*: initial implementation of pig

This is nothing to write home about, but it provides a little sandbox for
developing shader-generated textures in the spirit of shadertoy or the
demoscene tool bonzomatic.

It's more oriented towards developing shaders for use with libstage in
the small games I've been hacking on.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/bb3f.h b/src/bb3f.h
new file mode 100644
index 0000000..8bd4009
--- /dev/null
+++ b/src/bb3f.h
@@ -0,0 +1,38 @@
+/*
+ *  Copyright (C) 2018-2020 - Vito Caputo - <vcaputo@pengaru.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 3 as published
+ *  by the Free Software Foundation.
+ *
+ *  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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _BB3F_H
+#define _BB3F_H
+
+#include "v3f.h"
+
+typedef struct bb3f_t {
+	v3f_t	min, max;
+} bb3f_t;
+
+
+/* linearly interpolate between a and b by t */
+static inline bb3f_t bb3f_lerp(const bb3f_t *a, const bb3f_t *b, float t)
+{
+	bb3f_t	bb3f;
+
+	bb3f.min = v3f_lerp(&a->min, &b->min, t);
+	bb3f.max = v3f_lerp(&a->max, &b->max, t);
+
+	return bb3f;
+}
+
+#endif