proc Draw:toolkits { } {
set aResult [list TKDraw TKTopTest TKViewerTest TKXSDRAW TKDCAF TKXDEDRAW TKTObjDRAW TKQADraw]
- if { $::env(HAVE_VTK) == "true" } {
+ if { [info exists ::env(HAVE_VTK)] && $::env(HAVE_VTK) == "true" } {
lappend aResult "TKIVtkDraw"
}
TKNIS \
TKVoxel]
- if { "$::env(HAVE_VTK)" == "true" } {
+ if { [info exists ::env(HAVE_VTK)] && "$::env(HAVE_VTK)" == "true" } {
lappend aResult "TKIVtk"
}
proc Visualization:acdepends { } {
set aList [list X11 GL FREETYPE]
- if { "$::env(HAVE_VTK)" == "true" } {
+ if { [info exists ::env(HAVE_VTK)] && "$::env(HAVE_VTK)" == "true" } {
lappend aList "VTK"
}