High End Systems DL.2 user manual Spherical Mapping, Outside, Spherical Mapping, Inside, 172

CHAPTER 13

Effect Mode Options Descriptions

Spherical Mapping

Object Effect Global Effect

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 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. Values above the midrange move the bend center up to the top of the image at a DMX value of 255 (100%).

172 DL.2 Digital Light User Manual