Fix threshold checking, used dumb values

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

readers/Reader.java

@@ -64,7 +64,9 @@ public abstract class Reader{
         int X = i%width;
         for (int x=-1;x<=1;x++) {
             for (int y=-1;y<=1;y++) {
-                if (x>=0&&y>=0&&x<=width&&y<=arr.length/width) {
+                int newX=(i+x+y*width)%width;
+                int newY=(i+x+y*width)/width;
+                if (newX>=0&&newY>=0&&newX<=width&&newY<=arr.length/width) {
                     Color col = new Color(arr[i+x+y*width]);
                     if (!col.equals(Color.MAGENTA)&&SEEKCOLOR.colorInRange(col)) {
                         farthestRight=seek(arr,i+x+y*width,SEEKCOLOR,FINALCOLOR,width,farthestRight);
@@ -83,7 +85,9 @@ public abstract class Reader{
         int X = i%width;
         for (int x=-1;x<=1;x++) {
             for (int y=-1;y<=1;y++) {
-                if (x>=0&&y>=0&&x<=width&&y<=arr.length/width) {
+                int newX=(i+x+y*width)%width;
+                int newY=(i+x+y*width)/width;
+                if (newX>=0&&newY>=0&&newX<=width&&newY<=arr.length/width) {
                     Color col = new Color(arr[i+x+y*width]);
                     if (!col.equals(Color.MAGENTA)&&colorIsBright(col, threshold)) {
                         farthestRight=seekThreshold(arr,i+x+y*width,threshold,FINALCOLOR,width,farthestRight);