[sdlgit/SDL_perl.git] / test / OpenGL / tutorial / lesson04.sdlpl

#!/usr/bin/env perl
#
# lesson04.pl
#
# Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org>
#
# ------------------------------------------------------------------------------
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# ------------------------------------------------------------------------------
#
# Please feel free to send questions, suggestions or improvements to:
#
#	David J. Goehrig
#	dgoehrig@cpan.org
#

use strict;
use Getopt::Long;
use SDL;
use SDL::App;
use SDL::OpenGL;
use SDL::Event;

my $arg_screen_width =640;
my $arg_screen_height=512;
my $arg_fullscreen=0;
my $delay=30;

GetOptions(
	   "width:i"        => \$arg_screen_width,
	   "height:i"       => \$arg_screen_height,
	   "fullscreen!"    => \$arg_fullscreen,
	   "delay:i"	    => \$delay,
	  ) or die <<USAGE;
Usage $0 -w 800 -h 600 -d 10 --fullscreen 
USAGE

#/* rotation angle for the triangle. */
my $rtri = 0.0;

#/* rotation angle for the quadrilateral. */
my $rquad = 0.0;


main();
exit;


sub main
  {  
   my $done=0;
   my $app = new SDL::App ( -title => "Jeff Molofee's GL Code Tutorial ... NeHe '99", 
			    -icon => "icon.png",
			    -width => $arg_screen_width,
			    -height =>$arg_screen_height,
			    -gl => 1,
			  );
   $app->fullscreen() if $arg_fullscreen;
   
   SDL::ShowCursor(0);   
   
   my $event = new SDL::Event;
   $event->set(SDL_SYSWMEVENT,SDL_IGNORE);#
   

   InitGL($arg_screen_width, $arg_screen_height);

   while ( ! $done ) {

    DrawGLScene();

    $app->sync();
    $app->delay($delay);
   
    $event->pump;
    $event->poll;
    
    
    if ( $event->type == SDL_QUIT ) {
     $done = 1;
    }

    if ( $event->type == SDL_KEYDOWN ) {
     if ( $event->key_sym == SDLK_ESCAPE ) {
      $done = 1;
     }
    }
   }
  }


#########################################################################
#Pretty much in original form, but 'Perlised' 


sub InitGL
  {
   my ($Width, $Height)=@_;

   glViewport(0, 0, $Width, $Height);
   glClearColor(0.0, 0.0, 0.0, 0.0);				# This Will Clear The Background Color To Black
   glClearDepth(1.0);						# Enables Clearing Of The Depth Buffer
   glDepthFunc(GL_LESS);					# The Type Of Depth Test To Do
   glEnable(GL_DEPTH_TEST);					# Enables Depth Testing
   glShadeModel(GL_SMOOTH);					# Enables Smooth Color Shading
   
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();						# Reset The Projection Matrix
   
   gluPerspective(45.0, $Width/$Height, 0.1, 100.0);		# Calculate The Aspect Ratio Of The Window
   
   glMatrixMode(GL_MODELVIEW);
  }


# The main drawing function.
sub DrawGLScene
  {
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);		# Clear The Screen And The Depth Buffer
   glLoadIdentity();						# Reset The View
   
   glTranslate(-1.5,0.0,-6.0);		# Move Left 1.5 Units And Into The Screen 6.0
	
  glRotate($rtri,0.0,1.0,0.0);		# Rotate The Triangle On The Y axis 
  # draw a triangle (in smooth coloring mode)
  glBegin(GL_POLYGON);				# start drawing a polygon
  glColor(1.0,0.0,0.0);			# Set The Color To Red
  glVertex( 0.0, 1.0, 0.0);		# Top
  glColor(0.0,1.0,0.0);			# Set The Color To Green
  glVertex( 1.0,-1.0, 0.0);		# Bottom Right
  glColor(0.0,0.0,1.0);			# Set The Color To Blue
  glVertex(-1.0,-1.0, 0.0);		# Bottom Left	
  glEnd();					# we're done with the polygon (smooth color interpolation)

  glLoadIdentity();				# make sure we're no longer rotated.
  glTranslate(1.5,0.0,-6.0);		# Move Right 3 Units, and back into the screen 6.0
	
  glRotate($rquad,1.0,0.0,0.0);		# Rotate The Quad On The X axis 
  # draw a square (quadrilateral)
  glColor(0.5,0.5,1.0);			# set color to a blue shade.
  glBegin(GL_QUADS);				# start drawing a polygon (4 sided)
  glVertex(-1.0, 1.0, 0.0);		# Top Left
  glVertex( 1.0, 1.0, 0.0);		# Top Right
  glVertex( 1.0,-1.0, 0.0);		# Bottom Right
  glVertex(-1.0,-1.0, 0.0);		# Bottom Left	
  glEnd();					# done with the polygon

  $rtri+=15.0;					# Increase The Rotation Variable For The Triangle
  $rquad-=15.0;					# Decrease The Rotation Variable For The Quad 
 
   
  }
Commit	Line	Data
bfd90409	1	#!/usr/bin/env perl
	2	#
	3	# lesson04.pl
	4	#
	5	# Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org>
	6	#
	7	# ------------------------------------------------------------------------------
	8	#
	9	# This library is free software; you can redistribute it and/or
	10	# modify it under the terms of the GNU Lesser General Public
	11	# License as published by the Free Software Foundation; either
	12	# version 2.1 of the License, or (at your option) any later version.
	13	#
	14	# This library is distributed in the hope that it will be useful,
	15	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	# Lesser General Public License for more details.
	18	#
	19	# You should have received a copy of the GNU Lesser General Public
	20	# License along with this library; if not, write to the Free Software
	21	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	22	#
	23	# ------------------------------------------------------------------------------
	24	#
	25	# Please feel free to send questions, suggestions or improvements to:
	26	#
	27	# David J. Goehrig
	28	# dgoehrig@cpan.org
	29	#
	30
	31	use strict;
	32	use Getopt::Long;
	33	use SDL;
	34	use SDL::App;
	35	use SDL::OpenGL;
	36	use SDL::Event;
	37
	38	my $arg_screen_width =640;
	39	my $arg_screen_height=512;
	40	my $arg_fullscreen=0;
	41	my $delay=30;
	42
	43	GetOptions(
	44	"width:i" => \$arg_screen_width,
	45	"height:i" => \$arg_screen_height,
	46	"fullscreen!" => \$arg_fullscreen,
	47	"delay:i" => \$delay,
	48	) or die <<USAGE;
	49	Usage $0 -w 800 -h 600 -d 10 --fullscreen
	50	USAGE
	51
	52	#/* rotation angle for the triangle. */
	53	my $rtri = 0.0;
	54
	55	#/* rotation angle for the quadrilateral. */
	56	my $rquad = 0.0;
	57
	58
	59	main();
	60	exit;
	61
	62
	63	sub main
	64	{
65	my $done=0;
66	my $app = new SDL::App ( -title => "Jeff Molofee's GL Code Tutorial ... NeHe '99",
67	-icon => "icon.png",
68	-width => $arg_screen_width,
69	-height =>$arg_screen_height,
70	-gl => 1,
71	);
72	$app->fullscreen() if $arg_fullscreen;
73
74	SDL::ShowCursor(0);
75
76	my $event = new SDL::Event;
77	$event->set(SDL_SYSWMEVENT,SDL_IGNORE);#
78
79
80
81	InitGL($arg_screen_width, $arg_screen_height);
82
83	while ( ! $done ) {
84
85	DrawGLScene();
86
87	$app->sync();
88	$app->delay($delay);
89
90	$event->pump;
91	$event->poll;
92
93
94	if ( $event->type == SDL_QUIT ) {
95	$done = 1;
96	}
97
98	if ( $event->type == SDL_KEYDOWN ) {
99	if ( $event->key_sym == SDLK_ESCAPE ) {
100	$done = 1;
101	}
102	}
103	}
104	}
105
106
107
108
109
110
111	#########################################################################
112	#Pretty much in original form, but 'Perlised'
113
114
115
116
117
118	sub InitGL
119	{
120	my ($Width, $Height)=@_;
121
122	glViewport(0, 0, $Width, $Height);
123	glClearColor(0.0, 0.0, 0.0, 0.0); # This Will Clear The Background Color To Black
124	glClearDepth(1.0); # Enables Clearing Of The Depth Buffer
125	glDepthFunc(GL_LESS); # The Type Of Depth Test To Do
126	glEnable(GL_DEPTH_TEST); # Enables Depth Testing
127	glShadeModel(GL_SMOOTH); # Enables Smooth Color Shading
128
129	glMatrixMode(GL_PROJECTION);
130	glLoadIdentity(); # Reset The Projection Matrix
131
132	gluPerspective(45.0, $Width/$Height, 0.1, 100.0); # Calculate The Aspect Ratio Of The Window
133
134	glMatrixMode(GL_MODELVIEW);
135	}
136
137
138
139	# The main drawing function.
140	sub DrawGLScene
141	{
142	glClear(GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT); # Clear The Screen And The Depth Buffer
143	glLoadIdentity(); # Reset The View
144
145	glTranslate(-1.5,0.0,-6.0); # Move Left 1.5 Units And Into The Screen 6.0
146
147	glRotate($rtri,0.0,1.0,0.0); # Rotate The Triangle On The Y axis
148	# draw a triangle (in smooth coloring mode)
149	glBegin(GL_POLYGON); # start drawing a polygon
150	glColor(1.0,0.0,0.0); # Set The Color To Red
151	glVertex( 0.0, 1.0, 0.0); # Top
152	glColor(0.0,1.0,0.0); # Set The Color To Green
153	glVertex( 1.0,-1.0, 0.0); # Bottom Right
154	glColor(0.0,0.0,1.0); # Set The Color To Blue
155	glVertex(-1.0,-1.0, 0.0); # Bottom Left
156	glEnd(); # we're done with the polygon (smooth color interpolation)
157
158	glLoadIdentity(); # make sure we're no longer rotated.
159	glTranslate(1.5,0.0,-6.0); # Move Right 3 Units, and back into the screen 6.0
160
161	glRotate($rquad,1.0,0.0,0.0); # Rotate The Quad On The X axis
162	# draw a square (quadrilateral)
163	glColor(0.5,0.5,1.0); # set color to a blue shade.
164	glBegin(GL_QUADS); # start drawing a polygon (4 sided)
165	glVertex(-1.0, 1.0, 0.0); # Top Left
166	glVertex( 1.0, 1.0, 0.0); # Top Right
167	glVertex( 1.0,-1.0, 0.0); # Bottom Right
168	glVertex(-1.0,-1.0, 0.0); # Bottom Left
169	glEnd(); # done with the polygon
170
171	$rtri+=15.0; # Increase The Rotation Variable For The Triangle
172	$rquad-=15.0; # Decrease The Rotation Variable For The Quad
173
174
175	}
176
177
178
179