roblox_emulator: implement Vector3.__mul

lib/roblox_emulator/src/runner/vector3.rs

@@ -1,3 +1,5 @@
+use mlua::FromLua;
+
 use super::number::Number;
 
 #[derive(Clone,Copy)]
@@ -55,6 +57,20 @@ impl mlua::UserData for Vector3{
 
 		methods.add_meta_function(mlua::MetaMethod::Add,|_,(Vector3(this),Vector3(val)):(Self,Self)|Ok(Self(this+val)));
 		methods.add_meta_function(mlua::MetaMethod::Sub,|_,(Vector3(this),Vector3(val)):(Self,Self)|Ok(Self(this-val)));
+		methods.add_meta_function(mlua::MetaMethod::Mul,|lua,(lhs,rhs):(mlua::Value,mlua::Value)|{
+			match (lhs,rhs){
+				(mlua::Value::UserData(lhs),mlua::Value::UserData(rhs))=>lhs.borrow_scoped(|Vector3(lhs):&Vector3|rhs.borrow_scoped(|Vector3(rhs):&Vector3|Self(lhs*rhs)))?,
+				(lhs,mlua::Value::UserData(rhs))=>{
+					let lhs=Number::from_lua(lhs,lua)?;
+					rhs.borrow_scoped(|Vector3(rhs):&Vector3|Self(lhs.to_f32()*rhs))
+				},
+				(mlua::Value::UserData(lhs),rhs)=>{
+					let rhs=Number::from_lua(rhs,lua)?;
+					lhs.borrow_scoped(|Vector3(lhs):&Vector3|Self(lhs*rhs.to_f32()))
+				},
+				_=>Err(mlua::Error::runtime(format!("Expected Vector3")))
+			}
+		});
 		methods.add_meta_function(mlua::MetaMethod::Div,|_,(Vector3(this),val):(Self,mlua::Value)|{
 			match val{
 				mlua::Value::Integer(n)=>Ok(Self(this/(n as f32))),