stress.h

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
#include <util/api.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <neatogen/defs.h>
 
#define tolerance_cg 1e-3
 
#define DFLT_ITERATIONS 200
 
#define DFLT_TOLERANCE 1e-4
 
    /* some possible values for 'num_pivots_stress' */
#define num_pivots_stress 40
 
#define opt_smart_init 0x4
#define opt_exp_flag   0x3
 
    /* Full dense stress optimization (equivalent to Kamada-Kawai's energy) */
    /* Slowest and most accurate optimization */
PRIVATE int stress_majorization_kD_mkernel(vtx_data * graph,    /* Input graph in sparse representation */
                                              int n,    /* Number of nodes */
                                              double **coords,  /* coordinates of nodes (output layout)  */
                                              node_t **nodes,   /* original nodes  */
                                              int dim,  /* dimemsionality of layout */
                                              int opts, /* option flags */
                                              int model,        /* model */
                                              int maxi  /* max iterations */
        );
 
PRIVATE float *compute_apsp_packed(vtx_data * graph, int n);
PRIVATE float *compute_apsp_artificial_weights_packed(vtx_data *graph, int n);
PRIVATE float* circuitModel(vtx_data * graph, int nG);
PRIVATE float* mdsModel (vtx_data * graph, int nG);
PRIVATE int initLayout(int n, int dim, double **coords, node_t **nodes);
 
#ifdef __cplusplus
}
#endif