how to set the UV cords in a cube using eggData?

Scripting Issues
1

Hey,

So this is my Code, it creates a cube with 8 vertices and 6 polygons. So some of the vertices are used by 2 polygons.

def makeTest(sx,sy,sz,breite,tiefe,hoehe,groupname, filename=None):
    data = EggData()
    group = EggGroup(groupname)
    data.addChild(group)

    cFlags = EggGroup.CFKeep+EggGroup.CFDescend
    group.setCsType(EggGroup.CSTPolyset)
    group.setCollideFlags(cFlags)

    vPool = EggVertexPool('Cell')

    wallTex = EggTexture("wallTex", "wall.jpg")
    wallTex.setTextureType(Texture.TT3dTexture)
    wallTex.setWrapMode(Texture.WMRepeat)
    wallTex.setUvName("wallTex")

    group.addChild(wallTex)

    A = EggVertex()
    B = EggVertex()
    C = EggVertex()
    D = EggVertex()
    E = EggVertex()
    F = EggVertex()
    G = EggVertex()
    H = EggVertex()

    A.setUvw("wallTex",Point3D(0,0,0))
    A.setPos(Point3D(sx,sy,sz))
    B.setUvw("wallTex",Point3D(1,0,0))
    B.setPos(Point3D(sx + breite,sy,sz))
    C.setUvw("wallTex",Point3D(1,1,0))
    C.setPos(Point3D(sx + breite,sy,sz + hoehe))
    D.setUvw("wallTex",Point3D(0, 1, 0))
    D.setPos(Point3D(sx,sy,sz + hoehe))
    E.setUvw("wallTex",Point3D(0, 0, 1))
    E.setPos(Point3D(sx,sy+tiefe,sz))
    F.setUvw("wallTex",Point3D(1,0,1))
    F.setPos(Point3D(sx+breite,sy+tiefe,sz))
    G.setUvw("wallTex",Point3D(1,1,1))
    G.setPos(Point3D(sx+breite,sy+tiefe,sz + hoehe))
    H.setUvw("wallTex",Point3D(0, 1,1))
    H.setPos(Point3D(sx,sy+tiefe,sz + hoehe))

    #front
    ABCD = EggPolygon()

    ABCD.addVertex(vPool.addVertex(A))
    ABCD.addVertex(vPool.addVertex(B))
    ABCD.addVertex(vPool.addVertex(C))
    ABCD.addVertex(vPool.addVertex(D))

    ABCD.addTexture(wallTex)

    group.addChild(ABCD)

    #back
    HGFE = EggPolygon()

    HGFE.addVertex(vPool.addVertex(H))
    HGFE.addVertex(vPool.addVertex(G))
    HGFE.addVertex(vPool.addVertex(F))
    HGFE.addVertex(vPool.addVertex(E))
    HGFE.addTexture(wallTex)

    group.addChild(HGFE)

    #top
    DCGH = EggPolygon()

    DCGH.addVertex(vPool.findMatchingVertex(D))
    DCGH.addVertex(vPool.findMatchingVertex(C))
    DCGH.addVertex(vPool.findMatchingVertex(G))
    DCGH.addVertex(vPool.findMatchingVertex(H))
    #DCGH.triangulateInPlace(1)
    DCGH.addTexture(wallTex)

    group.addChild(DCGH)

    #linke Seite
    DHEA = EggPolygon()

    DHEA.addVertex(vPool.findMatchingVertex(D))
    DHEA.addVertex(vPool.findMatchingVertex(H))
    DHEA.addVertex(vPool.findMatchingVertex(E))
    DHEA.addVertex(vPool.findMatchingVertex(A))
    DHEA.addTexture(wallTex)

    group.addChild(DHEA)

    #right side
    BFGC = EggPolygon()

    BFGC.addVertex(vPool.findMatchingVertex(B))
    BFGC.addVertex(vPool.findMatchingVertex(F))
    BFGC.addVertex(vPool.findMatchingVertex(G))
    BFGC.addVertex(vPool.findMatchingVertex(C))
    BFGC.addTexture(wallTex)

    group.addChild(BFGC)

    #bottom
    EFBA = EggPolygon()

    EFBA.addVertex(vPool.findMatchingVertex(E))
    EFBA.addVertex(vPool.findMatchingVertex(F))
    EFBA.addVertex(vPool.findMatchingVertex(B))
    EFBA.addVertex(vPool.findMatchingVertex(A))
    EFBA.addTexture(wallTex)

    group.addChild(EFBA)


    #nodeData = loadEggData(data)
    #nPath = NodePath(nodeData)
    #npath.reparentTo(render)
    node = loadEggData(data)
    return NodePath(node)

box = builder.makeTest(10,20,0,20,20,10,'wall')
box.reparentTo(render)

I got some problems with the UV coordinates and I hope someone could help me.

If i use wallTex.setTextureType(Texture.TTCubeMap) with wall.jpg changed to wall#.jpg and wall0.jpg-wall5.jpg created, i get the error:

:display:gsg:glgsg(error): GL texture creation failed for wall0 : invalid value
:display:gsg:glgsg(error): Could not load wall0

I hope someone can explain to me how to set the UVs right.Do I need more UVs for 1 vertex ?

Bye

2

You are using the wrong symbols to define your texture. Since you are using the egg library to create an egg file, instead of creating a Texture object directly, you must use the Egg symbols. So instead of this:

    wallTex.setTextureType(Texture.TT3dTexture)
    wallTex.setWrapMode(Texture.WMRepeat)

do this:

   wallTex.setTextureType(EggTexture.TT3dTexture)
    wallTex.setWrapMode(EggTexture.WMRepeat)

But this has nothing to do with the UV coordinates, which as far as I can tell, you’re setting correctly.

David