/// <summary>
/// Creates or updates the underlying mesh data
/// </summary>
protected override void Initialize(bool setMesh = true)
{
base.Initialize(setMesh);
m_MaxTrailPoints = Mathf.Max(m_MaxTrailPoints, 3);
// If we already have the right amount of points and mesh, then we can get away with just clearing the curve out
if (m_Points != null && m_MaxTrailPoints == m_Points.Length && m_XRMeshData != null)
{
Clear();
return;
}
m_Points = new Vector3[m_MaxTrailPoints];
m_PointTimes = new float[m_MaxTrailPoints];
// For a trail renderer we assume one big chain
// We need a control point for each billboard and a control point for each pipe connecting them together
// We make this a circular trail so the update logic is easier. This gives us (position * 2)
var neededPoints = Mathf.Max((m_MaxTrailPoints * 2), 0);
if (m_XRMeshData == null)
{
m_XRMeshData = new XRMeshChain();
}
if (m_XRMeshData.reservedElements != neededPoints)
{
m_XRMeshData.worldSpaceData = true;
m_XRMeshData.centerAtRoot = true;
m_XRMeshData.GenerateMesh(gameObject, true, neededPoints, setMesh);
if (neededPoints == 0)
{
return;
}
// Dirty all the VRMeshChain flags so everything gets refreshed
m_MeshRenderer.enabled = false;
m_XRMeshData.SetMeshDataDirty(XRMeshChain.MeshRefreshFlag.All);
m_MeshNeedsRefreshing = true;
}
Clear();
}
/// <summary>
/// Creates or updates the underlying mesh data
/// </summary>
protected override void Initialize(bool setMesh = true)
{
base.Initialize();
CopyWorldSpaceDataFromMaterial();
if (m_Positions == null)
{
m_Positions = new Vector3[0];
}
// For a line renderer we assume one big chain
// We need a control point for each billboard and a control point for each pipe connecting them together
// Except for the end, which must be capped with another billboard. This gives us (positions * 2) - 1
// If we're looping, then we do need one more pipe
var neededPoints = m_Loop ? 1 : 0;
neededPoints = Mathf.Max(neededPoints + (m_Positions.Length * 2) - 1, 0);
if (m_XRMeshData == null)
{
m_XRMeshData = new XRMeshChain();
}
if (m_XRMeshData.reservedElements != neededPoints)
{
m_XRMeshData.worldSpaceData = useWorldSpace;
m_XRMeshData.GenerateMesh(gameObject, true, neededPoints, setMesh);
}
// If we have no points, then just assume that stepping through a single point would take us through the whole line
if (neededPoints == 0)
{
m_StepSize = 1.0f;
return;
}
m_StepSize = 1.0f / Mathf.Max(m_Loop ? m_Positions.Length : m_Positions.Length - 1, 1.0f);
var pointCounter = 0;
var elementCounter = 0;
var stepPercent = 0.0f;
var lastColor = m_Color.Evaluate(stepPercent);
var lastWidth = m_WidthCurve.Evaluate(stepPercent) * m_Width;
// Initialize the single starting point
m_XRMeshData.SetElementSize(elementCounter, lastWidth);
m_XRMeshData.SetElementPosition(elementCounter, ref m_Positions[pointCounter]);
m_XRMeshData.SetElementColor(elementCounter, ref lastColor);
elementCounter++;
pointCounter++;
stepPercent += m_StepSize;
// Now do the chain
while (pointCounter < m_Positions.Length)
{
var currentWidth = m_WidthCurve.Evaluate(stepPercent) * m_Width;
var currentColor = m_Color.Evaluate(stepPercent);
// Create a pipe from the previous point to here
m_XRMeshData.SetElementSize(elementCounter, lastWidth, currentWidth);
m_XRMeshData.SetElementPipe(elementCounter, ref m_Positions[pointCounter - 1], ref m_Positions[pointCounter]);
m_XRMeshData.SetElementColor(elementCounter, ref lastColor, ref currentColor);
elementCounter++;
// Now record our own point data
m_XRMeshData.SetElementSize(elementCounter, currentWidth);
m_XRMeshData.SetElementPosition(elementCounter, ref m_Positions[pointCounter]);
m_XRMeshData.SetElementColor(elementCounter, ref currentColor);
// Go onto the next point while retaining previous values we might need to lerp between
lastWidth = currentWidth;
lastColor = currentColor;
elementCounter++;
pointCounter++;
stepPercent += m_StepSize;
}
if (m_Loop)
{
var currentWidth = m_WidthCurve.Evaluate(stepPercent) * m_Width;
var currentColor = m_Color.Evaluate(stepPercent);
m_XRMeshData.SetElementSize(elementCounter, lastWidth, currentWidth);
m_XRMeshData.SetElementPipe(elementCounter, ref m_Positions[pointCounter - 1], ref m_Positions[0]);
m_XRMeshData.SetElementColor(elementCounter, ref lastColor, ref currentColor);
}
// Dirty all the VRMeshChain flags so everything gets refreshed
m_XRMeshData.SetMeshDataDirty(XRMeshChain.MeshRefreshFlag.All);
m_MeshNeedsRefreshing = true;
}
