> I've been trying '*(verticesODE)[0] = > verticesDX[i]._x;'...'*verticesODE++' to no avail too. Try this { verticesODE [i] [0] = verticesODE [i] [1] = verticesODE [i] [2] = verticesODE [i] [3] = } or, if you prefer: { verticesODE [0] = verticesODE [1] = verticesODE [2] = verticesODE [3] = verticesODE++; } -- gl