Добавил вторую главу занимательного программирования

Занимательное программирование/2/4_fading_in/core/build.gradle

@@ -0,0 +1,5 @@
+[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
+
+sourceSets.main.java.srcDirs = [ "src/" ]
+
+eclipse.project.name = appName + "-core"

Занимательное программирование/2/4_fading_in/core/src/net/caraus/fadein/FadeIn.java

@@ -0,0 +1,84 @@
+package net.caraus.fadein;
+
+import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.files.FileHandle;
+import com.badlogic.gdx.graphics.Pixmap;
+import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.Pixmap.Format;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.badlogic.gdx.utils.ScreenUtils;
+
+public class FadeIn extends ApplicationAdapter {
+	SpriteBatch batch;
+
+	Texture etalonTexture;
+    Pixmap etalon;
+
+    Pixmap pixmap;
+    Texture img;
+    int[][][] buffer;
+	
+	@Override
+	public void create () {
+		batch = new SpriteBatch();
+
+        FileHandle fileHandle = Gdx.files.internal("badlogic.bmp");
+        etalon = new Pixmap(fileHandle);
+		etalonTexture = new Texture(etalon);
+
+        pixmap = new Pixmap(etalon.getWidth(), etalon.getHeight(), Format.RGB888);
+        buffer = new int[etalon.getWidth()][etalon.getHeight()][3];
+        for (int i = 0; i < pixmap.getWidth(); ++i) {
+            for (int j = 0; j < pixmap.getHeight(); ++j) {
+                buffer[i][j][0] = 0xff;
+                buffer[i][j][1] = 0xff;
+                buffer[i][j][2] = 0xff;
+            }
+        }
+        img = new Texture(pixmap);
+	}
+
+	@Override
+	public void render () {
+		ScreenUtils.clear(1, 0, 0, 1);
+
+        for (int i = 0; i < pixmap.getWidth(); ++i) {
+            for (int j = 0; j < pixmap.getHeight(); ++j) {
+                int etalonPixel = etalon.getPixel(i, j);
+
+                int etalonRed = (etalonPixel >> 24) & 0xff;
+                int etalonGreen = (etalonPixel >> 16) & 0xff;
+                int etalonBlue = (etalonPixel >> 8) & 0xff;
+
+                if (etalonRed < buffer[i][j][0]) {
+                    --buffer[i][j][0];
+                }
+                if (etalonGreen < buffer[i][j][1]) {
+                    --buffer[i][j][1];
+                }
+                if (etalonBlue < buffer[i][j][2]) {
+                    --buffer[i][j][2];
+                }
+                pixmap.setColor((buffer[i][j][0] << 24) | (buffer[i][j][1] << 16) | (buffer[i][j][2] << 8) | 0xff);
+                pixmap.drawPixel(i, j);
+            }
+        }
+        img.draw(pixmap, 0, 0);
+
+		batch.begin();
+		batch.draw(etalonTexture, 0, 0);
+		batch.draw(img, etalon.getWidth() + 15, 0);
+		batch.end();
+	}
+	
+	@Override
+	public void dispose () {
+		batch.dispose();
+		etalonTexture.dispose();
+        etalon.dispose();
+
+        img.dispose();
+        pixmap.dispose();
+	}
+}