![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/cube.gif) |
Three perpendicular lines create a cube. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/cyl.gif) |
Two parallel lines drawn in the same direction create a cylinder. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/cone.gif) |
Two non-axis aligned lines that meet at a point create a cone. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/truncone.gif) |
Two non-axis aligned lines that do not meet at a point create a truncated cone. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/sphere.gif) |
A closed curve followed by a dot create a sphere. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/pyramid.gif) |
Two perpendicular axis-aligned lines and a dot create a pyramid. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/squad.gif) |
Three axis-aligned lines which do not meet exactly at a point create a superquadric. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/truncpyr.gif) |
Two pairs of perpendicular axis-aligned lines create a truncated pyramid. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/triprism.gif) |
Two perpendicular axis-aligned lines and two parallel lines create a triprism. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/extrpath.gif) |
Two perpendicular axis-aligned lines followed by a curve create an extruded rectangle. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/revolve.gif) |
An unclosed curve creates an object of revolution. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/extrpoly.gif) |
A non-axis aligned line, a series of dots forming a closed polyline, then an axis of extrusion create an extruded polyline. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/duct.gif) |
A closed curve, an axis-aligned line, and a curve create a duct. The line is the normal of the plane in which the curve lies. |
![](/file/16650/SIGGRAPH 1996: Proceedings.iso/pc/papers/zeleznik/gif/freehand.gif) |
Clicking and dragging the first mouse button with the shift key pressed draws on the surface beneath the cursor. |