protected override void AddTransformedPoint(Vector3 transformedPoint, float u, float v)
{
if (!_requests.ContainsKey(CurrentTextureID))
{
_requests.Add(CurrentTextureID, new List <VertexBufferElement>());
}
_requests[CurrentTextureID].Add(VertexBufferElement.New()
.Position(transformedPoint)
.Color(CurrentColor)
.TextureUV(u, v)
.Normal(Vector3.Zero)
.Build());
}
public VertexBufferObject(int textureID, VertexBufferElement[] vertices, short[] elements)
{
_disposed = false;
EnableStates();
_textureID = textureID;
_vertices = vertices;
_elements = elements;
_stride = BlittableValueType.StrideOf(vertices);
LoadData();
}
/// <remarks>
/// Based on the algorithm described here: http://www.opengl.org/wiki/Calculating_a_Surface_Normal
/// </remarks>
private void CalculateNormals(VertexBufferElement[] vertices)
{
for (var n = 0; n < vertices.Length; n += PointsPerPrimitive)
{
var i1 = n + 0;
var i2 = n + 1;
var i3 = n + 2;
//var i4 = n + 3;
var p1 = vertices[i1].Position;
var p2 = vertices[i2].Position;
var p3 = vertices[i3].Position;
var U = p2 - p1;
var V = p3 - p1;
var normal = Vector3.Cross(U, V);
for (var p = 0; p < PointsPerPrimitive; p++)
{
vertices[n + p].Normal = normal;
}
}
}
