Cubic Click

int x0, y0, x1, y1, x2, y2, x3, y3;

int count = 0;

void setup()

{

  size(400,400);

}

void draw()

{

}

void mousePressed()

{ 

  if (count == 0)

  {

    x0 = mouseX;

    y0 = mouseY;

    point(x0, y0);

    count++;

  }

  else if (count == 1)

  {

    x1= mouseX;

    y1 = mouseY;

    count++;

  }

  else if (count == 2)

  {

    x2 = mouseX;

    y2 = mouseY;

    count++;

  }

  else

  {

    x3 = mouseX;

    y3 = mouseY;

    CubicCurv(x0, y0, x1, y1, x2, y2, x3, y3);

    count = 0;

  }

}

void CubicCurv(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)

{

  float x, y;

  for(float t = 0 ; t <>

  {

    x= (1-t)*(1-t)*(1-t)*x0 + 3 *(1-t)*(1-t)*t*x1+ 3*(1-t)*(1-t)*t*t*x2 + t*t*t*x3;

    y= (1-t)*(1-t)*(1-t)*y0 + 3 *(1-t)*(1-t)*t*y1+ 3*(1-t)*(1-t)*t*t*y2 + t*t*t*y3;

    point(x,y);

  }

}