fix bug in honey.shader.new and add basic primitives bindings

2 files changed, 29 insertions, 0 deletions

diff --git a/src/primitives/primitives.c b/src/primitives/primitives.c
index efc4a0f..1bfbe14 100644
--- a/src/primitives/primitives.c
+++ b/src/primitives/primitives.c
@@ -1,5 +1,31 @@
 #include "primitives.h"
 
+static int honey_mesh_lua_plane(lua_State* L)
+{
+    float width, height;
+    honey_lua_parse_arguments(L, 2,
+                              HONEY_NUMBER, &width,
+                              HONEY_NUMBER, &height);
+
+    honey_mesh* mesh = lua_newuserdata(L, sizeof(honey_mesh));
+    if (honey_mesh_new_textured_plane(mesh, width, height) != HONEY_OK) {
+        lua_pushstring(L, "error encountered while building plane");
+        lua_error(L);
+    }
+    return 1;
+}
+
+void honey_setup_primitives(lua_State* L)
+{
+    honey_lua_element primitive_elements[] = {
+        { "plane", HONEY_FUNCTION, { .function = honey_mesh_lua_plane } },
+    };
+
+    honey_lua_create_table(L, primitive_elements, 1);
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
 honey_result honey_mesh_new_textured_plane(honey_mesh* mesh,
                                            float width,
                                            float height) {
diff --git a/src/primitives/primitives.h b/src/primitives/primitives.h
index fbf7753..ff4b01b 100644
--- a/src/primitives/primitives.h
+++ b/src/primitives/primitives.h
@@ -9,6 +9,9 @@
 #include "../common.h"
 #include "../mesh/mesh.h"
 
+/** @brief Push table of lua bindings for creating primitives to the stack. */
+void honey_setup_primitives(lua_State* L);
+
 /** @brief Create a textured plane.
  *
  * This function creates a plane with vertex positions in attribute 0,