/// <summary>
/// Ensures the mesh data for the renderer is created, and updates it if neccessary
/// </summary>
/// <param name="force">Whether or not to force a full rebuild of the mesh data</param>
/// <returns>True if an initialization occurred, false if it was skipped</returns>
protected bool Initialize(bool force = false)
{
if (m_Positions == null)
{
return(false);
}
var performFullInitialize = force;
// 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
var neededPoints = Mathf.Max((m_Positions.Length * 2) - 1, 0);
if (m_MeshData == null)
{
m_MeshData = new VRLineRendererInternal.MeshChain();
}
if (m_MeshData.reservedElements != neededPoints)
{
m_MeshData.worldSpaceData = useWorldSpace;
m_MeshData.GenerateMesh(gameObject, true, neededPoints);
performFullInitialize = true;
}
if (performFullInitialize == false)
{
return(false);
}
if (neededPoints == 0)
{
return(true);
}
var pointCounter = 0;
var elementCounter = 0;
// Initialize the single starting point
m_MeshData.SetElementSize(elementCounter, m_WidthStart);
m_MeshData.SetElementPosition(elementCounter, ref m_Positions[pointCounter]);
m_MeshData.SetElementColor(elementCounter, ref m_ColorStart);
elementCounter++;
pointCounter++;
float stepSize = 1.0f / Mathf.Max((m_Positions.Length - 1.0f), 1.0f);
float stepPercent = stepSize;
var lastWidth = m_WidthStart;
var lastColor = m_ColorStart;
// Now do the chain
while (pointCounter < m_Positions.Length)
{
var currentWidth = Mathf.Lerp(m_WidthStart, m_WidthEnd, stepPercent);
var currentColor = Color.Lerp(m_ColorStart, m_ColorEnd, stepPercent);
// Create a pipe from the previous point to here
m_MeshData.SetElementSize(elementCounter, lastWidth, currentWidth);
m_MeshData.SetElementPipe(elementCounter, ref m_Positions[pointCounter - 1], ref m_Positions[pointCounter]);
m_MeshData.SetElementColor(elementCounter, ref lastColor, ref currentColor);
elementCounter++;
// Now record our own point data
m_MeshData.SetElementSize(elementCounter, currentWidth);
m_MeshData.SetElementPosition(elementCounter, ref m_Positions[pointCounter]);
m_MeshData.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 += stepSize;
}
// Dirty all the MeshChain flags so everything gets refreshed
m_MeshData.SetMeshDataDirty(VRLineRendererInternal.MeshChain.MeshRefreshFlag.All);
m_MeshNeedsRefreshing = true;
return(true);
}
/// <summary>
/// Ensures the mesh data for the renderer is created, and updates it if neccessary
/// </summary>
/// <param name="force">Whether or not to force a full rebuild of the mesh data</param>
/// <returns>True if an initialization occurred, false if it was skipped</returns>
protected bool Initialize()
{
m_MaxTrailPoints = Mathf.Max(m_MaxTrailPoints, 3);
// If we have a point mismatch, we force this operation
if (m_Points != null && m_MaxTrailPoints == m_Points.Length)
{
return(false);
}
m_Points = new Vector3[m_MaxTrailPoints];
m_PointTimes = new float[m_MaxTrailPoints];
Clear();
if (m_Colors == null || m_Colors.Length == 0)
{
m_Colors = new Color[1];
m_Colors[0] = Color.white;
}
// 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_MeshData == null)
{
m_MeshData = new VRLineRendererInternal.MeshChain();
}
if (m_MeshData.reservedElements != neededPoints)
{
m_MeshData.worldSpaceData = true;
m_MeshData.GenerateMesh(gameObject, true, neededPoints);
if (neededPoints == 0)
{
return(true);
}
var pointCounter = 0;
var elementCounter = 0;
var zeroVec = Vector3.zero;
var zeroColor = new Color(0, 0, 0, 0);
// Initialize everything to 0 so we don't render any trails at first
m_MeshData.SetElementColor(0, ref zeroColor);
while (pointCounter < m_Points.Length)
{
// Start point
m_MeshData.SetElementSize(elementCounter, 0);
m_MeshData.SetElementPosition(elementCounter, ref zeroVec);
elementCounter++;
// Pipe to the next point
m_MeshData.SetElementSize(elementCounter, 0);
m_MeshData.SetElementPipe(elementCounter, ref zeroVec, ref zeroVec);
// Go onto the next point while retaining previous values we might need to lerp between
elementCounter++;
pointCounter++;
}
// Dirty all the MeshChain flags so everything gets refreshed
m_MeshRenderer.enabled = false;
m_MeshData.SetMeshDataDirty(VRLineRendererInternal.MeshChain.MeshRefreshFlag.All);
m_MeshNeedsRefreshing = true;
}
return(true);
}
