polygon

commit 28b8fb3240e77f45ceaa9273523a113cea423b8f
parent c245dc6d19d6dcf3bfd032c9a8c48c9548b75add
Author: vaplv <vaplv@free.fr>
Date:   Sun, 21 Sep 2014 18:55:07 +0200

Add accessors to the polygon vertices

Diffstat:
M
src/polygon.c
 | 
20
++++++++++++++++++++
M
src/polygon.h
 | 
14
+++++++++++++-

2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/src/polygon.c b/src/polygon.c
@@ -294,6 +294,26 @@ error:
 }
 
 enum polygon_result
+polygon_vertices_count_get(const struct polygon* poly, uint32_t* nvertices)
+{
+  if(!poly || !nvertices) return POLYGON_BAD_ARGUMENT;
+  *nvertices = poly->nvertices;
+  return POLYGON_OK;
+}
+
+enum polygon_result
+polygon_vertex_get
+  (const struct polygon* poly, const uint32_t ivertex, float pos[3])
+{
+  const struct vertex_node* node;
+  if(!poly || !pos || ivertex >= poly->nvertices)
+    return POLYGON_BAD_ARGUMENT;
+  node = darray_vertex_node_cdata_get(&poly->pool) + ivertex;
+  f3_set(pos, node->pos);
+  return POLYGON_OK;
+}
+
+enum polygon_result
 polygon_triangulate
   (struct polygon* poly,
    const uint32_t** indices,
diff --git a/src/polygon.h b/src/polygon.h
@@ -67,9 +67,21 @@ polygon_vertex_add
    const float pos[3]);
 
 POLYGON_API enum polygon_result
+polygon_vertices_count_get
+  (const struct polygon* polygon,
+   uint32_t* nvertices);
+
+POLYGON_API enum polygon_result
+polygon_vertex_get
+  (const struct polygon* polygon,
+   const uint32_t ivertex,
+   float position[3]);
+
+POLYGON_API enum polygon_result
 polygon_triangulate
   (struct polygon* polygon,
-   const uint32_t** vertex_indices);
+   const uint32_t** indices,
+   uint32_t* indices_count);
 
 END_DECLS