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RT MATERIAL TYPE, PROPERTIES, and COLOR

First the solids must be formed into a "region", eg:

r ball u torus u tube-hole

To change material type, properties and color use the "mater" command:

mged> mater base
Material =
Material? (CR to skip) plastic
Param =
Parameter string? (CR to skip) sh=10 dl=0.2 sp=0.8 re=0.75
Color = (No color specified)
Color R G B (0..255)? (CR to skip) 112 219 147
Inherit = 0: lower nodes (towards leaves) override
Inheritance (0|1)? (CR to skip) 0
mged>

For the values in Parameter String for material ``Plastic'', you can enter such things as: "shinyness (sh)", "specular lighting fraction (sp)", "diffuse lighting fraction (di)", "transmission fraction (tr)", "reflection fraction (re)", and "refractive index (ri)". Two formulas must hold to keep the material ``physical'': sp + di=1.0, and tr + re=1.0.

Suggested values for these properties are listed below:

sh=10, dl=0.2, sp=0.8, re=0.75

NOTE: Not all of these fields need to be input, you can use the system defaults for the rest.

To display objects in different colors on the screen, each object must be a region with its own material properties and colors. All regions must be displayed on screen before a ray tracing can be performed (region objects can have cutouts to display other parts).

R      G       B        COLOR

112    219     147       aquamarine
50     204     153       med aquamarine
0        0       0       black 
0        0     255       blue 
95     159     159       cadet blue 
66      66     111       corn flower blue
107     35     142       dk slate blue 
191    216     216       light blue 
143    143     188       light steel blue
50      50     204       medium blue 
127      0     255       medium slate blue
47      47      79       midnight blue 
35      35     142       navy blue 
50     153     204       sky blue 
0      127     255       slate blue 
35     107     142       steel blue 
255    127       0       coral 
0      255     255       cyan 
142     35      35       firebrick 
204    127      50       gold 
219    219     112       golden rod 
234    234     173       med goldenrod 
0      255       0       green 
47      79      47       dark green 
79      79      47       dk olive green 
35     142      35       forest green 
50     204      50       lime green 
107    142      35       med forest green
66     111      66       medium sea green
127    255       0       med spring green
143    188     143       pale green 
35     142     107       sea green
0      255     127       spring green
153    204      50       yellow green
47      79      79       dk slate grey
84      84      84       dim grey
168    168     168       light grey


 R      G       B          COLOR

159    159      95       khaki 
255      0     255       magenta
142     35     107       maroon
204     50      50       orange
219    112     219       orchid
153     50     204       dark orchid
147    112     219       medium orchid
188    143     143       pink
234    173     234       plum
255      0       0       red
79      47      47       indian red
219    112     147       medium violet
255      0     127       orange red
204     50     153       violet red
111     66      66       salmon
142    107      35       sienna
219    147     112       tan
216    191     216       thistle
173    234     234       turquoise
112    147     219       dk turquoise
112    219     219       med turquoise
79      47      79       violet
159     95     159       blue violet
216    216     191       wheat
252    252     252       white
255    255       0       yellow
147    219     112       green yellow

material types are: plastic mirror glass texture

Shinyness (ie: sh=16)

Refractive index for: crown glass = 1.52 Flint glass = 1.65 Rock salt = 1.54 Water = 1.33 Diamond = 2.42

Transmission fraction for a mirror: re=1.0 (tr=0)



Wed Feb 16 13:46:53 EST 1994