2009

TIP To use the keyboard, first click in the X field, enter its value, and then
press Tab to move to the next field and enter its value. Continue this until
you tab to the Create button, and then press Enter to create the CamPoint,
followed by Tab to move back to the X field, where you can start again. You
can create all the CamPoint objects with default names, and then use the
Select By Name floater (Tools > Selection Floater) to select and rename the
six pointers.
7 Repeat the above steps for the remaining CamPoint objects.
NOTE An alternative method is to create the CamPoint objects anywhere in
the scene, and then reselect each of them and enter their absolute coordinates
using the Transform Type-In.
You now have the CamPoint objects occupying real-world coordinate positions
that correspond to the structure in the bitmap image. The last sequence of
steps involves using the Camera Match utility to specify the screen coordinate
points, one for each CamPoint object, and generating a camera position based
on the data.
To use the Camera Match utility:
1 On the Utilities panel, click the Camera Match button.
The Camera Match utility appears, listing the CamPoint objects.
2 Select the first CamPoint object and click the Assign Position button.
3 Place the cursor over the corresponding feature in the bitmap and click.
A small, red cross appears.
4 If the dot is not in the right position, you can either click again with the
mouse or adjust the Input Screen Coordinates to tweak its position.
5 Select the second object in the list, and repeat steps 3 and 4.
6 Repeat for all the points. By setting the red crosses, you’ve indicated the
X and Y pixel position on the bitmap and correlated it with each
CamPoint as it exists in 3D space.
7 Once you have all of the points set, click the Create Camera button.
A camera is created in the scene based on the location of the CamPoint
objects and the specifications of the screen coordinates points.
5252 | Chapter 18 Lights and Cameras