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Catmull–Clark subdivision surface/Tcl Test Code: Difference between revisions
Catmull–Clark subdivision surface/Tcl Test Code (view source)
Revision as of 01:18, 18 January 2010
, 14 years ago→Utility Functions
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==Utility Functions==
<lang tcl>package require Tk
# A simple-minded ordering function for faces
proc orderf {points face1 face2} {
set d1 [set d2 0.0]
foreach p [selectFrom $points $face1] {
lassign $p x y z
foreach p [selectFrom $points $face2] {set d2 [expr {$d2 + [lindex $p 1]}]}▼
set d1 [expr {$d1 + sqrt($x*$x + $y*$y + $z*$z)}]
}
lassign $p x y z
set d2 [expr {$d2 + sqrt($x*$x + $y*$y + $z*$z)}]
}
expr {$d1<$d2 ? -1 : $d1>$d2 ? 1 : 0}
}
# Plots a net defined in points-and-faces fashion
proc visualizeNet {w points faces args} {
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set c {}
set polyCoords [selectFrom $points $face]
set sum {[list 0. 0. 0.]}
set centroid [centroid $polyCoords]
foreach coord $polyCoords {
lassign $coord x y z
lappend c \
[expr {
[expr {
}
lassign $centroid x y z
$w create polygon $c -fill {} {*}$args▼
set depth [expr {int(255*sqrt($x*$x + $y*$y + $z*$z) / sqrt(3.))}]
set grey [format #%02x%02x%02x $depth $depth $depth]
}
}</lang>
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