ADDED: EXAMPLE: core_basic_screen_manager

examples/core/core_basic_screen_manager.c

@@ -0,0 +1,150 @@
+/*******************************************************************************************
+*
+*   raylib [core] examples - basic screen manager
+*
+*   This example illustrates a very simple screen manager based on a states machines
+*
+*   This test has been created using raylib 1.1 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2021 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------------
+// Types and Structures Definition
+//------------------------------------------------------------------------------------------
+typedef enum GameScreen { LOGO = 0, TITLE, GAMEPLAY, ENDING } GameScreen;
+
+//------------------------------------------------------------------------------------------
+// Main entry point
+//------------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic screen manager");
+
+    GameScreen currentScreen = LOGO;
+
+    // TODO: Initialize all required variables and load all required data here!
+
+    int framesCounter = 0;          // Useful to count frames
+
+    SetTargetFPS(60);               // Set desired framerate (frames-per-second)
+    //--------------------------------------------------------------------------------------
+    
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        switch(currentScreen) 
+        {
+            case LOGO: 
+            {
+                // TODO: Update LOGO screen variables here!
+
+                framesCounter++;    // Count frames
+
+                // Wait for 2 seconds (120 frames) before jumping to TITLE screen
+                if (framesCounter > 120)
+                {
+                    currentScreen = TITLE;
+                }
+            } break;
+            case TITLE: 
+            {
+                // TODO: Update TITLE screen variables here!
+
+                // Press enter to change to GAMEPLAY screen
+                if (IsKeyPressed(KEY_ENTER) || IsGestureDetected(GESTURE_TAP))
+                {
+                    currentScreen = GAMEPLAY;
+                }
+            } break;
+            case GAMEPLAY:
+            { 
+                // TODO: Update GAMEPLAY screen variables here!
+
+                // Press enter to change to ENDING screen
+                if (IsKeyPressed(KEY_ENTER) || IsGestureDetected(GESTURE_TAP))
+                {
+                    currentScreen = ENDING;
+                } 
+            } break;
+            case ENDING: 
+            {
+                // TODO: Update ENDING screen variables here!
+
+                // Press enter to return to TITLE screen
+                if (IsKeyPressed(KEY_ENTER) || IsGestureDetected(GESTURE_TAP))
+                {
+                    currentScreen = TITLE;
+                }  
+            } break;
+            default: break;
+        }
+        //----------------------------------------------------------------------------------
+        
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+            ClearBackground(RAYWHITE);
+            
+            switch(currentScreen) 
+            {
+                case LOGO: 
+                {
+                    // TODO: Draw LOGO screen here!
+                    DrawText("LOGO SCREEN", 20, 20, 40, LIGHTGRAY);
+                    DrawText("WAIT for 2 SECONDS...", 290, 220, 20, GRAY);
+                    
+                } break;
+                case TITLE: 
+                {
+                    // TODO: Draw TITLE screen here!
+                    DrawRectangle(0, 0, screenWidth, screenHeight, GREEN);
+                    DrawText("TITLE SCREEN", 20, 20, 40, DARKGREEN);
+                    DrawText("PRESS ENTER or TAP to JUMP to GAMEPLAY SCREEN", 120, 220, 20, DARKGREEN);
+                    
+                } break;
+                case GAMEPLAY:
+                { 
+                    // TODO: Draw GAMEPLAY screen here!
+                    DrawRectangle(0, 0, screenWidth, screenHeight, PURPLE);
+                    DrawText("GAMEPLAY SCREEN", 20, 20, 40, MAROON);
+                    DrawText("PRESS ENTER or TAP to JUMP to ENDING SCREEN", 130, 220, 20, MAROON);
+
+                } break;
+                case ENDING: 
+                {
+                    // TODO: Draw ENDING screen here!
+                    DrawRectangle(0, 0, screenWidth, screenHeight, BLUE);
+                    DrawText("ENDING SCREEN", 20, 20, 40, DARKBLUE);
+                    DrawText("PRESS ENTER or TAP to RETURN to TITLE SCREEN", 120, 220, 20, DARKBLUE);
+                    
+                } break;
+                default: break;
+            }
+        
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    
+    // TODO: Unload all loaded data (textures, fonts, audio) here!
+    
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}