source: other-projects/playing-in-the-street/summer-2013/trunk/Playing-in-the-Street-WPF/Content/Web/mrdoob-three.js-4862f5f/test/unit/math/Euler.js@ 28897

/**
 * @author bhouston / http://exocortex.com
 */

module( "Euler" );

var eulerZero = new THREE.Euler( 0, 0, 0, "XYZ" );
var eulerAxyz = new THREE.Euler( 1, 0, 0, "XYZ" );
var eulerAzyx = new THREE.Euler( 0, 1, 0, "ZYX" );
    
var matrixEquals4 = function( a, b, tolerance ) {
    tolerance = tolerance || 0.0001;
    if( a.elements.length != b.elements.length ) {
        return false;
    }
    for( var i = 0, il = a.elements.length; i < il; i ++ ) {
        var delta = a.elements[i] - b.elements[i];
        if( delta > tolerance ) {
            return false;
        }
    }
    return true;
};

test( "constructor/equals", function() {
    var a = new THREE.Euler();
    ok( a.equals( eulerZero ), "Passed!" );
    ok( ! a.equals( eulerAxyz ), "Passed!" );
    ok( ! a.equals( eulerAzyx ), "Passed!" );
});

test( "clone/copy/equals", function() {
    var a = eulerAxyz.clone();
    ok( a.equals( eulerAxyz ), "Passed!" );
    ok( ! a.equals( eulerZero ), "Passed!" );
    ok( ! a.equals( eulerAzyx ), "Passed!" );

    a.copy( eulerAzyx );
    ok( a.equals( eulerAzyx ), "Passed!" );
    ok( ! a.equals( eulerAxyz ), "Passed!" );
    ok( ! a.equals( eulerZero ), "Passed!" );

});

test( "set", function() {
    var a = new THREE.Euler();

    a.set( 0, 1, 0, "ZYX" );
    ok( a.equals( eulerAzyx ), "Passed!" );
    ok( ! a.equals( eulerAxyz ), "Passed!" );
    ok( ! a.equals( eulerZero ), "Passed!" );
});

test( "Quaternion.setFromEuler/Euler.fromQuaternion", function() {
    var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
    for( var i = 0; i < testValues.length; i ++ ) {
        var v = testValues[i];
        var q = new THREE.Quaternion().setFromEuler( v );

        var v2 = new THREE.Euler().setFromQuaternion( q, v.order );
        var q2 = new THREE.Quaternion().setFromEuler( v2 );
        ok( q.equals( q2 ), "Passed!" );    
    }
});


test( "Matrix4.setFromEuler/Euler.fromRotationMatrix", function() {
    var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
    for( var i = 0; i < testValues.length; i ++ ) {
        var v = testValues[i];
        var m = new THREE.Matrix4().makeRotationFromEuler( v );

        var v2 = new THREE.Euler().setFromRotationMatrix( m, v.order );
        var m2 = new THREE.Matrix4().makeRotationFromEuler( v2 );
        ok( matrixEquals4( m, m2, 0.0001 ), "Passed!" );    
    }
});

test( "reorder", function() {
    var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
    for( var i = 0; i < testValues.length; i ++ ) {
        var v = testValues[i];
        var q = new THREE.Quaternion().setFromEuler( v );

        v.reorder( 'YZX' );     
        var q2 = new THREE.Quaternion().setFromEuler( v );
        ok( q.equals( q2 ), "Passed!" );    

        v.reorder( 'ZXY' );
        var q3 = new THREE.Quaternion().setFromEuler( v );
        ok( q.equals( q3 ), "Passed!" );    
    }
});