Initial import of libqt-perl (not yet TQt compatible)

1 files changed, 267 insertions, 0 deletions

diff --git a/PerlQt/examples/opengl/gear/gear b/PerlQt/examples/opengl/gear/gear
new file mode 100644
index 0000000..2edc951
--- /dev/null
+++ b/PerlQt/examples/opengl/gear/gear
@@ -0,0 +1,267 @@
+#!/usr/bin/perl -w
+#
+# Draws a gear.
+#
+# This code is originally from Qt-1.44, by Troll Tech
+#
+# Portions of this code have been borrowed from Brian Paul's Mesa
+# distribution.
+#
+
+package GearWidget;
+use OpenGL qw(:all);
+
+use Qt;
+use Qt::attributes qw(
+    gear1
+    gear2
+    gear3
+    view_rotx
+    view_roty
+    view_rotz
+    angle
+);
+
+use Qt::isa qw(Qt::GLWidget);
+
+#
+# Draw a gear wheel.  You'll probably want to call this function when
+# building a display list since we do a lot of trig here.
+#
+# Input:  inner_radius - radius of hole at center
+#         outer_radius - radius at center of teeth
+#         width - width of gear
+#         teeth - number of teeth
+#         tooth_depth - depth of tooth
+#
+
+sub gear {
+    my($inner_radius, $outer_radius, $width, $teeth, $tooth_depth) = @_;
+    my $i;
+    my($r0, $r1, $r2);
+    my($angle, $da);
+    my($u, $v, $len);
+
+    $r0 = $inner_radius;
+    $r1 = $outer_radius - $tooth_depth/2.0;
+    $r2 = $outer_radius + $tooth_depth/2.0;
+
+    my $pi = 3.141592654;
+    $da = 2.0*$pi / $teeth / 4.0;
+
+    glShadeModel(GL_FLAT);
+
+    glNormal3f(0.0, 0.0, 1.0);
+
+    # draw front face
+    glBegin(GL_QUAD_STRIP);
+    for $i (0 .. $teeth) {
+	$angle = $i * 2.0*$pi / $teeth;
+        glVertex3f($r0*cos($angle), $r0*sin($angle), $width*0.5);
+        glVertex3f($r1*cos($angle), $r1*sin($angle), $width*0.5);
+        glVertex3f($r0*cos($angle), $r0*sin($angle), $width*0.5);
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da), $width*0.5);
+    }
+    glEnd();
+
+    # draw front sides of teeth
+    glBegin(GL_QUADS);
+    $da = 2.0*$pi / $teeth / 4.0;
+    for $i (0 .. $teeth-1) {
+       $angle = $i * 2.0*$pi / $teeth;
+
+        glVertex3f($r1*cos($angle),       $r1*sin($angle),       $width*0.5);
+        glVertex3f($r2*cos($angle+$da),   $r2*sin($angle+$da),   $width*0.5);
+        glVertex3f($r2*cos($angle+2*$da), $r2*sin($angle+2*$da), $width*0.5);
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da), $width*0.5);
+    }
+    glEnd();
+
+
+    glNormal3f(0.0, 0.0, -1.0);
+
+    # draw back face
+    glBegin(GL_QUAD_STRIP);
+    for $i (0 .. $teeth) {
+        $angle = $i * 2.0*$pi / $teeth;
+        glVertex3f($r1*cos($angle), $r1*sin($angle), -$width*0.5);
+        glVertex3f($r0*cos($angle), $r0*sin($angle), -$width*0.5);
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da), -$width*0.5);
+        glVertex3f($r0*cos($angle), $r0*sin($angle), -$width*0.5);
+    }
+    glEnd();
+
+    # draw back sides of teeth
+    glBegin(GL_QUADS);
+    $da = 2.0*$pi / $teeth / 4.0;
+    for $i (0 .. $teeth-1) {
+        $angle = $i * 2.0*$pi / $teeth;
+
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da), -$width*0.5);
+        glVertex3f($r2*cos($angle+2*$da), $r2*sin($angle+2*$da), -$width*0.5);
+        glVertex3f($r2*cos($angle+$da),   $r2*sin($angle+$da),   -$width*0.5);
+        glVertex3f($r1*cos($angle),       $r1*sin($angle),       -$width*0.5);
+    }
+    glEnd();
+
+    # draw outward faces of teeth
+    glBegin(GL_QUAD_STRIP);
+    for $i (0 .. $teeth-1) {
+        $angle = $i * 2.0*$pi / $teeth;
+
+        glVertex3f($r1*cos($angle), $r1*sin($angle),  $width*0.5);
+        glVertex3f($r1*cos($angle), $r1*sin($angle), -$width*0.5);
+        $u = $r2*cos($angle+$da) - $r1*cos($angle);
+        $v = $r2*sin($angle+$da) - $r1*sin($angle);
+        $len = sqrt($u*$u + $v*$v);
+        $u /= $len;
+        $v /= $len;
+        glNormal3f($v, -$u, 0.0);
+        glVertex3f($r2*cos($angle+$da),   $r2*sin($angle+$da),    $width*0.5);
+        glVertex3f($r2*cos($angle+$da),   $r2*sin($angle+$da),   -$width*0.5);
+        glNormal3f(cos($angle), sin($angle), 0.0);
+        glVertex3f($r2*cos($angle+2*$da), $r2*sin($angle+2*$da),  $width*0.5);
+        glVertex3f($r2*cos($angle+2*$da), $r2*sin($angle+2*$da), -$width*0.5);
+        $u = $r1*cos($angle+3*$da) - $r2*cos($angle+2*$da);
+        $v = $r1*sin($angle+3*$da) - $r2*sin($angle+2*$da);
+        glNormal3f($v, -$u, 0.0);
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da),  $width*0.5);
+        glVertex3f($r1*cos($angle+3*$da), $r1*sin($angle+3*$da), -$width*0.5);
+        glNormal3f(cos($angle), sin($angle), 0.0);
+    }
+
+    glVertex3f($r1*cos(0.0), $r1*sin(0.0),  $width*0.5);
+    glVertex3f($r1*cos(0.0), $r1*sin(0.0), -$width*0.5);
+
+    glEnd();
+
+
+    glShadeModel(GL_SMOOTH);
+
+    # draw inside radius cylinder
+    glBegin(GL_QUAD_STRIP);
+    for $i (0 .. $teeth) {
+        $angle = $i * 2.0*$pi / $teeth;
+        glNormal3f(-cos($angle), -sin($angle), 0.0);
+        glVertex3f($r0*cos($angle), $r0*sin($angle), -$width*0.5);
+        glVertex3f($r0*cos($angle), $r0*sin($angle),  $width*0.5);
+    }
+    glEnd();
+}
+
+
+
+sub draw {
+    angle += 2.0;
+    view_roty += 1.0;
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+    glRotatef(view_rotx, 1.0, 0.0, 0.0);
+    glRotatef(view_roty, 0.0, 1.0, 0.0);
+    glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+    glPushMatrix();
+    glTranslatef(-3.0, -2.0, 0.0);
+    glRotatef(angle, 0.0, 0.0, 1.0);
+    glCallList(gear1);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef(3.1, -2.0, 0.0);
+    glRotatef(-2.0*angle-9.0, 0.0, 0.0, 1.0);
+    glCallList(gear2);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef(-3.1, 2.2, -1.8);
+    glRotatef(90.0, 1.0, 0.0, 0.0);
+    glRotatef(2.0*angle-2.0, 0.0, 0.0, 1.0);
+    glCallList(gear3);
+    glPopMatrix();
+
+    glPopMatrix();
+}
+
+sub NEW {
+    shift->SUPER::NEW(@_);
+    this->startTimer(10);
+    view_rotx = 20.0;
+    view_roty = 30.0; 
+    view_rotz = 0.0;
+    angle = 0.0;
+}
+
+sub initializeGL {
+    my $pos = [ 5.0, 5.0, 10.0, 1.0 ];
+    my $red = [ 0.8, 0.1, 0.0, 1.0 ];
+    my $green = [ 0.0, 0.8, 0.2, 1.0 ];
+    my $blue = [ 0.2, 0.2, 1.0, 1.0 ];
+
+    glLightfv_p(GL_LIGHT0, GL_POSITION, @$pos);
+    glEnable(GL_CULL_FACE);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+    glEnable(GL_DEPTH_TEST);
+
+    # make the gears
+    gear1 = glGenLists(1);
+    glNewList(gear1, GL_COMPILE);
+    glMaterialfv_p(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, @$red);
+    gear(1.0, 4.0, 1.0, 20, 0.7);
+    glEndList();
+
+    gear2 = glGenLists(1);
+    glNewList(gear2, GL_COMPILE);
+    glMaterialfv_p(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, @$green);
+    gear(0.5, 2.0, 2.0, 10, 0.7);
+    glEndList();
+
+    gear3 = glGenLists(1);
+    glNewList(gear3, GL_COMPILE);
+    glMaterialfv_p(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, @$blue);
+    gear(1.3, 2.0, 0.5, 10, 0.7);
+    glEndList();
+
+    glEnable(GL_NORMALIZE);
+}
+
+sub resizeGL {
+    my($width, $height) = @_;
+    my $w = $width / $height;
+    my $h = 1.0;
+
+    glViewport(0, 0, $width, $height);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glFrustum(-$w, $w, -$h, $h, 5.0, 60.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glTranslatef(0.0, 0.0, -40.0);
+}
+
+sub paintGL {
+    draw();
+}
+
+sub timerEvent {
+    updateGL();
+}
+
+package main;
+
+use Qt;
+use GearWidget;
+
+$app = Qt::Application(\@ARGV);
+
+if(!Qt::GLFormat::hasOpenGL()) {
+    warn("This system has no OpenGL support. Exiting.");
+    exit -1;
+}
+
+$w = GearWidget;
+$app->setMainWidget($w);
+$w->show;
+exit $app->exec;