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Sierpinski curve: Difference between revisions
Added Processing Example
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main()</lang>
=={{header|Processing}}==
{{trans|GO}}
<lang Processing>
// https://rosettacode.org/wiki/Sierpinski_curve#C.2B.2B
// translation of the GO code https://rosettacode.org/wiki/Sierpinski_curve#Go
// output on github at: https://github.com/rupertrussell/sierpinski_curve
// animated gif created using: https://ezgif.com/
int width = 770;
int height = 770;
int level = 6;
float cx = width / 2;
float cy = height;
float oldx = width/2;
float oldy = height;
float h = cx / pow(2, (level+1));
int count = 0;
void setup() {
size(770, 770);
noLoop(); // stop draw from looping repeatedly
}
void draw() {
background(0, 0, 255); // blue background
stroke(255, 255, 0); // yellow curve
squareCurve(level);
print("count = " , count);
save("Sierpinski_Curve_Level" + level + ".png");
}
void squareCurve(int level) {
sierN(level);
lineNE();
sierE(level);
lineSE();
sierS(level);
lineSW();
sierW(level);
lineNW();
lineNE(); // needed to close the square in the top left hand corner
}
void lineTo(float newX, float newY) {
if (count == 0) {
oldx = newX-width/2+h;
oldy = height-newY+2*h;
}
line(oldx, oldy, newX-width/2+h, height-newY+2*h);
// save("line-" + count + ".png"); // save each step in drawing the curve
cx = newX;
cy = newY;
oldx = newX-width/2+h;
oldy = height-newY+2*h;
count ++;
}
void lineN() {
lineTo(cx, cy-2*h);
}
void lineS() {
lineTo(cx, cy+2*h);
}
void lineE() {
lineTo(cx+2*h, cy);
}
void lineW() {
lineTo(cx-2*h, cy);
}
void lineNW() {
lineTo(cx-h, cy-h);
}
void lineNE() {
lineTo(cx+h, cy-h);
}
void lineSE() {
lineTo(cx+h, cy+h);
}
void lineSW() {
lineTo(cx-h, cy+h);
}
void sierN(int level) {
if (level == 1) {
lineNE();
lineN();
lineNW();
} else {
sierN(level - 1);
lineNE();
sierE(level - 1);
lineN();
sierW(level - 1);
lineNW();
sierN(level - 1);
}
}
void sierE(int level) {
if (level == 1) {
lineSE();
lineE();
lineNE();
} else {
sierE(level - 1);
lineSE();
sierS(level - 1);
lineE();
sierN(level - 1);
lineNE();
sierE(level - 1);
}
}
void sierS(int level) {
if (level == 1) {
lineSW();
lineS();
lineSE();
} else {
sierS(level - 1);
lineSW();
sierW(level - 1);
lineS();
sierE(level - 1);
lineSE();
sierS(level - 1);
}
}
void sierW(int level) {
if ( level == 1) {
lineNW();
lineW();
lineSW();
} else {
sierW(level - 1);
lineNW();
sierN(level - 1);
lineW();
sierS(level - 1);
lineSW();
sierW(level - 1);
}
}
</lang>
{{out}}
Offsite image at [https://github.com/rupertrussell/sierpinski_curve/blob/main/Sierpinski_Curve_Level5.png Sierpinski_Curve_Level5.png]
Offsite image at [https://github.com/rupertrussell/sierpinski_curve/blob/main/Sierpinski_Curve_Level6.png Sierpinski_Curve_Level6.png]
Offsite image at [https://github.com/rupertrussell/sierpinski_curve/blob/main/sierpinski_curve.gif level 5 animated gif]
=={{header|Quackery}}==
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