QGLFlush
========

Born as a geek joke about the glFlush() function, this project aims to demonstrate tricks on three
areas of programming, namely: Pixel by Pixel Animation, Python Embedded Scripting and Mathematics
Applied to Computer Graphics.

I. Requirements
II. Installation
III. Usage
IV. Documentation
V. License
VI. Author

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I. Requirements

QGLFlush is based on the Qt Framework, specifically on these modules:

     - QtGui
     - QtCore
     - QtOpenGL

You will also need:

    - Python development files
    - Python OpenGL module
    - Qscintilla (in particular, the Python Lexer)

Finally, you will need Git to fetch the code.

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II. Installation

- Get the code from the repository:

  git clone git://github.com/dMaggot/QGLFlush.git

- Change into the fetched directory, create Makefile and compile:

  cd QGLFlush
  qmake
  make

If everything went ok, you should have a QGLFlush binary in the QGLFLush folder.

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III. Usage

QGLFLush provides a Python interpreter which can be used to issue Python OpenGL commands. Under
the interpreter, the following modules have already been imported:

    - OpenGL.GL
    - OpenGL.GLU
    - OpenGL.GLUT

The 2D orthogonal box defined for the QGLWidget ranges from (-100,-100) to (100,100). Update
button updates the QGLWidget with current Python OpenGL code in the interpreter. glFlush() button
(literally) flushes the contents of the QGLWidget.An example of code that will work on the
interpreter is this one, based on NeHe's lesson 2:

def DrawGLScene():
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
	glLoadIdentity()
	glScalef(25,25,1)

	glTranslatef(-1.5, 0.0, 0)

	glBegin(GL_POLYGON)
	glVertex3f(0.0, 1.0, 0.0)
	glVertex3f(1.0, -1.0, 0.0)
	glVertex3f(-1.0, -1.0, 0.0)
	glEnd()

	glTranslatef(3.0, 0.0, 0.0)

	glBegin(GL_QUADS)
	glVertex3f(-1.0, 1.0, 0.0)
	glVertex3f(1.0, 1.0, 0.0)
	glVertex3f(1.0, -1.0, 0.0)
	glVertex3f(-1.0, -1.0, 0.0)
	glEnd()

DrawGLScene()

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IV. Documentation

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V. License

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

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VI. Author

David E. Narváez
dMaggot
[email protected]