examples/flappy_bird/flappy_bird.cpp

@@ -14,13 +14,15 @@
 #include <paradiso/vector.hpp>
 #include <paradiso/window.hpp>
 
-#include <unordered_map>
-
+#include <chrono>
 #include <iomanip>
 #include <iostream>
+#include <unordered_map>
 
 #include "lib/image_loader.hpp"
 
+const int frame_rate = 60;
+
 struct Background {
     paradiso::Sprite backgroundLeft;
     paradiso::Sprite backgroundRight;
@@ -57,7 +59,7 @@ struct Background {
             if (sprite->pivot.x() <= -2.0f) {
                 sprite->pivot.x() += 4.0f;
             }
-            sprite->pivot.x() -= 0.0006f;
+            sprite->pivot.x() -= 0.001f;
             shader.set_uniform("pivot", sprite->pivot);
             shader.set_uniform("scale", sprite->scale);
             shader.set_uniform("rotation", sprite->rotation);
@@ -91,7 +93,7 @@ struct Grass {
             if (sprite->pivot.x() <= -2.0f) {
                 sprite->pivot.x() += 4.0f;
             }
-            sprite->pivot.x() -= 0.005f;
+            sprite->pivot.x() -= 0.035f;
             shader.set_uniform("pivot", sprite->pivot);
             shader.set_uniform("scale", sprite->scale);
             shader.set_uniform("rotation", sprite->rotation);
@@ -114,10 +116,10 @@ struct FlappyBird {
     unsigned int flapCounter = 0; // How many ticks since last flap
 
     float velocity = 0.0f;
-    const float max_velocity = 0.02f;
+    const float max_velocity = 0.05f;
 
-    const float gravity = -0.0002f;
-    const float move_up_velocity = 0.0003f;
+    const float gravity = -0.004f;
+    const float move_up_velocity = 0.0055f;
 
     bool move_up = false;
     bool paused = true;
@@ -209,7 +211,7 @@ struct FlappyBird {
         }
 
         // Update rotation
-        rotation = velocity * 20.0f;
+        rotation = velocity * 15.0f;
     }
 
     // keyboard handler
@@ -270,6 +272,8 @@ auto main() -> int {
 
     auto flappyBird = FlappyBird{};
 
+    // timer
+
     // das update führt den hier mitgegebnen Ausdruck innerhalb der internen
     // Updates des Fensters auf. Es wird hier auch explizit ein bool gefordert
     // damit das update auch zu jederzeit unterbrochen werden kann
@@ -278,6 +282,7 @@ auto main() -> int {
             .position = paradiso::Point{.x = 0, .y = 0}, .size = size});
 
         ctx.clear();
+        auto t1 = std::chrono::high_resolution_clock::now();
 
         // Keyboard and state change
         flappyBird.on_keyboard(w.keyboard_input());
@@ -288,6 +293,13 @@ auto main() -> int {
         grass.draw(shader);
         flappyBird.draw(shader);
 
+        // wait for frame rate
+        auto t2 = std::chrono::high_resolution_clock::now();
+        auto duration =
+            std::chrono::duration_cast<std::chrono::microseconds>(t2 - t1);
+        auto wait = std::chrono::microseconds(1000000 / frame_rate) - duration;
+        std::this_thread::sleep_for(wait);
+
         // Quit
         return !(w.keyboard_input().size() &&
                  w.keyboard_input().top().key == 'Q');