//---------------------------------------------------------------------------

//

//  File: OpenGLTexturedRectTeapot.m

//

//  Abstract: Class that implements a method for displaying a texture 2D  

//            bound to an IBO based teapot with enabled sphere map texture 

//            coordinate generation.

//

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//  Copyright (c) 2011 Apple Inc., All rights reserved.

//

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

#import "OpenGLTexturedRectTeapot.h"

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

#pragma mark -

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

@implementation OpenGLTexturedRectTeapot

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

#pragma mark -

#pragma mark Public - Designated Initializers

//---------------------------------------------------------------------------

- (id) initTexturedRectTeapotdWithPListAtPath:(NSString *)thePListPath

                                         size:(const NSSize *)theSize

{

    self = [super initTeapotBaseWithPListAtPath:thePListPath

                                           size:theSize

                                         target:GL_TEXTURE_RECTANGLE_ARB];

    if( !self )

    {

        NSLog(@">> ERROR: OpenGL Textured Rect Teapot - Failed instantiating the base class!");

    } // if

    return( self );

} // initTexturedRectTeapotdWithPListAtPath

//---------------------------------------------------------------------------

- (id) initTexturedRectWithPListInAppBundle:(NSString *)thePListName

                                       size:(const NSSize *)theSize

{

    self = [super initTeapotWithPListInAppBundle:thePListName

                                            size:theSize

                                          target:GL_TEXTURE_RECTANGLE_ARB];

    if( !self )

    {

        NSLog(@">> ERROR: OpenGL Textured Rect Teapot - Failed instantiating the base class!");

    } // if

    return( self );

} // initTexturedRectWithPListInAppBundle

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

#pragma mark -

#pragma mark Public - Destructors

//---------------------------------------------------------------------------

- (void) dealloc

{

    [super dealloc];

} // dealloc

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------

#pragma mark -

#pragma mark Public - Utilities

//---------------------------------------------------------------------------

- (void) display

{

    // Enable sphere map automatic texture coordinate generation.

    glEnable(GL_TEXTURE_GEN_S);

    glEnable(GL_TEXTURE_GEN_T);

    // Since we will be using GL_TEXTURE_RECTANGLE_ARB textures which 

    // uses pixel coordinates rather than normalized coordinates, we 

    // need to scale the texturing matrix

    glMatrixMode(GL_TEXTURE);

    // To rotate without skewing or translation, we must be in 0-centered 

    // normalized texture coordinates 

    [self normalize];

    // Set to model-view

    glMatrixMode(GL_MODELVIEW);

    // Translate the teapot to the new coordinates

    [self translate];

    // Scale the teapot object

    [self scale];

    // Draw the IBO teapot

    [super display];

    // Disable states & modes 

    glMatrixMode(GL_TEXTURE);

    glLoadIdentity();

    // Reset the model-view matrix

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    // Disable sphere map automatic texture coordinate generation.

    glDisable(GL_TEXTURE_GEN_T);

    glDisable(GL_TEXTURE_GEN_S);

} // display

//---------------------------------------------------------------------------

@end

//---------------------------------------------------------------------------

//---------------------------------------------------------------------------