VAX3DX is a simple 3-d surface plotting routine. The y value of the surface at the intersection of the slice plane and the y value plotted. Hidden lines are supressed, giving the illusion of a 3 dimensional surface. The height of plotted surface relative to its y axis value is calibrated to x and z axis. No perspective is used.
Options exist to varying the plotting angle and to plot axes.
Origin of the plot is in the lower-left corner. The x axis runs left to right along the plot bottom. The y axis is plotted as a vertical displacement offset by the z axis value. The z axis appears to point into the screen. This, with the hidden line removal, gives the illusion of depth.