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@ -11,7 +11,9 @@ import javax.microedition.lcdui.*;
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*/
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public class DrawParticles extends Canvas implements Runnable {
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private static final int MAX_SNOW = 15;
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private static final int MIN_SPEED = 2;
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private static final int MAX_SPEED = 50;
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private static final int MAX_SNOW = 50;
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private int w, h;
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private int speed, wind;
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@ -21,13 +23,13 @@ public class DrawParticles extends Canvas implements Runnable {
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setFullScreenMode(true);
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w = getWidth();
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h = getHeight();
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speed = 1;
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wind = 0;
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speed = MIN_SPEED;
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wind = 250;
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Snow.setSpeed(speed);
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Snow.setWind(wind);
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particles = new Vector();
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for (int i = 0; i < 10; i++) {
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particles.addElement(new Snow(w, h-10*i, MAX_SNOW*i+MAX_SNOW/3, i+1));
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for (int i = 0; i < (h/64); i++) {
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particles.addElement(new Snow(w, h, MAX_SNOW));
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}
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new Thread(this).start();
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}
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@ -37,12 +39,17 @@ public class DrawParticles extends Canvas implements Runnable {
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g.fillRect(0, 0, w, h);
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// рисуем системы
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for (int i = 0; i < particles.size(); i++) {
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((ParticleSystem) particles.elementAt(i)).render(g, speed);
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((ParticleSystem) particles.elementAt(i)).render(g);
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}
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}
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public void run() {
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while(true) {
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if (Parameters.autoRotate) {
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wind += 5;
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if (wind > 360) wind = 0;
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}
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Snow.setWind(wind);
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repaint();
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try {
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Thread.sleep(20);
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@ -63,22 +70,22 @@ public class DrawParticles extends Canvas implements Runnable {
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switch (ga) {
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case UP:
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speed++;
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if (speed > 30) speed = 30;
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if (speed > MAX_SPEED) speed = MAX_SPEED;
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Snow.setSpeed(speed);
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break;
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case DOWN:
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speed--;
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if (speed < 1) speed = 1;
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if (speed < MIN_SPEED) speed = MIN_SPEED;
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Snow.setSpeed(speed);
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break;
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case RIGHT:
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wind++;
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if (wind > 10) wind = 10;
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if (wind > 360) wind = 0;
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Snow.setWind(wind);
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break;
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case LEFT:
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wind--;
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if (wind < -10) wind = -10;
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if (wind < 0) wind = 360;
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Snow.setWind(wind);
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break;
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}
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14
src/Parameters.java
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14
src/Parameters.java
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@ -0,0 +1,14 @@
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/*
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* aNNiMON 2011
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* For more info visit http://annimon.com/
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*/
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/**
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*
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* @author aNNiMON
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*/
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public class Parameters {
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/* Автоматическое вращение снежинок в 3D */
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public static boolean autoRotate = true;
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}
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@ -22,7 +22,7 @@ public abstract class ParticleSystem {
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}
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/* Отрисовка системы частиц */
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public void render(Graphics g, int speed) {
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public void render(Graphics g) {
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update(); // сначала обновляем частицы
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g.clipRect(window.x, window.y, window.w, window.h);
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draw(g); // затем только рисуем
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100
src/Snow.java
100
src/Snow.java
@ -11,20 +11,20 @@ import javax.microedition.lcdui.Graphics;
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*/
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public class Snow extends ParticleSystem {
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private static final float MIN_Z = 0.5f;
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private /*static final*/ int MAX_Z = 15;
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/* Скорость падения снега */
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private static int speed;
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/* Скорость и направление ветра */
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private static int wind;
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/* Направление ветра */
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private static float windAngle;
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/* Начальный угол отрисовки снежинки */
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private static float stAngle = 0;
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/* Слой снежинок по Z */
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private float zPosition;
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public Snow(int w, int h, int numOfParticles, float zPos) {
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public Snow(int w, int h, int numOfParticles) {
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super(0, 0, w, h, numOfParticles);
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if (zPos > 10) zPos = 10;
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zPosition = zPos+1;
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MAX_Z = w / 15;
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for (int i = 0; i < particles.length; i++) {
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particles[i] = addParticle();
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}
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@ -37,58 +37,88 @@ public class Snow extends ParticleSystem {
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/* Установка скорости и направления ветра */
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public static void setWind(int value) {
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wind = value;
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windAngle = (float) Math.toRadians(value);
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}
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/* Начальные свойства снежинки */
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protected Point3D resetParticle() {
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Point3D snow = new Point3D();
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snow.x = Util.random(window.x, window.w);
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snow.z = Util.random(1, MAX_Z);
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// if ((int)Util.random(0, 5) == 2) snow.z = Util.random(1, MAX_Z/2);
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// else snow.z = Util.random(MAX_Z/2, MAX_Z);
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int w_x = (int) (window.x / snow.z);
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int w_y = (int) (window.y / snow.z);
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int w_w = (int) (window.w * snow.z);
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int w_h = (int) (window.h * snow.z);
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snow.x = Util.random(w_x, w_w);
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// создаём снежинки за экраном
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snow.y = Util.random(window.y, window.h);
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snow.z = zPosition;
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snow.y = Util.random(w_y, w_h);
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return snow;
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}
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protected void update() {
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for (int i = 0; i < particles.length; i++) {
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particles[i].x = applyWind(particles[i].x); // ветер
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particles[i].x += Util.random(-1+Util.sign(wind), 1+Util.sign(wind)); // прочие параметры
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particles[i].y = particles[i].y + (speed / particles[i].z) + 0.981f; // скорость + притяжение
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if (particles[i].y > window.h) {
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if (wind > 0) particles[i].x = Util.random(window.x-wind*10, window.w);
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else if (wind < 0) particles[i].x = Util.random(window.x, window.w-wind*10);
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else particles[i].x = Util.random(window.x, window.w);
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particles[i].x += 2*Math.cos(windAngle);//applyWind(particles[i].x); // ветер по X
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particles[i].z += 0.01f*Math.sin(windAngle);//*Util.random(-1, 1); // ветер по Z
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//particles[i].x += Util.random(-1+Util.sign(wind), 1+Util.sign(wind)); // прочие параметры
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particles[i].y = particles[i].y + speed + 0.981f; // скорость + притяжение
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if (particles[i].z < MIN_Z) {
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particles[i].z = MAX_Z;
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particles[i].x = Util.random((int) (window.x / particles[i].z),
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(int) (window.h * particles[i].z));
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particles[i].y = window.y-Util.random(0, 10);
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} else if (particles[i].x > window.w) {
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if (wind > 0) particles[i].x = -Util.random(0, 10);
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} else if (particles[i].x < window.x) {
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if (wind < 0) particles[i].x = window.w+Util.random(0, 10);
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} else if (particles[i].z > MAX_Z) {
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particles[i].x = window.w + Util.random(0, 10);
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particles[i].y = Util.random((int) (window.y / particles[i].z),
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(int) (window.w * particles[i].z));
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particles[i].z = MIN_Z;
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}
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// if (particles[i].z < 1) particles[i].z = 1;
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// else if (particles[i].z > MAX_Z) particles[i].z = MAX_Z;
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int x = (int) (particles[i].x / particles[i].z);
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int y = (int) (particles[i].y / particles[i].z);
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int w_x = (int) (window.x / particles[i].z);
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int w_y = (int) (window.y / particles[i].z);
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int w_w = (int) (window.w * particles[i].z);
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int wind_x = (int) (2*Math.cos(windAngle));
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if (y > window.h) {
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if (wind_x > 0) particles[i].x = Util.random(w_x-wind_x*10, w_w);
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else if (wind_x < 0) particles[i].x = Util.random(w_x, w_w-wind_x*10);
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else particles[i].x = Util.random(w_x, w_w);
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particles[i].y = w_y - Util.random(0, 10);
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} else if (particles[i].x > w_w) {
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if (wind_x > 0) particles[i].x = w_x-Util.random(0, 10);
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} else if (x < w_x) {
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//if (wind < 0)
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particles[i].x = w_w+Util.random(0, 10);
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particles[i].y = Util.random((int) (window.y / particles[i].z),
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(int) (window.w * particles[i].z));
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}
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}
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}
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protected void draw(Graphics g) {
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g.setColor(Util.colorFromBrightness(255 - (int)((zPosition-1) * 12.7f)));
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for (int i = 0; i < particles.length; i++) {
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int x = (int) particles[i].x;
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int y = (int) particles[i].y;
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if (zPosition > 6) g.drawLine(x, y, x, y);
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else {
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int radius = (int) (8 - zPosition);
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drawSnow(g, x, y, radius);
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}
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if (particles[i].z < MIN_Z) continue;
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g.setColor(Util.colorFromBrightness(255 - (int)(particles[i].z * (128 / MAX_Z))));
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int x = (int) (particles[i].x / particles[i].z);
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int y = (int) (particles[i].y / particles[i].z);
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int radius = (int) (MAX_Z / particles[i].z);
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if (radius < 2) g.drawLine(x, y, x, y);
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else drawSnow(g, x, y, radius);
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}
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}
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private float applyWind(float x) {
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return (x + wind/5f);
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return (x + windAngle/5f);
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}
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private void drawSnow(Graphics g, int x, int y, int radius) {
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if (wind != 0) {
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stAngle = stAngle + Util.sign(wind) * 0.0004f*(speed+Math.abs(wind));
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if (Math.abs(stAngle) > 90) stAngle = Util.sign(wind);
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int wind_x = (int) (2*Math.cos(windAngle));
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if (Math.abs(wind_x) > 0.2f) {
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stAngle = stAngle + Util.sign(wind_x) * 0.0004f*(speed+Math.abs(wind_x));
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if (Math.abs(stAngle) > 90) stAngle = Util.sign(wind_x);
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}
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for (float i = stAngle/2; i <= 180; i += 45) {
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int cos = (int) (Math.cos(i)*radius);
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