Enable and disable Renderer or Canvas not working

Unity Engine
1

Every 5 seconds I need to take a photo and display it in the world. That part is working fine.
Once a photo is taken it need to disappear 1 second after. That’s where I’m stuck.
I’ve gotten it to disappear but then I cant get the new picture to reappear when its function is called again.

Any ideas?

I’ve tried:
m_CanvasRenderer.enabled = false;
m_CanvasRenderer.enabled = true;
m_Canvas = null;
m_Canvas.setActive(false);
m_Canvas.setActive(true);

public class PhotoCaptureExample : MonoBehaviour
{
    GestureRecognizer m_GestureRecognizer;
    GameObject m_Canvas = null;
    Renderer m_CanvasRenderer = null;
    PhotoCapture m_PhotoCaptureObj;
    CameraParameters m_CameraParameters;
    bool m_CapturingPhoto = false;
    Texture2D m_Texture = null;

    void Start()
    {
        Initialize();
        InvokeRepeating("TakePhoto", 5.0f, 5.0f);
        //StartCoroutine(TakePhoto());
    }

void TakePhoto()
    {
        if (m_CapturingPhoto)
        {
            return;
        }
        m_CapturingPhoto = true;
        m_PhotoCaptureObj.TakePhotoAsync(OnPhotoCaptured);
    }

    void OnPhotoCaptured(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)
    {
       // m_CanvasRenderer.enabled = true;
  
        if (m_Canvas == null)
        {
 
            m_Canvas = GameObject.CreatePrimitive(PrimitiveType.Quad);
            m_Canvas.name = "PhotoCaptureCanvas";
            m_CanvasRenderer = m_Canvas.GetComponent<Renderer>() as Renderer;
            m_CanvasRenderer.material = new Material(Shader.Find("AR/HolographicImageBlend"));
        }

        Matrix4x4 cameraToWorldMatrix;
        photoCaptureFrame.TryGetCameraToWorldMatrix(out cameraToWorldMatrix);
        Matrix4x4 worldToCameraMatrix = cameraToWorldMatrix.inverse;

        Matrix4x4 projectionMatrix;
        photoCaptureFrame.TryGetProjectionMatrix(out projectionMatrix);

        photoCaptureFrame.UploadImageDataToTexture(m_Texture);
        m_Texture.wrapMode = TextureWrapMode.Clamp;

        m_CanvasRenderer.sharedMaterial.SetTexture("_MainTex", m_Texture);
        m_CanvasRenderer.sharedMaterial.SetMatrix("_WorldToCameraMatrix", worldToCameraMatrix);
        m_CanvasRenderer.sharedMaterial.SetMatrix("_CameraProjectionMatrix", projectionMatrix);
        m_CanvasRenderer.sharedMaterial.SetFloat("_VignetteScale", 1.0f);

        // Position the canvas object slightly in front
        // of the real world web camera.
        Vector3 position = cameraToWorldMatrix.GetColumn(3) - cameraToWorldMatrix.GetColumn(2);

        // Rotate the canvas object so that it faces the user.
        Quaternion rotation = Quaternion.LookRotation(-cameraToWorldMatrix.GetColumn(2), cameraToWorldMatrix.GetColumn(1));

        m_Canvas.transform.position = position;
        m_Canvas.transform.rotation = rotation;

        m_CapturingPhoto = false;

        float counter = 0; float target = 1;
        while (counter < target)
        {
            counter += Time.deltaTime;
        }
        // m_CanvasRenderer.enabled = false;
     
    }
}
2

First off, I admit though while I grasp the concept of most of your code, it’s over my head.
However, the ability to turn something on/off , visibility-wise should be pretty straight-forward.
Whatever you turned off (renderer/canvas), after the canvas check against null … turn it back on.
One note, though, is that you’re forcing a spin loop waiting for 1 second in your script. That’s a different issue, though.
If you turn on the renderer manually in the inspector on the second time through, is the photo there just invisible?

3

Get the component and just toggle that instead of the actual gameObject.

4

Just a note, when I was reading this post, it appeared as though he was creating a unique “canvas” improv.
I could be wrong or misunderstanding it, but his canvas is a quad…

5

You are correct.

My bad, early mornings…

6

All good… Confused me, too. I sometimes use ‘general’ names like that, but other times I can see how un-nice it can be when you go back/others read it :slight_smile:

7

I’m working in the hololens so I cant turn the renderer on manually in the inspector while running.
I thought it would be strait forward to turning something invisible then visible again.

8

Should be straight forward. Hope you figure it out.