I have problems with normals, I’ll try to describe here what I do
declarations:
ArrayList vertices = new ArrayList(); // points
ArrayList normals = new ArrayList(); // normals
ArrayList texCoord = new ArrayList(); // tex cords
ArrayList indexes = new ArrayList(); // indexes
I am building cube here, face by face so left, right, top, bottom, front and back faces/quads what ever you want to call them
I create 8 points of cube like this:
[java]
Vector3f pa = new Vector3f(bx-halfbsize, by-halfbsize, bz+halfbsize);
Vector3f pb = new Vector3f(bx+halfbsize, by-halfbsize, bz+halfbsize);
Vector3f pc = new Vector3f(bx-halfbsize, by+halfbsize, bz+halfbsize);
Vector3f pd = new Vector3f(bx+halfbsize, by+halfbsize, bz+halfbsize);
Vector3f pe = new Vector3f(bx-halfbsize, by-halfbsize, bz-halfbsize);
Vector3f pf = new Vector3f(bx+halfbsize, by-halfbsize, bz-halfbsize);
Vector3f pg = new Vector3f(bx-halfbsize, by+halfbsize, bz-halfbsize);
Vector3f ph = new Vector3f(bx+halfbsize, by+halfbsize, bz-halfbsize);
[/java]
I create some normals like this:
[java]
Vector3f normalUp = new Vector3f(0, 1, 0);
Vector3f normalDown = new Vector3f(0, -1, 0);
Vector3f normalRight = new Vector3f(1, 0, 0);
Vector3f normalLeft = new Vector3f(-1, 0, 0);
Vector3f normalFront = new Vector3f(0, 0, 1);
Vector3f normalBack = new Vector3f(0, 0, -1);
[/java]
for each side I create a face here example for right face:
[java]
// x = +
if(faces[rightFace] == 1)
{
/
vertices.add(pd);
vertices.add(pb);
vertices.add(pf);
vertices.add(ph);/
vertices.add(pb);
vertices.add(pf);
vertices.add(pd);
vertices.add(ph);
normals.add(normalRight); <
add normal here
texCoord.add(t1);
texCoord.add(t2);
texCoord.add(t3);
texCoord.add(t4);
indexes.add(verticesSize+2);
indexes.add(verticesSize+0);
indexes.add(verticesSize+1);
indexes.add(verticesSize+1);
indexes.add(verticesSize+3);
indexes.add(verticesSize+2);
}
[/java]
I go like that thru all the faces and build them up, add normal, texCoord, indices.
next I do this
[java]
// convert lists to arrays
Vector3f[] v3 = vertices.toArray(new Vector3f[vertices.size()]);
Vector3f[] n3 = normals.toArray(new Vector3f[normals.size()]);
Vector2f[] v2 = texCoord.toArray(new Vector2f[texCoord.size()]);
int indx[] = convertIntegers(indexes);
mapmesh.setBuffer(Type.Position, 3, BufferUtils.createFloatBuffer(v3));
mapmesh.setBuffer(Type.TexCoord, 2, BufferUtils.createFloatBuffer(v2));
mapmesh.setBuffer(Type.Index, 1, BufferUtils.createIntBuffer(indx));
mapmesh.setBuffer(Type.Normal, 3, BufferUtils.createFloatBuffer(n3));
mapmesh.updateBound();
[/java]
this is result:
with matDefName = "Common/MatDefs/Light/Lighting.j3md";
http://i.imgur.com/bHhTv.png
and with matDefName = "Common/MatDefs/Misc/ShowNormals.j3md";
http://i.imgur.com/fkcsA.png
I also tried to do:
TangentBinormalGenerator.generate(mapmesh);
it for some reason gives me an error:
[java]
Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]
java.lang.IndexOutOfBoundsException: 210
at java.nio.DirectFloatBufferU.get(DirectFloatBufferU.java:212)
at com.jme3.util.BufferUtils.populateFromBuffer(BufferUtils.java:259)
at com.jme3.util.TangentBinormalGenerator.processTriangleData(TangentBinormalGenerator.java:404)
at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:181)
at com.jme3.util.TangentBinormalGenerator.generate(TangentBinormalGenerator.java:145)
at mygame.Main.simpleInitApp(Main.java:156)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:219)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:117)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:188)
at java.lang.Thread.run(Thread.java:662)
[/java]
What am I doing wrong here, I asumed that normals would be correct and point outwar from the triangel if I build it counter clockwise which I do, but since my normals were messed up I then started assigning each face its normal.
What am I doing wrong here? btw I am using point light in scene.
