How to add objects

[zhuozhuo]

No description provided.

[zhuozhuo]

I want add some objects such as buttons or view.

[mayakraft]

got a solution-
it looks like GLKView Opaque property needs to be NO for this to happen. I'm going to push this small change up to master.

[mayakraft]

my hierarchy looks like this:
GLKViewController
-GLKView (PanoramaView)
--UIKIT Objects (UIButton, UIView)

add all your elements as subviews to PanoramaView and it should work fine

here's my ViewController.m code:
@interface ViewController (){
PanoramaView *panoramaView;
}
@EnD

@implementation ViewController

• (void)viewDidLoad{
  [super viewDidLoad];
  panoramaView = [[PanoramaView alloc] init];
  [panoramaView setImage:@"park_2048.jpg"];
  [panoramaView setOrientToDevice:YES];
  [panoramaView setTouchToPan:NO];
  [panoramaView setPinchToZoom:YES];
  [panoramaView setShowTouches:NO];
  [self setView:panoramaView];

  UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  [button setFrame:CGRectMake(10, 10, 100, 100)];
  [button setBackgroundColor:[UIColor blackColor]];
  [panoramaView addSubview:button];
  [button addTarget:self action:@selector(buttonAction) forControlEvents:UIControlEventTouchUpInside];
  }

-(void) buttonAction{
NSLog(@"hit");
}

-(void) glkView:(GLKView *)view drawInRect:(CGRect)rect{
[panoramaView draw];
}

@EnD

[zhuozhuo]

Thank you for your answer。But I want to let button follow panoramaView rotation movement.

[mayakraft]

oh, i would build an object in openGL, putting it where this comment is:
//TODO: add any objects here to make them a part of the virtual reality
that way it distorts properly and feels like it's integrated.

if you just want a UIKit object tracking a point (it wouldn't rotate for example), then you want to convert a unit vector to a screen point. i have a function
-(GLKVector3) vectorFromScreenLocation:(CGPoint)screenTouch inAttitude:(GLKMatrix4)matrix;
and what you'd want is the inverse of that. which might be useful to have. i don't have time free time at the moment, but if you want to take care of it I'll merge it. Or I can look into it at a later time.

[autresphere]

Hi,
Any news about this screenLocationFromVector method?
Thanks in advance.

[autresphere]

Here is some code that returns the location on screen from a 3D point:

- (BOOL)computeScreenLocation:(CGPoint*)location fromVector:(GLKVector3)vector inAttitude:(GLKMatrix4)matrix
{
    GLKVector4 screenVector;
    GLKVector4 vector4;

    if(location == NULL)
        return NO;

    matrix = GLKMatrix4Multiply(_projectionMatrix, matrix);
    vector4 = GLKVector4Make(vector.x, vector.y, vector.z, 1);
    screenVector = GLKMatrix4MultiplyVector4(matrix, vector4);

    location->x = (screenVector.x/screenVector.w/2.0 + 0.5) * self.frame.size.width;
    location->y = (0.5-screenVector.y/screenVector.w/2) * self.frame.size.height;

    return (screenVector.z >= 0);
}

This method returns wether the point is before or behind the screen.
It does work in portrait but would need some additional code to take care of all orientations.
I will create a PR if I find some time.

[mayakraft]

it actually works fine with orientations, it alerted me to another issue- orientation handling is being over-complicated, fixing it now.