public Area(float x, float y, float width, float height)
{
//conver 0 - 1 to (-1) - 1
x = 2 * x - 1;
y = -2 * y + 1;
width *= 2f;
height *= 2f;
Vector2[] verts = new Vector2[]
{
new Vector2(x, y),
new Vector2(x, y - height),
new Vector2(x + width, y),
new Vector2(x + width, y - height),
};
Vector2[] uvs = new Vector2[]
{
new Vector2(0, 1),
new Vector2(0, 0),
new Vector2(1, 1),
new Vector2(1, 0)
};
Vao = new VAO(verts);
Vao.addAttributeArray(uvs, 2, 1);
}
public static VAO LoadAsVAO(string path)
{
List <Vector3> positions = new List <Vector3>();
List <Vector2> uvs = new List <Vector2>();
List <Vector3> normals = new List <Vector3>();
List <VertexData> verts = new List <VertexData>();
hasUvs = false;
hasNormals = false;
if (!File.Exists(path))
{
throw new FileNotFoundException();
}
string[] lines = File.ReadAllLines(path);
foreach (string str in lines)
{
if (!string.IsNullOrWhiteSpace(str) && str.Length > 2)
{
switch (str.Substring(0, 2))
{
case "v ":
parseVert(str, positions);
break;
case "vt":
parseTexture(str, uvs);
break;
case "vn":
parseNormal(str, normals);
break;
case "f ":
parseFace(str, positions, uvs, normals, verts);
break;
}
}
}
Console.WriteLine("Loaded file {0}, with {1} with vertices", path, verts.Count);
List <Vector3> p = new List <Vector3>();
List <Vector2> u = new List <Vector2>();
List <Vector3> n = new List <Vector3>();
uint[] e = new uint[verts.Count];
Dictionary <VertexData, int> vertices = new Dictionary <VertexData, int>();
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 0; i < verts.Count; i++)
{
if (!vertices.ContainsKey(verts[i]))
{
p.Add(verts[i].position);
u.Add(verts[i].uv);
n.Add(verts[i].normal);
e[i] = (uint)p.Count - 1;
vertices.Add(verts[i], vertices.Count);
}
else
{
e[i] = (uint)vertices[verts[i]];
}
}
watch.Stop();
Console.WriteLine(watch.ElapsedMilliseconds);
VAO vao = new VAO(p.ToArray());
if (hasUvs)
{
vao.addAttributeArray(u.ToArray(), 2, 1);
}
if (hasNormals)
{
vao.addAttributeArray(n.ToArray(), 3, 2);
}
vao.addElementArray(e);
return(vao);
}