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1234 Chapter 15: Lights and Cameras
4.
Ifthedotisnotintherightposition,youcan
either click again with the mouse or adjust the
InputScreenCoordinatestotweakitsposition.
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.
Acameraiscreatedinthescenebasedon
the location of the CamPoint objects and the
specifications of the screen coordinates points.
Note: If the Current Camera Error reading is
greater than five, at least one of your screen
coordinate points is placed wrong. Check each
of them, and review the description follow ing
step 5. After reassigning the points, select t he
existing camera and click the Modify Camera
button to recalculate the camera position.
8. Press C to switch the Perspective view to that of
the new camera.
Inter face
CamPoint Info rollo ut
List window—Displays a list of the C a mPoint helper
objects in the scene. You select the CamPoint
objects from this list to assign screen coordinate
points.NotethatifyouselectaCamPointobjectin
the viewpor t, it‘s hi ghlighted in t his list as well.
Input S creen Coordina tes—
X/Y —
Fine-tunes the position of the screen
coordinate points in 2D space.
Use Th is Poi nt—Turns off a specific coordinate
point without deleting it. Select the corresponding
CamPoint in the list, and then tur n off Use
This Point. This feature is typic ally used for
troubleshooting when the Current Camera Error
is too high (greater than five, for example).
Assign Position—Click a location on the viewport
bitmap to place a screen coordinate point visually
against the background image. The point you
place corresponds to the currently selected
CamPoint object. After activating the Assign
P osition button, select a CamPoint object from the
list, and then click in the viewport at a position
on the bitmap background that corresponds with
wheretheassociateCamPointobjectshouldbein
the 3D scene. After repeating this process with
each CamPoint object in the list, you can click
theCreateCamerabuttontocreateacamera
that matches the placed coordinates with their
associate CamPoint objects.
Camera Match rollout