SCNode doesn't have boundingBox property in Objective-c?-CodePudding

I'm trying to correctly position another SCNode and all the examples I find are using the boundingBox property like so:

let vaseHeight = vaseNode.boundingBox.max.y - vaseNode.boundingBox.min.y or glassesNode.position.z = faceNode.boundingBox.max.z * 3 / 4

The problem is that doesn't exist with Objective-c and I can't find anything to replace it?

I was able to find this method

- (BOOL)getBoundingBoxMin:(SCNVector3 *)min 
                      max:(SCNVector3 *)max;

but it returns a bool and how I can know the min and max, that's what I'm trying to find?

CodePudding user response：

The Swift property is returning a tuple. The Objective-C method has two out-parameters.

getBoundingBoxMin:max: is the correct method. The two parameters are populated as a result of the call. The BOOL return value indicates whether the node has a non-zero volume or not.

SCNVector3 min;
SCNVector3 max;
CGFloat vaseHeight;
if ([vaseNode getBoundingBoxMin:&min max:&max]) {
    // Process min and max here
    vaseHeight = max.y - min.y;
} else {
    // Node has a zero volume
    vaseHeight = 0;
}