added scr_lvled, a bunch of libraries, and improved framework code

[raydungeon] / libs / goat3d / src / aabox.c

diff --git a/libs/goat3d/src/aabox.c b/libs/goat3d/src/aabox.c
new file mode 100644 (file)
index 0000000..2bbfb3b
--- /dev/null
+++ b/libs/goat3d/src/aabox.c
@@ -0,0 +1,56 @@
+/*
+goat3d - 3D scene, and animation file format library.
+Copyright (C) 2013-2018  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <float.h>
+#include "aabox.h"
+
+void g3dimpl_aabox_init(struct aabox *box)
+{
+       cgm_vcons(&box->bmin, FLT_MAX, FLT_MAX, FLT_MAX);
+       cgm_vcons(&box->bmax, -FLT_MAX, -FLT_MAX, -FLT_MAX);
+}
+
+void g3dimpl_aabox_cons(struct aabox *box, float x0, float y0, float z0,
+               float x1, float y1, float z1)
+{
+       cgm_vcons(&box->bmin, x0, y0, z0);
+       cgm_vcons(&box->bmax, x1, y1, z1);
+}
+
+
+int g3dimpl_aabox_equal(const struct aabox *a, const struct aabox *b)
+{
+       if(a->bmin.x != b->bmin.x || a->bmin.y != b->bmin.y || a->bmin.z != b->bmin.z) {
+               return 0;
+       }
+       if(a->bmax.x != b->bmax.x || a->bmax.y != b->bmax.y || a->bmax.z != b->bmax.z) {
+               return 0;
+       }
+       return 1;
+}
+
+#define MIN(a, b)      ((a) < (b) ? (a) : (b))
+#define MAX(a, b)      ((a) > (b) ? (a) : (b))
+void g3dimpl_aabox_union(struct aabox *res, const struct aabox *a, const struct aabox *b)
+{
+       res->bmin.x = MIN(a->bmin.x, b->bmin.x);
+       res->bmin.y = MIN(a->bmin.y, b->bmin.y);
+       res->bmin.z = MIN(a->bmin.z, b->bmin.z);
+       res->bmax.x = MAX(a->bmax.x, b->bmax.x);
+       res->bmax.y = MAX(a->bmax.y, b->bmax.y);
+       res->bmax.z = MAX(a->bmax.z, b->bmax.z);
+}