From 3228a46c1c7d345262324cad037d65cf7bbd62a4 Mon Sep 17 00:00:00 2001 From: Ian Jackson Date: Mon, 31 Dec 2007 02:25:15 +0000 Subject: [PATCH] sort triangles by centroids --- project.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/project.c b/project.c index a2e3f91..266237f 100644 --- a/project.c +++ b/project.c @@ -76,10 +76,14 @@ static void generate_display_list(void) { } static int dl_compare(const void *tav, const void *tbv) { + int i; const Triangle *const *tap= tav, *ta= *tap; const Triangle *const *tbp= tbp, *tb= *tbp; - double za= ta->vertex[0][2]; - double zb= tb->vertex[0][2]; + double za=0, zb=0; + for (i=0; i<3; i++) { + za += ta->vertex[i][2]; + zb += tb->vertex[i][2]; + } return za > zb ? -1 : za < zb ? +1 : 0; } -- 2.30.2