avm2: Expose and test `rotation`.

core/src/avm2/globals/flash/display/displayobject.rs

@@ -9,7 +9,7 @@ use crate::avm2::traits::Trait;
 use crate::avm2::value::Value;
 use crate::avm2::Error;
 use crate::display_object::TDisplayObject;
-use crate::types::Percent;
+use crate::types::{Degrees, Percent};
 use gc_arena::{GcCell, MutationContext};
 
 /// Implements `flash.display.DisplayObject`'s instance constructor.
@@ -259,6 +259,45 @@ pub fn set_y<'gc>(
     Ok(Value::Undefined)
 }
 
+/// Implements `rotation`'s getter.
+pub fn rotation<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    if let Some(dobj) = this.and_then(|this| this.as_display_object()) {
+        let rot: f64 = dobj.rotation(activation.context.gc_context).into();
+        let rem = rot % 360.0;
+
+        if rem <= 180.0 {
+            return Ok(Value::Number(rem));
+        } else {
+            return Ok(Value::Number(rem - 360.0));
+        }
+    }
+
+    Ok(Value::Undefined)
+}
+
+/// Implements `rotation`'s setter.
+pub fn set_rotation<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    this: Option<Object<'gc>>,
+    args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    if let Some(dobj) = this.and_then(|this| this.as_display_object()) {
+        let new_rotation = args
+            .get(0)
+            .cloned()
+            .unwrap_or(Value::Undefined)
+            .coerce_to_number(activation)?;
+
+        dobj.set_rotation(activation.context.gc_context, Degrees::from(new_rotation));
+    }
+
+    Ok(Value::Undefined)
+}
+
 /// Construct `DisplayObject`'s class.
 pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
     let class = Class::new(
@@ -327,6 +366,14 @@ pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>
         QName::new(Namespace::package(""), "y"),
         Method::from_builtin(set_y),
     ));
+    write.define_instance_trait(Trait::from_getter(
+        QName::new(Namespace::package(""), "rotation"),
+        Method::from_builtin(rotation),
+    ));
+    write.define_instance_trait(Trait::from_setter(
+        QName::new(Namespace::package(""), "rotation"),
+        Method::from_builtin(set_rotation),
+    ));
 
     class
 }

core/tests/regression_tests.rs

@@ -458,6 +458,7 @@ swf_tests_approx! {
     (as3_math, "avm2/math", 1, max_relative = 30.0 * std::f64::EPSILON),
     (as3_displayobject_height, "avm2/displayobject_height", 7, epsilon = 0.06), // TODO: height/width appears to be off by 1 twip sometimes
     (as3_displayobject_width, "avm2/displayobject_width", 7, epsilon = 0.06),
+    (as3_displayobject_rotation, "avm2/displayobject_rotation", 1, epsilon = 0.0000000001),
 }
 
 #[test]