public static Mesh MakeWallQuad()
{
Vector3 v1 = new Vector3(-0.5f, 0.5f, 0);
Vector3 v2 = new Vector3(-0.5f, -0.5f, 0);
Vector3 v3 = new Vector3(0.5f, 0.5f, 0);
Vector3 v4 = new Vector3(0.5f, -0.5f, 0);
float[] vertices =
{
v1.X, v1.Y, v1.Z,
v2.X, v2.Y, v2.Z,
v3.X, v3.Y, v3.Z,
v4.X, v4.Y, v4.Z
};
Vector3 n = Vector3.Cross((v2 - v1), (v3 - v1)).Normalized();
float[] normals =
{
n.X, n.Y, n.Z,
n.X, n.Y, n.Z,
n.X, n.Y, n.Z,
n.X, n.Y, n.Z
};
float[] uvs =
{
0, 1,
0, 0,
1, 1,
1, 0
};
Mesh.VertexData vertexData = new Mesh.VertexData();
vertexData.Vertices = new List <float>(vertices);
vertexData.Uvs = new List <float>(uvs);
vertexData.Normals = new List <float>(normals);
Mesh quad = new Mesh(vertexData, OpenTK.Graphics.OpenGL.PrimitiveType.TriangleStrip);
return(quad);
}
public static Mesh MakeQuadLineStrip()
{
Vector3 v1 = new Vector3(-0.5f, 0.5f, 0);
Vector3 v2 = new Vector3(-0.5f, -0.5f, 0);
Vector3 v3 = new Vector3(0.5f, 0.5f, 0);
Vector3 v4 = new Vector3(0.5f, -0.5f, 0);
float[] vertices =
{
v1.X, v1.Y, v1.Z,
v2.X, v2.Y, v2.Z,
v4.X, v4.Y, v4.Z,
v3.X, v3.Y, v3.Z,
v1.X, v1.Y, v1.Z
};
Mesh.VertexData vertexData = new Mesh.VertexData();
vertexData.Vertices = new List <float>(vertices);
Mesh quad = new Mesh(vertexData, OpenTK.Graphics.OpenGL.PrimitiveType.LineStrip);
return(quad);
}