Shader_Code_Painters(id)

function Shader_Code_Painters(id)
% Function is written by D.Kroon University of Twente (April 2009)

% From id get the render data
StoreName=['OpenGL' num2str(id)];
data=getappdata(0,[StoreName '_data']);

% Allow to use GL functions without prefixing with Tao.Opengl.
import Tao.OpenGl.*

if(data.FirstRender)
   % Load shaders
   data.program_id=loadOpenGLShader('fragment_program.glsl','vertex_program.glsl');
   
   % Use / Enable the shader code
   Gl.glUseProgram(data.program_id);

    % Store the render data
   setappdata(0,[StoreName '_data'],data);
end
if(data.FirstRender), pause(0.5), end

% Set background clear color to blue            
Gl.glClearColor(0.2, 0.2, 0.2, 0.0);  

% Clear the color and depth buffer
Gl.glClear(int32(bitor(uint32(Gl.GL_COLOR_BUFFER_BIT),uint32(Gl.GL_DEPTH_BUFFER_BIT)))); 

% Set depth testing enabled
Gl.glEnable(Gl.GL_DEPTH_TEST)  

cornersx=[-1  1 -1  1 -1  1 -1  1];
cornersy=[-1 -1  1  1 -1 -1  1  1];
cornersz=[-1 -1  -1 -1  1  1  1  1];

cornersxt=[0 1 0 1 0 1 0 1];
cornersyt=[0 0 1 1 0 0 1 1];
cornerszt=[0 0 0 0 1 1 1 1];

% Enable texture rendering
Gl.glEnable(Gl.GL_TEXTURE_3D);

if(data.FirstRender), pause(0.5), end

Gl.glBegin(Gl.GL_QUADS);
    % 1e Face
    Gl.glTexCoord3f(cornersxt(1), cornersyt(1), cornerszt(1));
    Gl.glVertex3f(cornersx(1), cornersy(1), cornersz(1));
    Gl.glTexCoord3f(cornersxt(2), cornersyt(2), cornerszt(2));
    Gl.glVertex3f(cornersx(2), cornersy(2), cornersz(2));				
    Gl.glTexCoord3f(cornersxt(4), cornersyt(4), cornerszt(4));
    Gl.glVertex3f(cornersx(4), cornersy(4), cornersz(4));				
    Gl.glTexCoord3f(cornersxt(3), cornersyt(3), cornerszt(3));
    Gl.glVertex3f(cornersx(3), cornersy(3), cornersz(3));		
    % 2e Face
    Gl.glTexCoord3f(cornersxt(7), cornersyt(7), cornerszt(7));
    Gl.glVertex3f(cornersx(7), cornersy(7), cornersz(7));				
    Gl.glTexCoord3f(cornersxt(8), cornersyt(8), cornerszt(8));
    Gl.glVertex3f(cornersx(8), cornersy(8), cornersz(8));				
    Gl.glTexCoord3f(cornersxt(6), cornersyt(6), cornerszt(6));
    Gl.glVertex3f(cornersx(6), cornersy(6), cornersz(6));				
    Gl.glTexCoord3f(cornersxt(5), cornersyt(5), cornerszt(5));
    Gl.glVertex3f(cornersx(5), cornersy(5), cornersz(5));

    % 3e Face
    Gl.glTexCoord3f(cornersxt(1), cornersyt(1), cornerszt(1));
    Gl.glVertex3f(cornersx(1), cornersy(1), cornersz(1));				
    Gl.glTexCoord3f(cornersxt(5), cornersyt(5), cornerszt(5));
    Gl.glVertex3f(cornersx(5), cornersy(5), cornersz(5));				
    Gl.glTexCoord3f(cornersxt(6), cornersyt(6), cornerszt(6));
    Gl.glVertex3f(cornersx(6), cornersy(6), cornersz(6));				
    Gl.glTexCoord3f(cornersxt(2), cornersyt(2), cornerszt(2));
    Gl.glVertex3f(cornersx(2), cornersy(2), cornersz(2));
    
    % 4e Face
    Gl.glTexCoord3f(cornersxt(3), cornersyt(3), cornerszt(3));
    Gl.glVertex3f(cornersx(3), cornersy(3), cornersz(3));				
    Gl.glTexCoord3f(cornersxt(4), cornersyt(4), cornerszt(4));
    Gl.glVertex3f(cornersx(4), cornersy(4), cornersz(4));				
    Gl.glTexCoord3f(cornersxt(8), cornersyt(8), cornerszt(8));
    Gl.glVertex3f(cornersx(8), cornersy(8), cornersz(8));				
    Gl.glTexCoord3f(cornersxt(7), cornersyt(7), cornerszt(7));
    Gl.glVertex3f(cornersx(7), cornersy(7), cornersz(7));
    
    % 5e Face
    Gl.glTexCoord3f(cornersxt(4), cornersyt(4), cornerszt(4));
    Gl.glVertex3f(cornersx(4), cornersy(4), cornersz(4));				
    Gl.glTexCoord3f(cornersxt(2), cornersyt(2), cornerszt(2));
    Gl.glVertex3f(cornersx(2), cornersy(2), cornersz(2));				
    Gl.glTexCoord3f(cornersxt(6), cornersyt(6), cornerszt(6));
    Gl.glVertex3f(cornersx(6), cornersy(6), cornersz(6));				
    Gl.glTexCoord3f(cornersxt(8), cornersyt(8), cornerszt(8));
    Gl.glVertex3f(cornersx(8), cornersy(8), cornersz(8));

    % 6e Face
    Gl.glTexCoord3f(cornersxt(3), cornersyt(3), cornerszt(3));
    Gl.glVertex3f(cornersx(3), cornersy(3), cornersz(3));				
    Gl.glTexCoord3f(cornersxt(1), cornersyt(1), cornerszt(1));
    Gl.glVertex3f(cornersx(1), cornersy(1), cornersz(1));				
    Gl.glTexCoord3f(cornersxt(5), cornersyt(5), cornerszt(5));
    Gl.glVertex3f(cornersx(5), cornersy(5), cornersz(5));				
    Gl.glTexCoord3f(cornersxt(7), cornersyt(7), cornerszt(7));
    Gl.glVertex3f(cornersx(7), cornersy(7), cornersz(7));

Gl.glEnd(); 

% Disable Texture rendering
Gl.glDisable(Gl.GL_TEXTURE_3D);

% Flush the pipeline, update the graphics buffer
Gl.glFlush();