Solid White When Creating Nodes with Different Textures

[Serayen]

I'm trying to use a single mesh for multiple objects, with different textures per group. The mesh is working fine, and the textures work OK when I create one group. But if I try to create other groups with a different texture, only one texture works. it's usually only the first defined group that works, but it does seem to change sometimes.

Here's an image to help explain:



The bars are one group, and the squares should have a circle texture. As you can see, it's not working. There's nothing wrong with the texture; I've tried disabling the creation of the bar objects, and the circles display fine.

I'm using IrrlichtLime 1.2 and C#. This is the code for the mesh:

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      MeshBuffer meshBuffer = MeshBuffer.Create( VertexType.Standard, IndexType._16Bit );
      Vertex3D[] vertices = new Vertex3D[4];
      vertices[0] = new Vertex3D( 0, 0, 1, 0, 0, 0, Color.OpaqueWhite, 1, 1 );
      vertices[1] = new Vertex3D( 0, 0, 0, 0, 0, 0, Color.OpaqueWhite, 0, 1 );
      vertices[2] = new Vertex3D( 1, 0, 0, 0, 0, 0, Color.OpaqueWhite, 0, 0 );
      vertices[3] = new Vertex3D( 1, 0, 1, 0, 0, 0, Color.OpaqueWhite, 1, 0 );
      ushort[] indices = new ushort[] { 0, 1, 2, 0, 2, 3 };
 
      meshBuffer.Append( vertices, indices );
      
      Mesh mesh = Mesh.Create();
      mesh.AddMeshBuffer( meshBuffer );
      mesh.RecalculateBoundingBox();

It's being re-used for all objects. This is creating the material for the bars:

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      Material mat = new Material();
      mat.SetTexture( 0, m_textures["asteroid"] );
      mat.SetFlag( MaterialFlag.Lighting, false );
      mat.SetFlag( MaterialFlag.TrilinearFilter, true );
      mat.SetFlag( MaterialFlag.AnisotropicFilter, true );
      mat.SetFlag( MaterialFlag.BlendOperation, true );

The m_textures variable is just a dictionary containing the Texture objects, which are created with the VideoDriver.GetTexture() method.

The bar objects are created with this code:

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      MeshSceneNode m;
      foreach( AsteroidField ast in m_map.Asteroids )
      {
        m = m_sceneManager.AddMeshSceneNode( mesh );
 
        m.Position = new Vector3Df( ast.Y, 0, ast.X );
        m.SetMaterial( 0, mat );
      }

The material code for the circles is this:

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      mat = new Material();
      mat.SetTexture( 0, m_textures["star"] );
      mat.SetFlag( MaterialFlag.Lighting, false );
      mat.SetFlag( MaterialFlag.TrilinearFilter, true );
      mat.SetFlag( MaterialFlag.AnisotropicFilter, true );
      mat.SetFlag( MaterialFlag.BlendOperation, true );

And the circles objects are created like so:

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      foreach( Star star in m_map.Stars )
      {
        m = m_sceneManager.AddMeshSceneNode( mesh );
 
        m.Position = new Vector3Df( star.Y, 0, star.X );
        m.SetMaterial( 0, mat );
      }

For drawing the objects, I'm just doing SceneManager.DrawAll(). I've tried creating a new mesh and mesh buffer for the circles, but that had no effect. I also tried creating a new material for every object, also with no effect.

I've tried searching but all I could find was people not having textures working at all, whereas this seems to be something else.

[jaworekplay]

One question do you set the material flags after or before you create the scene nodes? If before try:

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mat = new Material();
foreach( Star star in m_map.Stars )
      {
        m = m_sceneManager.AddMeshSceneNode( mesh );
 
        m.Position = new Vector3Df( star.Y, 0, star.X );
        m.SetMaterial( 0, mat );
      }
mat.SetTexture( 0, m_textures["star"] );
mat.SetFlag( MaterialFlag.Lighting, false );
mat.SetFlag( MaterialFlag.TrilinearFilter, true );
mat.SetFlag( MaterialFlag.AnisotropicFilter, true );
mat.SetFlag( MaterialFlag.BlendOperation, true );

Hope it helps.
Good luck.

[Serayen]

I was setting it before. When I tried setting it after, the flags seemed to have no effect. In fact, it also broke the grid rendering. I added grid rendering after the original post, and the only effect it had was that it causes the problem in all nodes. The grid is drawn using 3D lines after SceneManager.DrawAll().

This is with the flags and texture set before node creation:


and this is flags after node creation:


In case it's important, the grid is drawn by resetting the world matrix using this:

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Driver.SetTransform( TransformationState.World, new Matrix() );

This it's just this in a couple loops:

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Driver.Draw3DLine( pos1, pos2, new Color( 41, 46, 49 ) );

[jaworekplay]

Do you create new material or do you re-assign existing one ?

[Serayen]

I create a new material.