Three Shifts
Mucking about with Riley's shift. Two different geometrically controlled shifts and one by function. The triangles are formed by a top edge of length 1 and a number from 0 to 1 identifying the opposite vertex. The function just takes the absolute value of the decimal part of the output. The geometric models use the control points to dictate the rate of the shift. Riley's is not a constant change, but an awesome effect.
You can zoom in or out to get less or more triangles.
Shift, Bridget Riley, 1963
