Chapter 9 ThirdPersonCamera Thread error

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1

Hello,

I am trying to implement the ThirdPersonCamera in Chapter 9. When I run the program, it automatically crashes and I get the following error: Thread 1: EXC_BAD_ACCESS (code=EXC_I386_GPFLT) on the line rotation.y = focus.rotation.y in the override for viewMatrix.

Any help would be appreciated. Thanks!

2

So, it seems that this crash is related to the same crash with ArcballCamera. Here’s my work around for it

override var viewMatrix: float4x4 {
    position = focus.position - focusDistance * focus.forwardVector
    position.y = focusHeight
    let y = focus.rotation.y
    let x = rotation.x
    rotation = [x, y, 0]
    return super.viewMatrix
}
3

Yes, unfortunately this appeared with a recent release of Xcode. I’m glad you found the fix.

4

@albertk Thank you for sharing your solution - much appreciated!