Program not checking last column of array.

janvos2506

I just got this little 8x8 LED matrix for my arduino and i wanted to make a program on the computer in wich i can draw and then export it to my arduino. Now i am writing this program, I got all the little circles drawn and stored in an array but I want when my mouse is hovering over them to light up. This works great but it just does not interact with the last collumn of the board. And I can't seem to solve it, another thing is i can't get it to work to check for the y values, now it only checks for the x values.

int pixelCount = 64;
int xpos = 0;
int ypos = 0;
float [] pixelSize = new float[pixelCount];
float [] xPos = new float[pixelCount];
float [] yPos = new float[pixelCount];

void setup() {
  size(400, 400);  // size always goes first!
  if (frame != null) {
    frame.setResizable(true);
  }

  for (int i=0; i<pixelCount; i++) {
   pixelSize[i] = 50;
   xPos[i] = xpos+25;
   xpos += 50;
   yPos[i] = ypos+25;
   if(xpos == 400) {
    xpos = 0;
   ypos += 50;
   }

  }
}

void draw() {
 background(255);
for(int i=0; i<pixelCount; i++){
smooth();
fill(255,255,255,255);
//noStroke();
ellipse(xPos[i],yPos[i],50,50);
}
for(int z = 0; z < 63; z++) {
  if(mouseX > xPos[z]-25 && mouseX < xPos[z+1]-25) {
   // if (80 > yPos[z] && 80 < yPos[z+1]){
    fill(255,0,0,255);
    ellipse(xPos[z],yPos[z],50,50);
    print(mouseX);
  //} 

}

}
}

koogs

for(int z = 0; z < 63; z++) {

do you mean < 63?

janvos2506

well, if i do <64 i get an overflow EDIT: got it, adding 1 to the array when it was on its limit was the problem.