Practical Algorithms for 3D Computer Graphics, 2nd Edition

8.2. 3D on iOS 303

// File ES1Renderer.h // for GLES version 2

#import "EAGLView.h"

#import <OpenGLES/ES2/gl.h>

#import <OpenGLES/ES2/glext.h>

@interface ES2Renderer : NSObject <ESRenderer>

{

@private

EAGLContext *context; // the device context

// The pixel dimensions of the CAEAGLLayer

GLint backingWidth,backingHeight;

// The OpenGL ES names for the framebuffer and

// renderbuffer used to render to this view

GLuint defaultFramebuffer, colorRenderbuffer;

// The identity of the GPU shader program

// required by GLES version 2 (or greater)

GLuint program;

}

s- (void)render; // srawing method

- (BOOL)resizeFromLayer:(CAEAGLLayer *)layer;

@end

Listing 8.9: The classes ...