What exactly are Normals? (I know there used to calculate which face gets
lighting)
And How do I define normals for example for the following TriangleArray:
private static final float[] verts =
{
-1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.5f,
-1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.5f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.5f,
-1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
};
(this is a shape that has four faces and makes up something like a pyramid)
I just copy and pasted the above verts into the normal array to see what
happened and it didnt exactly work:
private static final float[] normals =
{
-1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.5f,
-1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.5f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.5f,
-1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f,
};
I then created the shape with the following code:
Tarray = new TriangleArray(12, TriangleArray.COLOR_3 |
TriangleArray.COORDINATES | TriangleArray.NORMALS);
Tarray.setCoordinates(0, verts);
Tarray.setNormals(0, normals);
app = new Appearance();
mat = new Material(aColor, eColor, dColor, sColor, shinyness);
app.setMaterial(mat);
shp = new Shape3D(Tarray, app);
Thank you
Thomas M Clarke
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