function initSplineTexture( numberOfCurves = 1 ) {

		const dataArray = new Float32Array( TEXTURE_WIDTH * TEXTURE_HEIGHT * numberOfCurves * BITS );
		const dataTexture = new THREE.DataTexture( dataArray, TEXTURE_WIDTH, TEXTURE_HEIGHT * numberOfCurves, THREE.RGBFormat, THREE.FloatType );
		dataTexture.wrapS = THREE.RepeatWrapping;
		dataTexture.wrapY = THREE.RepeatWrapping;
		dataTexture.magFilter = THREE.NearestFilter;
		dataTexture.needsUpdate = true;
		return dataTexture;

	}
Make a new THREE.DataTexture to store the descriptions of the curves.

@param { number } numberOfCurves the number of curves needed to be described by this texture.