From 153e920eb83776d841bc0989879a2abb7ac3d685 Mon Sep 17 00:00:00 2001
From: Javier Sancho <jsf@jsancho.org>
Date: Sun, 15 Mar 2020 19:20:57 +0100
Subject: [PATCH] set-material-flag!

---
 configure.ac           |  1 +
 irrlicht/scene.scm     |  3 ++-
 src/guile-irrlicht.cpp |  2 ++
 src/material-flags.cpp | 25 +++++++++++++++++++++++++
 src/material-flags.h   |  8 ++++++++
 5 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index ca4d56d..9b85b9a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,7 @@ AM_PROG_AR
 AC_PROG_CXX
 LT_INIT
 
+PKG_CHECK_MODULES([GUILE], [guile-2.2])
 GUILE_SITE_DIR
 
 AC_CHECK_LIB(
diff --git a/irrlicht/scene.scm b/irrlicht/scene.scm
index 17437fe..1326783 100644
--- a/irrlicht/scene.scm
+++ b/irrlicht/scene.scm
@@ -20,7 +20,8 @@
 
 (define-module (irrlicht scene)
   #:export (add-animated-mesh-scene-node
-            get-mesh))
+            get-mesh
+            set-material-flag!))
 
 (load-extension "libguile-irrlicht" "init_guile_irrlicht")
 
diff --git a/src/guile-irrlicht.cpp b/src/guile-irrlicht.cpp
index a73a419..d80a5dc 100644
--- a/src/guile-irrlicht.cpp
+++ b/src/guile-irrlicht.cpp
@@ -27,6 +27,7 @@
 #include "gui-element.h"
 #include "gui-environment.h"
 #include "gui-static-text.h"
+#include "material-flags.h"
 #include "reference-counted.h"
 #include "scene-manager.h"
 #include "scene-node.h"
@@ -43,6 +44,7 @@ extern "C" {
     init_gui_element ();
     init_gui_environment ();
     init_gui_static_text ();
+    init_material_flag ();
     init_reference_counted ();
     init_scene_manager ();
     init_scene_node ();
diff --git a/src/material-flags.cpp b/src/material-flags.cpp
index df2c884..788a305 100644
--- a/src/material-flags.cpp
+++ b/src/material-flags.cpp
@@ -22,9 +22,34 @@
 #include <irrlicht/irrlicht.h>
 #include <libguile.h>
 #include "material-flags.h"
+#include "scene-node.h"
 
 extern "C" {
 
+  void
+  init_material_flag (void)
+  {
+    scm_c_define_gsubr ("set-material-flag!", 3, 0, 0, (scm_t_subr)irr_scene_setMaterialFlag);
+  }
+
+  SCM
+  irr_scene_setMaterialFlag (SCM wrapped_obj,
+                             SCM flag,
+                             SCM newvalue)
+  {
+    if (scene_node_p (wrapped_obj))
+      {
+        unwrap_scene_node (wrapped_obj)->setMaterialFlag (scm_to_material_flag (flag),
+                                                          scm_to_bool (newvalue));
+      }
+    else
+      {
+        scm_error (scm_arg_type_key, NULL, "Cannot set material flag for object: ~S",
+                   scm_list_1 (wrapped_obj), scm_list_1 (wrapped_obj));
+      }
+    return SCM_UNSPECIFIED;
+  }
+
   irr::video::E_MATERIAL_FLAG
   scm_to_material_flag (SCM material_flag)
   {
diff --git a/src/material-flags.h b/src/material-flags.h
index 1b1f053..77aa62b 100644
--- a/src/material-flags.h
+++ b/src/material-flags.h
@@ -27,6 +27,14 @@
 
 extern "C" {
 
+  void
+  init_material_flag (void);
+
+  SCM
+  irr_scene_setMaterialFlag (SCM wrapped_obj,
+                             SCM flag,
+                             SCM newvalue);
+
   irr::video::E_MATERIAL_FLAG
   scm_to_material_flag (SCM material_flag);
 
-- 
2.39.5