Hello all.
I am having some trouble loading a scene I put together in AC3D. It is a simple scene made up by rects to create a tile map – it is for a Tactical RPG scene, if you’ve played a Tactical RPG you get the picture. 
In AC3D all the normals are pointing in the correct direction. I wrote a simple converter that translates the AC3D file into a JME binary file – it is very simple, expecting that everything sent to it is a rect and creates only Quads out to produce the scene.
My trouble is that some of the resulting Quads point the correct way, while others are flipped 180 degrees. I had this problem once before and fixed it (or so I thought) by altering the vertex order in the converter, but the problem seems to have come back.
How can I be sure that the Quad will point the correct way?
Here is the top of the AC3D file:
AC3Db
MATERIAL "ac3dmat2" rgb 0.627451 0.25098 0.25098 amb 0.2 0.2 0.2 emis 0 0 0 spec 0.5 0.5 0.5 shi 10 trans 0
MATERIAL "ac3dmat7" rgb 0.270588 0.52549 0.454902 amb 0.2 0.2 0.2 emis 0 0 0 spec 0.5 0.5 0.5 shi 10 trans 0
OBJECT world
kids 360
OBJECT poly
name "rect"
loc -0.5 1.5 -0.5
texture "data/texture/geffen/gef_field-04.png"
crease 45.000000
numvert 4
0 0 0
1 0 0
1 0 1
0 0 1
numsurf 1
SURF 0x0
mat 1
refs 4
3 0 0
2 1 0
1 1 1
0 0 1
kids 0
OBJECT poly
name "rect"
loc -0.5 0.5 0.5
crease 45.000000
numvert 4
1 0 5.96046e-08
0 0 0
0 1 0
1 1 5.96046e-08
numsurf 1
SURF 0x0
mat 0
refs 4
3 0 0
2 1 0
1 1 1
0 0 1
kids 0
Here is the function that actually builds the Quad in my converter, though I am not sure how useful it is w/o the rest of the program:
private Quad buildQuad(AC3DObject inObject) {
if (inObject.getVertexCount() != 4)
return null;
AC3DMaterial tmpMaterial;
AC3DSurface tmpSurface;
Quad tmpQuad = new Quad(inObject.getName(), 0.25f, 0.25f);
Vector3f[] verts = new Vector3f[inObject.getVerticies().length];
for (int i=0; i < inObject.getVerticies().length; i++) {
verts[3-i] = new Vector3f(inObject.getVerticies()[i][0] + inObject.getLocation()[0],
inObject.getVerticies()[i][1] + inObject.getLocation()[1],
inObject.getVerticies()[i][2] + inObject.getLocation()[2]);
System.out.println("Built Vert " + i + ": " + verts[i]);
}
tmpQuad.setVertices(verts);
/** construct the color, texture coordinate vector and indexes array */
ColorRGBA[] colors = new ColorRGBA[inObject.getVerticies().length];
Vector2f[] texCoords = new Vector2f[inObject.getVerticies().length];
int[] indexes = new int[inObject.getSurfaces().size() * inObject.getVertexCount()];
int surfIndex = 0;
for (int j=0; j < inObject.getSurfaces().size(); j++) {
tmpSurface = (AC3DSurface)inObject.getSurfaces().get(j);
tmpMaterial = (AC3DMaterial)materials.get(tmpSurface.material);
for (int k=0; k < tmpSurface.surfVerts.length; k++) {
/** assign the color attributes to the vertex */
if (colors[tmpSurface.surfVerts[k]] == null)
colors[tmpSurface.surfVerts[k]] = new ColorRGBA(tmpMaterial.getColor().getRed(),
tmpMaterial.getColor().getGreen(),
tmpMaterial.getColor().getBlue(),
1);
/** if we haven't assigned the texture coordinate, do so */
if (texCoords[tmpSurface.surfVerts[k]] == null) {
texCoords[tmpSurface.surfVerts[k]] = new Vector2f(tmpSurface.textCoords[k][0], tmpSurface.textCoords[k][1]);
System.out.println("Texture Coord " + tmpSurface.surfVerts[k] + " set: " + tmpSurface.textCoords[k][0] + ", " + tmpSurface.textCoords[k][1]);
}
/** add the vertex order to the indexes array */
indexes[surfIndex] = tmpSurface.surfVerts[k];
surfIndex++;
}
/** set the cull state for single sided polys */
if (!tmpSurface.isTwoSided()) {
CullState cs = DisplaySystem.getDisplaySystem().getRenderer().createCullState();
cs.setCullMode(CullState.CS_BACK);
tmpQuad.setRenderState(cs);
}
}
/** apply the texture if one exists */
if (inObject.textureName != null) {
TextureState ts = DisplaySystem.getDisplaySystem().getRenderer().createTextureState();
Texture texture = TextureManager.loadTexture(inObject.textureName, Texture.MM_LINEAR, Texture.FM_LINEAR, true);
ts.setTexture(texture);
ts.setEnabled(true);
tmpQuad.setTextures(texCoords);
tmpQuad.setRenderState(ts);
}
return tmpQuad;
}
Thanks for any help!
