// Find all the meshes in passed Displayable and add them to the lists indexed by their material
// mesh hashes.
private void MapMaterialsAndMeshes(BScene pBs, BInstance pInst, Displayable disp)
{
RenderableMeshGroup rmg = disp.renderable as RenderableMeshGroup;
if (rmg != null)
{
foreach (RenderableMesh rMesh in rmg.meshes)
{
InvertedMesh imesh = new InvertedMesh(pBs, pInst, disp, rmg, rMesh);
BHash meshHash = rMesh.mesh.GetBHash();
if (!sharedMeshes.ContainsKey(meshHash))
{
sharedMeshes.Add(meshHash, new List <InvertedMesh>());
}
sharedMeshes[meshHash].Add(imesh);
BHash materialHash = rMesh.material.GetBHash();
if (!meshByMaterial.ContainsKey(materialHash))
{
meshByMaterial.Add(materialHash, new List <InvertedMesh>());
}
meshByMaterial[materialHash].Add(imesh);
}
}
foreach (Displayable child in disp.children)
{
MapMaterialsAndMeshes(pBs, pInst, child);
}
}
// Given a list of meshes, combine them into one mesh and return a containing BInstance.
private BInstance CreateOneInstanceFromMeshes(BHash materialHash, List <InvertedMesh> meshes)
{
// Pick one of the meshes to be the 'root' mesh.
// Someday may need to find the most center mesh to work from.
InvertedMesh rootIMesh = meshes.First();
// The new instance will be at the location of the root mesh with no rotation
BInstance inst = new BInstance();
inst.Position = rootIMesh.containingInstance.Position;
inst.Rotation = OMV.Quaternion.Identity;
inst.coordAxis = rootIMesh.containingInstance.coordAxis;
try {
// The mesh we're going to build
MeshInfo meshInfo = new MeshInfo();
foreach (InvertedMesh imesh in meshes)
{
int indicesBase = meshInfo.vertexs.Count;
// Go through the mesh, map all vertices to global coordinates then convert relative to root
meshInfo.vertexs.AddRange(imesh.renderableMesh.mesh.vertexs.Select(vert => {
OMVR.Vertex newVert = new OMVR.Vertex();
OMV.Vector3 worldPos = vert.Position;
worldPos = worldPos * imesh.containingDisplayable.offsetRotation
+ imesh.containingDisplayable.offsetPosition;
worldPos = worldPos * imesh.containingInstance.Rotation
+ imesh.containingInstance.Position;
// Make new vert relative to the BInstance it's being added to
newVert.Position = worldPos - inst.Position;
newVert.Normal = vert.Normal
* imesh.containingDisplayable.offsetRotation
* imesh.containingInstance.Rotation;
newVert.TexCoord = vert.TexCoord;
return(newVert);
}));
meshInfo.indices.AddRange(imesh.renderableMesh.mesh.indices.Select(ind => ind + indicesBase));
}
RenderableMesh newMesh = new RenderableMesh();
newMesh.num = 0;
newMesh.material = rootIMesh.renderableMesh.material; // The material we share
newMesh.mesh = meshInfo;
RenderableMeshGroup meshGroup = new RenderableMeshGroup();
meshGroup.meshes.Add(newMesh);
Displayable displayable = new Displayable(meshGroup);
displayable.name = "combinedMaterialMeshes-" + materialHash.ToString();
inst.Representation = displayable;
}
catch (Exception e) {
ConvOAR.Globals.log.ErrorFormat("{0} CreateInstanceFromSharedMaterialMeshes: exception: {1}", _logHeader, e);
}
return(inst);
}
// Add another level of parenting
public InvertedMesh AddDisplayableLevel(InvertedMesh imesh, Displayable pDisp, DisplayableRenderable pDispRend)
{
InvertedMesh newIMesh = new InvertedMesh(imesh.containingScene, imesh.containingInstance,
imesh.containingDisplayable, imesh.containingDisplayableRenderable, imesh.renderableMesh);
globalPosition += pDisp.offsetPosition;
globalRotation *= pDisp.offsetRotation;
newIMesh.containingDisplayable = pDisp;
newIMesh.containingDisplayableRenderable = pDispRend;
return(newIMesh);
}
// Creates Instances for the shared messes in this list and also takes the meshes out of 'meshByMaterial'.
// Current algorithm: create one instance and add all shared meshes as children.
// When the instances are created (or copied over), the meshes must be removed from the
// 'meshByMaterial' structure so they are not combined with other material sharing meshes.
private List <BInstance> CreateInstancesForSharedMeshes(List <InvertedMesh> meshList)
{
List <BInstance> ret = new List <BInstance>();
BInstance inst = new BInstance();
InvertedMesh rootMesh = meshList.First();
inst.Position = rootMesh.globalPosition;
inst.Rotation = OMV.Quaternion.Identity;
// Create Displayable for each identical mesh (so we can keep the pos and rot.
// Take the root mesh out of the list and use it as the representation
List <Displayable> repackagedMeshes = PackMeshesIntoDisplayables(meshList, inst.Position,
imesh => "sharedMesh-" + imesh.renderableMesh.mesh.GetBHash().ToString() + "-" + imesh.renderableMesh.GetBHash().ToString());
Displayable rootDisplayable = repackagedMeshes.First();
repackagedMeshes.RemoveAt(0);
inst.Representation = rootDisplayable;
rootDisplayable.children = repackagedMeshes;
ret.Add(inst);
return(ret);
}
