Struct SCNCameraController

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pub struct SCNCameraController { /* private fields */ }

Available on crate feature SCNCameraController only.

Expand description

Apple’s documentation

Implementations§

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impl SCNCameraController

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pub unsafe fn delegate( &self, ) -> Option<Retained<ProtocolObject<dyn SCNCameraControllerDelegate>>>

§Safety

This is not retained internally, you must ensure the object is still alive.

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pub unsafe fn setDelegate( &self, delegate: Option<&ProtocolObject<dyn SCNCameraControllerDelegate>>, )

Setter for delegate.

§Safety

This is unretained, you must ensure the object is kept alive while in use.

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pub unsafe fn pointOfView(&self) -> Option<Retained<SCNNode>>

Available on crate feature SCNNode only.

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pub unsafe fn setPointOfView(&self, point_of_view: Option<&SCNNode>)

Available on crate feature SCNNode only.

Setter for pointOfView.

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pub unsafe fn interactionMode(&self) -> SCNInteractionMode

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pub unsafe fn setInteractionMode(&self, interaction_mode: SCNInteractionMode)

Setter for interactionMode.

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pub unsafe fn target(&self) -> SCNVector3

Available on crate features SceneKitTypes and objc2-core-foundation only.

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pub unsafe fn setTarget(&self, target: SCNVector3)

Available on crate features SceneKitTypes and objc2-core-foundation only.

Setter for target.

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pub unsafe fn automaticTarget(&self) -> bool

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pub unsafe fn setAutomaticTarget(&self, automatic_target: bool)

Setter for automaticTarget.

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pub unsafe fn worldUp(&self) -> SCNVector3

Available on crate features SceneKitTypes and objc2-core-foundation only.

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pub unsafe fn setWorldUp(&self, world_up: SCNVector3)

Available on crate features SceneKitTypes and objc2-core-foundation only.

Setter for worldUp.

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pub unsafe fn setMinimumHorizontalAngle( &self, minimum_horizontal_angle: c_float, )

Setter for minimumHorizontalAngle.

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pub unsafe fn maximumHorizontalAngle(&self) -> c_float

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pub unsafe fn setMaximumHorizontalAngle( &self, maximum_horizontal_angle: c_float, )

Setter for maximumHorizontalAngle.

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pub unsafe fn translateInCameraSpaceByX_Y_Z( &self, delta_x: c_float, delta_y: c_float, delta_z: c_float, )

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pub unsafe fn frameNodes(&self, nodes: &NSArray<SCNNode>)

Available on crate feature SCNNode only.

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pub unsafe fn rotateByX_Y(&self, delta_x: c_float, delta_y: c_float)

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pub unsafe fn rollBy_aroundScreenPoint_viewport( &self, delta: c_float, point: CGPoint, viewport: CGSize, )

Available on crate feature objc2-core-foundation only.

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pub unsafe fn dollyBy_onScreenPoint_viewport( &self, delta: c_float, point: CGPoint, viewport: CGSize, )

Available on crate feature objc2-core-foundation only.

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pub unsafe fn rollAroundTarget(&self, delta: c_float)

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pub unsafe fn dollyToTarget(&self, delta: c_float)

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pub unsafe fn clearRoll(&self)

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pub unsafe fn stopInertia(&self)

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pub unsafe fn beginInteraction_withViewport( &self, location: CGPoint, viewport: CGSize, )

Available on crate feature objc2-core-foundation only.

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pub unsafe fn continueInteraction_withViewport_sensitivity( &self, location: CGPoint, viewport: CGSize, sensitivity: CGFloat, )

Available on crate feature objc2-core-foundation only.

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pub unsafe fn endInteraction_withViewport_velocity( &self, location: CGPoint, viewport: CGSize, velocity: CGPoint, )

Available on crate feature objc2-core-foundation only.

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impl SCNCameraController

Methods declared on superclass NSObject.

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pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

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pub unsafe fn new() -> Retained<Self>

Methods from Deref<Target = NSObject>§

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pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>§

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pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

§Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

§Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

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pub unsafe fn get_ivar<T>(&self, name: &str) -> &T
where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

§Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

§Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

§Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

§Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

§Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}