X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=erebus2020;a=blobdiff_plain;f=liberebus%2Fsrc%2Ferebus.h;fp=liberebus%2Fsrc%2Ferebus.h;h=c439e439e30a5e5f62c2b43ed504e8524b358444;hp=0000000000000000000000000000000000000000;hb=b5cff57ff6e83f7660e31636a986d2fcedf786e5;hpb=c8b13dff969d8104c178d9362aa21cefb9d61fe8

diff --git a/liberebus/src/erebus.h b/liberebus/src/erebus.h
new file mode 100644
index 0000000..c439e43
--- /dev/null
+++ b/liberebus/src/erebus.h
@@ -0,0 +1,44 @@
+#ifndef RENDLIB_H_
+#define RENDLIB_H_
+
+#include <cgmath/cgmath.h>
+
+struct erb_node;
+struct erb_surf;
+struct erb_ray;
+struct erb_hit;
+
+typedef int (*erb_intersect_func)(struct erb_surf *surf, struct erb_ray *ray, struct erb_hit *hit);
+typedef void (*erb_sample_func)(struct erb_surf *surf, cgm_vec3 *pos);
+
+struct erb_node {
+	struct erb_node *par;						/* parent node */
+	struct erb_node *clist;						/* child nodes */
+	struct erb_surf *surflist;					/* surfaces in this node */
+	float xform[16], inv_xform[16];				/* global transformation */
+	float node_xform[16], inv_node_xform[16];	/* local transformation */
+};
+
+struct erb_surf {
+	struct erb_node *node;		/* transformation node for this surface */
+
+	erb_intersect_func isect;	/* intersection routine */
+	erb_sample_func sample;		/* random sample generation */
+};
+
+struct erb_ray {
+	cgm_vec3 o, d;		/* origin and direction */
+	float tmin, tmax;	/* segment bounds */
+	float ior;			/* IOR of the medium through which this ray travels */
+	float total_dist;	/* travel distance accumulator */
+};
+
+struct erb_hit {
+	float t, err;
+	struct erb_surf *surf;
+};
+
+int erb_init(void);
+void erb_cleanup(void);
+
+#endif	/* RENDLIB_H_ */