/
julia1.java
220 lines (162 loc) · 5.75 KB
/
julia1.java
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import processing.core.*;
public class julia1 extends PApplet {
public final int bredd = 960;
public final int höjd = 720;
double minX = -2.0;
double maxX = 2.0;
double minY = -1.5;
double maxY = 1.5;
public int maxIterations = 100;
Complex c = new Complex(-0.123, 0.745);
//////////////////////////////////////////////////////////////////////////////////////////
double breddZ = (Math.abs(maxX - minX));
double höjdZ = (Math.abs(maxY - minY));
public double pixelPerRe = (double) (bredd / breddZ);
public double pixelPerIm = (double) (höjd / höjdZ);
Complex mouse;
PFont font;
//////////////////////////////////////////////////////////////////////////////////////////
public void setup() {
size(bredd, höjd + 21 /*, P2D*/);
background(0);
stroke(255);
fill(255);
font = createFont("Courier New", 16, true);
textFont(font);
ritaUt();
}
////////////////////////////////////////////////////////////////////////////////////
public void draw() {
fill(0);
noStroke();
rect(0,höjd,bredd,höjd+21);
stroke(220);
fill(230);
mouse = toComplex(mouseX,mouseY);
text(" X: " + Math.round(mouse.getRe()*1000000)/1000000.0, 5, höjd+16);
text( "Y: " + Math.round(mouse.getIm()*1000000)/1000000.0 + "i", bredd/2, höjd+16);
}
///////////////////////////////////////////////////////////////////////////
public void ritaUt() {
Complex z, hej;
boolean isInside;
int antalN = 0;
background(0);
for(int i = 0; i < width*height; i++) {
isInside = true;
z = toComplex( indexToPixel(i)[0], indexToPixel(i)[1]);
for(int a = 0; a <= maxIterations; a++) {
if ((z.getRe()*z.getRe() + z.getIm()*z.getIm() ) > 4.0) {
isInside = false;
antalN = a;
break;
}
hej = z.mul(z);
z = hej.add(c);
}
if (isInside) {
stroke(0);
point(indexToPixel(i)[0], indexToPixel(i)[1]);
} else {
//the smmoth fade from black to red to yellow to white to yellow to black.
if (antalN <= 12) {
stroke(antalN*21,0,0);
} else if (antalN <= 24) {
stroke(252, (antalN-12)*21,0);
} else if (antalN >= 76) {
stroke(255-(antalN-76)*7,140-(antalN-76)*8,0);
} else if (antalN >= 40) {
stroke(252, 252-(antalN-40)*4,140-(antalN-40)*9);
} else {
stroke(255/*-((antalN-24)/6)*/,252,(antalN-24)*9);
}
point(indexToPixel(i)[0], indexToPixel(i)[1]);
}
}
}
///////////////////////////////////////////////////////////////////////////
public void mouseReleased() {
mouse = toComplex(mouseX, mouseY);
if(mouseButton == LEFT) {
background(0);
minX = (mouse.getRe() - 0.25 * breddZ);
maxX = (mouse.getRe() + 0.25 * breddZ);
minY = (mouse.getIm() - 0.25 * höjdZ);
maxY = (mouse.getIm() + 0.25 * höjdZ);
//-------
breddZ = (Math.abs(maxX - minX));
höjdZ = (Math.abs(maxY - minY));
pixelPerRe = (double) (bredd / breddZ);
pixelPerIm = (double) (höjd / höjdZ);
ritaUt();
} else if(mouseButton == RIGHT) {
background(0);
minX = (mouse.getRe() - 1.5 * breddZ);
maxX = (mouse.getRe() + 1.5 * breddZ);
minY = (mouse.getIm() - 1.5 * höjdZ);
maxY = (mouse.getIm() + 1.5 * höjdZ);
//-------
breddZ = (Math.abs(maxX - minX));
höjdZ = (Math.abs(maxY - minY));
pixelPerRe = (double) (bredd / breddZ);
pixelPerIm = (double) (höjd / höjdZ);
ritaUt();
}
}
public void keyPressed() {
if( key == ENTER ){
background(0);
minX = -2.0;
maxX = 1.0;
minY = -1.2;
maxY = 1.2;
//-------
breddZ = (Math.abs(maxX - minX));
höjdZ = (Math.abs(maxY - minY));
pixelPerRe = (double) (bredd / breddZ);
pixelPerIm = (double) (höjd / höjdZ);
ritaUt();
} else if(key == 's') {
saveFrame("mandelbrot-####.jpg");
} else if(key == 'q') {
c = new Complex(-0.123, 0.745);
ritaUt();
} else if(key == 'w') {
c = new Complex(-0.391, 0.587);
ritaUt();
} else if(key == 'e') {
c = new Complex(0, 1);
ritaUt();
} else if(key == 'r') {
c = new Complex(-0.75, 0);
ritaUt();
} else if(key == '5') {
c = new Complex(-0.75, 0);
} else if(key == '6') {
c = new Complex(-0.75, 0);
} else if(key == '7') {
c = new Complex(-0.75, 0);
} else if(key == '8') {
c = new Complex(-0.75, 0);
} else if(key == '9') {
c = new Complex(-0.75, 0);
}
}
///////////////////////////////////////////////////////////////////////////
public int[] indexToPixel(int i) {
int[] pixel = { i%bredd, (i/bredd) };
return pixel;
}
public Complex toComplex(int x, int y) {
return new Complex( minX + x*(maxX-minX)/(bredd), maxY - y*(maxY-minY)/(höjd) );
}
public int[] toCoordinate(Complex punkt) {
int[] koordinater = {(int) (punkt.getRe()* pixelPerRe + (bredd/2)),(int) ((höjd/2) + (-1 * punkt.getIm() * pixelPerIm)) };
return koordinater;
}
//////////////////////////////////////////////////////////////////////////////
//Krävs för att använda processings lib.
public static void main(String args[]) {
PApplet.main(new String[] {"--present", "julia1" });
}
}