3-d rendering.

There are several options for 3-d graphs rendering that may be configured by hitting the cfg button. First, you have to choose between intrinsic colors or a scene viewed with 1 to 8 light spots, see below.

Then you can choose the x, y, z ranged that will be visible. The position of the eye visualizing the scene may be changed by specifying a plan equation (normal to the vision direction). You may also easily change the view point outside of the cfg configuration window either with the mouse (push outside of the parallelepipedium, drag the mouse and release it at your option) or with the x,X, y,Y, z,Z keys to rotate around the x, y or z axis.

By hitting the r key or by selecting M->3-d->Animation rotation, you can get a visualization animation by rotation around the origin. By default, it will rotate the viewpoint around the z axis but this is configurable from the cfg button, you can configure

• Anim: what will be animated, viewpoint if bit8 is 1, spot number 7 to 0 if bit 7 to 0 are set to 1. For example, 255 will move all spots leaving the viewpoint unchanged.
• t: interval between 2 redrawing
• n: number of steps for a round trip
• x, y, z: coordinates of the axis
• d: normally 0, may be non 0 if you want also to move the number of image of a programmed animation

You can specify the axis of rotation in the commandline defining the scene by

gl_rotation_axis=[x,y,z]

where x,y,z are the coordinates of the axis of rotation.

Do not confuse visualization animation with programmed animation obtained by instructions like animate, animate3d, animation.