Camera.ViewportToScreenPoint

Description

Transforms position from viewport space into screen space.

Viewport space is normalized and relative to the camera. The bottom-left of the camera is (0,0); the top-right is (1,1). The z position is in world units from the camera.

Screenspace is defined in pixels. The bottom-left of the screen is (0,0); the right-top is (pixelWidth,pixelHeight). The z position is in world units from the camera.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Draw an image based on normalized view coordinates
    // rather than pixel positions.
    Texture2D bottomPanel;

    void VPToScreenPtExample()
    {
        var origin = Camera.main.ViewportToScreenPoint(new Vector3(0.25f, 0.1f, 0));
        var extent = Camera.main.ViewportToScreenPoint(new Vector3(0.5f, 0.2f, 0));

        GUI.DrawTexture(new Rect(origin.x, origin.y, extent.x, extent.y), bottomPanel);
    }
}