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// Copyright (c) 2003-2012, Jodd Team (jodd.org). All Rights Reserved.

package jodd.plasma;

import jodd.gfx.FpsMonitor;
import jodd.gfx.GfxPanel;
import jodd.gfx.Palette;
import jodd.gfx.Sprite;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

public class Plasma extends GfxPanel implements KeyListener {

FpsMonitor fpsMonitor = new FpsMonitor();
Palette pal = new Palette(256);
Font logoFont = new Font("Tahoma", Font.PLAIN, 10);
Sprite panel = new Sprite(260, 50, Sprite.COLOR_ARGB);
Font panelFont = new Font("Arial", Font.BOLD, 40);
FontMetrics panelfm = getFontMetrics(panelFont);

@Override
public void init() {
this.width = 320;
this.height = 240;
this.framerate = 30;
this.name = "Jodd Plasma";
}

@Override
public void ready() {
addKeyListener(this);
palOne();
plasmaInit();
panel.g2d.setFont(panelFont);
panel.g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
screen.g2d.setColor(new Color(0, 0, 0x50));
screen.g2d.setFont(logoFont);
}

// ---------------------------------------------------------------- update

int txtx = 400;
int panelx = 400;

@Override
public void update() {
if (txtx < -380) {
// out
if (panelx < 320) {
panelx += 8;
}

} else {
// in
if (panelx > 60) {
panelx -= 4;
}
if (panelx < 320) {
txtx -= 2;
}
}
plasmaDraw(screen.buf);
}

// ---------------------------------------------------------------- paint

@Override
public void paint() {
fpsMonitor.monitor();
screen.g2d.drawString("jodd gfx " + fpsMonitor.getFps(), 3, 236);
drawPanel();
if (panelx < 320) {
screen.g2d.drawImage(panel.img, panelx, 60, null);
}
}

// ---------------------------------------------------------------- draw panel

char[] message = "enjoy jodd plasma :)".toCharArray();

void drawPanel() {
for (int i = 0; i < panel.size; i++) {
panel.buf[i] = 0x99FF0000;
}
Graphics2D g2d = panel.g2d;

// letters
int x = txtx;
if (panelx <= 60) {
g2d.setColor(Color.WHITE);
for (char msg : message) {
int lw = panelfm.charWidth(msg);
g2d.drawString(String.valueOf(msg), x, 37);
x += lw;
}
}
// rect
g2d.setColor(new Color(0xFF990000));
g2d.drawRect(0, 0, panel.width - 1, panel.height - 1);
}

// ---------------------------------------------------------------- key listener

public void keyPressed(KeyEvent key) {
char k = key.getKeyChar();
switch (k) {
case '1': palOne(); break;
case '2': palReds(); break;
}
}

public void keyReleased(KeyEvent ignore) {}

public void keyTyped(KeyEvent ignore) {}

// ---------------------------------------------------------------- palettes

void palOne() {
pal.gradientFill(0, 128, 0x174185, 0xFFFFFF);
pal.gradientFill(128, 255, 0xFFFFFF, 0x174185);
}

void palReds() {
pal.gradientFill(0, 128, 0xCC0000, 0x550000);
pal.gradientFill(128, 255, 0x550000, 0xCC0000);
}

// ---------------------------------------------------------------- plasma engine

int[] tab1 = new int[320 * 240];
int[] tab2 = new int[320 * 240];
float circle1, circle2, circle3, circle4, circle5, circle6, circle7, circle8;
int roll;

/**
* Initializes plasma arrays.
*/
void plasmaInit() {
for (int i = 0; i < 240; i++) {
for (int j = 0; j < 320; j++) {
tab1[(i * 320) + j] = (int) ((Math.sqrt(16.0 + (120 - i) * (120 - i) + (160 - j) * (160 - j)) - 4) * 5);
}
}

for (int i = 0; i < 240; i++) {
for (int j = 0; j < 320; j++) {
double temp = Math.sqrt(16.0 + (120 - i) * (120 - i) + (160 - j) * (160 - j)) - 4;
tab2[(i * 320) + j] = (int) ((Math.sin(temp / 9.5) + 1) * 90);
}
}
circle1 = circle2 = circle3 = circle4 = circle5 = circle6 = circle7 = circle8 = 0;
roll = 0;
}


/**
* Draws current plasma on screen.
*/
void plasmaDraw(int[] dest) {
int i, j, k;
int x1, y1, x2, y2, x3, y3, x4, y4;
int c;

circle1 += 0.085 / 6;
circle2 -= 0.1 / 6;
circle3 += 0.3 / 6;
circle4 -= 0.2 / 6;
circle5 += 0.4 / 6;
circle6 -= 0.15 / 6;
circle7 += 0.35 / 6;
circle8 -= 0.05 / 6;
x2 = (int) ((320 / 4) + (320 / 4) * Math.sin(circle1)); // 0 - 160
y2 = (int) ((240 / 4) + (240 / 4) * Math.cos(circle2)); // 0 - 120
x1 = (int) ((320 / 4) + (320 / 4) * Math.cos(circle3));
y1 = (int) ((240 / 4) + (240 / 4) * Math.sin(circle4));
x3 = (int) ((320 / 4) + (320 / 4) * Math.cos(circle5));
y3 = (int) ((200 / 4) + (200 / 4) * Math.sin(circle6));
x4 = (int) ((320 / 4) + (320 / 4) * Math.cos(circle7));
y4 = (int) ((200 / 4) + (200 / 4) * Math.sin(circle8));

roll += 5;
k = 0;

for (i = 0; i < 120; i++) {
for (j = 0; j < 160; j++) {
c = tab1[320 * (i + y1) + j + x1] +
tab1[320 * (i + y2) + j + x2] +
tab2[320 * (i + y3) + j + x3] +
tab2[320 * (i + y4) + j + x4] + roll;
c = pal.getColor(c & 0xFF);
dest[k + 2 * j] = c;
dest[k + 2 * j + 1] = c;
dest[k + 2 * j + 320] = c;
dest[k + 2 * j + 321] = c;
}
k += 640;
}
}
}

Change log

r825 by igor.spasic on Dec 6, 2011   Diff
copyright 2012 (yeah, a bit early;)
Go to: 

Older revisions

r404 by najgor on Jan 9, 2011   Diff
2011 year in copyright change
r278 by najgor on Mar 25, 2010   Diff
plasma - better one!
r277 by najgor on Mar 24, 2010   Diff
plasma done.
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