Get mouse position

ScaledResolution scaledresolution = new ScaledResolution(this.mc.gameSettings, this.mc.displayWidth, this.mc.displayHeight);
int i = scaledresolution.getScaledWidth();
int j = scaledresolution.getScaledHeight();
int mouseX = Mouse.getX() * i / this.mc.displayWidth;
int mousey = j - Mouse.getY() * j / this.mc.displayHeight - 1;