private void stepSimulation()
{
_simTime += Time.deltaTime * simulationSpeed;
while (_simTime > _currState.simTime)
{
_prevState.CopyFrom(_currState);
_currState.Step();
}
if (OnUpdateSystem != null)
{
OnUpdateSystem();
}
}
private void updateTrails()
{
int stepsTaken = 0;
while (_cometPathState.frames < (_currState.frames + _cometPathLength))
{
_cometPathState.Step();
stepsTaken++;
for (int i = 0; i < _cometPaths.Length; i++)
{
_cometPaths[i].Enqueue(_cometPathState.comets[i].position);
while (_cometPaths[i].Count > _cometPathLength)
{
_cometPaths[i].Dequeue();
}
}
if (stepsTaken >= _maxPathStepsPerFrame)
{
break;
}
}
if (_cometPathState.frames - _currState.frames >= _cometPathLength)
{
using (new ProfilerSample("Build Comet Paths")) {
_tempVerts.Clear();
_tempLines.Clear();
using (new ProfilerSample("Build Vertex List")) {
for (int i = 0; i < _cometPaths.Length; i++)
{
int index = 0;
foreach (var point in _cometPaths[i])
{
if (index != 0)
{
_tempLines.Add(_tempVerts.Count);
_tempLines.Add(_tempVerts.Count - 1);
}
_tempVerts.Add(point);
_tempColors.Add(_cometPathGradient.Evaluate(index / (_cometPaths[i].Count - 1.0f)) * Color.white);
index++;
}
}
}
int[] indexArray;
using (new ProfilerSample("Build Index Array")) {
int goalLength = Mathf.NextPowerOfTwo(_tempLines.Count);
if (!_trailIndexCache.TryGetValue(goalLength, out indexArray))
{
indexArray = new int[goalLength];
_trailIndexCache[goalLength] = indexArray;
}
for (int i = 0; i < _tempLines.Count; i++)
{
indexArray[i] = _tempLines[i];
}
for (int i = _tempLines.Count; i < goalLength; i++)
{
indexArray[i] = 0;
}
}
using (new ProfilerSample("Upload Mesh")) {
_cometPathMesh.Clear();
_cometPathMesh.SetVertices(_tempVerts);
_cometPathMesh.SetColors(_tempColors);
_cometPathMesh.SetIndices(indexArray, MeshTopology.Lines, 0);
_tempVerts.Clear();
_tempLines.Clear();
_tempColors.Clear();
}
}
}
Graphics.DrawMesh(_cometPathMesh, _displayAnchor.localToWorldMatrix, _cometPathMaterial, 0);
}