public void OnSceneGUI()
{
// make sure we detect any changes in the object
GUI.changed = false;
Limiter limits = target as Limiter;
// Don't show limits if the node is disabled.
if (!limits.enabled)
{
return;
}
float minRange = limits.m_minimumRange;
float maxRange = limits.m_maximumRange;
if (!limits.m_limitRange)
{
Renderer[] renderObjects = limits.GetComponentsInChildren <Renderer>();
Bounds bounds = renderObjects[0].bounds;
for (int i = 1; i < renderObjects.Length; ++i)
{
bounds.Encapsulate(renderObjects[i].bounds);
}
minRange = bounds.size.magnitude * 1.5f;
maxRange = minRange * 2.5f;
}
Matrix4x4 handlesMatrix = Handles.matrix;
Handles.matrix = limits.transform.localToWorldMatrix;
// ignore scaling on the matrix;
Vector3 scale = limits.transform.localScale;
Vector3 invScale = new Vector3(1.0f / scale.x, 1.0f / scale.y, 1.0f / scale.z);
Handles.matrix = Handles.matrix * Matrix4x4.Scale(invScale);
Quaternion leftRotation = Quaternion.Euler(0.0f, limits.m_minimumHorizontalAngle, 0.0f);
Quaternion rightRotation = Quaternion.Euler(0.0f, limits.m_maximumHorizontalAngle, 0.0f);
Quaternion downRotation = Quaternion.Euler(-limits.m_minimumVerticalAngle, 0.0f, 0.0f);
Quaternion upRotation = Quaternion.Euler(-limits.m_maximumVerticalAngle, 0.0f, 0.0f);
Quaternion midRotoation = Quaternion.Euler((limits.m_maximumVerticalAngle + limits.m_minimumVerticalAngle) * -0.5f, 0.0f, 0.0f);
Vector3 leftNormal = leftRotation * Vector3.right;
Vector3 rightNormal = rightRotation * Vector3.right;
Vector3 tm = upRotation * Vector3.forward;
Vector3 tl = leftRotation * tm;
Vector3 tr = rightRotation * tm;
Vector3 bm = downRotation * Vector3.forward;
Vector3 bl = leftRotation * bm;
Vector3 br = rightRotation * bm;
Vector3 tc = Vector3.up * Mathf.Sin(limits.m_maximumVerticalAngle * Mathf.Deg2Rad);
Vector3 ts = leftRotation * Vector3.forward;
Vector3 bc = Vector3.up * Mathf.Sin(limits.m_minimumVerticalAngle * Mathf.Deg2Rad);
float horizArc = limits.m_maximumHorizontalAngle - limits.m_minimumHorizontalAngle;
float vertArc = limits.m_maximumVerticalAngle - limits.m_minimumVerticalAngle;
// Draw the arcs
Handles.DrawWireArc(Vector3.zero, leftNormal, bl, -vertArc, maxRange);
Handles.DrawWireArc(Vector3.zero, rightNormal, br, -vertArc, maxRange);
Handles.DrawWireArc(Vector3.zero + tc * maxRange
, Vector3.up
, ts
, horizArc
, maxRange * Mathf.Cos(limits.m_maximumVerticalAngle * Mathf.Deg2Rad));
Handles.DrawWireArc(Vector3.zero + bc * maxRange
, Vector3.up
, ts
, horizArc
, maxRange * Mathf.Cos(limits.m_minimumVerticalAngle * Mathf.Deg2Rad));
Handles.DrawWireArc(Vector3.zero, leftNormal, bl, -vertArc, minRange);
Handles.DrawWireArc(Vector3.zero, rightNormal, br, -vertArc, minRange);
Handles.DrawWireArc(Vector3.zero + tc * minRange
, Vector3.up
, ts
, horizArc
, minRange * Mathf.Cos(limits.m_maximumVerticalAngle * Mathf.Deg2Rad));
Handles.DrawWireArc(Vector3.zero + bc * minRange
, Vector3.up
, ts
, horizArc
, minRange * Mathf.Cos(limits.m_minimumVerticalAngle * Mathf.Deg2Rad));
Handles.DrawLine(minRange * tl, maxRange * tl);
Handles.DrawLine(minRange * bl, maxRange * bl);
Handles.DrawLine(minRange * tr, maxRange * tr);
Handles.DrawLine(minRange * br, maxRange * br);
if (limits.m_limitRange)
{
Handles.DrawWireArc(Vector3.zero, Vector3.right, bm, -vertArc, minRange);
Handles.DrawWireArc(Vector3.zero, Vector3.right, bm, -vertArc, maxRange);
// Range sliders
Vector3 centre = Quaternion.Euler((limits.m_minimumVerticalAngle + limits.m_maximumVerticalAngle) * -0.5f, 0.0f, 0.0f) * Vector3.forward;
limits.m_maximumRange = Mathf.Max(Handles.Slider(limits.m_maximumRange * centre, centre).magnitude, limits.m_minimumRange);
limits.m_minimumRange = Mathf.Min(Handles.Slider(limits.m_minimumRange * centre, centre).magnitude, limits.m_maximumRange);
}
// angle sliders
float midRange = (minRange + maxRange) * 0.5f;
Vector3 horizCentre = Vector3.Dot(midRotoation * (Vector3.forward * midRange), Vector3.up) * Vector3.up;
StoreOriginalAngles(limits);
limits.m_minimumHorizontalAngle = NewHandles.AngleControl(horizCentre, Vector3.up, Vector3.forward, limits.m_minimumHorizontalAngle, midRange, NewHandles.DoubleArrowCap, true);
limits.m_maximumHorizontalAngle = NewHandles.AngleControl(horizCentre, Vector3.up, Vector3.forward, limits.m_maximumHorizontalAngle, midRange, NewHandles.DoubleArrowCap, false);
limits.m_minimumVerticalAngle = -NewHandles.AngleControl(Vector3.zero, Vector3.right, Vector3.forward, -limits.m_minimumVerticalAngle, maxRange, NewHandles.DoubleArrowCap, true);
limits.m_maximumVerticalAngle = -NewHandles.AngleControl(Vector3.zero, Vector3.right, Vector3.forward, -limits.m_maximumVerticalAngle, maxRange, NewHandles.DoubleArrowCap, true);
// Apply limits to the angles
LimitAngles(limits);
Handles.matrix = handlesMatrix;
// report any changes in the object.
if (GUI.changed)
{
EditorUtility.SetDirty(limits);
}
}