commit e75944fbe02a1e54592ff378017a3c6dc632968f
Author: Victor <annimon119@gmail.com>
Date:   Wed Nov 14 23:02:34 2018 +0200

    1

diff --git a/src/DrawParticles.java b/src/DrawParticles.java
new file mode 100644
index 0000000..b4ba9c3
--- /dev/null
+++ b/src/DrawParticles.java
@@ -0,0 +1,91 @@
+/*
+ * aNNiMON 2011
+ * For more info visit http://annimon.com/
+ */
+
+import java.util.Vector;
+import javax.microedition.lcdui.*;
+
+/**
+ * @author aNNiMON
+ */
+public class DrawParticles extends Canvas implements Runnable {
+    
+    private static final int MAX_SNOW = 15;
+    
+    private int w, h;
+    private int speed, wind;
+    private Vector particles;
+    
+    public DrawParticles() {
+        setFullScreenMode(true);
+        w = getWidth();
+        h = getHeight();
+        speed = 1;
+        wind = 0;
+        Snow.setSpeed(speed);
+        Snow.setWind(wind);
+        particles = new Vector();
+        for (int i = 0; i < 10; i++) {
+            particles.addElement(new Snow(w, h-10*i, MAX_SNOW*i+MAX_SNOW/3, i+1));
+        }
+        new Thread(this).start();
+    }
+    
+    public void paint(Graphics g) {
+        g.setColor(0);//xFF2895B9);
+        g.fillRect(0, 0, w, h);
+        // рисуем системы
+        for (int i = 0; i < particles.size(); i++) {
+            ((ParticleSystem) particles.elementAt(i)).render(g, speed);
+        }
+    }
+    
+    public void run() {
+        while(true) {
+            repaint();
+            try {
+                Thread.sleep(20);
+            } catch (InterruptedException ex) {
+                ex.printStackTrace();
+            }
+        }
+    }
+    
+    protected void sizeChanged(int w, int h) {
+        this.w = getWidth();
+        this.h = getHeight();
+        super.sizeChanged(w, h);
+    }
+    
+    protected void keyPressed(int key) {
+        int ga = getGameAction(key);
+        switch (ga) {
+            case UP:
+                speed++;
+                if (speed > 30) speed = 30;
+                Snow.setSpeed(speed);
+                break;
+            case DOWN:
+                speed--;
+                if (speed < 1) speed = 1;
+                Snow.setSpeed(speed);
+                break;
+            case RIGHT:
+                wind++;
+                if (wind > 10) wind = 10;
+                Snow.setWind(wind);
+                break;
+            case LEFT:
+                wind--;
+                if (wind < -10) wind = -10;
+                Snow.setWind(wind);
+                break;
+        }
+    }
+    
+    protected void keyRepeated(int key) {
+        keyPressed(key);
+    }
+
+}
diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..cf1455d
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,33 @@
+/*
+ * aNNiMON 2011
+ * For more info visit http://annimon.com/
+ */
+
+import javax.microedition.lcdui.*;
+import javax.microedition.midlet.*;
+
+/**
+ * @author aNNiMON
+ */
+public class Main extends MIDlet {
+    
+    public Display dsp;
+    public static Main midlet;
+    
+    public Main() {
+        midlet = Main.this;
+        dsp = Display.getDisplay(Main.this);
+    }
+    
+    public void startApp() {
+        DrawParticles dp = new DrawParticles();
+        dsp.setCurrent(dp);
+    }
+    
+    public void pauseApp() {
+    }
+    
+    public void destroyApp(boolean ex) {
+        notifyDestroyed();
+    }
+}
diff --git a/src/ParticleSystem.java b/src/ParticleSystem.java
new file mode 100644
index 0000000..4f17bee
--- /dev/null
+++ b/src/ParticleSystem.java
@@ -0,0 +1,60 @@
+
+import javax.microedition.lcdui.Graphics;
+
+/*
+ * aNNiMON 2011
+ * For more info visit http://annimon.com/
+ */
+
+/**
+ * Базовый класс системы частиц
+ * @author aNNiMON
+ */
+public abstract class ParticleSystem {
+    
+    /* Массив частицы */
+    protected Point3D[] particles;
+    protected Rectangle window;
+    
+    public ParticleSystem(int x, int y, int w, int h, int numOfParticles) {
+        window = new Rectangle(x, y, w, h);
+        particles = new Point3D[numOfParticles];
+    }
+    
+    /* Отрисовка системы частиц */
+    public void render(Graphics g, int speed) {
+        update(); // сначала обновляем частицы
+        g.clipRect(window.x, window.y, window.w, window.h);
+        draw(g); // затем только рисуем
+    }
+    
+    /* Добавление частицы */
+    protected Point3D addParticle() {
+        return resetParticle();
+    }
+    
+    /* Сброс свойств частицы */
+    protected abstract Point3D resetParticle();
+    /* Обновление свойств частиц */
+    protected abstract void update();
+    /* Отрисовка частиц */
+    protected abstract void draw(Graphics g);
+    
+    /* Точка в 3D */
+    protected class Point3D {
+        float x, y, z;
+        int color;
+    }
+    
+    /* Прямоугольник */
+    protected class Rectangle {
+        int x, y, w, h;
+
+        public Rectangle(int x, int y, int w, int h) {
+            this.x = x;
+            this.y = y;
+            this.w = w;
+            this.h = h;
+        }
+    }
+}
diff --git a/src/Snow.java b/src/Snow.java
new file mode 100644
index 0000000..9b5ef7f
--- /dev/null
+++ b/src/Snow.java
@@ -0,0 +1,99 @@
+
+import javax.microedition.lcdui.Graphics;
+
+/*
+ * aNNiMON 2011
+ * For more info visit http://annimon.com/
+ */
+
+/**
+ * @author aNNiMON
+ */
+public class Snow extends ParticleSystem {
+
+    /* Скорость падения снега */
+    private static int speed;
+    /* Скорость и направление ветра */
+    private static int wind;
+    /* Начальный угол отрисовки снежинки */
+    private static float stAngle = 0;
+    
+    /* Слой снежинок по Z */
+    private float zPosition;
+    
+    public Snow(int w, int h, int numOfParticles, float zPos) {
+        super(0, 0, w, h, numOfParticles);
+        if (zPos > 10) zPos = 10;
+        zPosition = zPos+1;
+        for (int i = 0; i < particles.length; i++) {
+            particles[i] = addParticle();
+        }
+    }
+    
+    /* Установка скорости падения снега */
+    public static void setSpeed(int value) {
+        speed = value;
+    }
+
+    /* Установка скорости и направления ветра */
+    public static void setWind(int value) {
+        wind = value;
+    }
+    
+    /* Начальные свойства снежинки */
+    protected Point3D resetParticle() {
+        Point3D snow = new Point3D();
+        snow.x = Util.random(window.x, window.w);
+        // создаём снежинки за экраном
+        snow.y = Util.random(window.y, window.h);
+        snow.z = zPosition;
+        return snow;
+    }
+
+    protected void update() {
+        for (int i = 0; i < particles.length; i++) {
+            particles[i].x = applyWind(particles[i].x); // ветер
+            particles[i].x += Util.random(-1+Util.sign(wind), 1+Util.sign(wind)); // прочие параметры
+            particles[i].y = particles[i].y + (speed / particles[i].z) + 0.981f; // скорость + притяжение
+            if (particles[i].y > window.h) {
+                if (wind > 0) particles[i].x = Util.random(window.x-wind*10, window.w);
+                else if (wind < 0) particles[i].x = Util.random(window.x, window.w-wind*10);
+                else particles[i].x = Util.random(window.x, window.w);
+                particles[i].y = window.y - Util.random(0, 10);
+            } else if (particles[i].x > window.w) {
+                if (wind > 0) particles[i].x = -Util.random(0, 10);
+            } else if (particles[i].x < window.x) {
+                if (wind < 0) particles[i].x = window.w+Util.random(0, 10);
+            }
+        }
+    }
+
+    protected void draw(Graphics g) {
+        g.setColor(Util.colorFromBrightness(255 - (int)((zPosition-1) * 12.7f)));
+        for (int i = 0; i < particles.length; i++) {
+            int x = (int) particles[i].x;
+            int y = (int) particles[i].y;
+            if (zPosition > 6) g.drawLine(x, y, x, y);
+            else {
+                int radius = (int) (8 - zPosition);
+                drawSnow(g, x, y, radius);
+            }
+        }
+    }
+    
+    private float applyWind(float x) {
+        return (x + wind/5f);
+    }
+    
+    private void drawSnow(Graphics g, int x, int y, int radius) {
+        if (wind != 0) {
+            stAngle = stAngle + Util.sign(wind) * 0.0004f*(speed+Math.abs(wind));
+            if (Math.abs(stAngle) > 90) stAngle = Util.sign(wind);
+        }
+        for (float i = stAngle/2; i <= 180; i += 45) {
+            int cos = (int) (Math.cos(i)*radius);
+            int sin = (int) (Math.sin(i)*radius);
+            g.drawLine(x-cos, y-sin, x+cos, y+sin);
+        }
+    }
+}
diff --git a/src/Util.java b/src/Util.java
new file mode 100644
index 0000000..9ee5b52
--- /dev/null
+++ b/src/Util.java
@@ -0,0 +1,37 @@
+
+import java.util.Random;
+
+/*
+ * aNNiMON 2011
+ * For more info visit http://annimon.com/
+ */
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Util {
+    
+    private static final Random rnd = new Random();
+    
+    /**
+     * Получить цвет ARGB из яркости. Оттенки серого.
+     * @param value яркость
+     * @return ARGB цвет
+     */
+    public static int colorFromBrightness(int value) {
+        return 0xFF000000 | (value << 16) | (value << 8) | (value);
+    }
+    
+    /* Получить случайное float значение в промежутке (from; to) */
+    public static float random(int from, int to) {
+        return rnd.nextInt(to-from)+from+rnd.nextFloat();
+    }
+    
+    /* Возвращает знак числа */
+    public static int sign(int number) {
+        if (number > 0) return 1;
+        else if (number < 0) return -1;
+        else return 0;
+    }
+}