#!/usr/bin/perl
use warnings;
use strict;
use PDL::LiteF;
use PDL::Graphics::TriD;
use PDL::Graphics::TriD::GL;
use PDL::Graphics::OpenGL;

# hit 'q' repeatedly to cycle thru the script

package TOBJ;
BEGIN{@TOBJ::ISA = qw/PDL::Graphics::TriD::Object/;}
use PDL::Graphics::OpenGLQ;
use PDL::Graphics::OpenGL;

my $self;

sub new {
 my ($pkg, $lb, $text, $pos) = @_;
# print "@_\n"; 
 
 $self = bless {
      "lb"   => $lb,
      "text"  => $text,
      "x" => $pos->[0],
      "y" => $pos->[1],
      "z" => $pos->[2],
   }, $pkg;
 
 return $self;
}

sub togl {
#        print "togl @_\n";
        glDisable(&GL_LIGHTING);
	glColor3f(1,0,1);
	glRasterPos3f($self->{'x'},$self->{'y'},$self->{'z'});
	PDL::Graphics::OpenGL::glpPrintString($self->{'lb'}, $self->{'text'});
	glEnable(&GL_LIGHTING);
}

sub ctext{
   print "ctext @_\n";
   $self->{'text'} = $_[1];
   
   if( $_[2] ){ 
   my $pos = $_[2]; 
   $self->{'x'} = $pos->[0],
   $self->{'y'} = $pos->[1],
   $self->{'z'} = $pos->[2],
   
    }

}

1;

#######################################################
package main;

# little piddle to add some color
my $pdlc = zeroes(3); #each elem has 3 elements
my $col = $pdlc->slice('1:1,:,:'); #green
#$col = $pdlc->slice('0:0,:,:'); #red
$col += 1;

#get GL window to pass to text object
my $win = PDL::Graphics::TriD::get_current_window();
my $vp = $win->current_viewport;
my $lb = $win->glpRasterFont("10x20",0,255);
# glShadeModel (&GL_FLAT);
glShadeModel (&GL_SMOOTH);


my $tobj = new TOBJ($lb,'points3d SURF2D', [0,0,0]);
$win->add_object($tobj);
hold3d();  #objects built up to this point will be held

my $nx = 20;
my $t =  (xvals zeroes $nx+1,$nx+1)/$nx;
my $u =  (yvals zeroes $nx+1,$nx+1)/$nx;
my $x = sin($u*15 + $t * 3)/2+0.5 + 5*($t-0.5)**2;
points3d(['SURF2D',$x],$pdlc);

$vp->setview([3,3,3]);
$tobj->ctext('line3d SURF2D',[0,0,0]);
line3d(['SURF2D',$x],$pdlc);


$vp->setview([3,-3,3]);
$tobj->ctext('mesh3d',[0,0,.75]);
mesh3d([$x]);

$vp->setview([3,-3,-3]);
$tobj->ctext('imag3d Lines=>0',[1,1,1]);
imag3d([$x],{Lines => 0});

$vp->setview([-3,-3,-3]);
$tobj->ctext('imag3d Lines => 0, Smooth => 1',[.75,.75,.75]);
imag3d([$x],{Lines => 0, Smooth => 1});

$vp->setview([0,0,3]);
$tobj->ctext('imag3d',[0,0,.5]);
imag3d_ns([$x]);