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stl_io.c

/*  ADMesh -- process triangulated solid meshes
 *  Copyright (C) 1995, 1996 Anthony D. Martin
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 *  Questions, comments, suggestions, etc to <amartin@engr.csulb.edu>
 */

#include <stdlib.h>
#include "stl.h"

#if !defined(SEEK_SET)
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif

static void stl_put_little_int(FILE *fp, int value);
static void stl_put_little_float(FILE *fp, float value_in);

void
stl_print_edges(stl_file *stl, FILE *file)
{
  int i;
  int edges_allocated;

  edges_allocated = stl->stats.number_of_facets * 3;
  for(i = 0; i < edges_allocated; i++)
    {
      fprintf(file, "%d, %f, %f, %f, %f, %f, %f\n",
            stl->edge_start[i].facet_number, 
            stl->edge_start[i].p1.x, stl->edge_start[i].p1.y, 
            stl->edge_start[i].p1.z, stl->edge_start[i].p2.x, 
            stl->edge_start[i].p2.y, stl->edge_start[i].p2.z);
    }
}


void
stl_stats_out(stl_file *stl, FILE *file, char *input_file)
{
  fprintf(file, "\n\
================= Results produced by ADMesh version 0.95 ================\n");
  fprintf(file, "\
Input file         : %s\n", input_file);
  if(stl->stats.type == binary)
    {
      fprintf(file, "\
File type          : Binary STL file\n");
    }
  else
    {
      fprintf(file, "\
File type          : ASCII STL file\n");
    }      
  fprintf(file, "\
Header             : %s\n", stl->stats.header);
  fprintf(file, "============== Size ==============\n");
  fprintf(file, "Min X = % f, Max X = % f\n", 
        stl->stats.min.x, stl->stats.max.x);
  fprintf(file, "Min Y = % f, Max Y = % f\n", 
        stl->stats.min.y, stl->stats.max.y);
  fprintf(file, "Min Z = % f, Max Z = % f\n", 
        stl->stats.min.z, stl->stats.max.z);
  
  fprintf(file, "\
========= Facet Status ========== Original ============ Final ====\n");
  fprintf(file, "\
Number of facets                 : %5d               %5d\n", 
        stl->stats.original_num_facets, stl->stats.number_of_facets);
  fprintf(file, "\
Facets with 1 disconnected edge  : %5d               %5d\n", 
        stl->stats.facets_w_1_bad_edge, stl->stats.connected_facets_2_edge -
        stl->stats.connected_facets_3_edge);
  fprintf(file, "\
Facets with 2 disconnected edges : %5d               %5d\n", 
        stl->stats.facets_w_2_bad_edge, stl->stats.connected_facets_1_edge -
        stl->stats.connected_facets_2_edge);
  fprintf(file, "\
Facets with 3 disconnected edges : %5d               %5d\n", 
        stl->stats.facets_w_3_bad_edge, stl->stats.number_of_facets -
        stl->stats.connected_facets_1_edge);
  fprintf(file, "\
Total disconnected facets        : %5d               %5d\n", 
        stl->stats.facets_w_1_bad_edge + stl->stats.facets_w_2_bad_edge +
        stl->stats.facets_w_3_bad_edge, stl->stats.number_of_facets - 
        stl->stats.connected_facets_3_edge);
        
  fprintf(file, 
"=== Processing Statistics ===     ===== Other Statistics =====\n");
  fprintf(file, "\
Number of parts       : %5d        Volume   : % f\n",
        stl->stats.number_of_parts, stl->stats.volume);
  fprintf(file, "\
Degenerate facets     : %5d\n", stl->stats.degenerate_facets);
  fprintf(file, "\
Edges fixed           : %5d\n", stl->stats.edges_fixed);
  fprintf(file, "\
Facets removed        : %5d\n", stl->stats.facets_removed);
  fprintf(file, "\
Facets added          : %5d\n", stl->stats.facets_added);
  fprintf(file, "\
Facets reversed       : %5d\n", stl->stats.facets_reversed);
  fprintf(file, "\
Backwards edges       : %5d\n", stl->stats.backwards_edges);
  fprintf(file, "\
Normals fixed         : %5d\n", stl->stats.normals_fixed);
}

void
stl_write_ascii(stl_file *stl, char *file, char *label)
{
  int       i;
  FILE      *fp;
  char      *error_msg;
  
  
  /* Open the file */
  fp = fopen(file, "w");
  if(fp == NULL)
    {
      error_msg = 
      malloc(81 + strlen(file)); /* Allow 80 chars+file size for message */
      sprintf(error_msg, "stl_write_ascii: Couldn't open %s for writing",
            file);
      perror(error_msg);
      free(error_msg);
      exit(1);
    }
  
  fprintf(fp, "solid  %s\n", label);
  
  for(i = 0; i < stl->stats.number_of_facets; i++)
    {
      fprintf(fp, "  facet normal % .8E % .8E % .8E\n",
            stl->facet_start[i].normal.x, stl->facet_start[i].normal.y,
            stl->facet_start[i].normal.z);
      fprintf(fp, "    outer loop\n");
      fprintf(fp, "      vertex % .8E % .8E % .8E\n",
            stl->facet_start[i].vertex[0].x, stl->facet_start[i].vertex[0].y,
            stl->facet_start[i].vertex[0].z);
      fprintf(fp, "      vertex % .8E % .8E % .8E\n",
            stl->facet_start[i].vertex[1].x, stl->facet_start[i].vertex[1].y,
            stl->facet_start[i].vertex[1].z);
      fprintf(fp, "      vertex % .8E % .8E % .8E\n",
            stl->facet_start[i].vertex[2].x, stl->facet_start[i].vertex[2].y,
            stl->facet_start[i].vertex[2].z);
      fprintf(fp, "    endloop\n");
      fprintf(fp, "  endfacet\n");
    }
  
  fprintf(fp, "endsolid  %s\n", label);
  
  fclose(fp);
}

void
stl_print_neighbors(stl_file *stl, char *file)
{
  int i;
  FILE *fp;
  char *error_msg;

  /* Open the file */
  fp = fopen(file, "w");
  if(fp == NULL)
    {
      error_msg = 
      malloc(81 + strlen(file)); /* Allow 80 chars+file size for message */
      sprintf(error_msg, "stl_print_neighbors: Couldn't open %s for writing",
            file);
      perror(error_msg);
      free(error_msg);
      exit(1);
    }

  for(i = 0; i < stl->stats.number_of_facets; i++)
    {
      fprintf(fp, "%d, %d,%d, %d,%d, %d,%d\n",
            i, 
            stl->neighbors_start[i].neighbor[0],
            (int)stl->neighbors_start[i].which_vertex_not[0],
            stl->neighbors_start[i].neighbor[1], 
            (int)stl->neighbors_start[i].which_vertex_not[1],
            stl->neighbors_start[i].neighbor[2],
            (int)stl->neighbors_start[i].which_vertex_not[2]);
    }
  fclose(fp);
}

static void
stl_put_little_int(FILE *fp, int value_in)
{
  int new_value;
  union 
    {
      int  int_value;
      char char_value[4];
    } value;
  
  value.int_value = value_in;
  
  new_value  = value.char_value[0] & 0xFF;
  new_value |= (value.char_value[1] & 0xFF) << 0x08;
  new_value |= (value.char_value[2] & 0xFF) << 0x10;
  new_value |= (value.char_value[3] & 0xFF) << 0x18;
  fwrite(&new_value, sizeof(int), 1, fp);
}

static void
stl_put_little_float(FILE *fp, float value_in)
{
  int new_value;
  union 
    {
      float float_value;
      char  char_value[4];
    } value;
  
  value.float_value = value_in;
  
  new_value  = value.char_value[0] & 0xFF;
  new_value |= (value.char_value[1] & 0xFF) << 0x08;
  new_value |= (value.char_value[2] & 0xFF) << 0x10;
  new_value |= (value.char_value[3] & 0xFF) << 0x18;
  fwrite(&new_value, sizeof(int), 1, fp);
}


void
stl_write_binary(stl_file *stl, char *file, char *label)
{
  FILE      *fp;
  int       i;
  char      *error_msg;

  
  /* Open the file */
  fp = fopen(file, "w");
  if(fp == NULL)
    {
      error_msg = 
      malloc(81 + strlen(file)); /* Allow 80 chars+file size for message */
      sprintf(error_msg, "stl_write_binary: Couldn't open %s for writing",
            file);
      perror(error_msg);
      free(error_msg);
      exit(1);
    }

  fprintf(fp, "%s", label);
  for(i = strlen(label); i < LABEL_SIZE; i++) putc(0, fp);

  fseek(fp, LABEL_SIZE, SEEK_SET);

  stl_put_little_int(fp, stl->stats.number_of_facets);
  
  for(i = 0; i < stl->stats.number_of_facets; i++)
    {
      stl_put_little_float(fp, stl->facet_start[i].normal.x);
      stl_put_little_float(fp, stl->facet_start[i].normal.y);
      stl_put_little_float(fp, stl->facet_start[i].normal.z);
      stl_put_little_float(fp, stl->facet_start[i].vertex[0].x);
      stl_put_little_float(fp, stl->facet_start[i].vertex[0].y);
      stl_put_little_float(fp, stl->facet_start[i].vertex[0].z);
      stl_put_little_float(fp, stl->facet_start[i].vertex[1].x);
      stl_put_little_float(fp, stl->facet_start[i].vertex[1].y);
      stl_put_little_float(fp, stl->facet_start[i].vertex[1].z);
      stl_put_little_float(fp, stl->facet_start[i].vertex[2].x);
      stl_put_little_float(fp, stl->facet_start[i].vertex[2].y);
      stl_put_little_float(fp, stl->facet_start[i].vertex[2].z);
      fputc(stl->facet_start[i].extra[0], fp);
      fputc(stl->facet_start[i].extra[1], fp);
    }
  
  fclose(fp);
}

void
stl_write_vertex(stl_file *stl, int facet, int vertex)
{
  printf("  vertex %d/%d % .8E % .8E % .8E\n", vertex, facet,
       stl->facet_start[facet].vertex[vertex].x,
       stl->facet_start[facet].vertex[vertex].y,
       stl->facet_start[facet].vertex[vertex].z);
}

void
stl_write_facet(stl_file *stl, char *label, int facet)
{
  printf("facet (%d)/ %s\n", facet, label);
  stl_write_vertex(stl, facet, 0);
  stl_write_vertex(stl, facet, 1);
  stl_write_vertex(stl, facet, 2);
}

void
stl_write_edge(stl_file *stl, char *label, stl_hash_edge edge)
{
  printf("edge (%d)/(%d) %s\n", edge.facet_number, edge.which_edge, label);
  if(edge.which_edge < 3)
    {
      stl_write_vertex(stl, edge.facet_number, edge.which_edge % 3);
      stl_write_vertex(stl, edge.facet_number, (edge.which_edge + 1) % 3);
    }
  else
    {
      stl_write_vertex(stl, edge.facet_number, (edge.which_edge + 1) % 3);
      stl_write_vertex(stl, edge.facet_number, edge.which_edge % 3);
    }
}

void
stl_write_neighbor(stl_file *stl, int facet)
{
  printf("Neighbors %d: %d, %d, %d ;  %d, %d, %d\n", facet,
       stl->neighbors_start[facet].neighbor[0],
       stl->neighbors_start[facet].neighbor[1],
       stl->neighbors_start[facet].neighbor[2],
       stl->neighbors_start[facet].which_vertex_not[0],
       stl->neighbors_start[facet].which_vertex_not[1],
       stl->neighbors_start[facet].which_vertex_not[2]);
}

void
stl_write_quad_object(stl_file *stl, char *file)
{
  FILE      *fp;
  int       i;
  int       j;
  char      *error_msg;
  stl_vertex connect_color;
  stl_vertex uncon_1_color;
  stl_vertex uncon_2_color;
  stl_vertex uncon_3_color;
  stl_vertex color;
  
  /* Open the file */
  fp = fopen(file, "w");
  if(fp == NULL)
    {
      error_msg = 
      malloc(81 + strlen(file)); /* Allow 80 chars+file size for message */
      sprintf(error_msg, "stl_write_quad_object: Couldn't open %s for writing",
            file);
      perror(error_msg);
      free(error_msg);
      exit(1);
    }

  connect_color.x = 0.0;
  connect_color.y = 0.0;
  connect_color.z = 1.0;
  uncon_1_color.x = 0.0;
  uncon_1_color.y = 1.0;
  uncon_1_color.z = 0.0;
  uncon_2_color.x = 1.0;
  uncon_2_color.y = 1.0;
  uncon_2_color.z = 1.0;
  uncon_3_color.x = 1.0;
  uncon_3_color.y = 0.0;
  uncon_3_color.z = 0.0;

  fprintf(fp, "CQUAD\n");
  for(i = 0; i < stl->stats.number_of_facets; i++)
    {
      j = ((stl->neighbors_start[i].neighbor[0] == -1) +
         (stl->neighbors_start[i].neighbor[1] == -1) +
         (stl->neighbors_start[i].neighbor[2] == -1));
      if(j == 0)
      {
        color = connect_color;
      }
      else if(j == 1)
      {
        color = uncon_1_color;
      }
      else if(j == 2)
      {
        color = uncon_2_color;
      }
      else
      {
        color = uncon_3_color;
      }
      fprintf(fp, "%f %f %f    %1.1f %1.1f %1.1f 1\n", 
            stl->facet_start[i].vertex[0].x,
            stl->facet_start[i].vertex[0].y, 
            stl->facet_start[i].vertex[0].z, color.x, color.y, color.z);
      fprintf(fp, "%f %f %f    %1.1f %1.1f %1.1f 1\n",
            stl->facet_start[i].vertex[1].x,
            stl->facet_start[i].vertex[1].y, 
            stl->facet_start[i].vertex[1].z, color.x, color.y, color.z);
      fprintf(fp, "%f %f %f    %1.1f %1.1f %1.1f 1\n",
            stl->facet_start[i].vertex[2].x,
            stl->facet_start[i].vertex[2].y, 
            stl->facet_start[i].vertex[2].z, color.x, color.y, color.z);
      fprintf(fp, "%f %f %f    %1.1f %1.1f %1.1f 1\n",
            stl->facet_start[i].vertex[2].x,
            stl->facet_start[i].vertex[2].y, 
            stl->facet_start[i].vertex[2].z, color.x, color.y, color.z);
    }
  fclose(fp);
}
  
void
stl_write_dxf(stl_file *stl, char *file, char *label)
{
  int       i;
  FILE      *fp;
  char      *error_msg;
  
  
  /* Open the file */
  fp = fopen(file, "w");
  if(fp == NULL)
    {
      error_msg = 
      malloc(81 + strlen(file)); /* Allow 80 chars+file size for message */
      sprintf(error_msg, "stl_write_ascii: Couldn't open %s for writing",
            file);
      perror(error_msg);
      free(error_msg);
      exit(1);
    }
  
  fprintf(fp, "999\n%s\n", label);
  fprintf(fp, "0\nSECTION\n2\nHEADER\n0\nENDSEC\n");
  fprintf(fp, "0\nSECTION\n2\nTABLES\n0\nTABLE\n2\nLAYER\n70\n1\n\
0\nLAYER\n2\n0\n70\n0\n62\n7\n6\nCONTINUOUS\n0\nENDTAB\n0\nENDSEC\n");
  fprintf(fp, "0\nSECTION\n2\nBLOCKS\n0\nENDSEC\n");
  
  fprintf(fp, "0\nSECTION\n2\nENTITIES\n");

  for(i = 0; i < stl->stats.number_of_facets; i++)
    {
      fprintf(fp, "0\n3DFACE\n8\n0\n");
      fprintf(fp, "10\n%f\n20\n%f\n30\n%f\n",
            stl->facet_start[i].vertex[0].x, stl->facet_start[i].vertex[0].y,
            stl->facet_start[i].vertex[0].z);
      fprintf(fp, "11\n%f\n21\n%f\n31\n%f\n",
            stl->facet_start[i].vertex[1].x, stl->facet_start[i].vertex[1].y,
            stl->facet_start[i].vertex[1].z);
      fprintf(fp, "12\n%f\n22\n%f\n32\n%f\n",
            stl->facet_start[i].vertex[2].x, stl->facet_start[i].vertex[2].y,
            stl->facet_start[i].vertex[2].z);
      fprintf(fp, "13\n%f\n23\n%f\n33\n%f\n",
            stl->facet_start[i].vertex[2].x, stl->facet_start[i].vertex[2].y,
            stl->facet_start[i].vertex[2].z);
    }
  
  fprintf(fp, "0\nENDSEC\n0\nEOF\n");
  
  fclose(fp);
}

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