why adding 8 in the formula? $(x, y)=\left(\operatorname{con} v_{x} * 16+8, \operatorname{con} v_{y} * 16+8\right)$
why adding 8 in the formula?
$(x, y)=\left(\operatorname{con} v_{x} * 16+8, \operatorname{con} v_{y} * 16+8\right)$