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HandleUtility.DistanceToCone

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Declaration

public static float DistanceToCone(Vector3 position, Quaternion rotation, float size);

Parameters

position Position of the cone.
rotation Rotation of the cone.
size Size of the cone.

Returns

float Distance from mouse to cone in pixels.

Description

Returns the distance in pixels from the mouse pointer to a cone.

Calculates the screen space distance from the mouse pointer to a cone at given world space position with the given rotation and size.

Returns zero when mouse pointer is directly over the cone.

Uses the current camera to determine the distance.

using UnityEngine;
using UnityEditor;

public class ExampleScript : MonoBehaviour
{
}

// Displays cone in scene view, and distance from mouse
// to the cone.
[CustomEditor(typeof(ExampleScript))]
public class ExampleEditor : Editor
{
    public void OnSceneGUI()
    {
        var t = target as ExampleScript;
        var tr = t.transform;
        var position = tr.position;
        var rotation = tr.rotation;
        var size = 1.0f;
        // draw a cone in scene
        Handles.color = Color.yellow;
        Handles.ConeHandleCap(0, position, rotation, size, Event.current.type);
        // calculate distance from mouse to cone, and display it
        var distance = HandleUtility.DistanceToCone(position, rotation, size);
        GUI.color = Color.black;
        Handles.Label(position, distance.ToString("F0"));
        // make scene view repaint on mouse move
        if (Event.current.type == EventType.MouseMove)
            Event.current.Use();
    }
}

.

See Also: DistanceToCircle, DistanceToCube, DistanceToLine.

Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.

Copyright ©2022 Unity Technologies. Publication Date: 2022-04-04.
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