/*
* Copyright 2014 MovingBlocks
*
* 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.
*/
package org.terasology.world.sun;
import static org.terasology.world.time.WorldTime.DAY_LENGTH;
/**
* A simple implementations of {@link CelestialSystem} with constant daily events
* and perfect radial movement of a single sun.
*/
public class BasicCelestialModel implements CelestialModel {
private static final long DAWN_TIME = DAY_LENGTH / 4;
private static final long MIDDAY_TIME = DAY_LENGTH / 2;
private static final long DUSK_TIME = 3 * DAY_LENGTH / 4;
private static final long MIDNIGHT_TIME = 0;
@Override
public float getSunPosAngle(float days) {
return (float) (days * 2.0 * Math.PI - Math.PI); // offset by 180 deg.;
}
@Override
public long getDawn(long day) {
return DAWN_TIME;
}
@Override
public long getMidday(long day) {
return MIDDAY_TIME;
}
@Override
public long getDusk(long day) {
return DUSK_TIME;
}
@Override
public long getMidnight(long day) {
return MIDNIGHT_TIME;
}
}