private static void ProcessPoints(List <ObjPrimitive> primitiveGroup, IReadOnlyList <VertexInfo> vertexInfo, IReadOnlyList <int> indices)
{
var primitive = new ObjPrimitive(PrimitiveCategory.Point, indices.Count);
primitive.Vertices.AddRange(indices.Select(i => vertexInfo[i]));
primitiveGroup.Add(primitive);
}
private static void ProcessLineList(List <ObjPrimitive> primitiveGroup, IReadOnlyList <VertexInfo> vertexInfo, IReadOnlyList <int> indices)
{
for (int i = 0; i < indices.Count; i += 2)
{
var primitive = new ObjPrimitive(PrimitiveCategory.Line, 2);
primitive.Vertices.Add(vertexInfo[indices[i]]);
primitive.Vertices.Add(vertexInfo[indices[i + 1]]);
primitiveGroup.Add(primitive);
}
}
private static void ProcessTriFan(List <ObjPrimitive> primitiveGroup, IReadOnlyList <VertexInfo> vertexInfo, IReadOnlyList <int> indices)
{
var a = vertexInfo[indices[0]];
var b = vertexInfo[indices[1]];
for (int i = 2; i < indices.Count; ++i)
{
var c = vertexInfo[indices[i]];
var primitive = new ObjPrimitive(PrimitiveCategory.Triangle, 3);
primitive.Vertices.Add(a);
primitive.Vertices.Add(b);
primitive.Vertices.Add(c);
primitiveGroup.Add(primitive);
b = c;
}
}
