Create FPS monitor

engine/src/main/java/com/bartlomiejpluta/base/core/stat/FPSMonitor.java

@@ -0,0 +1,7 @@
+package com.bartlomiejpluta.base.core.stat;
+
+import com.bartlomiejpluta.base.core.gc.Cleanable;
+import com.bartlomiejpluta.base.core.logic.Updatable;
+
+public interface FPSMonitor extends Updatable, Cleanable {
+}

engine/src/main/java/com/bartlomiejpluta/base/core/stat/LogFPSMonitor.java

@@ -0,0 +1,63 @@
+package com.bartlomiejpluta.base.core.stat;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import static java.util.Comparator.comparingInt;
+import static java.util.function.Function.identity;
+import static java.util.stream.Collectors.counting;
+import static java.util.stream.Collectors.groupingBy;
+
+@Slf4j
+@Component
+public class LogFPSMonitor implements FPSMonitor {
+   private static final int MOD = 30;
+   private final List<Double> values = new LinkedList<>();
+   private float fpsAccumulator = 0;
+   private int pointer = 0;
+   private double fps = 0;
+
+   @Override
+   public void update(float dt) {
+      fpsAccumulator += dt;
+
+      if (++pointer % MOD == 0) {
+         fps = pointer / fpsAccumulator;
+         fpsAccumulator = 0;
+         pointer = 0;
+
+         values.add(fps);
+      }
+   }
+
+   @Override
+   public void cleanUp() {
+      log.info("Min FPS: {}, max FPS: {}, avg FPS: {}",
+              values.stream().min(Double::compareTo).orElse(-1.0),
+              values.stream().max(Double::compareTo).orElse(-1.0),
+              totalAverage()
+      );
+      
+      printHistogram();
+   }
+
+   private double totalAverage() {
+      return values.stream().reduce(0.0, Double::sum) / values.size();
+   }
+
+   private void printHistogram() {
+      values
+              .stream()
+              .mapToInt(Double::intValue)
+              .boxed()
+              .collect(groupingBy(identity(), counting()))
+              .entrySet()
+              .stream()
+              .sorted(comparingInt(Map.Entry::getKey))
+              .forEach(e -> log.info("{} FPS: {}% ({} occurrences)", e.getKey(), e.getValue() * 100.0f / values.size(), e.getValue()));
+   }
+}

engine/src/main/java/com/bartlomiejpluta/base/core/ui/Window.java

@@ -5,6 +5,7 @@ import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.Setter;
+import org.joml.Vector2f;
 import org.lwjgl.glfw.GLFWErrorCallback;
 import org.lwjgl.glfw.GLFWVidMode;
 import org.lwjgl.opengl.GL;
@@ -76,7 +77,7 @@ public class Window {
       glfwMakeContextCurrent(windowHandle);
 
       // Enable V-Sync
-      glfwSwapInterval(1);
+//      glfwSwapInterval(1);
 
       // Make the window visible
       glfwShowWindow(windowHandle);
@@ -108,6 +109,10 @@ public class Window {
       return glfwWindowShouldClose(windowHandle);
    }
 
+   public Vector2f getSize() {
+      return new Vector2f(width, height);
+   }
+
    public static Window create(String title, int width, int height) {
       return new Window(title, -1, width, height, false);
    }

engine/src/main/java/com/bartlomiejpluta/base/core/util/math/MathUtil.java

@@ -1,5 +1,8 @@
 package com.bartlomiejpluta.base.core.util.math;
 
+import static java.lang.Math.max;
+import static java.lang.Math.min;
+
 public class MathUtil {
    public static int gcdEuclidean(int a, int b) {
       int x = a;
@@ -14,4 +17,16 @@ public class MathUtil {
 
       return x;
    }
+
+   public static int clamp(int value, int min, int max) {
+      return min(max, max(value, min));
+   }
+
+   public static float clamp(float value, float min, float max) {
+      return min(max, max(value, min));
+   }
+
+   public static double clamp(double value, double min, double max) {
+      return min(max, max(value, min));
+   }
 }

engine/src/main/java/com/bartlomiejpluta/base/core/world/map/GameMap.java

@@ -64,6 +64,10 @@ public class GameMap implements Renderable, Updatable {
       }
    }
 
+   public Vector2f getSize() {
+      return new Vector2f(columns * stepSize.x, rows * stepSize.y);
+   }
+
    public GameMap createObjectLayer() {
       var passageMap = new PassageAbility[rows][columns];
       for (int i = 0; i < rows; ++i) {

engine/src/main/java/com/bartlomiejpluta/base/core/world/map/TileLayer.java

@@ -31,11 +31,13 @@ public class TileLayer implements Layer {
    public void render(Window window, ShaderManager shaderManager) {
       for (var row : layer) {
          for (var tile : row) {
+            if (tile != null) {
                shaderManager.setUniform(UniformName.UNI_MODEL_MATRIX, tile.getModelMatrix());
                tile.render(window, shaderManager);
             }
          }
       }
+   }
 
    @Override
    public void update(float dt) {