[Bf-blender-cvs] [ba262669974] soc-2021-adaptive-cloth: adaptive_cloth: mesh: is vert on seam or boundary

[ishbosamiya]

Commit: ba262669974a53261e7ceb9cdba75dcfa121fca4
Author: ishbosamiya
Date:   Sun Aug 8 18:08:44 2021 +0530
Branches: soc-2021-adaptive-cloth
https://developer.blender.org/rBba262669974a53261e7ceb9cdba75dcfa121fca4

adaptive_cloth: mesh: is vert on seam or boundary

===================================================================

M	source/blender/blenkernel/BKE_cloth_remesh.hh

===================================================================

diff --git a/source/blender/blenkernel/BKE_cloth_remesh.hh b/source/blender/blenkernel/BKE_cloth_remesh.hh
index 7cd5e645e93..feec93f7381 100644
--- a/source/blender/blenkernel/BKE_cloth_remesh.hh
+++ b/source/blender/blenkernel/BKE_cloth_remesh.hh
@@ -2084,6 +2084,78 @@ template<typename END, typename EVD, typename EED, typename EFD> class Mesh {
                     std::move(deleted_faces));
   }
 
+  /**
+   * Seam is the edge in UV space that has only one face.
+   */
+  bool is_vert_on_seam(const Vert<EVD> &vert) const
+  {
+    /* The vert is on a seam if any of it's adjacent edges is on a
+     * seam */
+
+    for (const auto &edge_index : vert.get_edges()) {
+      if (this->is_edge_on_seam(edge_index)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  /**
+   * Easy call when only `vert_index` is available.
+   */
+  bool is_vert_on_seam(VertIndex vert_index) const
+  {
+    const auto &vert = this->get_checked_vert(vert_index);
+    return is_vert_on_seam(vert);
+  }
+
+  /**
+   * Boundary is the set of "3D edges" that have only a single
+   * face. Not all meshes will have a boundary.
+   */
+  bool is_vert_on_boundary(const Vert<EVD> &vert) const
+  {
+    /* The vert is on a seam if any of it's adjacent edges is on a
+     * boundary */
+
+    /* TODO(ish): a simpler check might be to see
+     * vert.get_edges().size() != vert.get_faces().size() */
+
+    for (const auto &edge_index : vert.get_edges()) {
+      if (this->is_edge_on_boundary(edge_index)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  /**
+   * Easy call when only `vert_index` is available.
+   */
+  bool is_vert_on_boundary(VertIndex vert_index) const
+  {
+    const auto &vert = this->get_checked_vert(vert_index);
+    return is_vert_on_boundary(vert);
+  }
+
+  /**
+   * Check both conditions at once
+   */
+  bool is_vert_on_seam_or_boundary(const Vert<EVD> &vert) const
+  {
+    return this->is_vert_on_seam(vert) || this->is_vert_on_boundary(vert);
+  }
+
+  /**
+   * Easy call when only `vert_index` is available.
+   */
+  bool is_vert_on_seam_or_boundary(VertIndex vert) const
+  {
+    return this->is_vert_on_seam(vert) || this->is_vert_on_boundary(vert);
+  }
+
   /**
    * An edge is loose when it doesn't have any faces.
    */