You can switch the camera between perspective and orthographic projections at any time.
Switching the camera to orthographic projection:
Setting the camera's orthographic projection properties:
viewer.setOrthoScale(2.0); // How many units to fit within view volume viewer.setOrthoNear(0.1); viewer.setOrthoFar(8000);
Switching the camera to perspective projection:
Setting perspective projection properties:
viewer.setPerspectiveFOV(50); // Field of view in degrees viewer.setPerspectiveNear(0.1); viewer.setPerspectiveFar(10000);
Note that you can get and set properties for each projection at any time, regardless of which one is active.