Add RC orientation conversion

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libfj"
-version = "0.6.0"
+version = "0.6.1"
 authors = ["NGnius (Graham) <ngniusness@gmail.com>"]
 edition = "2018"
 description = "An unofficial collection of APIs used in FreeJam games and mods"

src/convert/mod.rs

@@ -5,4 +5,4 @@
 #[cfg(feature = "robocraft")]
 mod robocraft_3d;
 #[cfg(feature = "robocraft")]
-pub use robocraft_3d::{cubes_to_model, cubes_to_model_with_lut};
+pub use robocraft_3d::{cubes_to_model, cubes_to_model_with_lut, cube_rotation_to_quat};

src/convert/robocraft_3d.rs

@@ -32,6 +32,11 @@ const ROTATIONS: [Euler<Deg<f32>>; 24] = [
     Euler{x: Deg(-90.0), y: Deg(180.0), z: Deg(0.0)}, // 23
 ];
 
+/// Convert a Robocraft robot's orientation enum into a physical rotation
+pub fn cube_rotation_to_quat(orientation: u8) -> Quaternion<f32> {
+    ROTATIONS[orientation as usize].into()
+}
+
 /// Convert a Robocraft robot to a 3D model in Wavefront OBJ format.
 pub fn cubes_to_model(robot: robocraft::Cubes) -> obj::Obj {
     cubes_to_model_with_lut(robot, default_model_lut)
@@ -47,7 +52,7 @@ pub fn cubes_to_model_with_lut<F: FnMut(u32) -> Vec<Quad<Vertex>>>(robot: robocr
         // generate simple cube for every block
         // TODO rotate blocks
         let vertices = lut(cube.id); // Use lookup table to find correct id <-> block translation
-        let rotation: Quaternion<_> = ROTATIONS[cube.orientation as usize].into();
+        let rotation: Quaternion<_> = cube_rotation_to_quat(cube.orientation);
         positions.extend::<Vec::<[f32; 3]>>(
             vertices.clone().into_iter().vertex(|v|
                 {