package nodebox.util.waves;

public class TriangleWave extends AbstractWave {

public TriangleWave(float period, float amplitude) {

super(period, 0f, amplitude);

}

public TriangleWave(float period, float phase, float amplitude) {

super(period, phase, amplitude);

}

public TriangleWave(float period, float phase, float amplitude, float offset) {

super(period, phase, amplitude, offset);

}

/**

* Creates a suitable TriangleWave object from other than the constructor arguments.

* The wave oscillates between min and max values

*

* @param min the minimum value

* @param max the maximum value

* @param period the length (expressed in time) over which the wave makes a full triangular movement

* @return a new TriangleWave

*/

public static TriangleWave from(float min, float max, float period) {

float amplitude = (max - min) / 2;

float offset = min + amplitude;

return new TriangleWave(period, 0f, amplitude, offset);

}

protected float computeValue(float phase) {

return Math.abs((phase / TWO_PI) * 2 - 1) * amplitude * 2 - amplitude;

}

protected float adjustedTime(float t) {

return t + getPeriod() / 4;

}

}