check for system fonts

Engine.cpp

@@ -32,9 +32,9 @@ void Engine::setupScene()
 
     // Setup Camera
     // (so z-forward characters face camera partially (formerly vector3df( 0, 0, -10 ), vector3df())
-    tmpPosVec3f = vector3df( 4.5, 3, 9 );
-    tmpTargetVec3f = vector3df(0, 3, 0);
-    ICameraSceneNode *camera = m_Scene->addCameraSceneNode(nullptr, tmpPosVec3f, tmpTargetVec3f); // this will be overridden by View m_Yaw and m_Pitch--see "calculate m_Yaw" further down
+    m_CamPos = vector3df( 4.5, 3, 9 );
+    m_CamTarget = vector3df(0, 3, 0);
+    ICameraSceneNode *camera = m_Scene->addCameraSceneNode(nullptr, m_CamPos, m_CamTarget); // this will be overridden by View m_Yaw and m_Pitch--see "calculate m_Yaw" further down
     camera->setAspectRatio((f32)m_Driver->getScreenSize().Width / m_Driver->getScreenSize().Height);
 }
 
@@ -165,7 +165,8 @@ Engine::Engine()
 
     // Load font for displaying Axis names
     m_AxisFontFace = new CGUITTFace();
-    if (m_AxisFontFace->load( "ClearSansRegular.ttf" )) {
+    // NOTE: m_FontPath is modified y UserInterface constructor above if font was missing
+    if (m_AxisFontFace->load(m_FontPath.c_str())) {
         m_AxisFont = new CGUITTFont( m_UserInterface->getGUIEnvironment() );
         m_AxisFont->attach( m_AxisFontFace, 14 );
         m_AxisFont->AntiAlias = false;

Engine.h

@@ -60,8 +60,9 @@ private:
 //    irr::video::SMaterial *lineX;
 //    irr::video::SMaterial *lineY;
 //    irr::video::SMaterial *lineZ;
-    irr::core::vector3df tmpPosVec3f;
-    irr::core::vector3df tmpTargetVec3f;
+    irr::core::vector3df m_CamPos;
+    irr::core::vector3df m_CamTarget;
+    std::wstring m_FontPath = L"ClearSansRegular.ttf";  // core::stringc has implicit conversion to io::path
 
 public:
     std::wstring m_PreviousPath;

README.md

@@ -68,7 +68,13 @@ only applies to Visual Studio users.)
   if your build directory is not `./build`
 * (optional) Copy your favorite public-licensed font over
   `./build/ClearSansRegular.tff` or to current working directory of
-  program (unpredictable on Linux when you double-click files)
+  program (varies on Linux when you double-click files). If you don't,
+  and didn't copy the included one to the output directory,
+  the following fonts will be tried, in the following order:
+  * C:\Windows\Fonts: calibrib.ttf, arialbd.ttf
+  * /usr/share/fonts: liberation/LiberationSans-Bold.ttf,
+    gnu-free/FreeSansBold.ttf, dejavu/DejaVuSans-Bold.ttf,
+    google-droid/DroidSans-Bold.ttf
 
 ## Install
 ### Windows
@@ -122,6 +128,8 @@ only applies to Visual Studio users.)
 ## Known Issues
 * Warn on missing texture.
 * Test and complete install.bat on Windows.
+* Look for fonts on OS X (see "Set Font for UI Elements" in
+  UserInterface.cpp).
 
 ## Authors
 * ClearSansRegular.ttf (**Apache 2.0 License**) by Intel

UserInterface.cpp

@@ -81,15 +81,33 @@ void UserInterface::setupUserInterface()
     // Set Font for UI Elements
     m_GuiFontFace = new CGUITTFace();
     // irrString defines stringc as string<c8>
-    std::wstring fontPath = L"ClearSansRegular.ttf";  // core::stringc has implicit conversion to io::path
     // if (QFile(fontPath).exists()) {}
-    if (m_GuiFontFace->load(fontPath.c_str())) {  // actually takes `const io::path &`
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"C:\\Windows\\Fonts\\calibrib.ttf";
+    }
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"C:\\Windows\\Fonts\\arialbd.ttf";
+    }
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"/usr/share/fonts/gnu-free/FreeSansBold.ttf";
+    }
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"/usr/share/fonts/liberation/LiberationSans-Bold.ttf";
+    }
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"/usr/share/fonts/dejavu/DejaVuSans-Bold.ttf";
+    }
+    if (!Utility::isFile(m_Engine->m_FontPath)) {
+        m_Engine->m_FontPath = L"/usr/share/fonts/google-droid/DroidSans-Bold.ttf";
+    }
+
+    if (m_GuiFontFace->load(m_Engine->m_FontPath.c_str())) {  // actually takes `const io::path &`
         m_GuiFont = new CGUITTFont( m_Gui );
         m_GuiFont->attach( m_GuiFontFace, 14 );
         m_Gui->getSkin()->setFont( m_GuiFont );
     }
     else {
-        std::wcerr << L"WARNING: Missing '" << fontPath << L"'" << endl;
+        std::wcerr << L"WARNING: Missing '" << m_Engine->m_FontPath << L"'" << endl;
         delete m_GuiFontFace;
         m_GuiFontFace = nullptr;
         if (m_GuiFont != nullptr) {

View.cpp

@@ -54,9 +54,9 @@ View::View( Engine *engine )
 
     // vectors for angle are opposite, since camera revolves around center
     vector3df offsetVec3(
-        engine->tmpPosVec3f.X-engine->tmpTargetVec3f.X,
-        engine->tmpPosVec3f.Y-engine->tmpTargetVec3f.Y,
-        engine->tmpPosVec3f.Z-engine->tmpTargetVec3f.Z
+        engine->m_CamPos.X-engine->m_CamTarget.X,
+        engine->m_CamPos.Y-engine->m_CamTarget.Y,
+        engine->m_CamPos.Z-engine->m_CamTarget.Z
     );
     // m_CameraDistance = sqrtf()
     m_CameraDistance = offsetVec3.getLength();