scene linking works, yes! std::function didnt

src/engine/Scene.cpp

@@ -3,3 +3,9 @@
 //
 
 #include "Scene.h"
+
+#include <engine/gba_engine.h>
+
+void Scene::setEngineForSceneSwitching(GBAEngine *engine) {
+    this->engine = engine;
+}

src/engine/Scene.h

@@ -11,11 +11,13 @@
 #include "engine/sprites/sprite.h"
 #include "palette_manager.h"
 
+class GBAEngine;
+
 class Scene {
 protected:
     std::unique_ptr<ForegroundPaletteManager> foregroundPalette;
     std::unique_ptr<BackgroundPaletteManager> backgroundPalette;
-    std::function<void (Scene&)> onNextSceneFn;
+    GBAEngine* engine;
 
 public:
     ForegroundPaletteManager* getForegroundPalette() { return foregroundPalette.get(); }
@@ -26,8 +28,7 @@ public:
     virtual void load() = 0;
     virtual void tick(u16 i) = 0;
 
-    void onNextScene(std::function<void(Scene &)> fn) { onNextSceneFn = fn; };
-
+    void setEngineForSceneSwitching(GBAEngine* engine);
 
     Scene() { }
     ~Scene() {

src/engine/gba_engine.cpp

@@ -24,17 +24,18 @@ GBAEngine::GBAEngine() {
     Allocator::free();
 }
 
-void GBAEngine::setScene(Scene& scene) {
+void GBAEngine::setScene(Scene* scene) {
     if(this->currentScene) {
         cleanupPreviousScene();
+        TextStream::instance().clear();
     }
-    scene.load();
+    scene->load();
 
-    auto fgPalette = scene.getForegroundPalette();
+    auto fgPalette = scene->getForegroundPalette();
     if(fgPalette) {
         fgPalette->persist();
     }
-    auto bgPalette = scene.getBackgroundPalette();
+    auto bgPalette = scene->getBackgroundPalette();
     if(bgPalette) {
         bgPalette->persist();
     }
@@ -42,12 +43,12 @@ void GBAEngine::setScene(Scene& scene) {
     Allocator::free();
     TextStream::instance().persist();
 
-    spriteManager.set(scene.sprites());
+    spriteManager.set(scene->sprites());
     spriteManager.persist();
 
-    for(const auto bg : scene.backgrounds()) {
+    for(const auto bg : scene->backgrounds()) {
         bg->persist();
     }
 
-    this->currentScene = &scene;
+    this->currentScene = scene;
 }

src/engine/gba_engine.h

@@ -26,7 +26,7 @@ private:
 public:
     GBAEngine();
 
-    void setScene(Scene& scene);
+    void setScene(Scene* scene);
     u16 readKeys();
     void update();
     void delay(int times) {

src/flying_stuff_scene.cpp

@@ -5,6 +5,7 @@
 #include <engine/sprites/affine_sprite.h>
 #include <engine/sprites/sprite_builder.h>
 #include <engine/gba/tonc_memmap.h>
+#include <engine/background/text_stream.h>
 #include "flying_stuff_scene.h"
 #include "kul.h"
 
@@ -52,6 +53,8 @@ void FlyingStuffScene::load() {
             .withLocation(150, 60)
             .buildPtr();
 
+    TextStream::instance() << "level 1 ofwa" << "ziet da af";
+
     bg = std::unique_ptr<Background>(new Background(1, background_data, sizeof(background_data), map, sizeof(map)));
     bg.get()->useMapScreenBlock(16);
 }

src/main.cpp

@@ -15,14 +15,15 @@
  * assumes 8bpp sprites
  */
 int main() {
-    GBAEngine engine;
+    GBAEngine* engine = new GBAEngine();
 
-    SampleStartScene startScene;
-    engine.setScene(startScene);
+    SampleStartScene* startScene = new SampleStartScene();
+    startScene->setEngineForSceneSwitching(engine);
+    engine->setScene(startScene);
 
     while (true) {
-        engine.update();
-        engine.delay(1000);
+        engine->update();
+        engine->delay(1000);
     }
 
     return 0;

src/sample_start_scene.cpp

@@ -5,8 +5,10 @@
 #include <engine/sprites/sprite_builder.h>
 #include <engine/background/text_stream.h>
 #include <engine/gba/tonc_memdef.h>
+#include <engine/gba_engine.h>
 #include "sample_start_scene.h"
 #include "kul.h"
+#include "flying_stuff_scene.h"
 
 std::vector<Background *> SampleStartScene::backgrounds() {
     return {};
@@ -33,12 +35,14 @@ void SampleStartScene::load() {
             .withLocation(50, 50)
             .buildPtr();
 
-    TextStream::instance().clear();
     TextStream::instance().setText("PRESS START", 3, 8);
 }
 
 void SampleStartScene::tick(u16 keys) {
     if(keys & KEY_START) {
         TextStream::instance() << "entered: starting next scene";
+
+        FlyingStuffScene* nextScene = new FlyingStuffScene();
+        engine->setScene(nextScene);
     }
 }