NAME

  OpenGL::Shader::Common - copyright 2007 Graphcomp - ALL RIGHTS RESERVED
  Author: Bob "grafman" Free - grafman@graphcomp.com

  This program is free software; you can redistribute it and/or
  modify it under the same terms as Perl itself.

DESCRIPTION

  This module provides a base class for OpenGL shader types.
  Requires the OpenGL module.

SYNOPSIS

  ##########
  # Instantiate a shader

  use OpenGL::Shader;
  my $shdr = new OpenGL::Shader();


  ##########
  # Methods defined in this module:

  # Get shader type.
  my $type = $shdr->GetType();

  # Get shader version
  my $ver = $shdr->GetVersion();

  # Get shader description
  my $desc = $shdr->GetDescription();

  # Load shader files.
  my $stat = $shdr->LoadFiles($fragment_file,$vertex_file);

  # Get shader GL constants.
  my $fragment_const = $shdr->GetFragmentConstant();
  my $vertex_const = $shdr->GetVertexConstant();

  # Get objects.
  my $fragment_shader = $shdr->GetFragmentShader();
  my $vertex_shader = $shdr->GetVertexShader();
  my $program = $shdr->GetProgram();


  ##########
  # Methods defined in subclasses:

  # Load shader text.
  $shdr->Load($fragment,$vertex);

  # Enable shader.
  $shdr->Enable();

  # Set Vertex Attribute
  my $attr_id = $self->MapAttr($attr_name);
  glVertexAttrib4fARB($attr_id,$x,$y,$z,$w);

  # Get Global Variable ID (uniform/env)
  my $var_id = $self->Map($var_name);

  # Set float4 vector variable
  $stat = $self->SetVector($var_name,$x,$y,$z,$w);

  # Set float4x4 matrix via OGA
  $stat = $self->SetMatrix($var_name,$oga);

  # Disable shader.
  $shdr->Disable();

  # Destructor.
  $shdr->DESTROY();