/// <summary>
/// Draw quad (Must be inside GL_TRIANGLES or GL_LINES for wireframe)
/// </summary>
/// <param name="gl">OpenGL isntance</param>
/// <param name="map">Shared map data</param>
/// <param name="plane">Plane this quad belongs to</param>
/// <param name="planeNormal">Normal vector of the plane</param>
/// <param name="wireframe">Draw as wireframe</param>
public void Draw(SharpGL.OpenGL gl, Powerslave.Map map, Powerslave.Plane plane, Vector3D planeNormal, bool wireframe)
{
List <Powerslave.Vertex> quad = this.Indices.Select(index => map.Vertices[index + plane.VertexStart]).ToList();
if (Vector3D.DotProduct(planeNormal, Quad.GetQuadNormal(quad)) < 0.0f)
{
// Quad is rotated incorrectly, reverse it (might be used as a texture flip)
quad.Reverse();
}
foreach (Powerslave.Vertex point in wireframe ? quad.SelectMany((vertex, index) => new List <Powerslave.Vertex> {
vertex, quad[(index + 1) % quad.Count]
}) : Powerslave.GetTrianglesFromQuad(quad))
{
if (wireframe)
{
gl.Color(1.0f, 1.0f, 1.0f);
}
else
{
Powerslave.SetVertexColor(gl, plane.Flags, point.Lightlevel);
}
gl.Vertex(point.X / 10.0f, point.Z / 10.0f, point.Y / 10.0f);
}
}
/// <summary>
/// Get camera to plane distance
/// </summary>
/// <param name="point">Camera position</param>
/// <param name="plane">Plane definition</param>
/// <param name="map">Shared map data</param>
/// <returns>Plane distance</returns>
private static int GetDistance(Point3D point, Powerslave.Plane plane, Powerslave.Map map)
{
List <Powerslave.Vertex> vertices = plane.PolyVert.Select(vertex => map.Vertices[vertex]).ToList();
Powerslave.Vertex center = new Powerslave.Vertex()
{
X = (short)(vertices.Sum(vertex => vertex.X) / 4), Y = (short)(vertices.Sum(vertex => vertex.Y) / 4), Z = (short)(vertices.Sum(vertex => vertex.Z) / 4)
};
return((int)(Math.Pow(point.X - (center.X / 10.0f), 2) + Math.Pow(point.Y - (center.Z / 10.0f), 2) + Math.Pow(point.Z - (center.Y / 10.0f), 2)));
}
