#include <cgmath/cgmath.h>
+struct erb_rend;
struct erb_node;
struct erb_surf;
struct erb_ray;
struct erb_hit;
struct erb_aabb;
+struct erb_rect {
+ int x, y, w, h;
+};
+
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);
+/* job (block/frame) completion callback type */
+typedef void (*erb_done_func)(unsigned int job, struct erb_rect *rect, void *cls);
+
struct erb_aabb {
cgm_vec3 pos, sz;
};
+struct erb_key {
+ long tm;
+ float val;
+};
+
+enum {
+ ERB_TRK_X, ERB_TRK_Y, ERB_TRK_Z, /* position (x,y,z) */
+ ERB_TRK_QX, ERB_TRK_QY, ERB_TRK_QZ, ERB_TRK_QW, /* rotation quat (xi+yj+zk+w) */
+ ERB_TRK_SX, ERB_TRK_SY, ERB_TRK_SZ, /* scaling (x,y,z) */
+ ERB_NUM_TRACKS
+};
+enum erb_interp { ERB_LINEAR, ERB_STEP, ERB_CUBIC };
+enum erb_extrap { ERB_CLAMP, ERB_EXTEND, ERB_REPEAT };
+
+struct erb_track {
+ enum erb_interp interp; /* interpolation mode */
+ enum erb_extrap extrap; /* extrapolation mode */
+ struct erb_key *keys; /* dynamic array of keyframes */
+ int num_keys, max_keys; /* max_keys: allocated size, num_keys: used */
+};
+
struct erb_node {
struct erb_node *par; /* parent node */
struct erb_node *clist; /* child nodes */
struct erb_surf *surflist; /* surfaces in this node */
+ struct erb_track track[ERB_NUM_TRACKS]; /* PRS keyframe tracks */
float xform[16], inv_xform[16]; /* global transformation */
float node_xform[16], inv_node_xform[16]; /* local transformation */
};
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 */
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);
+
+void erb_setfov(struct erb_rend *erb, float vfov_deg);
+
+/* 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);
+
+void erb_set_done_callback(struct erb_rend *erb, erb_done_func donecb, void *cls);
+
+void erb_queue_frame(struct erb_rend *erb, unsigned int job_id);
+void erb_queue_block(struct erb_rend *erb, unsigned int job_id, int x, int y,
+ int width, int height);
+void erb_wait(struct erb_rend *erb);
+
+void erb_primary_ray(struct erb_rend *erb, struct erb_ray *ray, int sample);
+void erb_sample_ray(struct erb_rend *erb, struct erb_ray *ray, float *col);
/* transformation nodes */
struct erb_node *erb_node(void);
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_pos(struct erb_node *n, long tm, float x, float y, float z);
+void erb_node_rot(struct erb_node *n, long tm, float qx, float qy, float qz, float qw);
+void erb_node_rot_axis(struct erb_node *n, long tm, float angle_deg, float x, float y, float z);
+void erb_node_scale(struct erb_node *n, long tm, float sx, float sy, float sz);
+/* calculates transformation matrices for time tm by keyframe interpolation */
+void erb_node_update(struct erb_node *n, long tm);
+/* sets transformation, ignoring animation keyframes */
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 ... */
+
+void erb_node_eval_pos(struct erb_node *n, long tm, cgm_vec3 *pos);
+void erb_node_eval_rot(struct erb_node *n, long tm, cgm_quat *rot);
+void erb_node_eval_scale(struct erb_node *n, long tm, cgm_vec3 *scale);
+
+void erb_node_eval_matrix(struct erb_node *n, long tm, float *mat); /* mat[16] */
+void erb_node_eval_node_matrix(struct erb_node *n, long tm, float *mat); /* mat[16] */
/* surfaces */
struct erb_surf *erb_surface(int datasz);
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_ */