/// <summary>
/// Add data for the stroke object to the LivePolyMeshObject. Later, when the stroke
/// is modified, we'll use its modified callback to update the stroke data keyed by
/// this stroke - see onStrokeModified.
/// </summary>
private void addStrokePolygonData(KeyedPolyMeshObject polyMeshObj,
StrokeObject strokeObj,
List <Vector3> strokeMeshPositions,
List <Polygon> strokeMeshPolygons,
List <Edge> strokeSmoothEdges,
List <Color> strokeColors)
{
polyMeshObj.AddDataFor(strokeObj, strokeMeshPositions,
strokeMeshPolygons,
strokeSmoothEdges,
strokeColors);
// TODO: This counting is hacky and not-robust :(
foreach (var polygon in strokeMeshPolygons)
{
addedTriangleCount += (polygon.Count - 2) * 2; // double-sided means twice as
// many triangles.
}
}
/// <summary>
/// Called when a stroke is modified, this method updates the polygons in the
/// stroke's associated LivePolyMeshObject with the polygons that define the newly
/// modified stroke.
/// </summary>
private void onStrokeModified(StrokeObject strokeObj)
{
using (new ProfilerSample("StrokePolyMeshManager: onStrokeModified")) {
KeyedPolyMeshObject polyMeshObj;
if (!_strokeMeshes.TryGetValue(strokeObj, out polyMeshObj))
{
throw new System.InvalidOperationException(
"No LivePolyMeshObject found for stroke: " + strokeObj);
}
PolyMesh polyMesh;
var curStrokePosIndices = Pool <List <int> > .Spawn();
curStrokePosIndices.Clear();
var curStrokePolyIndices = Pool <List <int> > .Spawn();
curStrokePolyIndices.Clear();
KeyedPolyMeshObject.NotifyPolyMeshModifiedAction modificationsFinishedCallback;
try {
// Begin our modification of the data in the PolyMesh for this Stroke.
polyMeshObj.ModifyDataFor(strokeObj,
out polyMesh,
curStrokePosIndices,
curStrokePolyIndices,
out modificationsFinishedCallback);
var newStrokeMeshPolygons = Pool <List <Polygon> > .Spawn();
newStrokeMeshPolygons.Clear();
var newStrokeMeshPositions = Pool <List <Vector3> > .Spawn();
newStrokeMeshPositions.Clear();
var newStrokeSmoothEdges = Pool <List <Edge> > .Spawn();
newStrokeSmoothEdges.Clear();
var newStrokeColors = Pool <List <Color> > .Spawn();
newStrokeColors.Clear();
var addedStrokeMeshPositionIndices = Pool <List <int> > .Spawn();
addedStrokeMeshPositionIndices.Clear();
var addedStrokeMeshPolygonIndices = Pool <List <int> > .Spawn();
addedStrokeMeshPolygonIndices.Clear();
var finalPositionIndices = Pool <List <int> > .Spawn();
finalPositionIndices.Clear();
try {
using (new ProfilerSample("getStrokePolygons")) {
// Get polygon data for the entirety of the stroke.
// TODO: _Removing_ smooth edges is not supported.
polyMesher.FillPolyMeshData(strokeObj,
newStrokeMeshPositions,
newStrokeMeshPolygons,
newStrokeSmoothEdges,
newStrokeColors);
}
var hasColors = newStrokeColors != null && newStrokeColors.Count > 0;
using (new ProfilerSample("Add/modify PolyMesh stroke positions")) {
// Re-use existing position indices or add new ones to fit the modified
// stroke.
// Also take care of vertex colors here, because those always match the
// positions.
for (int i = 0; i < newStrokeMeshPositions.Count; i++)
{
int existingPositionIdx = -1;
if (i < curStrokePosIndices.Count)
{
existingPositionIdx = curStrokePosIndices[i];
}
if (existingPositionIdx != -1)
{
// Modify the position at the existing position index.
polyMesh.SetPosition(existingPositionIdx, newStrokeMeshPositions[i]);
if (hasColors)
{
polyMesh.SetColor(existingPositionIdx, newStrokeColors[i]);
}
// Remember what this position index wound up being; the polygons of
// the stroke need to re-index into the final position index list.
finalPositionIndices.Add(existingPositionIdx);
}
else
{
// Add the position and remember the added position index.
int addedPositionIdx;
polyMesh.AddPosition(newStrokeMeshPositions[i], out addedPositionIdx);
addedStrokeMeshPositionIndices.Add(addedPositionIdx);
if (hasColors)
{
polyMesh.AddColor(newStrokeColors[i]);
}
// Remember what this position index wound up being.
finalPositionIndices.Add(addedPositionIdx);
}
}
}
using (new ProfilerSample("Add/modify PolyMesh stroke polygons")) {
// Re-use existing polygon indices or add new ones to fit the modified
// stroke.
for (int i = 0; i < newStrokeMeshPolygons.Count; i++)
{
// First, re-index the polygon to refer to the final position indices of
// the mesh. We constructed this list during the Add Positions step above.
var newStrokeMeshPolygon = newStrokeMeshPolygons[i];
for (int v = 0; v < newStrokeMeshPolygon.verts.Count; v++)
{
newStrokeMeshPolygon.verts[v]
= finalPositionIndices[newStrokeMeshPolygon.verts[v]];
}
int existingPolygonIdx = -1;
if (i < curStrokePolyIndices.Count)
{
existingPolygonIdx = curStrokePolyIndices[i];
}
if (existingPolygonIdx != -1)
{
// Modify the polygon at the existing position index.
Polygon replacedPolygon;
polyMesh.SetPolygon(existingPolygonIdx, newStrokeMeshPolygon,
out replacedPolygon);
// (Add the vertex index list of the replaced polygon back to its pool.)
replacedPolygon.RecycleVerts();
}
else
{
// Add the polygon and remember the added polygon index.
int addedPolygonIdx;
polyMesh.AddPolygon(newStrokeMeshPolygon, out addedPolygonIdx);
addedTriangleCount += (newStrokeMeshPolygon.Count - 2) * 2;
// (double-sided tris, also TODO: this is SUPER HACKY D: )
addedStrokeMeshPolygonIndices.Add(addedPolygonIdx);
}
}
}
using (new ProfilerSample("Mark new PolyMesh edges smooth")) {
foreach (var newStrokeSmoothEdge in newStrokeSmoothEdges)
{
// Re-index the edge to refer to final positions in the PolyMesh.
var finalSmoothEdge = new Edge(finalPositionIndices[newStrokeSmoothEdge.a],
finalPositionIndices[newStrokeSmoothEdge.b]);
polyMesh.MarkEdgeSmooth(finalSmoothEdge);
}
}
using (new ProfilerSample("Call modifications-finished callback")) {
// Notify that we've finished modifying the keyed object (the stroke object),
// and include any new positions or polygons we may have added to do so.
modificationsFinishedCallback(strokeObj,
addedStrokeMeshPositionIndices,
addedStrokeMeshPolygonIndices);
}
}
finally {
newStrokeMeshPolygons.Clear();
Pool <List <Polygon> > .Recycle(newStrokeMeshPolygons);
newStrokeMeshPolygons.Clear();
Pool <List <Vector3> > .Recycle(newStrokeMeshPositions);
newStrokeSmoothEdges.Clear();
Pool <List <Edge> > .Recycle(newStrokeSmoothEdges);
addedStrokeMeshPositionIndices.Clear();
Pool <List <int> > .Recycle(addedStrokeMeshPositionIndices);
addedStrokeMeshPolygonIndices.Clear();
Pool <List <int> > .Recycle(addedStrokeMeshPolygonIndices);
finalPositionIndices.Clear();
Pool <List <int> > .Recycle(finalPositionIndices);
}
}
finally {
curStrokePolyIndices.Clear();
Pool <List <int> > .Recycle(curStrokePolyIndices);
curStrokePosIndices.Clear();
Pool <List <int> > .Recycle(curStrokePosIndices);
}
}
}
private void finalizeStroke()
{
_curStrokeObject = null;
}
private void initStroke()
{
_curStrokeObject = Instantiate(outputStrokeObjectPrefab);
_curStrokeObject.transform.parent = outputParentObject;
}