| placing polylines/polygons exactly on a surface? [message #47168] |
Fri, 27 January 2006 00:50 |
Weihua FANG
Messages: 26
Registered: January 2006
|
Junior Member |
|
|
Hi, all
A 3D visualization of roads is to be created with 3 types of data:
a) elevation data: elev(m,m): a 2 dimensional array
b) a satellite image for texture: image_sate (m, m): a 2-dimensional
array
c) road lines, road_vertex (3, n, n): a 3-by-n floating-point array
representing a 3-D vertex
I did it by the following steps:
1) created an IDLgrSurface Object and set DATAZ property to elevation
array
2) set the texture of the surface to the satellite image array
things worked fine till now.
3) created an IDLgrPolyline Object and set the DATA property to
road_vertex.
the road line is not exactly on the surface. Some parts of the line
are over and the rest are inner the surface.
I am wondering, how to place polylines or polygons exactly on a
surface? I found IDLgrContour object can display contours on a surface
quite well though.
Can someone please give me some hints?
Thanks a lot.
Fang
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
