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[erebus2020] / liberebus / src / erebus.h

diff --git a/liberebus/src/erebus.h b/liberebus/src/erebus.h
index 6ec33e3..fcb097b 100644 (file)
--- a/liberebus/src/erebus.h
+++ b/liberebus/src/erebus.h
@@ -3,6 +3,7 @@
 
 #include <cgmath/cgmath.h>
 
+struct erb_rend;
 struct erb_node;
 struct erb_surf;
 struct erb_ray;
@@ -10,6 +11,7 @@ struct erb_hit;
 struct erb_aabb;
 
 typedef int (*erb_intersect_func)(struct erb_surf *surf, struct erb_ray *ray, struct erb_hit *hit);
+typedef void (*erb_hitgeom_func)(struct erb_surf *surf, struct erb_hit *hit);
 typedef void (*erb_sample_func)(struct erb_surf *surf, cgm_vec3 *pos);
 typedef void (*erb_bbox_func)(struct erb_surf *surf, struct erb_aabb *bb);
 
@@ -32,6 +34,7 @@ struct erb_surf {
        int bbox_valid;
 
        erb_intersect_func isect;       /* intersection routine */
+       erb_hitgeom_func hitgeom;       /* calculate derived values of the erb_hit structure */
        erb_sample_func sample;         /* random sample generation */
        erb_bbox_func calc_bbox;        /* bounds calculation */
 
@@ -47,11 +50,25 @@ struct erb_ray {
 
 struct erb_hit {
        float t, err;
+       cgm_vec3 pos, lpos;             /* global and local space hit positions */
        struct erb_surf *surf;
+       float total_dist;
+
+       /* derived by calc_hit */
+       cgm_vec3 norm, tang;
+       float u, v;
 };
 
-int erb_init(void);
-void erb_cleanup(void);
+struct erb_rend *erb_create(void);
+void erb_destroy(struct erb_rend *erb);
+
+int erb_allocframe(struct erb_rend *erb, int width, int height);
+float *erb_getframe(struct erb_rend *erb);
+
+/* clears the framebuffer and sample counters to begin rendering a new frame */
+void erb_begin(struct erb_rend *erb);
+/* finalizes the frame, averaging samples (optional) */
+float *erb_end(struct erb_rend *erb);
 
 /* transformation nodes */
 struct erb_node *erb_node(void);
@@ -61,10 +78,8 @@ int erb_node_rmchild(struct erb_node *n, struct erb_node *c);
 int erb_node_addsurf(struct erb_node *n, struct erb_surf *s);
 int erb_node_rmsurf(struct erb_node *n, struct erb_surf *s);
 
+/* sets the transformation matrix and also calculates the inverse */
 void erb_node_setxform(struct erb_node *n, float *mat);
-void erb_node_mulxform(struct erb_node *n, float *mat);
-void erb_node_translate(struct erb_node *n, float x, float y, float z);
-/* TODO ... more ... */
 
 /* surfaces */
 struct erb_surf *erb_surface(int datasz);
@@ -73,6 +88,6 @@ struct erb_surf *erb_surf_sphere(float rad);
 struct erb_surf *erb_surf_box(float xsz, float ysz, float zsz);
 
 /* utility functions */
-void erb_xform_ray(struct erb_ray *ray, float *mat);
+void erb_xform_ray(struct erb_ray *inray, float *mat, cgm_vec3 *org, cgm_vec3 *dir);
 
 #endif /* RENDLIB_H_ */