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use ffi;
use glib::translate::*;
use crate::Matrix;
use crate::Quaternion;

glib_wrapper! {
    #[derive(Debug, Hash)] // PartialOrd, Ord,
    pub struct Euler(Boxed<ffi::CoglEuler>);

    match fn {
        copy => |ptr| ffi::cogl_euler_copy(mut_override(ptr)),
        free => |ptr| ffi::cogl_euler_free(ptr),
        get_type => || ffi::cogl_euler_get_gtype(),
    }
}

impl Euler {
    /// Initializes `self` to represent a rotation of `x_angle` degrees
    /// around the x axis, then `y_angle` degrees around the y_axis and
    /// `z_angle` degrees around the z axis.
    ///
    /// ## `heading`
    /// Angle to rotate around an object's y axis
    /// ## `pitch`
    /// Angle to rotate around an object's x axis
    /// ## `roll`
    /// Angle to rotate around an object's z axis
    pub fn init(&mut self, heading: f32, pitch: f32, roll: f32) {
        unsafe {
            ffi::cogl_euler_init(self.to_glib_none_mut().0, heading, pitch, roll);
        }
    }

    /// Extracts a euler rotation from the given `matrix` and
    /// initializses `self` with the component x, y and z rotation angles.
    ///
    /// ## `matrix`
    /// A `Matrix` containing a rotation, but no scaling,
    ///  mirroring or skewing.
    pub fn init_from_matrix(&mut self, matrix: &Matrix) {
        unsafe {
            ffi::cogl_euler_init_from_matrix(self.to_glib_none_mut().0, matrix.to_glib_none().0);
        }
    }

    /// Initializes a `self` rotation with the equivalent rotation
    /// represented by the given `quaternion`.
    ///
    /// ## `quaternion`
    /// A `Euler` with the rotation to initialize with
    pub fn init_from_quaternion(&mut self, quaternion: &Quaternion) {
        unsafe {
            ffi::cogl_euler_init_from_quaternion(self.to_glib_none_mut().0, quaternion.to_glib_none().0);
        }
    }

    //pub fn equal(v1: /*Unimplemented*/Option<Fundamental: Pointer>, v2: /*Unimplemented*/Option<Fundamental: Pointer>) -> Bool {
    //    unsafe { TODO: call cogl_sys:cogl_euler_equal() }
    //}
}

//TODO:
// impl PartialEq for Euler {
//     #[inline]
//     fn eq(&self, other: &Self) -> bool {
//         // self.equal(other)
//     }
// }

// impl Eq for Euler {}