problem with normals

ioda100 · 2004-02-04T13:44:41

i tried to draw a 3D figure and to redraw it on the other face to have a 360° D object but the normals of the first face seem to be replace by these from the face behind. for 2nd face, i do only *(-1) to the z coordonate of each vertex and normal. here is an image of what happen : http://membres.lycos.fr/ioda100/3D/normals.jpg here is the code : http://membres.lycos.fr/ioda100/3D/normal%20code.txt thx in advance for your help

NeHe Productions Affiliates

Started by ioda100 February 02, 2004 01:57 PM

29 comments, last by ioda100 21 years, 1 month ago

Anonymous

February 04, 2004 01:44 PM

I think what was happening to you originally was two things:

you didn''t have depth-testing enabled & the 2nd face drawn was always on top &... you might not have had front-&-back facing polygons enabled... so the 2nd face that was drawn... looked terrible because you were seeing the backside of all the polygons. Pair these 2 problems with various light settings & material settins for your vertices... & you can see all sorts of weird stuff.