public static List<Mesh3d> LoadSceneFromObj(string objfile, string mtlfile, float scale = 1.0f)
{
string[] lines = File.ReadAllLines(objfile);
var objs = ParseOBJString(lines);
var mtllib = LoadMaterialsFromMtl(mtlfile);
List<Mesh3d> meshes = new List<Mesh3d>();
Dictionary<string, GenericMaterial> texCache = new Dictionary<string, GenericMaterial>();
Dictionary<Color, GenericMaterial> colorCache = new Dictionary<Color, GenericMaterial>();
Dictionary<GenericMaterial, MaterialInfo> mInfos = new Dictionary<GenericMaterial, MaterialInfo>();
Dictionary<GenericMaterial, List<Object3dInfo>> linkCache = new Dictionary<GenericMaterial, List<Object3dInfo>>();
var colorPink = new GenericMaterial(Color.Pink);
mInfos = new Dictionary<GenericMaterial, MaterialInfo>();
foreach(var obj in objs)
{
var mat = mtllib.ContainsKey(obj.MaterialName) ? mtllib[obj.MaterialName] : null;
GenericMaterial material = null;
if(mat != null && mat.TextureName.Length > 0)
{
if(texCache.ContainsKey(mat.TextureName + mat.AlphaMask))
{
material = texCache[mat.TextureName + mat.AlphaMask];
mInfos[material] = mat;
}
else
{
var m = GenericMaterial.FromMedia(Path.GetFileName(mat.TextureName));
m.NormalMapScale = 10;
material = m;
mInfos[material] = mat;
texCache.Add(mat.TextureName + mat.AlphaMask, material);
// material = colorPink;
}
//material = new GenericMaterial(Color.Pink);
}
else if(mat != null)
{
if(colorCache.ContainsKey(mat.DiffuseColor))
{
material = colorCache[mat.DiffuseColor];
mInfos[material] = mat;
}
else
{
material = new GenericMaterial(Color.White);
mInfos[material] = mat;
colorCache.Add(mat.DiffuseColor, material);
}
}
else
{
material = colorPink;
mInfos[material] = mat;
}
for(int i = 0; i < obj.VBO.Count; i += 8)
{
obj.VBO[i] *= scale;
obj.VBO[i + 1] *= scale;
obj.VBO[i + 2] *= scale;
}
var o3di = new Object3dInfo(obj.VBO, obj.Indices);
if(!linkCache.ContainsKey(material))
linkCache.Add(material, new List<Object3dInfo> { o3di });
else
linkCache[material].Add(o3di);
}
foreach(var kv in linkCache)
{
Object3dInfo o3di = kv.Value[0];
if(kv.Value.Count > 1)
{
foreach(var e in kv.Value.Skip(1))
o3di.Append(e);
}
var trans = o3di.GetAverageTranslationFromZero();
o3di.OriginToCenter();
//o3di.CorrectFacesByNormals();
// o3di.CorrectFacesByNormals();
Mesh3d mesh = new Mesh3d(o3di, kv.Key);
kv.Key.SpecularComponent = 1.0f - mInfos[kv.Key].SpecularStrength + 0.01f;
kv.Key.Roughness = (mInfos[kv.Key].SpecularStrength);
kv.Key.ReflectionStrength = 1.0f - (mInfos[kv.Key].SpecularStrength);
kv.Key.DiffuseComponent = mInfos[kv.Key].DiffuseColor.GetBrightness() + 0.01f;
if(mInfos[kv.Key].AlphaMask.Length > 1)
(kv.Key as GenericMaterial).SetAlphaMaskFromMedia(mInfos[kv.Key].AlphaMask);
if(mInfos[kv.Key].BumpMapName.Length > 1)
((GenericMaterial)kv.Key).SetBumpMapFromMedia(mInfos[kv.Key].BumpMapName);
// mesh.SpecularComponent = kv.Key.SpecularStrength;
mesh.Transformation.Translate(trans);
// mesh.SetCollisionShape(o3di.GetConvexHull(mesh.Transformation.GetPosition(), 1.0f, 1.0f));
meshes.Add(mesh);
}
return meshes;
}
