/// <summary>
/// compute offset meshes as simple extrusions
/// </summary>
void compute_offset_meshes_nosdf()
{
if (cached_inner_sdf_offset != inner_offset)
{
InnerOffsetMesh = new DMesh3(cachedInputMesh);
MeshTransforms.FromFrame(InnerOffsetMesh, cachedInputsTransform);
MeshNormals.QuickCompute(InnerOffsetMesh);
MeshTransforms.VertexNormalOffset(InnerOffsetMesh, inner_offset);
Reducer reducer = new Reducer(InnerOffsetMesh);
reducer.ReduceToTriangleCount(5000);
InnerOffsetMeshSpatial = new DMeshAABBTree3(InnerOffsetMesh, true);
cached_inner_sdf_offset = inner_offset;
}
double max_offset = inner_offset + thickness;
if (cached_outer_sdf_offset != max_offset)
{
OuterOffsetMesh = new DMesh3(cachedInputMesh);
MeshTransforms.FromFrame(OuterOffsetMesh, cachedInputsTransform);
MeshNormals.QuickCompute(OuterOffsetMesh);
MeshTransforms.VertexNormalOffset(OuterOffsetMesh, max_offset);
Reducer reducer = new Reducer(OuterOffsetMesh);
reducer.ReduceToTriangleCount(5000);
OuterOffsetMeshSpatial = new DMeshAABBTree3(OuterOffsetMesh, true);
cached_outer_sdf_offset = max_offset;
}
//Util.WriteDebugMesh(MeshSource.GetIMesh(), "c:\\scratch\\__OFFESTS_orig.obj");
//Util.WriteDebugMesh(InnerOffsetMesh, "c:\\scratch\\__OFFESTS_inner.obj");
//Util.WriteDebugMesh(OuterOffsetMesh, "c:\\scratch\\__OFFESTS_outer.obj");
}
// update visible triangles for this chunk
void update_triangles(OrderedChunk chunk, float max_scalar)
{
if (chunk.mesh == null)
{
chunk.mesh = new MeshChunk();
}
int count = 0;
foreach (int idx in chunk.order_range)
{
if (tri_ordering[idx].scalar < max_scalar)
{
count++;
}
}
// if we have the same count, we can keep it
if (chunk.mesh.current_count == count)
{
chunk.mesh.submesh.SetVisible(true);
return;
}
// find subset triangles
int[] triangles = new int[count];
for (int k = 0; k < count; ++k)
{
int idx = chunk.order_range.a + k;
triangles[k] = tri_ordering[idx].tid;
}
// find submesh
// [TODO] faster variant of this? Also could be computing these in background...
DSubmesh3 submesh = new DSubmesh3(Mesh, triangles);
MeshTransforms.VertexNormalOffset(submesh.SubMesh, NormalOffsetDistance);
fMesh umesh = UnityUtil.DMeshToUnityMesh(submesh.SubMesh, false);
// create or update GO
if (chunk.mesh.submesh == null)
{
chunk.mesh.submesh = new fMeshGameObject(umesh, true, false);
if (ChunkMeshMaterial != null)
{
chunk.mesh.submesh.SetMaterial(ChunkMeshMaterial);
}
if (ChunkMeshParent != null)
{
ChunkMeshParent.AddChild(chunk.mesh.submesh, false);
}
}
else
{
chunk.mesh.submesh.UpdateMesh(umesh, true, false);
}
chunk.mesh.submesh.SetVisible(true);
chunk.mesh.current_count = count;
}