/// <summary>
/// Returns a position on the spline at the given percentage.
/// </summary>
public Vector3 GetPosition(float percentage, bool evenDistribution = true, int distributionSteps = 100)
{
//evaluate curve:
CurveDetail curveDetail = GetCurve(percentage);
//avoid an error in editor usage where this index can be -1:
if (curveDetail.currentCurve < 0)
{
return(Vector3.zero);
}
SplineAnchor startAnchor = Anchors[curveDetail.currentCurve];
SplineAnchor endAnchor = Anchors[curveDetail.currentCurve + 1];
return(BezierCurves.GetPoint(startAnchor.Anchor.position, endAnchor.Anchor.position, startAnchor.OutTangent.position, endAnchor.InTangent.position, curveDetail.currentCurvePercentage, evenDistribution, distributionSteps));
}
/// <summary>
/// Returns a facing vector at the given percentage along the spline to allow content to properly orient along the spline.
/// </summary>
public Vector3 GetDirection(float percentage)
{
//get direction:
CurveDetail curveDetail = GetCurve(percentage);
//avoid an error in editor usage where this index can be -1:
if (curveDetail.currentCurve < 0)
{
return(Vector3.zero);
}
SplineAnchor startAnchor = Anchors[curveDetail.currentCurve];
SplineAnchor endAnchor = Anchors[curveDetail.currentCurve + 1];
return(BezierCurves.GetFirstDerivative(startAnchor.Anchor.position, endAnchor.Anchor.position, startAnchor.OutTangent.position, endAnchor.InTangent.position, curveDetail.currentCurvePercentage).normalized);
}
static void DrawTools(Transform target)
{
Spline spline = target.GetComponent <Spline> ();
if (spline == null)
{
return;
}
if (target.transform.childCount == 0)
{
return;
}
//set primary draw color:
Handles.color = spline.SecondaryColor;
for (int i = 0; i < spline.Anchors.Length; i++)
{
//refs:
Quaternion lookRotation = Quaternion.identity;
SplineAnchor currentAnchor = spline.Anchors[i];
//scale geometry:
currentAnchor.InTangent.localScale = Vector3.one * (spline.toolScale * 1.3f);
currentAnchor.OutTangent.localScale = Vector3.one * (spline.toolScale * 1.3f);
currentAnchor.Anchor.localScale = Vector3.one * (spline.toolScale * 2.1f);
if (spline.toolScale > 0)
{
//draw persistent identifiers that face the scene view camera and only draw if the corrosponding tangent is active:
if (currentAnchor.OutTangent.gameObject.activeSelf)
{
//connection:
Handles.DrawDottedLine(currentAnchor.Anchor.position, currentAnchor.OutTangent.position, 3);
//indicators:
if (SceneView.currentDrawingSceneView != null)
{
lookRotation = Quaternion.LookRotation((SceneView.currentDrawingSceneView.camera.transform.position - currentAnchor.OutTangent.position).normalized);
Handles.CircleHandleCap(0, currentAnchor.OutTangent.position, lookRotation, spline.toolScale * .65f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.OutTangent.position, lookRotation, spline.toolScale * .25f, EventType.Repaint);
}
}
if (currentAnchor.InTangent.gameObject.activeSelf)
{
//connection:
Handles.DrawDottedLine(currentAnchor.Anchor.position, currentAnchor.InTangent.position, 3);
//indicators:
if (SceneView.currentDrawingSceneView != null)
{
lookRotation = Quaternion.LookRotation((SceneView.currentDrawingSceneView.camera.transform.position - currentAnchor.InTangent.position).normalized);
Handles.CircleHandleCap(0, currentAnchor.InTangent.position, lookRotation, spline.toolScale * .65f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.InTangent.position, lookRotation, spline.toolScale * .25f, EventType.Repaint);
}
}
//anchor tools:
if (SceneView.currentDrawingSceneView != null)
{
lookRotation = Quaternion.LookRotation((SceneView.currentDrawingSceneView.camera.transform.position - currentAnchor.Anchor.position).normalized);
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale, EventType.Repaint);
}
//identify path origin:
if (spline.direction == SplineDirection.Forward && i == 0 || spline.direction == SplineDirection.Backwards && i == spline.Anchors.Length - 1)
{
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale * .8f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale * .75f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale * .5f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale * .45f, EventType.Repaint);
Handles.CircleHandleCap(0, currentAnchor.Anchor.position, lookRotation, spline.toolScale * .25f, EventType.Repaint);
}
}
}
//draw spline:
for (int i = 0; i < spline.Anchors.Length - 1; i++)
{
SplineAnchor startAnchor = spline.Anchors[i];
SplineAnchor endAnchor = spline.Anchors[i + 1];
Handles.DrawBezier(startAnchor.Anchor.position, endAnchor.Anchor.position, startAnchor.OutTangent.position, endAnchor.InTangent.position, spline.color, null, 2);
}
}
/// <summary>
/// Makes a spline longer.
/// </summary>
public GameObject[] AddAnchors(int count)
{
//refs:
GameObject anchorTemplate = Resources.Load("Anchor") as GameObject;
//if we have no anchors let's make sure we create a spline segment and not just a single anchor:
if (Anchors.Length == 0)
{
count = 2;
}
//create return array:
GameObject[] returnObjects = new GameObject[count];
for (int i = 0; i < count; i++)
{
//previous anchor refs:
Transform previousPreviousAnchor = null;
Transform previousAnchor = null;
if (Anchors.Length == 1)
{
previousPreviousAnchor = transform;
previousAnchor = Anchors[0].transform;
}
else if (Anchors.Length > 1)
{
previousPreviousAnchor = Anchors[Anchors.Length - 2].transform;
previousAnchor = Anchors[Anchors.Length - 1].transform;
}
//create a new anchor:
GameObject newAnchor = Instantiate <GameObject>(anchorTemplate);
newAnchor.name = newAnchor.name.Replace("(Clone)", "");
SplineAnchor anchor = newAnchor.GetComponent <SplineAnchor>();
anchor.tangentMode = defaultTangentMode;
newAnchor.transform.parent = transform;
newAnchor.transform.rotation = Quaternion.LookRotation(transform.forward);
//tilt tangents for variety as we add new anchors:
//anchor.Tilt (new Vector3 (0, 0, 0));
anchor.InTangent.Translate(Vector3.up * .5f);
anchor.OutTangent.Translate(Vector3.up * -.5f);
//position new anchor:
if (previousPreviousAnchor != null && previousAnchor != null)
{
//determine direction for next placement:
Vector3 direction = (previousAnchor.position - previousPreviousAnchor.position).normalized;
if (direction == Vector3.zero)
{
direction = transform.forward;
}
//place from the previous anchor in the correct direction:
newAnchor.transform.position = previousAnchor.transform.position + (direction * 1.5f);
}
else
{
newAnchor.transform.localPosition = Vector3.zero;
}
//catalog this new anchor for return:
returnObjects[i] = newAnchor;
}
return(returnObjects);
}