Editing One Point Perspective in SketchUp (section)

== Process ==

'''Camera''' > '''Two-Point Perspective'''

Making sure that any planes that should be perpendicular to the central view point (CVP) are positioned accordingly.

With the camera pointing perpendicular to a plane, the top, bottom, and sides of the plane will form lines that are parallel to the edges of the viewport. 

The next task is to make sure that the camera is centered relative to the center of the scene.

With the [https://extensions.sketchup.com/en/content/advanced-camera-tools Advanced Camera Tools] (ACT) SketchUp extension installed, create a camera to save and manipulate the view onto the scene. 

* '''Tools''' > '''Advanced Camera Tools''' > '''Create Camera'''
* Name the camera, e.g. "1PP"

Note that after the camera is created, a scene is created for the camera which can then be accessed either through the Scene tabs at the top of the project window or through the Scenes palette ('''Window''' > '''Scenes''').

'''Be careful''' not to use the Orbit tool immediately after using the camera unless the objective is the adjust the save view onto the scene. I.e. if you want to look at something to edit its geometry, it's necessary to first make sure that the camera is no longer selected. I'm not 100% clear on the most efficient, "correct" way to do this, but even if it looks like the camera isn't selected in the Outliner window, click in the Outliner window off any object in the list. Then adjustments applied with the Orbit tool won't change the position of the camera.

SketchUp shows a "active" camera (e.g. one that will be manipulated through the use of the Orbit tool) when there is a small crosshairs icon visible in the scene where the camera is pointed.