OpenGL, device-oriented, touch-interactive
acceptable image sizes: (4096×2048), 2048×1024, 1024×512, 512×256, 256×128 ...
- (4096 supported on iPhone 4s and iPad2 onward)
#methods
-(void) setImage:(NSString*)fileName; // path or bundle. will check at both // auto-update (usually only one of these at a time is recommended)
-(void) setOrientToDevice:(BOOL) // activate motion sensors
-(void) setTouchToPan:(BOOL) // activate UIPanGesture
// aligns z-axis (into screen)
-(void) orientToVector:(GLKVector3)
-(void) orientToAzimuth:(float) Altitude:(float)-(void) setFieldOfView:(float) // in degrees
-(void) setPinchToZoom:(BOOL) // activate UIPinchGesture-(void) setShowTouches:(BOOL) // overlay latitude longitude intersects
-(BOOL) touchInRect:(CGRect) // hotspot detection in world coordinates-(CGPoint) screenLocationFromVector:(GLKVector3) // 2D screen point from a 3D point
-(GLKVector3) vectorFromScreenLocation:(CGPoint) // 3D point from 2D screen point
-(CGPoint) imagePixelAtScreenLocation:(CGPoint) // 3D point from 2D screen point
// except this 3D point is expressed as 2D pixel unit in the panorama imagemake your ViewController a subclass of GLKViewController
panoramaView = [[PanoramaView alloc] init];
// load image and any other customization
[self setView:panoramaView];also in your GLKViewController:
-(void) glkView:(GLKView *)view drawInRect:(CGRect)rect{
[panoramaView draw];
}- no device landscape/portrait auto-rotation
- works properly under any of the 4 device orientations
- azimuth and altitude
- look direction, the Z vector pointing through the center of the screen
The program begins by facing the center column of the image, or azimuth 0°
equirectangular images mapped to the inside of a celestial sphere come out looking like the original scene, and the math is relatively simple http://en.wikipedia.org/wiki/Equirectangular_projection
MIT