/**

* @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;

};

var eulerEquals = function( a, b, tolerance ) {

tolerance = tolerance || 0.0001;

var diff = Math.abs( a.x - b.x ) + Math.abs( a.y - b.y ) + Math.abs( a.z - b.z );

return ( diff < tolerance );

};

var quatEquals = function( a, b, tolerance ) {

tolerance = tolerance || 0.0001;

var diff = Math.abs( a.x - b.x ) + Math.abs( a.y - b.y ) + Math.abs( a.z - b.z ) + Math.abs( a.w - b.w );

return ( diff < tolerance );

};

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/setFromVector3/toVector3", 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!" );

var vec = new THREE.Vector3( 0, 1, 0 );

var b = new THREE.Euler().setFromVector3( vec, "ZYX" );

ok( a.equals( b ), "Passed!" );

var c = b.toVector3();

ok( c.equals( vec ), "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( eulerEquals( q, 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( quatEquals( q, q2 ), "Passed!" );

v.reorder( 'ZXY' );

var q3 = new THREE.Quaternion().setFromEuler( v );

ok( quatEquals( q, q3 ), "Passed!" );

}

});

test( "gimbalLocalQuat", function() {

// known problematic quaternions

var q1 = new THREE.Quaternion( 0.5207769385244341, -0.4783214164122354, 0.520776938524434, 0.47832141641223547 );

var q2 = new THREE.Quaternion( 0.11284905712620674, 0.6980437630368944, -0.11284905712620674, 0.6980437630368944 );

var eulerOrder = "ZYX";

// create Euler directly from a Quaternion

var eViaQ1 = new THREE.Euler().setFromQuaternion( q1, eulerOrder ); // there is likely a bug here

// create Euler from Quaternion via an intermediate Matrix4

var mViaQ1 = new THREE.Matrix4().makeRotationFromQuaternion( q1 );

var eViaMViaQ1 = new THREE.Euler().setFromRotationMatrix( mViaQ1, eulerOrder );

// the results here are different

ok( eulerEquals( eViaQ1, eViaMViaQ1 ), "Passed!" ); // this result is correct

});