yinc = 1;
t = 1 / (ray[1][1] - ray[0][1]);
xinc = (ray[1][0] - ray[0][0]) * t;
zinc = (ray[1][2] - ray[0][2]) * t;
min = w.minPycor();
max = w.maxPycor();
yi = min;
xi -= xinc * ray[0][1] * scale - (min * xinc);
zi -= zinc * ray[0][1] * scale - (min * zinc);
} else {
xinc = 1;