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Sources/Classes/View/OpenGL/OpenGLView.m

/*

     File: OpenGLView.m

 Abstract:

 OpenGL view base custom class.

  Version: 2.0

 Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple

 Inc. ("Apple") in consideration of your agreement to the following

 terms, and your use, installation, modification or redistribution of

 this Apple software constitutes acceptance of these terms.  If you do

 not agree with these terms, please do not use, install, modify or

 redistribute this Apple software.

 In consideration of your agreement to abide by the following terms, and

 subject to these terms, Apple grants you a personal, non-exclusive

 license, under Apple's copyrights in this original Apple software (the

 "Apple Software"), to use, reproduce, modify and redistribute the Apple

 Software, with or without modifications, in source and/or binary forms;

 provided that if you redistribute the Apple Software in its entirety and

 without modifications, you must retain this notice and the following

 text and disclaimers in all such redistributions of the Apple Software.

 Neither the name, trademarks, service marks or logos of Apple Inc. may

 be used to endorse or promote products derived from the Apple Software

 without specific prior written permission from Apple.  Except as

 expressly stated in this notice, no other rights or licenses, express or

 implied, are granted by Apple herein, including but not limited to any

 patent rights that may be infringed by your derivative works or by other

 works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,

 MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED

 AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),

 STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE

 POSSIBILITY OF SUCH DAMAGE.

 Copyright (C) 2013 Apple Inc. All Rights Reserved.

*/

#pragma mark -

#pragma mark Private - Headers

#import "OpenGLView.h"

#pragma mark -

#pragma mark Private - Constants

static const unichar kESCKey = 27;

#pragma mark -

#pragma mark Private - Data Structures

struct OpenGLViewFullScreen

    NSDictionary  *mpOptions;   // full screen dictionary options

    NSScreen      *mpScreen;    // full screen

};

typedef struct OpenGLViewFullScreen  OpenGLViewFullScreen;

struct OpenGLViewLocation

    NSPoint  m_Mouse;   // last place the mouse was

    NSPoint  m_Window;  // last place the mouse was

};

typedef struct OpenGLViewLocation  OpenGLViewLocation;

struct OpenGLViewMouseButton

    BOOL  mbIsLeft;     // was the left mouse button pressed?

    BOOL  mbIsRight;    // was the right mouse button pressed?

};

typedef struct OpenGLViewMouseButton  OpenGLViewMouseButton;

struct OpenGLViewRotation

    BOOL      mbRotate; // Set the flag to rotate

    GLdouble  mnPitch;  // pitch used for animation

    GLdouble  mnRoll;   // roll used for animation

    GLdouble  mnTime;   // used to compute change in time

    GLdouble  mnDPS;    // view degrees of rotation per second

};

typedef struct OpenGLViewRotation  OpenGLViewRotation;

struct OpenGLViewAttribs

    GLint     mnInterval;   // swap interval

    GLint     mnAlignment;  // unpack alignment

    CGLError  mnError;      // CGL errors

};

typedef struct OpenGLViewAttribs  OpenGLViewAttribs;

struct OpenGLViewport

    GLdouble  mnLeft;       // Coordinate for the left vertical clipping plane

    GLdouble  mnRight;      // Coordinate for the right vertical clipping plane

    GLdouble  mnBottom;     // Coordinate for the bottom horizontal clipping plane

    GLdouble  mnTop;        // Coordinate for the top horizontal clipping plane

    GLdouble  mnZNear;      // Distance to the near depth clipping plane

    GLdouble  mnZFar;       // Distance to the far depth clipping plane

    GLdouble  mnAspect;     // aspect ratio

    GLdouble  mnScale;      // view scale factor

    GLdouble  mnZoom;       // zoom factor

    NSRect    m_Bounds;     // view bounds

};

typedef struct OpenGLViewport  OpenGLViewport;

struct OpenGLViewData

    CGLContextObj          mpContextObj;    // CGL context object

    OpenGLView            *mpSelf;          // Referencing self

    OpenGLViewport         m_Viewport;      // View size and origins

    OpenGLViewRotation     m_Rotation;      // Rotation in a view

    OpenGLViewAttribs      m_Attribs;       // View attributes

    OpenGLViewMouseButton  m_Button;        // Mouse down

    OpenGLViewFullScreen   m_FullScreen;    // View full screen

    OpenGLViewLocation     m_Location;      // Locations in a view

};

typedef struct OpenGLViewData  OpenGLViewData;

#pragma mark -

#pragma mark Private - Utilties - Fullscreen

static void OpenGLViewExitFullScreen(OpenGLViewDataRef pGLView)

    if([pGLView->mpSelf isInFullScreenMode])

        CGLContextObj pContextObj = (CGLContextObj)[[pGLView->mpSelf openGLContext] CGLContextObj];

        if(pContextObj != NULL)

            CGLSetCurrentContext(pContextObj);

            CGLError nError = CGLLockContext(pContextObj);

            if(nError == kCGLNoError)

                [pGLView->mpSelf exitFullScreenModeWithOptions:pGLView->m_FullScreen.mpOptions];

            } // if

            CGLUnlockContext(pContextObj);

        } // if

    } // if

} // OpenGLViewExitFullScreen

static BOOL OpenGLViewToggleFullScreen(OpenGLViewDataRef pGLView)

    CGLContextObj pContextObj = (CGLContextObj)[[pGLView->mpSelf openGLContext] CGLContextObj];

    BOOL bSuccess = pContextObj != NULL;

    if(bSuccess)

        CGLSetCurrentContext(pContextObj);

        CGLError nError = CGLLockContext(pContextObj);

        bSuccess = nError == kCGLNoError;

        if(bSuccess)

            bSuccess = [pGLView->mpSelf isInFullScreenMode];

            if(bSuccess)

                [pGLView->mpSelf exitFullScreenModeWithOptions:pGLView->m_FullScreen.mpOptions];

            } // if

            else

                [pGLView->mpSelf enterFullScreenMode:pGLView->m_FullScreen.mpScreen

                                         withOptions:pGLView->m_FullScreen.mpOptions];

            } // else

        } // if

        CGLUnlockContext(pContextObj);

    } // if

    return(bSuccess);

} // OpenGLViewToggleFullScreen

#pragma mark -

#pragma mark Private - Utilties - Mouse Location

static inline void OpenGLViewSetMouseUpdate(NSEvent *pEvent,

                                            OpenGLViewDataRef pGLView)

    NSPoint window = [pEvent locationInWindow];

    NSPoint mouse  = [pGLView->mpSelf convertPoint:window

                                          fromView:nil];

    if(pGLView->m_Rotation.mbRotate)

        pGLView->m_Rotation.mnRoll  += pGLView->m_Location.m_Mouse.y - mouse.y;

        pGLView->m_Rotation.mnPitch -= pGLView->m_Location.m_Mouse.x - mouse.x;

    } // if

    pGLView->m_Location.m_Mouse  = mouse;

    pGLView->m_Location.m_Window = window;

} // OpenGLViewSetMouseUpdate

static inline void OpenGLViewSetMouseLocation(NSEvent *pEvent,

                                              OpenGLViewDataRef pGLView)

    if(pEvent)

        pGLView->m_Location.m_Window = [pEvent locationInWindow];

        pGLView->m_Location.m_Mouse  = [pGLView->mpSelf convertPoint:pGLView->m_Location.m_Window

                                                            fromView:nil];

    } // if

} // OpenGLViewSetMouseLocation

#pragma mark -

#pragma mark Private - Utilties - Prepare

static BOOL OpenGLViewSetMTEngine(OpenGLViewDataRef pGLView)

    CGLContextObj  pContext = CGLGetCurrentContext();

    if(pContext != NULL)

        // Enable the multi-threaded OpenGL engine

        pGLView->m_Attribs.mnError = CGLEnable(pContext, kCGLCEMPEngine);

        if(pGLView->m_Attribs.mnError != kCGLNoError)

            // Multi-threaded execution is possibly not available

            // so what was the returned CGL error?

            NSLog(@">> [OpenGL View] ERROR: Initializing multi-threaded OpenGL Engine!");

        } // if

    } // if

    return pGLView->m_Attribs.mnError == kCGLNoError;

} // OpenGLViewSetMTEngine

static void OpenGLViewSetStates(OpenGLViewDataRef pGLView)

    // shading mathod: GL_SMOOTH or GL_FLAT

    glShadeModel(GL_SMOOTH);

    // 4-byte pixel alignment

    glPixelStorei(GL_UNPACK_ALIGNMENT, pGLView->m_Attribs.mnAlignment);

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

//

    // For some OpenGL implementations, texture coordinates generated

    // during rasterization aren't perspective correct. However, you

    // can usually make them perspective correct by calling the API

    // glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST).  Colors

    // generated at the rasterization stage aren't perspective correct

    // in almost every OpenGL implementation, / and can't be made so.

    // For this reason, you're more likely to encounter this problem

    // with colors than texture coordinates.

//

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

    glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);

    // Set up the projection

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    glFrustum(-0.3, 0.3, 0.0, 0.6, 1.0, 8.0);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    glTranslated(0.0, 0.0f, -2.0);

    // Turn on depth test

    glEnable(GL_DEPTH_TEST);

    // track material ambient and diffuse from surface color,

    // call it before glEnable(GL_COLOR_MATERIAL)

    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);

    glEnable(GL_COLOR_MATERIAL);

    // Clear to black nothing fancy.

    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

    // clear stencil buffer

    glClearStencil(0);

    // 0 is near, 1 is far

    glClearDepth(1.0f);

    glDepthFunc(GL_LEQUAL);

    // Setup blending function

    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    // Enable client states

    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

    glEnableClientState(GL_VERTEX_ARRAY);

} // OpenGLViewSetStates

// Set up the GL contexts swap interval -- passing 1 means that the buffers

// are swapped only during the vertical retrace of the monitor.

static inline void OpenGLViewSetSwapInterval(OpenGLViewDataRef pGLView)

    [[pGLView->mpSelf openGLContext] setValues:&pGLView->m_Attribs.mnInterval

                                  forParameter:NSOpenGLCPSwapInterval];

} // OpenGLViewSetSwapInterval

static inline void OpenGLViewSetFullScreen(OpenGLViewDataRef pGLView)

    pGLView->m_FullScreen.mpOptions = [[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES]

                                                                   forKey:NSFullScreenModeSetting] retain];

    pGLView->m_FullScreen.mpScreen = [[NSScreen mainScreen] retain];

} // OpenGLViewSetFullScreen

static inline void OpenGLViewSetDefaults(OpenGLView *pSelf,

                                         OpenGLViewDataRef pGLView)

    pGLView->mpSelf                =  pSelf;

    pGLView->m_Viewport.mnZoom     =  1.0;

    pGLView->m_Viewport.mnScale    =  0.5;

    pGLView->m_Viewport.mnZNear    =  1.0;

    pGLView->m_Viewport.mnZFar     =  10.0;

    pGLView->m_Rotation.mnTime     = -1.0;

    pGLView->m_Rotation.mnDPS      =  30.0;

    pGLView->m_Attribs.mnAlignment =  4;

    pGLView->m_Attribs.mnInterval  =  1;

    pGLView->m_Attribs.mnError     =  kCGLBadContext;

} // OpenGLViewSetDefaults

#pragma mark -

#pragma mark Private - Utilties - Constructor

static OpenGLViewDataRef OpenGLViewCreate(OpenGLView *pSelf)

    OpenGLViewDataRef pGLView = NULL;

    if(pSelf)

        pGLView = (OpenGLViewDataRef)calloc(1, sizeof(OpenGLViewData));

        if(pGLView != NULL)

            OpenGLViewSetDefaults(pSelf, pGLView);

            OpenGLViewSetSwapInterval(pGLView);

            OpenGLViewSetMTEngine(pGLView);

            OpenGLViewSetStates(pGLView);

            OpenGLViewSetFullScreen(pGLView);

        } // if

        else

            NSLog(@">> [OpenGL View] ERROR: Failure Allocating Memory For OpenGL View Attributes!");

        } // else

    } // if

    return pGLView;

} // OpenGLViewCreate

#pragma mark -

#pragma mark Private - Utilties - Destructor

static inline void OpenGLViewDeleteOptions(OpenGLViewDataRef pGLView)

    if(pGLView->m_FullScreen.mpOptions)

        [pGLView->m_FullScreen.mpOptions release];

        pGLView->m_FullScreen.mpOptions = nil;

    } // if

} // OpenGLViewDeleteOptions

static inline void OpenGLViewDeleteScreen(OpenGLViewDataRef pGLView)

    if(pGLView->m_FullScreen.mpScreen)

        [pGLView->m_FullScreen.mpScreen release];

        pGLView->m_FullScreen.mpScreen = nil;

    } // if

} // OpenGLViewDeleteScreen

static void OpenGLViewDelete(OpenGLViewDataRef pGLView)

    if(pGLView != NULL)

        OpenGLViewExitFullScreen(pGLView);

        OpenGLViewDeleteScreen(pGLView);

        OpenGLViewDeleteOptions(pGLView);

        free(pGLView);

        pGLView = NULL;

    } // if

} // OpenGLViewDelete

#pragma mark -

#pragma mark Private - Utilties - Rotation

static inline GLdouble OpenGLViewUpdateTime(OpenGLViewDataRef pGLView)

    GLdouble  nDelta = 0.0;

    GLdouble  nTime  = (GLdouble)[NSDate timeIntervalSinceReferenceDate];

    if(pGLView->m_Rotation.mnTime < 0.0)

        nDelta = 0.0;

    } // if

    else

        nDelta = nTime - pGLView->m_Rotation.mnTime;

    } // else

    pGLView->m_Rotation.mnTime = nTime;

    return  nDelta;

} // OpenGLViewUpdateTime

static inline void OpenGLViewUpdateRoll(OpenGLViewDataRef pGLView)

    if(pGLView->m_Rotation.mnRoll < -45.0)

        pGLView->m_Rotation.mnRoll = -45.0;

    } // if

    else if(pGLView->m_Rotation.mnRoll > 90.0)

        pGLView->m_Rotation.mnRoll = 90.0;

    } // else if

    glRotated(pGLView->m_Rotation.mnRoll, 1.0, 0.0, 0.0);

} // OpenGLViewUpdateRoll

static inline void OpenGLViewUpdatePitch(OpenGLViewDataRef pGLView)

    if(!pGLView->m_Button.mbIsLeft || !pGLView->m_Button.mbIsRight)

        GLdouble timeDelta = OpenGLViewUpdateTime(pGLView);

        pGLView->m_Rotation.mnPitch += pGLView->m_Rotation.mnDPS * timeDelta;

        if (pGLView->m_Rotation.mnPitch >= 360.0f)

            pGLView->m_Rotation.mnPitch -= 360.0f;

        } // if

    } // if

    glRotated(pGLView->m_Rotation.mnPitch, 0.0, 1.0, 0.0);

    pGLView->m_Rotation.mnPitch += 0.2;

} // OpenGLViewUpdatePitch

// Constant rotation in the view

static void OpenGLViewUpdateRotation(OpenGLViewDataRef pGLView)

    if(pGLView->m_Rotation.mbRotate)

        OpenGLViewUpdatePitch(pGLView);

        OpenGLViewUpdateRoll(pGLView);

    } // if

    else

        pGLView->m_Rotation.mnRoll  = 0.0;

        pGLView->m_Rotation.mnPitch = 0.0;

    } // else

} // OpenGLViewUpdateRotation

#pragma mark -

#pragma mark Private - Utilties - Viewport

static inline BOOL OpenGLViewLock(OpenGLViewDataRef pGLView)

    BOOL bSuccess = pGLView->mpSelf != nil;

    if(bSuccess)

        NSOpenGLContext *pContext = [pGLView->mpSelf openGLContext];

        bSuccess = pContext != nil;

        if(bSuccess)

            pGLView->mpContextObj = (CGLContextObj)[pContext CGLContextObj];

            bSuccess = pGLView->mpContextObj != NULL;

            if(bSuccess)

                CGLSetCurrentContext(pGLView->mpContextObj);

                CGLError nError = CGLLockContext(pGLView->mpContextObj);

                bSuccess = nError == kCGLNoError;

            } // if

        } // if

    } // if

    return  bSuccess;

} // OpenGLViewLock

static inline void OpenGLViewUnlock(OpenGLViewDataRef pGLView)

    CGLUnlockContext(pGLView->mpContextObj);

} // OpenGLViewUnlock

static void OpenGLViewSetPrespective(OpenGLViewDataRef pGLView)

    // Compute viewport properties

    pGLView->m_Viewport.m_Bounds =  [pGLView->mpSelf bounds];

    pGLView->m_Viewport.mnAspect =  pGLView->m_Viewport.m_Bounds.size.width / pGLView->m_Viewport.m_Bounds.size.height;

    pGLView->m_Viewport.mnTop    =  pGLView->m_Viewport.mnScale * pGLView->m_Viewport.mnZoom;

    pGLView->m_Viewport.mnBottom = -pGLView->m_Viewport.mnTop;

    pGLView->m_Viewport.mnRight  =  pGLView->m_Viewport.mnAspect * pGLView->m_Viewport.mnTop;

    pGLView->m_Viewport.mnLeft   = -pGLView->m_Viewport.mnRight;

    // Set to use projection matrix

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    // Set the transformation matrix

    glFrustum(pGLView->m_Viewport.mnLeft,

              pGLView->m_Viewport.mnRight,

              pGLView->m_Viewport.mnBottom,

              pGLView->m_Viewport.mnTop,

              pGLView->m_Viewport.mnZNear,

              pGLView->m_Viewport.mnZFar);

    // Set to use model-view matrix

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

} // OpenGLViewSetPrespective

static inline void OpenGLViewSetPrespectiveBlocking(OpenGLViewDataRef pGLView)

    if(OpenGLViewLock(pGLView))

        OpenGLViewSetPrespective(pGLView);

        OpenGLViewUnlock(pGLView);

    } // if

} // OpenGLViewSetPrespectiveBlocking

static void OpenGLViewSetPort(OpenGLViewDataRef pGLView)

    GLint    x      = (GLint)(pGLView->m_Viewport.m_Bounds.origin.x);

    GLint    y      = (GLint)(pGLView->m_Viewport.m_Bounds.origin.y);

    GLsizei  width  = (GLsizei)(pGLView->m_Viewport.m_Bounds.size.width);

    GLsizei  height = (GLsizei)(pGLView->m_Viewport.m_Bounds.size.height);

    glViewport(x, y, width, height);

    glTranslated(0.0f, 0.0, -3.0);

} // OpenGLViewSetPort

static inline void OpenGLViewUpdatePort(OpenGLViewDataRef pGLView)

    // Set our viewport with correct prespective

    OpenGLViewSetPrespective(pGLView);

    OpenGLViewSetPort(pGLView);

    // Constant rotation in the view

    OpenGLViewUpdateRotation(pGLView);

} // OpenGLViewUpdatePort

static inline void OpenGLViewUpdatePortBlocking(OpenGLViewDataRef pGLView)

    if(OpenGLViewLock(pGLView))

        OpenGLViewUpdatePort(pGLView);

        OpenGLViewUnlock(pGLView);

    } // if

} // OpenGLViewUpdatePortBlocking

#pragma mark -

#pragma mark Private - Utilties - Keyboard

static void OpenGLViewKeyDown(NSEvent *pEvent,

                              OpenGLViewDataRef pGLView)

    if(pEvent)

        NSString *pCharacters = [pEvent charactersIgnoringModifiers];

        if(pCharacters)

            unichar keyPressed = [pCharacters characterAtIndex:0];

            if(keyPressed == kESCKey)

                OpenGLViewToggleFullScreen(pGLView);

            } // if

        } // if

    } // if

} // OpenGLViewKeyDown

#pragma mark -

#pragma mark Private - Utilties - Mouse

static inline void OpenGLViewMouseDown(NSEvent *pEvent,

                                       OpenGLViewDataRef pGLView)

    OpenGLViewSetMouseLocation(pEvent, pGLView);

    pGLView->m_Button.mbIsLeft = YES;

} // OpenGLViewMouseDown

static inline void OpenGLViewRightMouseDown(NSEvent *pEvent,

                                            OpenGLViewDataRef pGLView)

    OpenGLViewSetMouseLocation(pEvent, pGLView);

    pGLView->m_Button.mbIsRight = YES;

} // OpenGLViewRightMouseDown

static inline void OpenGLViewMouseDragged(NSEvent *pEvent,

                                          OpenGLViewDataRef pGLView)

    if(pEvent)

        if([pEvent modifierFlags] & NSRightMouseDown)

            [pGLView->mpSelf rightMouseDragged:pEvent];

        } // if

        else

            OpenGLViewSetMouseUpdate(pEvent, pGLView);

        } // else

    } // if

} // OpenGLViewMouseDragged

static inline void OpenGLViewRightMouseDragged(NSEvent *pEvent,

                                               OpenGLViewDataRef pGLView)

    if(pEvent)

        NSPoint window = [pEvent locationInWindow];

        NSPoint mouse  = [pGLView->mpSelf convertPoint:window

                                              fromView:nil];

        pGLView->m_Viewport.mnZoom += 0.01f * (pGLView->m_Location.m_Mouse.y - mouse.y);

        if (pGLView->m_Viewport.mnZoom < 0.05f)

            pGLView->m_Viewport.mnZoom = 0.05f;

        } // if

        else if (pGLView->m_Viewport.mnZoom > 2.0f)

            pGLView->m_Viewport.mnZoom = 2.0f;

        } // else if

        pGLView->m_Location.m_Mouse  = mouse;

        pGLView->m_Location.m_Window = window;

        OpenGLViewSetPrespectiveBlocking(pGLView);

    } // if

} // OpenGLViewRightMouseDragged

#pragma mark -

#pragma mark Private - Utilties - Pixel Format

static NSOpenGLPixelFormat *OpenGLViewCreatePixelFormat(const GLuint nColorBits)

    NSOpenGLPixelFormatAttribute attribs[] =

        NSOpenGLPFADoubleBuffer,

        NSOpenGLPFAAccelerated,

        NSOpenGLPFAAllowOfflineRenderers,

        NSOpenGLPFAColorSize, nColorBits,

};

    return [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];

} // OpenGLViewCreatePixelFormat

#pragma mark -

@implementation OpenGLView

#pragma mark -

#pragma mark Public - Prepare

- (id) initWithFrame:(NSRect)frame

    NSOpenGLPixelFormat *pFormat = OpenGLViewCreatePixelFormat(24);

    if( pFormat )

        self = [super initWithFrame:frame

                        pixelFormat:pFormat];

        if( self )

            mpGLView = OpenGLViewCreate(self);

        } // if

        // Pixel format is not needed beyond this point

        [pFormat release];

    } // if

    return self;

} // initWithFrame

#pragma mark -

#pragma mark Public - Destructors

- (void) cleanUp

    OpenGLViewDelete(mpGLView);

} // cleanUp

- (void) dealloc

    OpenGLViewDelete(mpGLView);

    [super dealloc];

} // dealloc

#pragma mark -

#pragma mark Public - Delegates

- (BOOL) acceptsFirstResponder

    return YES;

} // acceptsFirstResponder

- (BOOL) becomeFirstResponder

    return  YES;

} // becomeFirstResponder

- (BOOL) resignFirstResponder

    return YES;

} // resignFirstResponder

#pragma mark -

#pragma mark Public - Utilites - Full Screen Mode

- (BOOL) toggleFullscreen

    return OpenGLViewToggleFullScreen(mpGLView);

} // toggleFullscreen

#pragma mark -

#pragma mark Public - Utilites - Updates

- (void) transform:(const bool)doBlock

    if(doBlock)

        OpenGLViewUpdatePortBlocking(mpGLView);

    } // if

    else

        OpenGLViewUpdatePort(mpGLView);

    } // else

} // transform

- (void) update

    OpenGLViewUpdatePortBlocking(mpGLView);

    [super update];

} // update

- (void) reshape

    OpenGLViewUpdatePortBlocking(mpGLView);

    [super reshape];

} // reshape

- (void) renewGState

    [[self window] disableScreenUpdatesUntilFlush];

    [super renewGState];

} // renewGState

#pragma mark -

#pragma mark Public - Utilites - Rotation

- (void) rotate:(const BOOL)doRotate

    mpGLView->m_Rotation.mbRotate = doRotate;

} // rotate

#pragma mark -

#pragma mark Public - Utilites - Mouse

- (void) mouseDown:(NSEvent *)theEvent

    OpenGLViewMouseDown(theEvent, mpGLView);

} // mouseDown

- (void) rightMouseDown:(NSEvent *)theEvent

    OpenGLViewRightMouseDown(theEvent, mpGLView);

} // rightMouseDown

- (void)mouseUp:(NSEvent *)theEvent

    mpGLView->m_Button.mbIsLeft = NO;

} // mouseUp

- (void) rightMouseUp:(NSEvent *)theEvent

    mpGLView->m_Button.mbIsRight = NO;

} // rightMouseUp

- (void)mouseDragged:(NSEvent *)theEvent

    OpenGLViewMouseDragged(theEvent, mpGLView);

} // mouseDragged

- (void)rightMouseDragged:(NSEvent *)theEvent

    OpenGLViewRightMouseDragged(theEvent, mpGLView);

} // rightMouseDragged

#pragma mark -

#pragma mark Public - Utilites - Keydown

- (void) keyDown:(NSEvent *)theEvent

    OpenGLViewKeyDown(theEvent, mpGLView);

} // keyDown

@end

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