pakt14

#include "cinder/app/AppBasic.h"
#include "cinder/cairo/Cairo.h"

using namespace ci;
using namespace ci::app;
using namespace std;

const int WIDTH= 640;
const int HEIGHT= 480;

class pakt14App : public AppBasic {
public:
void prepareSettings(Settings *settings);
void setup();
void draw();
int index;
float w, h;
float spread;
float spreadx, spready;
int n;
cairo::Context ctx;
};

void pakt14App::prepareSettings(Settings *settings) {
settings->setWindowSize(WIDTH, HEIGHT);
settings->setResizable(false);
}

void pakt14App::setup() {
index= 0;
w= getWindowWidth();
h= getWindowHeight();
n= 100;
ctx= cairo::Context(cairo::createWindowSurface());
ctx.setFillRule(1);
}

void pakt14App::draw() {

cairo::GradientRadial radialGrad(getWindowCenter(), 0, getWindowCenter(), getWindowWidth());
radialGrad.addColorStop(0, Color(0.5f, 0.5f, 0.6f));
radialGrad.addColorStop(1, Color(0.0f, 0.0f, 0.0f));
ctx.setSource(radialGrad);
ctx.paint();

ctx.setSourceRgba(1.0f, 1.0f, 1.0f, 0.85f);

for(int i= 0; i<=n; i++) {
spreadx= sin((i+index)*0.011f)*sin((i+index)*0.013f);
spready= sin((i+index)*0.012f)*sin((i+index)*0.014f);
spread= (spreadx*spready)*0.25f+cos((index+i)*0.001f);

float yy= sin((i+index)*0.012f+spready);
float hh= yy*(cos(index*0.013f));
float xx= cos((i+index)*0.014f+spreadx);
float ww= xx*(sin(index*0.015f));
yy= yy*(h*spread)+(h*0.5f);
xx= xx*(h*spread)+(h*0.5f);
hh= hh*(h*spread)+(h*0.5f);
ww= ww*(h*spread)+(h*0.5f);
if(i==0) {
ctx.moveTo(xx, yy);
} else if(i%5==1) {
ctx.quadTo(xx, yy, ww, hh);
} else if(i%5==2) {
ctx.quadTo(yy, xx, hh, ww);
} else if(i%5==3) {
ctx.quadTo(xx, yy, hh, ww);
} else if(i%5==4) {
ctx.quadTo(yy, xx, ww, hh);
} else {
ctx.moveTo(yy, xx);
}
}
ctx.fill();
index++;
}

CINDER_APP_BASIC(pakt14App, Renderer2d)