Hello,
My application works fine, 100% expected results with Canvas set on ScreenSpace-Overlay. I have written a function that takes an array of integers and based on its values it dynamically builds vertical bars inside a panel. I have an UI-Image as a prefab and that I instantiated multiple time, set its anchor to bottom left position and increase the x-offset from that point in increments of its width+padding. Everything works fine, check the screenshots.
I have now a fancy idea of animating the vertical bars… to have Unity Particle Effects on the top of each bar and to play it. From what I searched… you cannot get Particle Effects working on Canvas-UI unless the Canvas is set as ScreenSpace-Camera. I managed to obtain success with Particle Effects and ScreenSpace-Camera canvas… everything works… but now the same code that dynamically builds the UI doesnt work anymore… the vertical bars are set on a total new position outside the UI.
My code:
private void ArrangeImagesOnCanvas(List<int> varArray)
{
Canvas canvas = FindObjectOfType<Canvas>();
//float h = canvas.GetComponent<RectTransform>().rect.height * canvas.GetComponent<RectTransform>().localScale.y;
//float w = canvas.GetComponent<RectTransform>().rect.width * canvas.GetComponent<RectTransform>().localScale.x;
float h = _panelImageForSortingAlgorithm.GetComponent<RectTransform>().rect.height * canvas.GetComponent<RectTransform>().localScale.y;
float w = _panelImageForSortingAlgorithm.GetComponent<RectTransform>().rect.width * canvas.GetComponent<RectTransform>().localScale.x;
float minH = 20.0f;
float maxH = h - 20;
int minList = varArray.Min();
int maxList = varArray.Max();
_imageWidth = (w - (varArray.Count * _PADDING)) / varArray.Count;
List<float> heightsList = new List<float>();
float _tempFloat = 0;
for (int i = 0; i < varArray.Count; i++)
{
_tempFloat = ScaleIntervals(varArray[i], new Vector2(minList, maxList), new Vector2(minH, maxH));
heightsList.Add(_tempFloat);
}
for(int i = 0; i<_instancesOfImages.Count;i++)
{
Destroy(_instancesOfImages[i]);
}
_instancesOfImages.Clear();
for (int i = 0; i < varArray.Count; i++)
{
GameObject instantiatedImage = Instantiate(_imageToInstance, _imageToInstance.transform.position, Quaternion.identity);
instantiatedImage.transform.SetParent(_panelImageForSortingAlgorithm.transform);
Image img = instantiatedImage.GetComponent<Image>();
img.rectTransform.anchorMin = new Vector2(0, 0);
img.rectTransform.anchorMax = new Vector2(0, 0);
img.rectTransform.pivot = new Vector2(0, 0);
img.rectTransform.position = new Vector3(i * (_imageWidth + _PADDING), 0, 0);
img.rectTransform.sizeDelta = new Vector2(_imageWidth, heightsList[i]);
_instancesOfImages.Add(instantiatedImage);
}
}
For the same code the vertical bars can be seen in Forum3.png image… if I put
float w = _panelImageForSortingAlgorithm.GetComponent<RectTransform>().rect.width;```
then the vertical bars are like in Forum4.png image.
How can I position correctly the vertical bars as in ScreenSpace-Overlay but this time to be on ScreenSpace-Camera ? Please help or give me some advices or tips...
