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glModel (.3ds / .obj / Milkshape ascii .txt) Feedback

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damadmax

Betreff des Beitrags:

Verfasst: Mi Mär 05, 2008 18:27

DGL Member

Registriert: Sa Aug 18, 2007 18:47
Beiträge: 694
Wohnort: Köln
Programmiersprache: Java

btw: is there a way to prevent calculation of vertexnormals?

e.g. use only face normal?
ok facenormal only does make sense when there are just triangles used.

edit: ehm, may be i'm wrong, but does it really calculate vertex normals? as far as i understand the source code it seams it just calculates the face normals...

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Und es ward Licht.

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on error goto next

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noeska

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Verfasst: Mi Mär 05, 2008 22:39

DGL Member

Registriert: Di Jul 01, 2003 18:59
Beiträge: 887
Wohnort: (The Netherlands)
Programmiersprache: fpc/delphi/java/c#

You may be right. It was an attempt at creating vertex normals that did not work out as intended.

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damadmax

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Verfasst: Mi Mär 05, 2008 23:46

DGL Member

Registriert: Sa Aug 18, 2007 18:47
Beiträge: 694
Wohnort: Köln
Programmiersprache: Java

im trying to build a kind of tilebased game. i put some tiles into one 3ds file and access them through the mesh number. rendering works well.
tiles are arranged as desired.
tiles are nearly equivalent to cubes. means: same plane on upper side.
so in result some quads are rendered just side by side, giving a rectangular plane.
prob is now, that normals are totally messed when enlighted by standard opengl light.

i tried to comment calcvnormals() out, but i get an access violation o.O

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Spessi

Betreff des Beitrags:

Verfasst: So Apr 27, 2008 17:00

DGL Member

Registriert: Mo Aug 15, 2005 19:29
Beiträge: 38

hey noeska,

can you release an example program for your gl3ds v3.0 alpha?
So many files, I'm lost

Shall I add every single file to the uses?

Greets

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noeska

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Verfasst: Do Jul 10, 2008 11:11

DGL Member

Registriert: Di Jul 01, 2003 18:59
Beiträge: 887
Wohnort: (The Netherlands)
Programmiersprache: fpc/delphi/java/c#

Load and Init a 3d model

Code:

scene1 := TglRender.Create(nil);
scene1.AddModel();
scene1.Models[0].LoadFromFile('models\hog2.txt');
scene1.Models[0].TexturePath:='textures';
scene1.UpdateTextures;

Render the model

Code:

Scene1.AdvanceAnimation;
Scene1.Models[0].Render;

For uses only include those you need:

Code:

glRender,
Model,
ModelMsa;

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http://3das.noeska.com - create adventure games without programming

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Flash

Betreff des Beitrags:

Verfasst: Mo Jan 19, 2009 23:19

Guitar Hero

Registriert: Do Sep 25, 2003 15:56
Beiträge: 7804
Wohnort: Sachsen - ERZ / C
Programmiersprache: Java (, Pascal)

@glModel (Nameswitch):
Ich verstehe deine Idee, hinter der Namensänderung. Allerdings ist das schon ein ganz schon schwerer Schnitt, schließlich kann man "gl3ds" schon fast als Markenname sehen. Du solltest den neuen Namen sehr gut promoten, und darauf hinweisen, dass der Loader bereits seit 2003(?) gepflegt wird.

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Blog: kevin-fleischer.de und fbaingermany.com

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Lord Horazont

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Verfasst: Fr Jan 23, 2009 11:33

DGL Member

Registriert: Do Sep 02, 2004 19:42
Beiträge: 4158
Programmiersprache: FreePascal, C++

Du solltest vielleicht schreiben "glModel (earlier gl3ds)", sodass die leute das Produkt wiedererkennen.

Aber: Weiter so. Ein umfangreicher, flexibler Modelloader für verschiedene Formate hat natürlich was.

Gruß Lord Horazont

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Flash

Betreff des Beitrags:

Verfasst: Fr Jan 23, 2009 16:27

Guitar Hero

Registriert: Do Sep 25, 2003 15:56
Beiträge: 7804
Wohnort: Sachsen - ERZ / C
Programmiersprache: Java (, Pascal)

@Lord: Oder so: TLFKAgl3DS (The Loader formely known as gl3DS)

frei nach T.A.F.K.A.P.

_________________
Blog: kevin-fleischer.de und fbaingermany.com

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Lord Horazont

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Verfasst: Fr Jan 23, 2009 17:23

DGL Member

Registriert: Do Sep 02, 2004 19:42
Beiträge: 4158
Programmiersprache: FreePascal, C++

Hm, ich hätte jetzt eher an den Garfield 2-Film gedacht

Aber lassen wir das...

Gruß Lord Horazont

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noeska

Betreff des Beitrags:

Verfasst: Mi Feb 04, 2009 20:13

DGL Member

Registriert: Di Jul 01, 2003 18:59
Beiträge: 887
Wohnort: (The Netherlands)
Programmiersprache: fpc/delphi/java/c#

To add more to the identity crysis :-)

...

It is also possible to create meshes from scratch (if you know what you are doing)

Code:

 
  //dynamic mesh creation example ...
  scene1.AddModel; //new model
  scene1.Models[1].AddMesh; //new mesh
  scene1.Models[1].AddMaterial;  //new material
  scene1.Models[1].Material[0].DiffuseRed:= 1.0; //make it red
  scene1.Models[1].Material[0].DiffuseBlue:= 0.0;
  scene1.Models[1].Material[0].DiffuseGreen:= 0.0;
  scene1.Models[1].Material[0].AmbientRed:= 0.5; //make it red
  scene1.Models[1].Material[0].IsAmbient:=true;
  scene1.Models[1].Material[0].Name:='RedMat';
 
  scene1.Models[1].Mesh[0].NumVertex := 8; //number of vertexes
  v1.x := -1.0;
  v1.y := -1.0;
  v1.z := -1.0;
  scene1.Models[1].Mesh[0].Vertex[0]:=v1;
  v1.x := -1.0;
  v1.y := -1.0;
  v1.z := 1.0;
  scene1.Models[1].Mesh[0].Vertex[1]:=v1;
  v1.x := -1.0;
  v1.y := 1.0;
  v1.z := -1.0;
  scene1.Models[1].Mesh[0].Vertex[2]:=v1;
  v1.x := -1.0;
  v1.y := 1.0;
  v1.z := 1.0;
  scene1.Models[1].Mesh[0].Vertex[3]:=v1;
  v1.x := 1.0;
  v1.y := -1.0;
  v1.z := -1.0;
  scene1.Models[1].Mesh[0].Vertex[4]:=v1;
  v1.x := 1.0;
  v1.y := -1.0;
  v1.z := 1.0;
  scene1.Models[1].Mesh[0].Vertex[5]:=v1;
  v1.x := 1.0;
  v1.y := 1.0;
  v1.z := -1.0;
  scene1.Models[1].Mesh[0].Vertex[6]:=v1;
  v1.x := 1.0;
  v1.y := 1.0;
  v1.z := 1.0;
  scene1.Models[1].Mesh[0].Vertex[7]:=v1;
 
  scene1.Models[1].Mesh[0].NumVertexIndices := 36; //number of vertex indices
  scene1.Models[1].Mesh[0].Face[0]:=0;
  scene1.Models[1].Mesh[0].Face[1]:=2;
  scene1.Models[1].Mesh[0].Face[2]:=4;
 
  scene1.Models[1].Mesh[0].Face[3]:=4;
  scene1.Models[1].Mesh[0].Face[4]:=2;
  scene1.Models[1].Mesh[0].Face[5]:=6;
 
  scene1.Models[1].Mesh[0].Face[6]:=0;
  scene1.Models[1].Mesh[0].Face[7]:=4;
  scene1.Models[1].Mesh[0].Face[8]:=1;
 
  scene1.Models[1].Mesh[0].Face[9]:=1;
  scene1.Models[1].Mesh[0].Face[10]:=4;
  scene1.Models[1].Mesh[0].Face[11]:=5;
 
  scene1.Models[1].Mesh[0].Face[12]:=0;
  scene1.Models[1].Mesh[0].Face[13]:=1;
  scene1.Models[1].Mesh[0].Face[14]:=2;
 
  scene1.Models[1].Mesh[0].Face[15]:=2;
  scene1.Models[1].Mesh[0].Face[16]:=1;
  scene1.Models[1].Mesh[0].Face[17]:=3;
 
  scene1.Models[1].Mesh[0].Face[18]:=4;
  scene1.Models[1].Mesh[0].Face[19]:=6;
  scene1.Models[1].Mesh[0].Face[20]:=5;
 
  scene1.Models[1].Mesh[0].Face[21]:=5;
  scene1.Models[1].Mesh[0].Face[22]:=6;
  scene1.Models[1].Mesh[0].Face[23]:=7;
 
  scene1.Models[1].Mesh[0].Face[24]:=2;
  scene1.Models[1].Mesh[0].Face[25]:=3;
  scene1.Models[1].Mesh[0].Face[26]:=6;
 
  scene1.Models[1].Mesh[0].Face[27]:=6;
  scene1.Models[1].Mesh[0].Face[28]:=3;
  scene1.Models[1].Mesh[0].Face[29]:=7;
 
  scene1.Models[1].Mesh[0].Face[30]:=1;
  scene1.Models[1].Mesh[0].Face[31]:=5;
  scene1.Models[1].Mesh[0].Face[32]:=3;
 
  scene1.Models[1].Mesh[0].Face[33]:=3;
  scene1.Models[1].Mesh[0].Face[34]:=5;
  scene1.Models[1].Mesh[0].Face[35]:=7;
 
  //apply material
  scene1.Models[1].Mesh[0].MatName[0]:=scene1.Models[1].Material[0].Name;
  scene1.Models[1].Mesh[0].MatID[0]:=0;
 
  //add calculated normals ...
  scene1.Models[1].Mesh[0].NumNormals:=12; //for each face indices div 3
  scene1.Models[1].Mesh[0].NumNormalIndices:=36;
  scene1.Models[1].CalcVnormals;
 
  //add fake texture coords
  scene1.Models[1].Mesh[0].NumMappings:=1;
  scene1.Models[1].Mesh[0].NumMappingIndices:=36;
  map.tu:=0;
  map.tv:=0;
  scene1.Models[1].Mesh[0].Mapping[0]:=map;
  for tel:=0 to 35 do
  begin
    scene1.Models[1].Mesh[0].Map[tel]:=0;
  end;
 
  //make mesh visible
  scene1.Models[1].Mesh[0].Visible:=true;
 
  //calculate size for bounding box
  scene1.Models[1].CalculateSize;
 
  //determine render order even with one mesh
  scene1.Models[1].CalculateRenderOrder;
 
  //save test
  scene1.Models[1].SaveToFile('test.obj');
 

Now this should be more 'programmer' friendly. So feedback is appreciated.

nb: the scene1.Model[1] is one because it is the second model in my test application.

Also normals calculation is once again in a rewrite cycle so you could expect a new release of glModel after some more testing. The new calculation method breaks current loaders that use it.

_________________
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Strecker

Betreff des Beitrags:

Verfasst: Mi Feb 11, 2009 21:28

DGL Member

Registriert: Mi Sep 19, 2007 21:36
Beiträge: 46

i actually appreciate to hear that .. the normals are calculated quite strangely in some spots in my current project and i hope that might change after a rewrite .. but at all .. good thing ^^

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Lumpiluk

Betreff des Beitrags:

Verfasst: Sa Okt 24, 2009 10:59

DGL Member

Registriert: Fr Okt 23, 2009 12:22
Beiträge: 26
Programmiersprache: Delphi(, C++)

If I load a 3ds like this I can't see anything of it:

Code:

  
  //Init
  scene1 := TglRender.Create(nil);
  scene1.AddModel();
  scene1.Models[0].LoadFromFile(extractfilepath(paramstr(0))+'spaceship.3ds');
  scene1.Models[0].TexturePath:=extractfilepath(paramstr(0));
  scene1.UpdateTextures;
  ...
  //Render
  //GlTranslatef(...);
  Scene1.AdvanceAnimation;
  Scene1.Models[0].Render;
  Scene1.Render;
 

But with

Code:

 
  model := TAll3dsMesh.Create(nil);
  model.TexturePath := extractfilepath(paramstr(0));
  model.LoadFromFile(extractfilepath(paramstr(0))+'spaceship.3ds');
 ...
  model.Render
 

it nearly works. I can see my meshes but they're all green (I did not use textures, I only changed the materials).
What do I wrong?

Edit: I noticed that my spaceship gets the color that I set with glcolor3f in a for-loop between another glpushmatrix and glpopmatrix... . If I don't set that color, everything is white.

OK, this problem ist solved now (disabled gl_color_material), but if I now load a 3ds with texture, I get this error message: "TglBitmap.LoadFromStream - Couldn't load Stream. It's possible to be an unknow Streamtype."
I get this both with bmps and jpgs.

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noeska

Betreff des Beitrags: Re: glModel (.3ds / .obj / Milkshape ascii .txt) Feedback

Verfasst: So Jan 03, 2010 17:29

DGL Member

Registriert: Di Jul 01, 2003 18:59
Beiträge: 887
Wohnort: (The Netherlands)
Programmiersprache: fpc/delphi/java/c#

There is new release for glmodel. Now it is at version 3.5a bringing a new vbo render target.
You can get i from svn or download it as an zip file from: http://www.noeska.net/downloads/glModel-3.5.0a.zip .

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http://3das.noeska.com - create adventure games without programming

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