From 0d406ebf18a0fefdbc7df031d3df106b8d204d64 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Mon, 24 Mar 2003 12:24:56 +0000
Subject: Portage depuis perl

---
 demos/fillRule.tcl | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 demos/fillRule.tcl

(limited to 'demos/fillRule.tcl')

diff --git a/demos/fillRule.tcl b/demos/fillRule.tcl
new file mode 100644
index 0000000..83c3b94
--- /dev/null
+++ b/demos/fillRule.tcl
@@ -0,0 +1,97 @@
+# these simple samples have been developped by C. Mertz mertz@cena.fr in perl
+# tcl version by Jean-Paul Imbert imbert@cena.fr
+
+if {![info exists zincDemo]} {
+    error "This script should be run from the zinc-widget demo."
+}
+
+set w .fillrule
+catch {destroy $w}
+toplevel $w
+wm title $w "Zinc Fillrule Demonstration"
+wm iconname $w "Fillrule"
+
+set defaultfont "-adobe-helvetica-bold-r-normal-*-120-*-*-*-*-*-*"
+
+frame $w.buttons
+pack $w.buttons -side bottom -fill x -pady 2m
+button $w.buttons.dismiss -text Dismiss -command "destroy $w"
+button $w.buttons.code -text "See Code" -command "showCode $w"
+pack $w.buttons.dismiss $w.buttons.code -side left -expand 1
+
+
+####### This file has been largely inspired from figure 11-3
+####### of "The OpenGL Programming Guide 3rd Edition The 
+####### Official Guide to Learning OpenGL Version 1.2" ISBN 0201604582
+
+####### it illustrates the use of :
+#######  -fillrule attribute of curves
+#######  contour coords and clone method
+
+zinc $w.zinc -width 550 -height 630 -font 10x20 -borderwidth 0 -backcolor white
+pack $w.zinc
+
+
+$w.zinc add text 1 -position {20 8} -text {This still static example reproduces figure 11-3
+     of "The OpenGL Programming Guide 3rd Edition" V 1.2}
+
+set group [$w.zinc add group 1]
+
+set g1 [$w.zinc add group $group]
+set curve1 [$w.zinc add curve $g1 {}]
+$w.zinc contour $curve1 add +1 { 0 0 0 120 120 120 120 0 0 0}
+$w.zinc contour $curve1 add +1 { 20 20 20 100 100 100 100 20 20 20}
+$w.zinc contour $curve1 add +1 { 40 40 40 80 80 80 80 40 40 40}
+$w.zinc translate $g1 40 40
+
+
+set g2 [$w.zinc add group $group]
+set curve2 [$w.zinc add curve $g2 {}]
+$w.zinc contour $curve2 add +1 { 0 0 0 120 120 120 120 0 0 0}
+$w.zinc contour $curve2 add -1 { 20 20 20 100 100 100 100 20 20 20}
+$w.zinc contour $curve2 add -1 { 40 40 40 80 80 80 80 40 40 40}
+$w.zinc translate $g2 200 40
+
+
+set g3 [$w.zinc add group $group]
+set curve3 [$w.zinc add curve $g3 {}]
+$w.zinc contour $curve3 add +1 { 20 0 20 120 100 120 100 0 20 0}
+$w.zinc contour $curve3 add +1 { 40 20 60 120 80 20 40 20}
+$w.zinc contour $curve3 add +1 { 0 60 0 80 120 80 120 60 0 60}
+$w.zinc translate $g3 360 40
+
+set g4 [$w.zinc add group $group]
+set curve4 [$w.zinc add curve $g4 {}]
+$w.zinc contour $curve4 add +1 { 0 0 0 140 140 140 140 60 60 60 60 80 80 80 80 40 40 40 40 100 100 100 100 20 20 20 20 120 120 120 120 0 0 0}
+$w.zinc translate $g4 520 40
+
+$w.zinc scale $group 0.6 0.6
+$w.zinc translate $group 80 20
+
+$w.zinc add text $group -position {-110 40} -text "contours\nand\nwinding\nnumbers"
+$w.zinc add text $group -position {-110 170} -text "winding\nrules"
+set dy 0
+foreach fillrule {odd nonzero positive negative abs_geq_2} {
+    set dy [expr $dy + 160]
+    $w.zinc add text $group -position "-110 [expr 100+$dy]" -text $fillrule
+    foreach item "$curve1 $curve2 $curve3 $curve4" {
+	set clone [$w.zinc clone $item -fillrule $fillrule -filled 1]
+	$w.zinc translate $clone 0 $dy
+    }
+}
+
+# creating simple lines with arrows under each curves
+foreach item "$curve1 $curve2 $curve3 $curve4" {
+    set contour_number [$w.zinc contour $item]
+    #puts "$item contour_number=$contour_number\n"
+    for {set n 0} {$n <=[expr $contour_number-1]} {incr n} {
+	set points [$w.zinc coords $item $n]
+	set nbpoints [llength $points]
+	for {set i 0} {$i <=[expr $nbpoints-2]} {incr i} {
+	    set firstpoint [lindex $points $i]
+	    set lastpoint [lindex $points [expr $i+1]]
+	    set middlepoint "[expr [lindex $firstpoint 0]+([lindex $lastpoint 0]- [lindex $firstpoint 0])/1.5] [expr [lindex $firstpoint 1]+([lindex $lastpoint 1]-[lindex $firstpoint 1])/1.5]"
+	    $w.zinc add curve [$w.zinc group $item] "$firstpoint $middlepoint" -lastend "7 10 4"
+	}
+    }
+}
-- 
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