Organization

include/TestGame/TestGameApp.hpp

@@ -7,6 +7,7 @@
 
 #include <JUI/Widgets/Slider.hpp>
 #include <JUI/Base/TextBase.hpp>
+#include <ranges>
 
 namespace TestGame
 {
@@ -100,44 +101,12 @@ namespace TestGame
     	/// This is performed after translating the origin to the center of the screen.
 	    void ApplyCameraTransformation();
 
-		void DrawLevel(const Level* level) const
-		{
-			for (const auto* layer : level->layers)
-			{
-				DrawLayer(layer);
-			}
-		}
+		void DrawLevel(const Level* level) const;
 
-    	/// Draw objects with the camera projection, as if they are in world-space.
-	    void DrawWorldSpace() {
+		/// Draw objects with the camera projection, as if they are in world-space.
+	    void DrawWorldSpace();
 
-			if (!data_ready) return; // Don't try to draw the level if not loaded.
-
-			DrawLevel(loaded_level);
-
-			for (auto* entity : entities) {
-				entity->Draw();
-			}
-		}
-
-		void Render() {
-			glClearColor(0, 0, 0, 1);
-			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-			J2D::Begin();
-			{
-				glPushMatrix();
-				{
-					ApplyCameraTransformation();
-					DrawWorldSpace();
-				}
-				glPopMatrix();
-			}
-
-			J2D::End();
-
-			scene->Draw();
-
-		}
+		void Render();
 
 #pragma region ReWindow Overrides
 		void OnRefresh(float elapsed) override

src/TestGame/TestGameApp.cpp

@@ -18,6 +18,22 @@ TestGame::TestGameAppWindow::~TestGameAppWindow() {
 
 }
 
+template <typename T>
+struct Range {
+    T min;
+    T max;
+};
+
+template <typename T>
+T map(T value, T in_min, T in_max, T out_min, T out_max) {
+    return (value - in_min) / (in_max - in_min) * (out_max - out_min) + out_min;
+}
+
+template <typename T>
+T map(T value, const Range<T>& in, const Range<T>& out) {
+    return map(value, in.min, in.max, out.min, out.max);
+}
+
 
 void TestGame::TestGameAppWindow::CreateUI() {
     using namespace JUI::UDimLiterals;
@@ -299,3 +315,41 @@ void TestGame::TestGameAppWindow::ApplyCameraTransformation() {
     glScalef(camera.scale.current, camera.scale.current, 1);
     glTranslatef(-camera.translation.current.x, -camera.translation.current.y, 0);
 }
+
+void TestGame::TestGameAppWindow::DrawLevel(const Level *level) const {
+    /// Draw top layers last.
+    for (const auto* layer : std::ranges::views::reverse(level->layers))
+    {
+        DrawLayer(layer);
+    }
+}
+
+void TestGame::TestGameAppWindow::DrawWorldSpace() {
+
+    if (!data_ready) return; // Don't try to draw the level if not loaded.
+
+    DrawLevel(loaded_level);
+
+    for (auto* entity : entities) {
+        entity->Draw();
+    }
+}
+
+void TestGame::TestGameAppWindow::Render() {
+    glClearColor(0, 0, 0, 1);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    J2D::Begin();
+    {
+        glPushMatrix();
+        {
+            ApplyCameraTransformation();
+            DrawWorldSpace();
+        }
+        glPopMatrix();
+    }
+
+    J2D::End();
+
+    scene->Draw();
+
+}