Scene change support

src/dawn/display/Transform.cpp

@@ -147,7 +147,7 @@ void Transform::setWorldTransform(glm::mat4 transform) {
 
 
 void Transform::setParent(Transform *parent) {
-  assertTrue(parent != this);
+  assertTrue(parent == nullptr || parent != this);
   
   auto currentParent = this->getParent();
   if(currentParent == parent) return;
@@ -190,6 +190,6 @@ Transform::~Transform() {
   auto it = this->children.begin();
   while(it != this->children.end()) {
     (*it)->setParent(nullptr);
-    ++it;
+    it = this->children.begin();
   }
 }

src/dawn/display/font/truetype/TrueTypeFaceTexture.cpp

@@ -32,6 +32,8 @@ TrueTypeFaceTexture::TrueTypeFaceTexture(
       assertUnreachable();
     }
 
+    if(face->glyph->bitmap.width == 0 || face->glyph->bitmap.rows == 0) continue;
+
     // Update the width and height
     w = mathMax<size_t>(w, face->glyph->bitmap.width);
     h += face->glyph->bitmap.rows;