gleExtrusion

Extrude arbitrary 2D contour along arbitrary 3D path.

Signature

gleExtrusion( int( ncp ) , gleDouble[][2]( contour ) , gleDouble[][2]( cont_normal ) , gleDouble[3]( up ) , int( npoints ) , gleDouble[][3]( point_array ) , float[][3]( color_array ) )-> void
gleExtrusion( contour , cont_normal , up , point_array , color_array )
gleExtrusion( c_int(ncp), arrays.GLdoubleArray(contour), arrays.GLdoubleArray(cont_normal), arrays.GLdoubleArray(up), c_int(npoints), arrays.GLdoubleArray(point_array), arrays.GLfloatArray(color_array) ) -> None

Parameters

VariablesDescription
ncp
number of contour points
contour
2D contour
cont_normal
2D contour normals
up
up vector for contour
npoints
numpoints in poly-line
point_array
polyline vertices
color_array
colors at polyline verts

Description

Extrude arbitrary 2D contour along arbitrary 3D path. The argument contour specifies the 2D contour to be extruded, while the argument point_array specifies the path along which to extrude. The vector up defines the orientation of the contour y-axis in real 3D space.
Note that neither the very first segment, nor the very last segment are drawn. The first and last segments serve only to define the angle of the join at the very ends of the polyline. Thus, to draw one segment, three must be specified. To draw two segments, four must be specified, etc.
The normal array may be NULL . If it is, normal vectors will not be automatically generated, and the object will look terrible when lit.
The color array may be NULL . If NULL , the current color is used. If not NULL , the glColor3f routine is used to set the color; therefore, specifying the glColorMaterial subroutine before this primitive can be used to set diffuse, specular, ambient, etc. colors.

Author

Linas Vepstas

See Also

gleTwistExtrusion gleSuperExtrusion

Sample Code References

The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.

gleExtrusion
OpenGL-Demo PyOpenGL-Demo/GLE/texas.py Lines: 50, 51