cgmath/tests/angle.rs

// Copyright 2013-2014 The CGMath Developers. For a full listing of the authors,
// refer to the Cargo.toml file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

extern crate cgmath;

use cgmath::{Angle, Rad, Deg, rad, deg};
use cgmath::ApproxEq;

#[test]
fn conv() {
    let angle: Rad<_> = deg(-5.0f64).into();
    let angle: Deg<_> = angle.into();
    assert!(angle.approx_eq(&deg(-5.0f64)));

    let angle: Rad<_> = deg(30.0f64).into();
    let angle: Deg<_> = angle.into();
    assert!(angle.approx_eq(&deg(30.0f64)));

    let angle: Deg<_> = rad(-5.0f64).into();
    let angle: Rad<_> = angle.into();
    assert!(angle.approx_eq(&rad(-5.0f64)));

    let angle: Deg<_> = rad(30.0f64).into();
    let angle: Rad<_> = angle.into();
    assert!(angle.approx_eq(&rad(30.0f64)));
}

#[test]
fn equiv() {
    assert!(Deg::<f32>::full_turn().equiv(&-Deg::<f32>::full_turn()));
    assert!(Deg::<f32>::turn_div_2().equiv(&-Deg::<f32>::turn_div_2()));
    assert!((Deg::<f32>::turn_div_3() - Deg::<f32>::full_turn()).equiv(&Deg::<f32>::turn_div_3()));

    assert!(Rad::<f32>::full_turn().equiv(&-Rad::<f32>::full_turn()));
    assert!(Rad::<f32>::turn_div_2().equiv(&-Rad::<f32>::turn_div_2()));
    assert!((Rad::<f32>::turn_div_3() - Rad::<f32>::full_turn()).equiv(&Rad::<f32>::turn_div_3()));
}