From e2044191af98d7639d95c7245d3e9cd32b205213 Mon Sep 17 00:00:00 2001 From: John Allwine Date: Thu, 17 Jul 2014 23:15:42 -0600 Subject: [PATCH] first commit --- LICENSE | 696 ++++++++++++++++++++++++++++++++++ Makefile | 13 + README.md | 7 + src/stl_header.c | 116 ++++++ src/stl_merge.c | 130 +++++++ src/stl_transform.c | 891 ++++++++++++++++++++++++++++++++++++++++++++ src/stl_util.h | 50 +++ 7 files changed, 1903 insertions(+) create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README.md create mode 100644 src/stl_header.c create mode 100644 src/stl_merge.c create mode 100644 src/stl_transform.c create mode 100644 src/stl_util.h diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..ae51dc4 --- /dev/null +++ b/LICENSE @@ -0,0 +1,696 @@ +stl_cmd - a set of commands for manipulating binary STL files + +Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) + + This file is part of stl_cmd. + + stl_cmd 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 3 of the License, 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. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 3 of the License, 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, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..b610419 --- /dev/null +++ b/Makefile @@ -0,0 +1,13 @@ +all: bin/stl_header bin/stl_merge bin/stl_transform + +bin/stl_header: src/stl_header.c src/stl_util.h + gcc src/stl_header.c -o bin/stl_header + +bin/stl_merge: src/stl_merge.c src/stl_util.h + gcc src/stl_merge.c -o bin/stl_merge + +bin/stl_transform: src/stl_transform.c src/stl_util.h + gcc src/stl_transform.c -o bin/stl_transform + +clean: + rm -rf bin/* diff --git a/README.md b/README.md new file mode 100644 index 0000000..8c641e9 --- /dev/null +++ b/README.md @@ -0,0 +1,7 @@ +stl_cmd +======= + +The goal of each stl_cmd is to provide a simple command line interface for +manipulating binary STL files. They each aim to be fast and to have no dependencies. + +Copyright 2014 Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) diff --git a/src/stl_header.c b/src/stl_header.c new file mode 100644 index 0000000..d36343d --- /dev/null +++ b/src/stl_header.c @@ -0,0 +1,116 @@ +/* + +Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) + + This file is part of stl_cmd. + + stl_cmd 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 3 of the License, 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, see . + +*/ +#include +#include +#include +#include +#include "stl_util.h" + +#define BUFFER_SIZE 4096 + +void print_usage() { + fprintf(stderr, "usage: stl_header [-s
] [-o ] \n"); + fprintf(stderr, " If both -s and -o flags are specified is copied to and its header is set to
. If -o is not specified and -s is\n"); + fprintf(stderr, " then the header is set on the input file. If neither -o nor -s is specified,\n"); + fprintf(stderr, " the header of the model is output to the terminal.\n"); +} + +int main(int argc, char** argv) { + int c; + int errflg = 0; + char *set_header; + char *out_file; + int setflag = 0; + int outflag = 0; + + while((c = getopt(argc, argv, "s:o:")) != -1) { + switch(c) { + case 'o': + outflag = 1; + out_file = optarg; + break; + case 's': + setflag = 1; + set_header = optarg; + break; + case '?': + fprintf(stderr, "Unrecognized option: '-%c'\n", optopt); + errflg++; + break; + } + } + + if(errflg || optind >= argc) { + print_usage(); + exit(2); + } + + char* filename = argv[optind]; + char header[80]; + + if(!is_valid_binary_stl(filename)) { + fprintf(stderr, "stl_header only accepts binary stl files.\n"); + exit(2); + } + + FILE *f; + f = fopen(filename, "r+b"); + if(!f) { + fprintf(stderr, "Can't read file: %s\n", filename); + exit(2); + } + + if(setflag && outflag) { + strncpy(header, set_header, 80); + FILE *outf; + outf = fopen(out_file, "wb"); + if(!outf) { + fprintf(stderr, "Can't write to file: %s\n", out_file); + exit(2); + } + fwrite(header, 80, 1, outf); + fseek(f, 80, SEEK_SET); + + char buffer[BUFFER_SIZE]; + + int r; + while((r = fread(buffer, 1, BUFFER_SIZE, f))) { + fwrite(buffer, 1, r, outf); + } + fclose(f); + fclose(outf); + } else if(setflag) { + strncpy(header, set_header, 80); + fwrite(header, 80, 1, f); + fclose(f); + } else { + fread(header, 80, 1, f); + fclose(f); + + for(int i = 0; i < 80; i++) { + printf("%c", header[i]); + } + printf("\n"); + } + + return 0; +} diff --git a/src/stl_merge.c b/src/stl_merge.c new file mode 100644 index 0000000..6a80e3b --- /dev/null +++ b/src/stl_merge.c @@ -0,0 +1,130 @@ +/* + +Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) + + This file is part of stl_cmd. + + stl_cmd 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 3 of the License, 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, see . + +*/ +#include +#include +#include +#include +#include +#include "stl_util.h" + +#define BUFFER_SIZE 4096 + +void print_usage() { + fprintf(stderr, "usage: stl_merge -o \n"); + fprintf(stderr, " Merges two binary stl files into a single file."); +} + +int main(int argc, char** argv) { + int c; + int errflg = 0; + char *out_file; + int outflag = 0; + + while((c = getopt(argc, argv, "o:")) != -1) { + switch(c) { + case 'o': + outflag = 1; + out_file = optarg; + break; + case '?': + fprintf(stderr, "Unrecognized option: '-%c'\n", optopt); + errflg++; + break; + } + } + + if(errflg || !outflag || argc != 5) { + print_usage(); + exit(2); + } + + char* file1 = argv[optind]; + char* file2 = argv[optind+1]; + + if(!is_valid_binary_stl(file1)) { + fprintf(stderr, "file1 is not a binary stl file.\n"); + exit(2); + } + + if(!is_valid_binary_stl(file2)) { + fprintf(stderr, "file2 is not a binary stl file.\n"); + exit(2); + } + + FILE *f1; + FILE *f2; + FILE *outf; + + f1 = fopen(file1, "rb"); + if(!f1) { + fprintf(stderr, "Can't read file1: %s\n", file1); + exit(2); + } + + f2 = fopen(file2, "rb"); + if(!f2) { + fprintf(stderr, "Can't read file2: %s\n", file2); + exit(2); + } + + outf = fopen(out_file, "wb"); + if(!outf) { + fprintf(stderr, "Can't open out file: %s\n", out_file); + exit(2); + } + + fseek(f1, 80, SEEK_SET); + fseek(f2, 80, SEEK_SET); + + uint32_t num_tris1; + uint32_t num_tris2; + + fread(&num_tris1, 4, 1, f1); + fread(&num_tris2, 4, 1, f2); + + char header[81] = {0}; // include an extra char for terminating \0 of snprintf + char base1[50]; + char base2[50]; + strncpy(base1, basename(file1), 50); + strncpy(base2, basename(file2), 50); + snprintf(header, 81, "Merged copy of %s and %s", base1, base2); + + uint32_t merged_tris = num_tris1+num_tris2; + + fwrite(header, 80, 1, outf); + fwrite(&merged_tris, 4, 1, outf); + + char buffer[BUFFER_SIZE]; + + int r; + while((r = fread(buffer, 1, BUFFER_SIZE, f1))) { + fwrite(buffer, 1, r, outf); + } + fclose(f1); + + while((r = fread(buffer, 1, BUFFER_SIZE, f2))) { + fwrite(buffer, 1, r, outf); + } + fclose(f2); + fclose(outf); + + return 0; +} diff --git a/src/stl_transform.c b/src/stl_transform.c new file mode 100644 index 0000000..ddbf50a --- /dev/null +++ b/src/stl_transform.c @@ -0,0 +1,891 @@ +/* + +Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) + + This file is part of stl_cmd. + + stl_cmd 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 3 of the License, 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, see . + +*/ +#include +#include +#include +#include +#include +#include +#include "stl_util.h" + +#define BUFFER_SIZE 4096 +#define PI 3.141592653589793 + +typedef struct { + float xx; + float xy; + float xz; + float xw; + float yx; + float yy; + float yz; + float yw; + float zx; + float zy; + float zz; + float zw; + float tx; + float ty; + float tz; + float tw; +} mat; + +typedef struct { + float x; + float y; + float z; + float w; +} vec; + +void mat_print(mat *m) { + printf("%f %f %f %f\n", m->xx, m->xy, m->xz, m->xw); + printf("%f %f %f %f\n", m->yx, m->yy, m->yz, m->yw); + printf("%f %f %f %f\n", m->zx, m->zy, m->zz, m->zw); + printf("%f %f %f %f\n", m->tx, m->ty, m->tz, m->tw); +} + +void init_identity_mat(mat *m) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_s_mat(mat *m, float s) { + m->xx = s; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = s; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = s; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_sx_mat(mat *m, float s) { + m->xx = s; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_sy_mat(mat *m, float s) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = s; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_sz_mat(mat *m, float s) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = s; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_rx_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = cosa; + m->yz = sina; + m->yw = 0; + + m->zx = 0; + m->zy = -sina; + m->zz = cosa; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_ry_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = cosa; + m->xy = 0; + m->xz = -sina; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = sina; + m->zy = 0; + m->zz = cosa; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_rz_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = cosa; + m->xy = sina; + m->xz = 0; + m->xw = 0; + + m->yx = -sina; + m->yy = cosa; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_tx_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = t; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_ty_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = t; + m->tz = 0; + m->tw = 1; +} + +void init_tz_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = t; + m->tw = 1; +} + +void init_inv_s_mat(mat *m, float s) { + m->xx = 1./s; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1./s; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1./s; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_inv_sx_mat(mat *m, float s) { + m->xx = 1./s; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_inv_sy_mat(mat *m, float s) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1./s; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_inv_sz_mat(mat *m, float s) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1./s; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_inv_rx_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = 1; + m->yx = 0; + m->zx = 0; + m->tx = 0; + + m->xy = 0; + m->yy = cosa; + m->zy = sina; + m->ty = 0; + + m->xz = 0; + m->yz = -sina; + m->zz = cosa; + m->tz = 0; + + m->xw = 0; + m->yw = 0; + m->zw = 0; + m->tw = 1; +} + +void init_inv_ry_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = cosa; + m->yx = 0; + m->zx = -sina; + m->tx = 0; + + m->xy = 0; + m->yy = 1; + m->zy = 0; + m->ty = 0; + + m->xz = sina; + m->yz = 0; + m->zz = cosa; + m->tz = 0; + + m->xw = 0; + m->yw = 0; + m->zw = 0; + m->tw = 1; +} + +void init_inv_rz_mat(mat *m, float angle) { + angle *= PI/180; // convert to radians + + float cosa = cos(angle); + float sina = sin(angle); + + m->xx = cosa; + m->yx = sina; + m->zx = 0; + m->tx = 0; + + m->xy = -sina; + m->yy = cosa; + m->zy = 0; + m->ty = 0; + + m->xz = 0; + m->yz = 0; + m->zz = 1; + m->tz = 0; + + m->xw = 0; + m->yw = 0; + m->zw = 0; + m->tw = 1; +} + +void init_inv_tx_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = -t; + m->ty = 0; + m->tz = 0; + m->tw = 1; +} + +void init_inv_ty_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = -t; + m->tz = 0; + m->tw = 1; +} + +void init_inv_tz_mat(mat *m, float t) { + m->xx = 1; + m->xy = 0; + m->xz = 0; + m->xw = 0; + + m->yx = 0; + m->yy = 1; + m->yz = 0; + m->yw = 0; + + m->zx = 0; + m->zy = 0; + m->zz = 1; + m->zw = 0; + + m->tx = 0; + m->ty = 0; + m->tz = -t; + m->tw = 1; +} + +void mat_transpose(mat *m, mat *out) { + out->xx = m->xx; + out->xy = m->yx; + out->xz = m->zx; + out->xw = m->tx; + + out->yx = m->xy; + out->yy = m->yy; + out->yz = m->zy; + out->yw = m->ty; + + out->zx = m->xz; + out->zy = m->yz; + out->zz = m->zz; + out->zw = m->tz; + + out->tx = m->xw; + out->ty = m->yw; + out->tz = m->zw; + out->tw = m->tw; +} + +void mat_mult(mat *m1, mat *m2, mat *out) { + out->xx = m1->xx*m2->xx+m1->xy*m2->yx+m1->xz*m2->zx+m1->xw*m2->tx; + out->xy = m1->xx*m2->xy+m1->xy*m2->yy+m1->xz*m2->zy+m1->xw*m2->ty; + out->xz = m1->xx*m2->xz+m1->xy*m2->yz+m1->xz*m2->zz+m1->xw*m2->tz; + out->xw = m1->xx*m2->xw+m1->xy*m2->yw+m1->xz*m2->zw+m1->xw*m2->tw; + + out->yx = m1->yx*m2->xx+m1->yy*m2->yx+m1->yz*m2->zx+m1->yw*m2->tx; + out->yy = m1->yx*m2->xy+m1->yy*m2->yy+m1->yz*m2->zy+m1->yw*m2->ty; + out->yz = m1->yx*m2->xz+m1->yy*m2->yz+m1->yz*m2->zz+m1->yw*m2->tz; + out->yw = m1->yx*m2->xw+m1->yy*m2->yw+m1->yz*m2->zw+m1->yw*m2->tw; + + out->zx = m1->zx*m2->xx+m1->zy*m2->yx+m1->zz*m2->zx+m1->zw*m2->tx; + out->zy = m1->zx*m2->xy+m1->zy*m2->yy+m1->zz*m2->zy+m1->zw*m2->ty; + out->zz = m1->zx*m2->xz+m1->zy*m2->yz+m1->zz*m2->zz+m1->zw*m2->tz; + out->zw = m1->zx*m2->xw+m1->zy*m2->yw+m1->zz*m2->zw+m1->zw*m2->tw; + + out->tx = m1->tx*m2->xx+m1->ty*m2->yx+m1->tz*m2->zx+m1->tw*m2->tx; + out->ty = m1->tx*m2->xy+m1->ty*m2->yy+m1->tz*m2->zy+m1->tw*m2->ty; + out->tz = m1->tx*m2->xz+m1->ty*m2->yz+m1->tz*m2->zz+m1->tw*m2->tz; + out->tw = m1->tx*m2->xw+m1->ty*m2->yw+m1->tz*m2->zw+m1->tw*m2->tw; +} + +void vec_mat_mult(vec *v, mat *m, vec *out) { + out->x = v->x*m->xx+v->y*m->yx+v->z*m->zx+v->w*m->tx; + out->y = v->x*m->xy+v->y*m->yy+v->z*m->zy+v->w*m->ty; + out->z = v->x*m->xz+v->y*m->yz+v->z*m->zz+v->w*m->tz; + out->w = v->x*m->xw+v->y*m->yw+v->z*m->zw+v->w*m->tw; +} + +float vec_magnitude(vec *v) { + return sqrt(v->x*v->x+v->y*v->y+v->z*v->z); +} + +void vec_normalize(vec *v, vec *out) { + float invmag = 1./vec_magnitude(v); + out->x = v->x*invmag; + out->y = v->y*invmag; + out->z = v->z*invmag; +} + +void vec_copy(vec *v, vec *out) { + out->x = v->x; + out->y = v->y; + out->z = v->z; + out->w = v->w; +} + +void mat_copy(mat *m1, mat *out) { + out->xx = m1->xx; + out->xy = m1->xy; + out->xz = m1->xz; + out->xw = m1->xw; + + out->yx = m1->yx; + out->yy = m1->yy; + out->yz = m1->yz; + out->yw = m1->yw; + + out->zx = m1->zx; + out->zy = m1->zy; + out->zz = m1->zz; + out->zw = m1->zw; + + out->tx = m1->tx; + out->ty = m1->ty; + out->tz = m1->tz; + out->tw = m1->tw; +} + +void print_usage() { + fprintf(stderr, "usage: stl_transform [[ ] ...] \n"); + fprintf(stderr, " Performs any number of the follow transformations in\n"); + fprintf(stderr, " the order they are listed on the command line:\n"); + fprintf(stderr, " -rx - rotates degrees about the x-axis\n"); + fprintf(stderr, " -ry - rotates degrees about the y-axis\n"); + fprintf(stderr, " -rz - rotates degrees about the z-axis\n"); + fprintf(stderr, " -s - uniformly scales x, y and z by (cannot be 0)\n"); + fprintf(stderr, " -sx - scales by in x (cannot be 0)\n"); + fprintf(stderr, " -sy - scales by in y (cannot be 0)\n"); + fprintf(stderr, " -sz - scales by in z (cannot be 0)\n"); + fprintf(stderr, " -tx - translates units in x\n"); + fprintf(stderr, " -ty - translates units in y\n"); + fprintf(stderr, " -tz - translates units in z\n"); +} + +int main(int argc, char** argv) { + int errflg = 0; + int did_scale = 0; + + mat tmp; + mat tmp2; + mat combined; + mat inv_combined; + mat inv_transpose; + + init_identity_mat(&combined); + init_identity_mat(&inv_combined); + + int index; + float arg; + // TODO better arg handling so better errors can be displayed + for(index = 1; index < argc; index++) { + if(strcmp("-rx", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_rx_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_rx_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else if(strcmp("-ry", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_ry_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_ry_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else if(strcmp("-rz", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_rz_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_rz_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else if(strcmp("-s", argv[index]) == 0) { + index++; + if(index >= argc) break; + did_scale = 1; + arg = atof(argv[index]); + if(arg == 0) { + errflg++; + } else { + init_s_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_s_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } + } else if(strcmp("-sx", argv[index]) == 0) { + index++; + if(index >= argc) break; + did_scale = 1; + arg = atof(argv[index]); + if(arg == 0) { + errflg++; + } else { + init_sx_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_sx_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } + } else if(strcmp("-sy", argv[index]) == 0) { + index++; + if(index >= argc) break; + did_scale = 1; + arg = atof(argv[index]); + if(arg == 0) { + errflg++; + } else { + init_sy_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_sy_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } + } else if(strcmp("-sz", argv[index]) == 0) { + index++; + if(index >= argc) break; + did_scale = 1; + arg = atof(argv[index]); + if(arg == 0) { + errflg++; + } else { + init_sz_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_sz_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } + } else if(strcmp("-tx", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_tx_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_tx_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else if(strcmp("-ty", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_ty_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_ty_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else if(strcmp("-tz", argv[index]) == 0) { + index++; + if(index >= argc) break; + arg = atof(argv[index]); + init_tz_mat(&tmp, arg); + mat_copy(&combined, &tmp2); + mat_mult(&tmp2, &tmp, &combined); + + init_inv_tz_mat(&tmp, arg); + mat_copy(&inv_combined, &tmp2); + mat_mult(&tmp, &tmp2, &inv_combined); + } else { + break; + } + } + + if(errflg || index+1 >= argc) { + print_usage(); + exit(2); + } + + char *file = argv[index]; + char *outfile = argv[index+1]; + + if(!is_valid_binary_stl(file)) { + fprintf(stderr, "%s is not a binary stl file.\n", file); + exit(2); + } + + mat_transpose(&inv_combined, &inv_transpose); + + FILE *f; + FILE *outf; + + f = fopen(file, "rb"); + if(!f) { + fprintf(stderr, "Can't read file: %s\n", file); + exit(2); + } + + outf = fopen(outfile, "wb"); + if(!outf) { + fprintf(stderr, "Can't write to file: %s\n", outfile); + exit(2); + } + + fseek(f, 80, SEEK_SET); + + uint32_t num_tris; + + fread(&num_tris, 4, 1, f); + + char header[81] = {0}; // include an extra char for terminating \0 of snprintf + snprintf(header, 81, "Transformed copy of %s", basename(file)); + + fwrite(header, 80, 1, outf); + fwrite(&num_tris, 4, 1, outf); + + uint16_t abc; // attribute byte count + + vec tmp_vec; + vec normal; + vec point; + + normal.w = 0; + point.w = 1; + + for(int i = 0; i < num_tris; i++) { + fread(&normal, 1, 12,f); + + vec_mat_mult(&normal, &inv_transpose, &tmp_vec); + if(did_scale) { + vec_normalize(&tmp_vec, &normal); + fwrite(&normal, 1, 12, outf); + } else { + fwrite(&tmp_vec, 1, 12, outf); + } + + for(int j = 0; j < 3; j++) { + fread(&point, 1, 12,f); + vec_mat_mult(&point, &combined, &tmp_vec); + fwrite(&tmp_vec, 1, 12, outf); + } + fread(&abc, 1, 2,f); + fwrite(&abc, 1, 2,outf); + } + + fclose(f); + fclose(outf); + + return 0; +} diff --git a/src/stl_util.h b/src/stl_util.h new file mode 100644 index 0000000..f14ccf3 --- /dev/null +++ b/src/stl_util.h @@ -0,0 +1,50 @@ +/* + +Copyright 2014 by Freakin' Sweet Apps, LLC (stl_cmd@freakinsweetapps.com) + + This file is part of stl_cmd. + + stl_cmd 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 3 of the License, 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, see . + +*/ +#include + +int is_valid_binary_stl(char* filename) { + FILE *f; + f = fopen(filename, "rb"); + + if(f) { + struct stat st; + fstat(fileno(f), &st); + + off_t size = st.st_size; + if(size >= 84) { + fseek(f, 80, SEEK_SET); + + uint32_t num_tris; + fread(&num_tris, 4, 1, f); + uint64_t calced_size = 84+(4*12+2)*num_tris; + if(size != calced_size) { +// fprintf(stderr, " actual size: %10lld\n", size); +// fprintf(stderr, " num triangles: %10d\n", num_tris); +// fprintf(stderr, "calculated size: %10lld\n", calced_size); + return 0; + } + } else { + return 0; + } + } + + return 1; +}