void LateUpdate()
{
Vector3 position = transform.position;
float now = Time.time;
// Remove old sections
while (sections.Count > 0 && now > sections[sections.Count - 1].time + time)
{
sections.RemoveAt(sections.Count - 1);
}
// Add a new trail section to beginning of array
if (sections.Count == 0 || (sections[0].point - position).sqrMagnitude > minDistance * minDistance)
{
ExtrudedTrailSection section = new ExtrudedTrailSection();
section.point = position;
section.matrix = transform.localToWorldMatrix;
section.time = now;
sections.Insert(0, section);
// print(sections.Count);
}
// We need at least 2 sections to create the line
if (sections.Count < 2)
{
return;
}
Matrix4x4 worldToLocal = transform.worldToLocalMatrix;
Matrix4x4[] finalSections = new Matrix4x4[sections.Count];
for (int i = 0; i < sections.Count; i++)
{
finalSections[i] = worldToLocal * sections[i].matrix;
}
// Rebuild the extrusion mesh
MeshExtrusion.ExtrudeMesh(srcMesh, GetComponent <MeshFilter>().mesh, finalSections, precomputedEdges, invertFaces, buildCaps);
//
GetComponent <MeshFilter>().mesh.RecalculateTangents();
}
// Update is called once per frame
void LateUpdate()
{
var position = transform.position;
var now = Time.time;
while (sections.Count > 0 && now > sections [sections.Count - 1].time + time)
{
sections.RemoveAt(0);
}
// Add a new trail section to beginning of array
if (sections.Count == 0 || (sections[0].point - position).sqrMagnitude > minDistance * minDistance)
{
ExtrudedTrailSection section = new ExtrudedTrailSection();
section.point = position;
section.matrix = transform.localToWorldMatrix;
section.time = now;
sections.Insert(0, section);
}
if (sections.Count < 2)
{
return;
}
worldToLocal = transform.worldToLocalMatrix;
finalSections = new Matrix4x4[sections.Count];
for (int i = 0; i < sections.Count; i++)
{
if (autoCalculateOrientation)
{
if (i == 0)
{
direction = sections[0].point - sections[1].point;
rotation = Quaternion.LookRotation(direction, Vector3.up);
previousRotation = rotation;
finalSections[i] = worldToLocal * Matrix4x4.TRS(position, rotation, Vector3.one);
}
// all elements get the direction by looking up the next section
else if (i != sections.Count - 1)
{
direction = sections[i].point - sections[i + 1].point;
rotation = Quaternion.LookRotation(direction, Vector3.up);
angle = Quaternion.Angle(previousRotation, rotation);
// When the angle of the rotation compared to the last segment is too high
// smooth the rotation a little bit. Optimally we would smooth the entire sections array.
if (angle > 20)
{
rotation = Quaternion.Slerp(previousRotation, rotation, .5f);
}
previousRotation = rotation;
finalSections[i] = worldToLocal * Matrix4x4.TRS(sections[i].point, rotation, Vector3.one);
}
// except the last one, which just copies the previous one
else
{
finalSections[i] = finalSections[i - 1];
}
}
else
{
if (i == 0)
{
finalSections[i] = Matrix4x4.identity;
}
else
{
finalSections[i] = worldToLocal * sections[i].matrix;
}
}
}
MeshExtrusion.ExtrudeMesh(srcMesh, GetComponent <MeshFilter> ().mesh, finalSections, precomputedEdges, invertFaces);
}
