VRML : Chemistry in VRML
Source code for example 10 : A H2O (water) molecule.
Lone electron pair are not shown.
#VRML V1.0 ascii
Separator {
#Create the lights, camera and material as usuall
DirectionalLight { direction 0 0 -1 }
DirectionalLight { direction 0 -1 0 }
PerspectiveCamera {
position 4 2 8
orientation 0 1 0 0.4
}
Material {
diffuseColor 1 0 0
ambientColor 0.2 0 0
}
#Create a red O atom at (0,0,0)
Sphere { radius 1.3 }
#Create new material for H atoms
Material {
diffuseColor 1 1 1
ambientColor 0.2 0.2 0.2
}
#Create the first H atom at (4,0,0)
Separator {
Translation { translation 4 0 0 }
Sphere { radius 0.7 }
}
#This time rotate around z axis by 104.5 degrees,
#move out 4 units, and create second H atom
Separator {
Rotation { rotation 0 0 1 1.823869 }
Translation { translation 4 0 0 }
Sphere { radius 0.7 }
}
#Create new material for bonds
Material {
diffuseColor 0 0 1
ambientColor 0 0 0.2
}
#Move to (2,0,0), rotate 90 degrees around the z
#axis, and create a cylinder, representing the
#bond between one of the H atoms and the O atom
Separator {
Translation { translation 2 0 0 }
Rotation { rotation 0 0 1 1.570796 }
Cylinder {
height 4
radius 0.3
parts SIDES
}
}
#Create the second bond, which is a little more
#complicated, but uses the same general method,
#and one additional rotation
Separator {
Rotation { rotation 0 0 1 1.823869 }
Translation { translation 2 0 0 }
Rotation { rotation 0 0 1 1.570796 }
Cylinder {
height 4
radius 0.3
parts SIDES
}
}
}
#End of file
Previous Topic (Chemistry in VRML)
Back to the VRML Reference
Back to the Main Page
©Tom Thurston, 1997
Please feel free to use and redistribute this NONcommercially!