Getting the xy coordinates of a clicked pixel on a 3d model

Question

Hi everyone, is it possible to get the x/y coordinates of a pixel on a model from where you click on it? for example, let's say I have a low-rez texture on a flat plane, generated through code, measuring perhaps 16x16 pixels, and I click on the 3rd pixel from the left and the 10th pixel from the top. is there a way for unity to know those coordinates, so that I can use them, for example, to appear in the console?

Answer 1

In Update() would work. You'll want to check if the mouse has been clicked with, say, Input.GetMouseButtonDown(0).

modelWasClicked was added under the assumption that Captain_Dando might end up processing the clicked coords after the if statement. Jessy's right in saying it's a bad idea to use that, you're better off putting whatever click-handling code inside that if statement:

 Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 RaycastHit hit;
 Vector2 clickedUvCoords; //will be set to where the user clicked on the model, in UV (texture) coordinates
 Collider someCollider; //could just be this GameObject's collider, assign whatever you need
 if (someCollider.Raycast(ray,hit,Mathf.Infinity)) {
     clickedUvCoords = hit.textureCoord;
     //your click-handling code here
 }
 //don't do anything after here that assumes the model's been clicked, unless you have a "return;" at the end of the above if statement, or wrap it in an "else {}"

Getting the xy coordinates of a clicked pixel on a 3d model

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