Hi,
The starting point position of what? The 3D model? If yes, you can just specify the coordinates when you display the shape with shape(s, x, y)
What do you mean by a “location that starts”? You want to animate the model?
Yes, you can take a look at the camera() function :
camera(eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ)
Sets the position of the camera through setting the eye position, the center of the scene, and which axis is facing upward.
Hope it helps 