/// Compute corner normals based on polygon normal and point location attributes
/// Results are stored in internally stored attribute map named "corner_normals".
public void SmoothNormalize(
string cornerAttribute,
string polygonAttribute,
float maxSmoothingAngleRadians
)
{
var cornerAttributes = CornerAttributes.FindOrCreate <Vector3>(cornerAttribute /*"corner_normals"*/);
var polygonAttributes = PolygonAttributes.Find <Vector3>(polygonAttribute /*"polygon_normals"*/);
var polygonNormals = PolygonAttributes.Find <Vector3>("polygon_normals");
float cosMaxSmoothingAngle = (float)System.Math.Cos((double)maxSmoothingAngleRadians);
cornerAttributes.Clear();
foreach (Polygon polygon in Polygons)
{
if (maxSmoothingAngleRadians == 0)
{
polygon.CopyToCorners(
cornerAttributes,
polygonAttributes
);
}
else
{
polygon.SmoothNormalize(
cornerAttributes,
polygonAttributes,
polygonNormals,
cosMaxSmoothingAngle
);
}
}
}
public Vector3 ComputePointNormal(Point point)
{
var polygonNormals = PolygonAttributes.Find <Vector3>("polygon_normals");
Vector3 normalSum = new Vector3(0.0f, 0.0f, 0.0f);
foreach (Corner corner in point.Corners)
{
normalSum += polygonNormals[corner.Polygon];
}
Vector3 averageNormal = normalSum / (float)point.Corners.Count;
return(averageNormal);
}
public void ComputePointNormals(string mapName)
{
var pointNormals = PointAttributes.FindOrCreate <Vector3>(mapName);
var polygonNormals = PolygonAttributes.Find <Vector3>("polygon_normals");
pointNormals.Clear();
foreach (Point point in Points)
{
Vector3 normalSum = new Vector3(0.0f, 0.0f, 0.0f);
foreach (Corner corner in point.Corners)
{
normalSum += polygonNormals[corner.Polygon];
}
Vector3 averageNormal = normalSum / (float)point.Corners.Count;
pointNormals[point] = averageNormal;
}
}