File: simple.pl

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libopengl-perl 0.7004%2Bdfsg-1
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# simple example taken from listing 1-1 (or 1-2) from OpenGL book

use OpenGL;

glpOpenWindow;
glClearColor(0,0,1,1);
glClear(GL_COLOR_BUFFER_BIT);
glOrtho(-1,1,-1,1,-1,1);

glColor3f(1,0,0);
glBegin(GL_POLYGON);
  glVertex2f(-0.5,-0.5);
  glVertex2f(-0.5, 0.5);
  glVertex2f( 0.5, 0.5);
  glVertex2f( 0.5,-0.5);
glEnd();
glpFlush();

print "Program 1-1 Simple, hit Enter in terminal window to quit:\n\n";
glpMainLoop;