star-meshtool

commit 3495b827f95a8200e6297fd7fdf7a6aeb1a323b1
parent 1d31ec18b4c3104e64ddb5ae14063c6255ad1e46
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Fri, 21 Mar 2025 11:27:11 +0100

Add new feature -r to revert the normals of the output mesh

Diffstat:
M
src/mtool.c
 | 
8
++++++++
M
src/mtool_actions.h
 | 
4
++--
M
src/mtool_args.c
 | 
6
+++++-
M
src/mtool_utils.c
 | 
2
+-

4 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/src/mtool.c b/src/mtool.c
@@ -33,6 +33,7 @@ main(int argc, char** argv)
   struct sstl* sstl = NULL;
   struct sstl_desc desc;
   struct sstl_write_data data;
+  size_t i;
   int allocator_initialized = 0;
   int logger_initialized = 0;
   int wbin;
@@ -91,6 +92,13 @@ main(int argc, char** argv)
   wbin = (ctx.b ? 1 : (ctx.a ? 0 : desc.read_type == SSTL_BINARY));
   ERR(sstl_pack_write_data(sstl, &data));
 
+  /* Revert normals if requiered */
+  if(ctx.r) {
+    for(i = 0; i < desc.triangles_count; i++) {
+      SWAP(unsigned, desc.indices[3*i], desc.indices[3*i+1]);
+    }
+  }
+
   /* Write data */
   if(ctx.in != NULL) {
     ERR(sstl_write(&data, wbin, ctx.out));
diff --git a/src/mtool_actions.h b/src/mtool_actions.h
@@ -40,13 +40,13 @@ struct actions {
 #include <rsys/dynamic_array.h>
 
 struct ctx {
-  int a, b, d, h, v, V;
+  int a, b, d, h, r, v, V;
   char *in, *out;
   struct darray_actions actions;
 };
 
 #define CTX_NULL__ \
-{ 0, 0, 0, 0, 0, 0, NULL, NULL, {NULL,0,0,NULL} }
+{ 0, 0, 0, 0, 0, 0, 0, NULL, NULL, {NULL,0,0,NULL} }
 
 res_T
 parse_args
diff --git a/src/mtool_args.c b/src/mtool_args.c
@@ -34,7 +34,7 @@ parse_args
 {
   int opt = 0;
   size_t len = 0;
-  const char option_list[] = "abdhi:o:S:T:vV:";
+  const char option_list[] = "abdhi:o:rS:T:vV:";
   res_T res = RES_OK;
 
   ASSERT(argv && ctx && logger && allocator);
@@ -82,6 +82,10 @@ parse_args
         ctx->out = optarg;
         break;
 
+      case 'r':
+        ctx->r = 1;
+        break;
+
       case 'S':
         {
           struct actions action;
diff --git a/src/mtool_utils.c b/src/mtool_utils.c
@@ -54,7 +54,7 @@ log_prt_fn
 void
 usage(FILE* stream)
 {
-  fprintf(stream, "mesh-tool [-abdIv] [-S sx,sy,sz]] [-T tx,ty,tz] [-V verbosity_level]\n");
+  fprintf(stream, "mesh-tool [-abdIrv] [-S sx,sy,sz]] [-T tx,ty,tz] [-V verbosity_level]\n");
 }
 
 void