Fix inverted UP/DOWN for Vector3 and Vector3i

Close #104

Author: Bromeon

godot-core/src/builtin/vector3.rs

@@ -46,10 +46,10 @@ impl Vector3 {
     pub const RIGHT: Self = Self::new(1.0, 0.0, 0.0);
 
     /// Unit vector in -Y direction. Typically interpreted as down in a 3D world.
-    pub const UP: Self = Self::new(0.0, -1.0, 0.0);
+    pub const UP: Self = Self::new(0.0, 1.0, 0.0);
 
     /// Unit vector in +Y direction. Typically interpreted as up in a 3D world.
-    pub const DOWN: Self = Self::new(0.0, 1.0, 0.0);
+    pub const DOWN: Self = Self::new(0.0, -1.0, 0.0);
 
     /// Unit vector in -Z direction. Can be interpreted as "into the screen" in an untransformed 3D world.
     pub const FORWARD: Self = Self::new(0.0, 0.0, -1.0);

godot-core/src/builtin/vector3i.rs

@@ -45,10 +45,10 @@ impl Vector3i {
     pub const RIGHT: Self = Self::new(1, 0, 0);
 
     /// Unit vector in -Y direction.
-    pub const UP: Self = Self::new(0, -1, 0);
+    pub const UP: Self = Self::new(0, 1, 0);
 
     /// Unit vector in +Y direction.
-    pub const DOWN: Self = Self::new(0, 1, 0);
+    pub const DOWN: Self = Self::new(0, -1, 0);
 
     /// Unit vector in -Z direction.
     pub const FORWARD: Self = Self::new(0, 0, -1);