def draw_boundary_images(glf, glb, v, f, vpe, fpe, camera): """Assumes camera is set up correctly, and that glf has any texmapping on necessary.""" glf.Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) glb.Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # Figure out which edges are on pairs of differently visible triangles from opendr.geometry import TriNormals tn = TriNormals(v, f).r.reshape((-1, 3)) campos = -cv2.Rodrigues(camera.rt.r)[0].T.dot(camera.t.r) rays_to_verts = v.reshape((-1, 3)) - row(campos) rays_to_faces = rays_to_verts[f[:, 0]] + rays_to_verts[ f[:, 1]] + rays_to_verts[f[:, 2]] dps = np.sum(rays_to_faces * tn, axis=1) dps = dps[fpe[:, 0]] * dps[fpe[:, 1]] silhouette_edges = np.asarray(np.nonzero(dps <= 0)[0], np.uint32) non_silhouette_edges = np.nonzero(dps > 0)[0] lines_e = vpe[silhouette_edges] lines_v = v visibility = draw_edge_visibility(glb, lines_v, lines_e, f, hidden_wireframe=True) shape = visibility.shape visibility = visibility.ravel() visible = np.nonzero(visibility.ravel() != 4294967295)[0] visibility[visible] = silhouette_edges[visibility[visible]] result = visibility.reshape(shape) return result
def compute_vpe_boundary_idxs(v, f, camera, fpe): # Figure out which edges are on pairs of differently visible triangles from geometry import TriNormals tn = TriNormals(v, f).r.reshape((-1,3)) #ray = cv2.Rodrigues(camera.rt.r)[0].T[:,2] campos = -cv2.Rodrigues(camera.rt.r)[0].T.dot(camera.t.r) rays_to_verts = v.reshape((-1,3)) - row(campos) rays_to_faces = rays_to_verts[f[:,0]] + rays_to_verts[f[:,1]] + rays_to_verts[f[:,2]] faces_invisible = np.sum(rays_to_faces * tn, axis=1) dps = faces_invisible[fpe[:,0]] * faces_invisible[fpe[:,1]] silhouette_edges = np.asarray(np.nonzero(dps<=0)[0], np.uint32) return silhouette_edges, faces_invisible < 0