1 files changed, 53 insertions, 0 deletions
diff --git a/thirdparty/thekla_atlas/nvmesh/param/SingleFaceMap.cpp b/thirdparty/thekla_atlas/nvmesh/param/SingleFaceMap.cpp
new file mode 100644
index 0000000000..4b205de8bf
--- /dev/null
+++ b/thirdparty/thekla_atlas/nvmesh/param/SingleFaceMap.cpp
@@ -0,0 +1,53 @@
+// Copyright NVIDIA Corporation 2008 -- Ignacio Castano <icastano@nvidia.com>
+
+#include "nvmesh.h" // pch
+
+#include "SingleFaceMap.h"
+
+#include "nvmesh/halfedge/Mesh.h"
+#include "nvmesh/halfedge/Vertex.h"
+#include "nvmesh/halfedge/Face.h"
+
+#include "nvmath/Vector.inl"
+
+using namespace nv;
+
+
+
+void nv::computeSingleFaceMap(HalfEdge::Mesh * mesh)
+{
+    nvDebugCheck(mesh != NULL);
+    nvDebugCheck(mesh->faceCount() == 1);
+
+    HalfEdge::Face * face = mesh->faceAt(0);
+    nvCheck(face != NULL);
+
+    Vector3 p0 = face->edge->from()->pos;
+    Vector3 p1 = face->edge->to()->pos;
+
+    Vector3 X = normalizeSafe(p1 - p0, Vector3(0.0f), 0.0f);
+    Vector3 Z = face->normal();
+    Vector3 Y = normalizeSafe(cross(Z, X), Vector3(0.0f), 0.0f);
+
+    uint i = 0;
+    for (HalfEdge::Face::EdgeIterator it(face->edges()); !it.isDone(); it.advance(), i++)
+    {
+        HalfEdge::Vertex * vertex = it.vertex();
+        nvCheck(vertex != NULL);
+
+        if (i == 0)
+        {
+            vertex->tex = Vector2(0);
+        }
+        else
+        {
+            Vector3 pn = vertex->pos;
+
+            float xn = dot((pn - p0), X);
+            float yn = dot((pn - p0), Y);
+
+            vertex->tex = Vector2(xn, yn);
+        }
+    }
+}
+