/**
* Create a textured .obj
* From list of walls generate mesh. From list of cameras generates it texture
* return the path of the .obj created
* //TODO use script https://wiki.unity3d.com/index.php/ExportOBJ#:~:text=Select%20an%20object%20in%20the,OBJ%20file.
*/
public static string Export(List <Camera> cameras, List <GameObject> gos, string objname = "export")
{
// Calculate UV
Debug.Log("Calculate UV");
foreach (GameObject go in gos)
{
TriangleTexture tt = go.GetComponent <TriangleTexture>() ?? go.AddComponent <TriangleTexture>();
tt.CalculateUV(cameras);
}
// Export Mat & Objs
Debug.Log("Export material");
ExportMaterial(objname, cameras);
Debug.Log("Export obj");
return(ExportObjs(objname, gos));
}
private static string ExportOneGameObject(GameObject go, ref int offsetV, ref int offsetVT)
{
Mesh m = go.GetComponent <MeshFilter>().mesh;
TriangleTexture tt = go.GetComponent <TriangleTexture>();
// cube: 6 faces, 36 triangles, 24 vertices
//Debug.Log("vertices: " + m.vertices.Length + " triangles: " + m.triangles.Length + " offsetV:" + offsetV + " offsetVT:" + offsetVT);
string wavefrontV = "";
string wavefrontVT = "";
string wavefrontF = "";
for (int i = 0; i < m.vertices.Length; i++)
{
Vector3 wVertex = go.transform.TransformPoint(m.vertices[i]);
wavefrontV += "v " + wVertex.x + " " + wVertex.y + " " + wVertex.z + " 1.0\n";
}
int vt = 0;
string matname = null;
for (int t = 0; t < m.triangles.Length / 3; t++)
{
TriangleTextureData ttex = tt.vts[t];
int va = m.triangles[t * 3 + 0] + offsetV;
int vb = m.triangles[t * 3 + 1] + offsetV;
int vc = m.triangles[t * 3 + 2] + offsetV;
if (ttex.uvs3 != null)
{
foreach (Vector2 uv in ttex.uvs3) //do not handle when same uv twice (duplicate date) //should group by texture (ttex['cube'] = [])
{
wavefrontVT += "vt " + uv.x + " " + uv.y + " # angle=" + ttex.angle + " distance=" + ttex.distance + "\n";
}
string matnamecur = Path.GetFileNameWithoutExtension(ttex.photo);
if (matname == null || matname != matnamecur)
{
matname = matnamecur;
wavefrontF += "usemtl material_" + matname + "\n";
}
wavefrontF += "f " + (va + 1) + "/" + (offsetVT + vt + 1) + " " + (vb + 1) + "/" + (offsetVT + vt + 2) + " " + (vc + 1) + "/" + (offsetVT + vt + 3) + "\n";
vt += 3;
}
else
{
wavefrontF += "f " + (va + 1) + " " + (vb + 1) + " " + (vc + 1) + "\n";
}
}
offsetV += m.vertices.Length;
offsetVT += vt;
return
("o " + go.name + "\n\n" +
wavefrontV + "\n" +
wavefrontVT + "\n" +
wavefrontF +
"#" + System.DateTime.Now.ToLongDateString() + " " + System.DateTime.Now.ToLongTimeString() + " v=" + m.vertices.Length + "; vt=" + vt + "; f=" + m.triangles.Length + ";" + "\n");
}
