void Start()
{
// Get all needed components and interconnect them:
rope = GetComponent <ObiRope>();
path = GetComponent <ObiCurve>();
rope.Solver = solver;
rope.ropePath = path;
//rope.section = section;
GetComponent <MeshRenderer>().material = material;
// Calculate rope start/end and direction in local space:
Vector3 localStart = transform.InverseTransformPoint(start.position);
Vector3 localEnd = transform.InverseTransformPoint(end.position);
Vector3 direction = (localEnd - localStart).normalized;
// Generate rope path:
path.controlPoints.Clear();
path.controlPoints.Add(new ObiCurve.ControlPoint(localStart - direction, Vector3.up));
path.controlPoints.Add(new ObiCurve.ControlPoint(localStart, Vector3.up));
path.controlPoints.Add(new ObiCurve.ControlPoint(localEnd, Vector3.up));
path.controlPoints.Add(new ObiCurve.ControlPoint(localEnd + direction, Vector3.up));
// Setup the simulation:
StartCoroutine(Setup());
}
static void CreateObiRope()
{
GameObject c = new GameObject("Obi Rope");
Undo.RegisterCreatedObjectUndo(c, "Create Obi Rope");
ObiRope rope = c.AddComponent <ObiRope>();
ObiCurve path = c.AddComponent <ObiCurve>();
ObiSolver solver = c.AddComponent <ObiSolver>();
c.AddComponent <ObiRopeExtrudedRenderer>();
rope.Solver = solver;
rope.ropePath = path;
}
public static void DrawSplineGizmos(ObiCurve curve, int resolution, Color color, Color culledColor, Color orientationColor, bool drawOrientation = true)
{
if (curve == null || curve.GetNumSpans() == 0)
{
return;
}
Matrix4x4 prevMatrix = Handles.matrix;
UnityEngine.Rendering.CompareFunction oldZTest = Handles.zTest;
Color oldColor = Handles.color;
Handles.matrix = curve.transform.localToWorldMatrix;
Handles.color = orientationColor;
// Draw the curve:
int curveSegments = curve.GetNumSpans() * resolution;
Vector3[] samples = new Vector3[curveSegments + 1];
for (int i = 0; i <= curveSegments; ++i)
{
float mu = i / (float)curveSegments;
samples[i] = curve.GetPositionAt(mu);
if (drawOrientation)
{
Vector3 right = Vector3.Cross(curve.GetFirstDerivativeAt(mu), curve.GetNormalAt(mu)).normalized;
Vector3 direction = Vector3.Cross(right, curve.GetFirstDerivativeAt(mu)).normalized;
Handles.DrawLine(samples[i], samples[i] + direction * 0.075f);
}
}
Handles.color = color;
Handles.zTest = UnityEngine.Rendering.CompareFunction.LessEqual;
Handles.DrawPolyLine(samples);
Handles.color = culledColor;
Handles.zTest = UnityEngine.Rendering.CompareFunction.Greater;
Handles.DrawPolyLine(samples);
Handles.color = oldColor;
Handles.matrix = prevMatrix;
Handles.zTest = oldZTest;
}
public static float ScreenPointToCurveMu(ObiCurve curve, Vector2 screenPoint, int samples = 30)
{
if (curve.controlPoints.Count >= curve.MinPoints)
{
samples = Mathf.Max(1, samples);
float step = 1 / (float)samples;
float closestMu = 0;
float minDistance = float.MaxValue;
Matrix4x4 l2w = curve.transform.localToWorldMatrix;
for (int k = 0; k < curve.GetNumSpans(); ++k)
{
Vector3 _p = l2w.MultiplyPoint3x4(curve.controlPoints[k].position);
Vector3 p = l2w.MultiplyPoint3x4(curve.controlPoints[k].GetOutTangent());
Vector3 p_ = l2w.MultiplyPoint3x4(curve.controlPoints[(k + 1) % curve.controlPoints.Count].GetInTangent());
Vector3 p__ = l2w.MultiplyPoint3x4(curve.controlPoints[(k + 1) % curve.controlPoints.Count].position);
Vector2 lastPoint = HandleUtility.WorldToGUIPoint(curve.Evaluate3D(_p, p, p_, p__, 0));
for (int i = 1; i <= samples; ++i)
{
Vector2 currentPoint = HandleUtility.WorldToGUIPoint(curve.Evaluate3D(_p, p, p_, p__, i * step));
float mu;
float distance = Vector2.SqrMagnitude((Vector2)ObiUtils.ProjectPointLine(screenPoint, lastPoint, currentPoint, out mu) - screenPoint);
if (distance < minDistance)
{
minDistance = distance;
closestMu = (k + (i - 1) * step + mu / samples) / (float)curve.GetNumSpans();
}
lastPoint = currentPoint;
}
}
return(closestMu);
}
else
{
Debug.LogWarning("Curve needs at least 2 control points to be defined.");
}
return(0);
}
private static void DrawGizmosNonSelected(ObiCurve spline, GizmoType gizmoType)
{
ObiEditorCurveDrawing.DrawSplineGizmos(spline, 30, new Color(1, 1, 1, 0.5f), new Color(1, 0, 0, 0.5f), Color.white, false);
}
public void OnEnable()
{
spline = (ObiCurve)target;
selectedStatus = new bool[spline.controlPoints.Count];
ResizeCPArrays();
}
