From: Javier Sancho <jsf@jsancho.org>
Date: Tue, 28 Apr 2020 06:35:41 +0000 (+0200)
Subject: Optional parameters are SCM_UNDEFINED
X-Git-Url: https://git.jsancho.org/?a=commitdiff_plain;h=e793a98b7a84ae3a5ff2ededb0625e55cf991f0f;p=guile-irrlicht.git

Optional parameters are SCM_UNDEFINED
---

diff --git a/src/gui-in-out-fader.cpp b/src/gui-in-out-fader.cpp
index fb8a9e3..41dfc3f 100644
--- a/src/gui-in-out-fader.cpp
+++ b/src/gui-in-out-fader.cpp
@@ -44,7 +44,7 @@ extern "C" {
                                    SCM dest_color)
   {
     irr::gui::IGUIInOutFader* fader = unwrap_gui_in_out_fader (wrapped_in_out_fader);
-    if (scm_is_false (dest_color))
+    if (dest_color == SCM_UNDEFINED)
       {
         fader->setColor (scm_to_color (color));
       }
diff --git a/src/gui.cpp b/src/gui.cpp
index 997d28b..cd8eef3 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -147,7 +147,7 @@ extern "C" {
         // Params: color and dest_color (optional)
         return irr_gui_IGUIInOutFader_setColor (wrapped_obj, color, dest_color);
       }
-    else if (gui_skin_p (wrapped_obj) && !scm_is_false (dest_color))
+    else if (gui_skin_p (wrapped_obj) && dest_color != SCM_UNDEFINED)
       {
         // Params: which and new_color
         return irr_gui_IGUISkin_setColor (wrapped_obj, color, dest_color);
diff --git a/src/video-driver.cpp b/src/video-driver.cpp
index ef7dd57..85a720e 100644
--- a/src/video-driver.cpp
+++ b/src/video-driver.cpp
@@ -59,14 +59,14 @@ extern "C" {
   irr_video_beginScene (SCM wrapped_video_driver,
                         SCM rest)
   {
-    SCM back_buffer = scm_from_bool(1);
-    SCM z_buffer = scm_from_bool(1);
+    SCM back_buffer = SCM_BOOL_T;
+    SCM z_buffer = SCM_BOOL_T;
     SCM color = scm_list_4 (scm_from_uint32 (255),
                             scm_from_uint32 (0),
                             scm_from_uint32 (0),
                             scm_from_uint32 (0));
-    SCM video_data = scm_from_bool(0);
-    SCM source_rect = scm_from_bool(0);
+    SCM video_data = SCM_BOOL_F;
+    SCM source_rect = SCM_BOOL_F;
 
     scm_c_bind_keyword_arguments ("begin-scene", rest, (scm_t_keyword_arguments_flags)0,
                                   scm_from_utf8_keyword ("back-buffer"), &back_buffer,