Spherical Mapping; Spherical Mapping, Outside; Spherical Mapping, Inside; Modifier Parameter Adjustments - High End Systems DL.3 User Manual

CHAPTER 13
Effect Mode Options Descriptions

Spherical Mapping

Spherical Mapping adjusts a rectangular output to project on a portion of a sphere. It is
especially useful for projecting a collage onto a sphere or a portion of a sphere. Spherical
mapping utilizes a total of nine Effect Modifier parameters to adjust positioning. In addition to
the three modifiers associated with the Global Effect, two Graphics Object Effects provide six
additional Modifier parameters. Use these adjustments in conjunction with Keystone parameters
and Ratio parameters to refine the output shape on the spherical surface.
For a more detailed setup guide for Spherical Mapping, see "Mapping a Collage to a Spherical
Surface" on page 12-134.

Spherical Mapping, Outside

Effect Mode parameter DMX value = 142
This option corrects shape distortions and controls blending for collages projected onto the
outside surface of a sphere.

Spherical Mapping, Inside

Effect Mode parameter DMX value = 143
This Global Effect corrects shape distortions and controls blending for collages projected onto
the inside surface of a sphere.

Modifier Parameter Adjustments

When Spherical Mapping is selected, the associated Global Effect Modifier parameters adjust
Modifier 1: Adjusts the longitude (horizontal) angle. A value of 0 = no adjustment. The
number of degrees of angle increases as you increase value to maximum at 255
(100%).
Modifier 2: Adjusts the latitude (vertical) angle. A value of 0 = no adjustment. The num-
ber of degrees of angle increases as you increase value to maximum at 255 (100%).
Modifier 3: Adjusts the center of the latitude angle. A value of 128 = no adjustment and
assumes the center of the latitude angle is at the "equator". Values below the midpoint move
the center of the latitude angle down from the "equator" to a minimum at 0. Values above the
midpoint move the center of the latitude angle above the equator to a maximum at 255.
When the Spherical Mapping option is selected in a Global Effect parameter and a
Graphic Effect parameter's DMX value = 253, the Graphic Effect Modifier parameters
make the following Spherical Mapping adjustments:
Modifier 1: Controls the vertical offset of the projector. A value of 128 = no adjustment.
to maximum at 255 (100%). Values below the midpoint compress the grid toward the
"equator". Values above the midpoint stretch the horizontal grid lines away from the "equator".
Modifier 2: Adjusts the vertical offset of the sphere. A DMX value of 128 (50%) = no
adjustment. Adjusting toward 0 moves the center of the adjustment down toward the
bottom of the image.
the image at a DMX value of 255 (100%).
172
Values above the midrange move the bend center up to the top of
Object Effect Global Effect
DL.3 Digital Light User Manual