// Drag and Drop Camera

// Fix view 0 to Max x,y view in room
view_xview[0] = clamp(view_xview[0], 0, room_width - view_wview[0]);
view_yview[0] = clamp(view_yview[0], 0, room_height - view_hview[0]);

if (flag == true) { // if pressed LMB
    if (view_xview[0] > 0) && (view_xview[0] < room_width - view_wview[0]) {
        view_xview[0] += xNow - mouse_x;
    } else if (view_xview[0] <= 0) && (xNow - mouse_x > 0) {
        view_xview[0] += xNow - mouse_x;
    } else if (view_xview[0] >= room_width - view_wview[0]) && (xNow - mouse_x < 0) {
        view_xview[0] += xNow - mouse_x;
    } else {
        xNow = mouse_x;
    }

    if (view_yview[0] > 0) && (view_yview[0] < room_height - view_hview[0]) {
        view_yview[0] += yNow - mouse_y;
    } else if (view_yview[0] <= 0) && (yNow - mouse_y > 0) {
        view_yview[0] += yNow - mouse_y;
    } else if (view_yview[0] >= room_width - view_hview[0]) && (yNow - mouse_y < 0) {
        view_yview[0] += yNow - mouse_y;
    } else {
        yNow = mouse_y;
    }
}