Normals Class Reference

A class for computing surface normals. More...

#include <pmp/algorithms/Normals.h>

Static Public Member Functions
static void	compute_vertex_normals (SurfaceMesh &mesh)
	Compute vertex normals for the whole mesh. More...
static void	compute_face_normals (SurfaceMesh &mesh)
	Compute face normals for the whole mesh. More...
static Normal	compute_vertex_normal (const SurfaceMesh &mesh, Vertex v)
	Compute the normal vector of vertex v.
static Normal	compute_face_normal (const SurfaceMesh &mesh, Face f)
	Compute the normal vector of face f. More...
static Normal	compute_corner_normal (const SurfaceMesh &mesh, Halfedge h, Scalar crease_angle)
	Compute the normal vector of the polygon corner specified by the target vertex of halfedge h. More...

Detailed Description

This class provides a set of static functions for computing surface normal information, either

• per vertex: compute_vertex_normal()
• per face: compute_face_normal()
• per corner: compute_corner_normal()

The convenience functions compute_vertex_normals() and compute_face_normals() compute the normals for the whole mesh and add a corresponding vertex or face property.

Member Function Documentation

compute_corner_normal()

Normal compute_corner_normal ( const SurfaceMesh &  mesh, Halfedge  h, Scalar  crease_angle  )

static

Averages incident corner normals if they are within crease_angle of the face normal. crease_angle is in radians, not degrees.

compute_face_normal()

Normal compute_face_normal ( const SurfaceMesh &  mesh, Face  f  )

static

Normal is computed as (normalized) sum of per-corner cross products of the two incident edges. This corresponds to the normalized vector area in [1]

compute_face_normals()

void compute_face_normals ( SurfaceMesh &  mesh )

static

Calls compute_face_normal() for each face and adds a new face property of type Normal named "f:normal".

compute_vertex_normals()

void compute_vertex_normals ( SurfaceMesh &  mesh )

static

Calls compute_vertex_normal() for each vertex and adds a new vertex property of type Normal named "v:normal".