How to resolve the algorithm OpenGL step by step in the Perl programming language

Published on 12 May 2024 09:40 PM
#Perl

How to resolve the algorithm OpenGL step by step in the Perl programming language

Table of Contents

Problem Statement

Display a smooth shaded triangle with OpenGL.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm OpenGL step by step in the Perl programming language

Source code in the perl programming language

use OpenGL;

sub triangle {
    glBegin GL_TRIANGLES;
    glColor3f 1.0, 0.0, 0.0;
    glVertex2f 5.0, 5.0;
    glColor3f 0.0, 1.0, 0.0;
    glVertex2f 25.0, 5.0;
    glColor3f 0.0, 0.0, 1.0;
    glVertex2f 5.0, 25.0;
    glEnd;
};

glpOpenWindow;
glMatrixMode GL_PROJECTION;
glLoadIdentity;
gluOrtho2D 0.0, 30.0, 0.0, 30.0;
glMatrixMode GL_MODELVIEW;

glClear GL_COLOR_BUFFER_BIT;
triangle;
glpFlush;

glpMainLoop;


use SDL::App;
use SDL::Event;
use SDL::OpenGL;

$app = SDL::App->new(
  -gl => 1,
);

sub triangle {
  glBegin(GL_TRIANGLES);
  glColor(1.0, 0.0, 0.0);
  glVertex(5.0, 5.0);
  glColor(0.0, 1.0, 0.0);
  glVertex(25.0, 5.0);
  glColor(0.0, 0.0, 1.0);
  glVertex(5.0, 25.0);
  glEnd();
}

glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, 30.0, 0.0, 30.0);
glMatrixMode(GL_MODELVIEW);
glClear(GL_COLOR_BUFFER_BIT);
triangle();
$app->sync;
$app->loop ({
  SDL_QUIT() => sub { exit; },
});

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