public static Sampler triangular(final double c) {
		return triangular(0, c, 1.0);
	}
Return a new sampler for a <em>normalized</em> triangle distribution
with the points {@code [0, c, 1]}.

@see #triangular(double, double, double)

@param c the middle point of the triangle within the range {@code [0, 1]}
@return a new triangle distribution sampler
@throws IllegalArgumentException if c not within {@code [0, 1]}
jenetics/src/main/java/io/jenetics/stat/Samplers.java