relative shape rotation fixes

Author: AustinEast

echo/Shape.hx

@@ -148,7 +148,7 @@ class Shape implements IProxy {
 
   public function set_parent(?frame:Frame2) {
     parent_frame = frame;
-    if (parent_frame != null) sync();
+    sync();
   }
   /**
    * Returns an AABB `Rect` representing the bounds of the `Shape`.

echo/shape/Circle.hx

@@ -77,7 +77,7 @@ class Circle extends Shape implements IPooled {
       var pos = parent_frame.transformFrom(get_local_position());
       _x = pos.x;
       _y = pos.y;
-      _rotation = parent_frame.angleDegrees.degToRad() + local_rotation;
+      _rotation = parent_frame.angleDegrees + local_rotation;
     }
     else {
       _x = local_x;

echo/shape/Polygon.hx

@@ -156,7 +156,7 @@ class Polygon extends Shape implements IPooled {
       var pos = parent_frame.transformFrom(get_local_position());
       _x = pos.x;
       _y = pos.y;
-      _rotation = parent_frame.angleDegrees.degToRad() + local_rotation;
+      _rotation = parent_frame.angleDegrees + local_rotation;
     }
     else {
       _x = local_x;
@@ -232,11 +232,11 @@ class Polygon extends Shape implements IPooled {
     var pos = get_local_position();
     vertices.resize(0);
     local_frame.offset.set(pos.x, pos.y);
-    local_frame.angleDegrees = rotation;
+    local_frame.angleDegrees = local_rotation;
+    if (parent_frame != null) local_frame = parent_frame.concat(local_frame);
     for (i in 0...count) {
       if (local_vertices[i] == null) continue;
-      if (parent_frame == null) vertices[i] = local_frame.transformFrom(local_vertices[i].clone());
-      else vertices[i] = parent_frame.concat(local_frame).transformFrom(local_vertices[i].clone());
+      vertices[i] = local_frame.transformFrom(local_vertices[i].clone());
     }
   }
   /**

echo/shape/Rect.hx

@@ -130,7 +130,7 @@ class Rect extends Shape implements IPooled {
       var pos = parent_frame.transformFrom(get_local_position());
       _x = pos.x;
       _y = pos.y;
-      _rotation = parent_frame.angleDegrees.degToRad() + local_rotation;
+      _rotation = parent_frame.angleDegrees + local_rotation;
     }
     else {
       _x = local_x;

haxelib.json

@@ -5,8 +5,8 @@
     "description": "Simple Physics Library written in Haxe",
     "contributors": ["austineast"],
     "url": "https://austineast.dev/echo",
-    "releasenote": "TileMap Collider Generation",
-    "version": "1.2.0",
+    "releasenote": "relative shape rotation fixes",
+    "version": "1.2.1",
     "dependencies": {
       "hxmath": ""
     }

sample/state/MultiShapeState.hx

@@ -18,11 +18,6 @@ class MultiShapeState extends BaseState {
         // rotational_velocity: 25,
         rotation: Random.range(0, 360),
         shapes: [
-          // {
-          //   type: RECT,
-          //   width: 32,
-          //   radius: 16
-          // },
           {
             type: i % 2 == 0 ? CIRCLE : RECT,
             offset_x: 16,

sample/state/TileMapState.hx

@@ -82,7 +82,7 @@ class TileMapState extends BaseState {
 
     // Reset any off-screen Bodies
     world.for_each((member) -> {
-      if (offscreen(member, world)) {
+      if (member != cursor && offscreen(member, world)) {
         member.velocity.set(0, 0);
         member.set_position(Random.range(0, world.width), 0);
       }