public float getTerrainHeight(float worldX,float worldZ) {
		float terrainX = worldX - this.x;
		float terrainZ = worldZ - this.z;
		if(this.x > worldX) {
			terrainX = this.x - worldX;
		}
		if(this.z > worldZ) {
			terrainZ = this.z - worldZ;
		}

		float gridSize = SIZE / ((float) heights.length -1);
		int gridX = (int) floor(terrainX / gridSize);
		int gridZ = (int) floor(terrainZ / gridSize);

		if(gridX >= heights.length - 1 || gridZ >= heights.length - 1 || gridX <= 0 || gridZ <= 0) {
			return 0;

 _o\       *

	Complex[] buffer = new Complex[sampleInspectWindowLength];
	provider.GetFftData(buffer);

	float[] frequencyAmplitudesBuffer = new float[sampleInspectWindowLength];
	for (var i = 0; i < sampleInspectWindowLength; i++)
	{
		var c = buffer[i];
		//compute the square of their module and store it into a new 1024 buffer
		frequencyAmplitudesBuffer[i] = (float) (Math.Pow(c.Real, 2) + Math.Pow(c.Imaginary, 2));
	}