public static SceneHL ToHiddenLineScene(this Scene scene, Camera camera)
{
var cameraFrame = camera.Frame.Inverse();
var dict = new Dictionary <Triangle, TriangleHL>();
scene.Bodies.ForEach(body => ConvertTrianglesOfBody(body, dict, cameraFrame, camera.NearPlane));
var trianglesHL = dict.Values.Where(triangle => triangle.Spin == TriangleSpin.counter_clockwise).ToArray();
var edgesHL = scene.Bodies.SelectMany(body => body.ConvertToEdgeHL(dict, cameraFrame)).FilterOutBorderEdges().ToArray();
var sceneHL = new SceneHL
{
NearPlaneDistance = camera.NearPlane,
Edges = edgesHL,
Triangles = trianglesHL
};
return(sceneHL);
}
public static IEnumerable <LineHL> FilterOutHiddenLines(this IEnumerable <LineHL> lines, SceneHL scene)
{
var nearPlaneDistance = scene.NearPlaneDistance;
var triangles = scene.Triangles;
var visibleLines = lines.AsParallel().Where(line => IsLineVisible(line, scene.NearPlaneDistance, triangles)).ToList();
return(visibleLines);
}