X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fgeom.h;h=19c10ff6a1a4e758294a9d42cdaec7b7a4e51764;hb=82bf18c392447827912146ba65145500c9c25385;hp=fa492f035e319faf3dd11b26e4df1ebc825167ee;hpb=0b9d8564e9c3785a69829a8faa67f5169185d8fd;p=meshfrac

diff --git a/src/geom.h b/src/geom.h
index fa492f0..19c10ff 100644
--- a/src/geom.h
+++ b/src/geom.h
@@ -7,8 +7,28 @@ struct plane {
 	cgm_vec3 pt, norm;
 };
 
+struct vertex {
+	cgm_vec3 pos, norm;
+	cgm_vec2 uv;
+};
+
+struct poly {
+	struct vertex *verts;	/* dynarr */
+};
+
 float plane_dist(const struct plane *p, const cgm_vec3 *pt);
 float plane_sdist(const struct plane *p, const cgm_vec3 *pt);
 void midplane(struct plane *p, const cgm_vec3 *a, const cgm_vec3 *b);
 
+void poly_plane(const struct poly *poly, struct plane *plane);
+int plane_poly(const struct plane *plane, struct poly *poly, float size);
+
+/* returns negative if there's no intersection, parametric distance if there is */
+float ray_plane(const cgm_ray *ray, const struct plane *plane);
+float ray_poly(const cgm_ray *ray, const struct poly *poly);
+
+int init_poly(struct poly *p);
+void destroy_poly(struct poly *p);
+int clip_poly(struct poly *pout, const struct poly *pin, const struct plane *plane);
+
 #endif	/* GEOM_H_ */