In Match Photo – Part III before I drifted off talking about Scaling the model I had added a plane down the center from Right Side to Left Side. The intent is for this to act as a guide – bisecting the graphic. This will allow us to locate the near side of the Chimney.
Zoom into the upper section of the graphic so you have a clear view of the top of the chimney and the bisecting plane. This structure as I indicated has what was called the “Feeder Trough” at the very top. That’s the boxlike object the pipe is shown entering. Since this is centered on the chimney and since the bisecting plane bisects the center we can use this to locate the side of the chimney.
Select the Tape Measure Tool (T). Now, left click right on the vertical edge nearest the camera. Then move the mouse to the left. You will see a red line extending from that vertical edge – and a vertical black dashed line that follows the tip of the Tape Measure cursor. Move this back and forth until that dashed line divides the Feeder Trough exactly at the center – and left click.
Note: This is a very useful tool. Note that while you are moving the tool there is a Tool Tip that indicates how far you have moved from the vertical. It is repeated in the lower right of the screen under “Measurements”. If in a project you wanted to move that reference line (as that is what it is) a specific distance all you have to do is move it in the direction you want then simply enter directly on the keyboard the distance and hit enter. Simple as that the line will move there.