Init GUI #1

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/GUI.java

@@ -0,0 +1,7 @@
+package com.bartlomiejpluta.base.api.game.gui;
+
+import com.bartlomiejpluta.base.api.internal.logic.Updatable;
+import com.bartlomiejpluta.base.api.internal.render.Renderable;
+
+public interface GUI extends Updatable, Renderable {
+}

engine/src/main/java/com/bartlomiejpluta/base/engine/core/gl/render/DefaultRenderer.java

@@ -51,7 +51,7 @@ public class DefaultRenderer implements Renderer {
    }
 
    private void clear() {
-      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
    }
 
    private void updateViewport(Screen screen) {

engine/src/main/java/com/bartlomiejpluta/base/engine/ui/GLFWScreen.java

@@ -97,6 +97,9 @@ public class GLFWScreen implements Screen {
       // Make the OpenGL context current
       glfwMakeContextCurrent(windowHandle);
 
+      // Enable antialiasing
+      glfwWindowHint(GLFW_SAMPLES, 4);
+
       // Enable V-Sync
       // glfwSwapInterval(1);
 
@@ -109,6 +112,9 @@ public class GLFWScreen implements Screen {
       glEnable(GL_BLEND);
       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
+      // Required by GUI
+      glEnable(GL_STENCIL_TEST);
+
       // Set the clear color
       clear(0.0f, 0.0f, 0.0f, 0.0f);
    }