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INeatFreak/UnityEditor.Handles.DrawCameraOrientedSphere.cs

Created July 12, 2022 11:12
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  1. INeatFreak created this gist Jul 12, 2022.
    23 changes: 23 additions & 0 deletions UnityEditor.Handles.DrawCameraOrientedSphere.cs
    View file
    Original file line number Diff line number Diff line change
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    void DrawCameraOrientedWireSphere(Vector3 position, float radius, Color color) {
    UnityEditor.Handles.matrix = Matrix4x4.TRS(Vector3.zero, transform.rotation, Vector3.one);
    UnityEditor.Handles.color = color;

    UnityEditor.Handles.DrawWireDisc(position, Vector3.right, radius);
    UnityEditor.Handles.DrawWireDisc(position, Vector3.up, radius);
    UnityEditor.Handles.DrawWireDisc(position, Vector3.forward, radius);

    if(Camera.current.orthographic) {
    Vector3 normal = position - UnityEditor.Handles.inverseMatrix.MultiplyVector(Camera.current.transform.forward);
    float sqrMagnitude = normal.sqrMagnitude;
    float num0 = radius * radius;
    UnityEditor.Handles.DrawWireDisc(position - num0 * normal / sqrMagnitude, normal, radius);
    } else {
    Vector3 normal = position - UnityEditor.Handles.inverseMatrix.MultiplyPoint(Camera.current.transform.position);
    float sqrMagnitude = normal.sqrMagnitude;
    float num0 = radius * radius;
    float num1 = num0 * num0 / sqrMagnitude;
    float num2 = Mathf.Sqrt(num0 - num1);
    UnityEditor.Handles.DrawWireDisc(position - num0 * normal / sqrMagnitude, normal, num2);
    }
    }