Dans le thread sur gamedev.net, quelqu'un (SimmerD) affirme qu'il a décrit publiquement la même technique quelques mois auparavant :
"Don't worry about it fellas. I described this technique publicly a few months before they filed the patent - hence Prior Art. Ironically, it was at a Creative Labs developer's forum.
During my stencil buffer talk, I described doing shadow volumes the 'reverse' way. At the time, I didn't realize the major reason why the z fail method is better than the z pass method, although I did realize they were logically equivalent, which is why it's now known as 'Carmack's Reverse' and not 'Dietrich's Reverse'!"
Ils en parlent un peu dans le thread sur Beyond3D, l'auteur de l'article a envoyé un mail à SimmerD, j'espère qu'il pourra donner plus de précisions à ce sujet.
# Prior art
Posté par Frédéric Lopez . En réponse à la dépêche John Carmack victime des brevets logiciels. Évalué à 9.
"Don't worry about it fellas. I described this technique publicly a few months before they filed the patent - hence Prior Art. Ironically, it was at a Creative Labs developer's forum.
During my stencil buffer talk, I described doing shadow volumes the 'reverse' way. At the time, I didn't realize the major reason why the z fail method is better than the z pass method, although I did realize they were logically equivalent, which is why it's now known as 'Carmack's Reverse' and not 'Dietrich's Reverse'!"
Ils en parlent un peu dans le thread sur Beyond3D, l'auteur de l'article a envoyé un mail à SimmerD, j'espère qu'il pourra donner plus de précisions à ce sujet.