_point(entity.get_anchor().add(0, 1)) & 0x1000 == 0) y += FlxObject.SEPARATE_BIAS + 0.001;
+		return true;
+	}
+
 }
 
 typedef JumperOptions = 
 {
 	controller:Controller,
 	jump_power:Float,
 	jump_button:ControllerButton,
-	coyote_time:Float
+	coyote_time:Float,
+	?jump_down:JumpDownOptions,
+}
+
+typedef JumpDownOptions =
+{
+	tiles:FlxTilemap,
 }