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)