A test to create an adjustable triangle (or mesh) by using the mouse. (It is recommended to use full screen) 1. Click 3 vertices to form a triangle. 2. To add a vertex on an existing point, click a green point. 3. Space bar to undo. 4. zero key to toggle between triangle mesh with/without points. 5. To drag a vertex: a. Click and hold on a green point. b. Waits for the green color change to the red color. c. Drag the mouse.
