Colored Surface-- Display a surface view with colored voxels 6/21/95 PURPOSE: Display a shaded surface from a volume and color the voxels which appear on the surface according to colors specified in a second color volume. USAGE: Similar to the surface operation, except that the user is prompted for both the SPIDER volume to be surfaced and a second SPIDER volume which contains a color assignment for each voxel. Both volumes must have the same dimensions. Colors should be 0 --> 7. The more colors requested, the less the intensity range available within each color. For three colors about 58 intensities are available. Currently the opteration will load a default color assignment as follows: 0 = blue, 1 = green, 2 = red, 3 = yellow, 4 = cyan, 5 = magenta, 6 = white. The actual color can be changed by creating and loading a colormap having a intensity ramp for each of the desired colors. For example, with the following web output: Number of colors:3 Initial lut index: 64 Indices/color: 58; you should create a color-look-up-table having colors for specified indices as follows: 64 r0 g0 b0 | 65 r1 g1 b1 | . | ( intensity ramp for color zero) . | ( r*,g* & b* ar in range 0...255) 121 r58 g58 b58 | 122 r0 g0 b0 | 123 r1 g1 b1 | . | ( intensity ramp for color one) . | ( r,g, & b values are different 179 r58 g58 b58 | than above) 180 r0 g0 b0 | 181 r1 g1 b1 | . | ( intensity ramp for color two) . | 137 r58 g58 b58 | Load the color-ramp using the "LUT" operation under "OPTIONS" NOTE The operation can also accept a arbitrarily ranged color volume and will automatically partition the color range into the number of colors requested in the surface munu. However I do not recommend this method of use, as it may disappear in the future. NOTE: This operation is still under construction and may not work properly twice in the same WEB session. If you have problems please restart WEB.