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Diffstat (limited to 'Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl')
| -rw-r--r-- | Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl b/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl deleted file mode 100644 index bc59863..0000000 --- a/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl +++ /dev/null @@ -1,221 +0,0 @@ -#!/usr/bin/perl -w -# $Id$ -# This simple demo has been developped by C. Mertz <mertz@cena.fr> - -####### This file has been initially inspired from svg examples - -package curveBezier; - -use vars qw( $VERSION ); -($VERSION) = sprintf("%d.%02d", q$Revision$ =~ /(\d+)\.(\d+)/); - -use Tk::Zinc; - - -my $mw = MainWindow->new(); -$mw->title('example of curves with cubic control points'); - -my $text = $mw->Text (-relief => 'sunken', -borderwidth => 2, - -setgrid => 'true', -height =>3); -$text->pack(qw/-expand yes -fill both/); - -$text->insert('0.0', -'6 examples of curves containing control points are displayed, - with the list of control points written just below. -You can move the handles to modify the bezier curves'); - - -my $zinc = $mw->Zinc(-width => 700, -height => 650, - -font => "10x20", - -font => "9x15", - -borderwidth => 0, - -backcolor => "white", - -forecolor => "grey80", - -render => 1, # this demo also works without openGL - # with openGL, antialiasing makes the curves nicer - )->pack; - -my $group = $zinc->add('group', 1); - -$zinc->add('text',$group, -position => [50,20], -anchor => 'w', - -text => "Examples of curve items using cubic bezier control points", - -color => "grey20"); - -## Please note: much of the following items below could be computed -$zinc->add('text',$group, -position => [25,270], -anchor => 'w', -tags => ['bezier1'], -color => "grey20"); -$zinc->add('curve',$group,[100, 200, 100, 100], -tags => ['line1', 'l1-2'], -linecolor => "#888888", -filled => 0, -linewidth => 2); -$zinc->add('curve',$group,[400, 100, 400, 200], -tags => ['line1', 'l3-4'], -linecolor => "#888888", -filled => 0, -linewidth => 2); -$zinc->add('curve',$group,[[100, 200], [100, 100, 'c'], [400, 100, 'c'], [400, 200]], - -tags => ['bezier1'], -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[90, 190, 110, 210], -tags => ['handle1',"p1"], -filled => 1, -fillcolor => "#BBBBBB"); -$zinc->add('arc',$group,[90, 90, 110, 110], -tags => ['handle1',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1); -$zinc->add('arc',$group,[390, 90, 410, 110], -tags => ['handle1',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1); -$zinc->add('arc',$group,[390, 190, 410, 210], -tags => ['handle1',"p4"], -filled => 1, -fillcolor => "#BBBBBB"); - -$zinc->add('text',$group, -position => [570,270], -anchor => 'w', -tags => ['bezier2'], -color => "grey20"); -$zinc->add('curve',$group,[600, 200, 675, 100], -tags => ['line2', 'l1-2'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[975, 100, 900, 200], -tags => ['line2', 'l3-4'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[[600, 200], [675, 100, 'c'], [975, 100, 'c'], [900, 200]], - -tags => ['bezier2'], -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[590, 190, 610, 210], -tags => ['handle2',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2); -$zinc->add('arc',$group,[665, 90, 685, 110], -tags => ['handle2',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[965, 90, 985, 110], -tags => ['handle2',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[890, 190, 910, 210], -tags => ['handle2',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2); - -$zinc->add('text',$group, -position => [25,570], -anchor => 'w', -tags => ['bezier3'], -color => "grey20"); -$zinc->add('curve',$group,[100, 500, 25, 400], -tags => ['line3', 'l1-2'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[475, 400, 400, 500], -tags => ['line3', 'l3-4'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[[100, 500], [25, 400, 'c'], [475, 400, 'c'], [400, 500]], - -tags => ['bezier3'], -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[90, 490, 110, 510], -tags => ['handle3',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2); -$zinc->add('arc',$group,[15, 390, 35, 410], -tags => ['handle3',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", ); -$zinc->add('arc',$group,[465, 390, 485, 410], -tags => ['handle3',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", ); -$zinc->add('arc',$group,[390, 490, 410, 510], -tags => ['handle3',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2); - -$zinc->add('text',$group, -position => [570,570], -anchor => 'w', -tags => ['bezier4'], -color => "grey20"); -$zinc->add('curve',$group,[600, 500, 600, 350], -tags => ['line4', 'l1-2'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[900, 650, 900, 500], -tags => ['line4', 'l3-4'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[[600, 500], [600, 350, 'c'], [900, 650, 'c'], [900, 500]], -tags => ['bezier4'], -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[590, 490, 610, 510], -tags => ['handle4',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2); -$zinc->add('arc',$group,[590, 340, 610, 360], -tags => ['handle4',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[890, 640, 910, 660], -tags => ['handle4',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[890, 490, 910, 510], -tags => ['handle4',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2); - -$zinc->add('text',$group, -position => [25,870], -anchor => 'w', -tags => ['bezier5'], -color => "grey20"); -$zinc->add('curve',$group,[100, 800, 175, 700], -tags => ['line5', 'l1-2'], -linecolor => "#888888", -filled => 0, -linewidth => 2); -$zinc->add('curve',$group,[325, 700, 400, 800], -tags => ['line5', 'l3-4'], -linecolor => "#888888", -filled => 0, -linewidth => 2); -$zinc->add('curve',$group,[[100, 800], [175, 700, 'c'], [325, 700, 'c'], [400, 800]], - -tags => ['bezier5'], -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[90, 790, 110, 810], -tags => ['handle5',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2); -$zinc->add('arc',$group,[165, 690, 185, 710], -tags => ['handle5',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1); -$zinc->add('arc',$group,[315, 690, 335, 710], -tags => ['handle5',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1); -$zinc->add('arc',$group,[390, 790, 410, 810], -tags => ['handle5',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2); - -$zinc->add('text',$group, -position => [570,980], -anchor => 'w', -tags => ['bezier6'], -color => "grey20"); -$zinc->add('curve',$group,[600, 800, 625, 700], -tags => ['line6', 'l1-2'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[725, 700, 750, 800], -tags => ['line6', 'l3-4'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[750, 800, 775, 900], -tags => ['line6', 'l4-5'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[875, 900, 900, 800], -tags => ['line6', 'l6-7'], -linecolor => "#888888", -linewidth => 2); -$zinc->add('curve',$group,[[600, 800], [625, 700, 'c'], [725, 700, 'c'], [750, 800], [775, 900, 'c'], [875, 900, 'c'], [900, 800]], - -tags => ['bezier6'], -filled => 0, -closed => 0, -linecolor => "red", -linewidth => 5); -$zinc->add('arc',$group,[590, 790, 610, 810], -tags => ['handle6',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2); -$zinc->add('arc',$group,[615, 690, 635, 710], -tags => ['handle6',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[715, 690, 735, 710], -tags => ['handle6',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[740, 790, 760, 810], -tags => ['handle6',"p4"], -filled => 1, -linecolor => "blue",-fillcolor => "blue", -linewidth => 2); -$zinc->add('arc',$group,[766, 891, 784, 909], -tags => ['handle6',"p5"], -filled => 1, -linecolor => "grey80", -linewidth => 4); -$zinc->add('arc',$group,[865, 890, 885, 910], -tags => ['handle6',"p6"], -filled => 1, -linewidth => 0, -fillcolor => "grey80"); -$zinc->add('arc',$group,[890, 790, 910, 810], -tags => ['handle6',"p7"], -filled => 1, -linecolor => "grey80", -linewidth => 2); - -$zinc->scale($group, 0.6, 0.6); - -## Set the text of the text item with a tag "tag" -## to a human-readable form of the coords of the -## corresponding curve with the same tag "tag" -sub setText { - my ($tag) = @_; - my $textItem = $zinc->find("withtype", 'text', $tag); - my $curveItem = $zinc->find("withtype", 'curve', $tag); - my @coords = $zinc->coords($curveItem); - my $count = 0; - my $text = "[ "; - while (@coords) { - $refXYc = pop @coords; - my $x=sprintf "%i", $refXYc->[0]; - my $y=sprintf "%i", $refXYc->[1]; - my $t=$refXYc->[2]; - $t = (defined $t) ? ", '".$t."'" : "" ; - $text .= "[$x, $y$t]"; - if (@coords) { $text .= ", "; } - if ($count and @coords) { - $text .= "\n "; - $count =0; - } else { - $count++; - } - } - $text .= " ]"; - $zinc->itemconfigure($textItem, -text => $text); -} - -foreach my $bezierCount (1..6) { - &setText ("bezier".$bezierCount); - my $curveItem = $zinc->find("withtype", 'curve', "bezier".$bezierCount); - my @coords = $zinc->coords($curveItem); -# print "$bezierCount : ", scalar @coords, "\n"; - $zinc->bind("handle$bezierCount", '<ButtonPress-1>', [\&press, \&motion]); - $zinc->bind("handle$bezierCount", '<ButtonRelease-1>', [\&release]); -} - - - -&Tk::MainLoop; - - -##### bindings for moving the handles -my ($cur_x, $cur_y,$item, $bezierNum, $ptNum); -sub press { - my ($zinc, $action) = @_; - my $ev = $zinc->XEvent(); - $cur_x = $ev->x; - $cur_y = $ev->y; - $item = $zinc->find('withtag', 'current'); - $zinc->bind($item, '<Motion>', [$action]); - foreach ( $zinc->gettags($item) ) { - ## looking for the tag "handlei" - if ( /^handle(\d+)$/ ) { - $bezierNum = $1; - } - ## looking for the tag "pj" - if ( /^p(\d+)$/ ) { - $ptNum = $1; - } - } -# print "bezierNum=$bezierNum ptNum=$ptNum\n"; -} - -sub motion { - my ($zinc) = @_; - my $ev = $zinc->XEvent(); - my $lx = $ev->x; - my $ly = $ev->y; - my ($dx,$dy) = $zinc->transform($group, [$lx-$cur_x, $ly-$cur_y]); - &moveHandle($item,$dx,$dy); - my ($pt1,$pt2) = $zinc->coords($item); -# print "coords=",@{$pt1}, " ",@{$pt2},"\n"; - $cur_x = $lx; - $cur_y = $ly; -} - -sub release { - my ($zinc) = @_; - $zinc->bind($item,'<Motion>', ''); - $item = ""; -} - -sub moveHandle { - my ($item,$dx,$dy) = @_; - my ($pt1,$pt2) = $zinc->coords($item); - ## modifying the handle coords - $zinc->coords($item, [ $pt1->[0]+$dx, $pt1->[1]+$dy, $pt2->[0]+$dx, $pt2->[1]+$dy]); - my $prevPtNum = $ptNum-1; - # there should only be one such item! - my $lineA = $zinc->find("withtag", "line$bezierNum && l$prevPtNum-$ptNum"); - if (defined $lineA) { - my ($x,$y) = $zinc->coords($lineA,0,1); # to get the 2nd point coords - $zinc->coords($lineA, 0,1, [ $x+$dx, $y+$dy ]); - } - - my $nextPtNum = $ptNum+1; - # there should only be one such item: - my ($lineB) = $zinc->find("withtag", "line$bezierNum && l$ptNum-$nextPtNum"); - if (defined $lineB) { - my ($x,$y) = $zinc->coords($lineB,0,0); # to get the 1st point coords - $zinc->coords($lineB, 0,0, [ $x+$dx, $y+$dy ] ); - } - - my ($x,$y,$control) = $zinc->coords("bezier$bezierNum", 0,$ptNum-1); - $zinc->coords("bezier$bezierNum", 0,$ptNum-1, [ [$x+$dx, $y+$dy, $control] ] ); - &setText ("bezier$bezierNum"); - -} - |