X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fscr%2Frt.h;fp=src%2Fscr%2Frt.h;h=f619a88082fe7c14a0cbc856bf00a6926d8afe99;hp=0000000000000000000000000000000000000000;hb=dfc6ebacd7bcc1e6b9e7168c3e4824d241d2d5c8;hpb=0aeee13aa695ec617ec22253824f17209660bd39

diff --git a/src/scr/rt.h b/src/scr/rt.h
new file mode 100644
index 0000000..f619a88
--- /dev/null
+++ b/src/scr/rt.h
@@ -0,0 +1,81 @@
+#ifndef RT_H_
+#define RT_H_
+
+#include "image.h"
+#include "cgmath/cgmath.h"
+
+struct rtmaterial {
+	cgm_vec3 kd, ks;
+	float shin;
+	struct image *tex;
+};
+
+enum rt_obj_type { RT_SPH, RT_PLANE };
+
+#define OBJ_COMMON	\
+	enum rt_obj_type type; \
+	struct rtmaterial mtl
+
+struct rtany {
+	OBJ_COMMON;
+};
+
+struct rtsphere {
+	OBJ_COMMON;
+	cgm_vec3 p;
+	float r;
+};
+
+struct rtplane {
+	OBJ_COMMON;
+	cgm_vec3 n;
+	float d;
+};
+
+union rtobject {
+	enum rt_obj_type type;
+	struct rtany x;
+	struct rtsphere s;
+	struct rtplane p;
+};
+
+struct rtlight {
+	cgm_vec3 p, color;
+};
+
+struct rayhit {
+	float t;
+	cgm_vec3 p, n;
+	float u, v;
+	cgm_ray *ray;
+	union rtobject *obj;
+};
+
+struct rtscene {
+	union rtobject **obj;
+	int num_obj;
+	struct rtlight **lt;
+	int num_lt;
+};
+
+/* scene management */
+void rt_init(struct rtscene *scn);
+void rt_destroy(struct rtscene *scn);
+
+void rt_color(float r, float g, float b);
+void rt_specular(float r, float g, float b);
+void rt_shininess(float s);
+
+union rtobject *rt_add_sphere(struct rtscene *scn, float x, float y, float z, float r);
+union rtobject *rt_add_plane(struct rtscene *scn, float nx, float ny, float nz, float d);
+struct rtlight *rt_add_light(struct rtscene *scn, float x, float y, float z);
+
+/* returns 0 for no hit */
+int ray_trace(cgm_ray *ray, struct rtscene *scn, int lvl, cgm_vec3 *color);
+
+int ray_object(cgm_ray *ray, union rtobject *obj, float maxt, struct rayhit *hit);
+int ray_scene(cgm_ray *ray, struct rtscene *scn, float maxt, struct rayhit *hit);
+int ray_sphere(cgm_ray *ray, struct rtsphere *sph, float maxt, struct rayhit *hit);
+int ray_plane(cgm_ray *ray, struct rtplane *plane, float maxt, struct rayhit *hit);
+
+#endif	/* RT_H_ */