+ else if (IS_ACID_POOL(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+
+ if (IS_ACID_POOL(old_element))
+ {
+ new_element = old_element;
+ }
+
+ if (last_x == x - 1 && last_y == y && IN_LEV_FIELD(last_x, last_y) &&
+ IS_ACID_POOL(IntelliDrawBuffer[last_x][last_y]))
+ {
+ if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPLEFT)
+ {
+ new_element = EL_ACID_POOL_TOPRIGHT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPRIGHT)
+ {
+ last_element_new = EL_ACID;
+ new_element = EL_ACID_POOL_TOPRIGHT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMLEFT)
+ {
+ new_element = EL_ACID_POOL_BOTTOMRIGHT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMRIGHT)
+ {
+ last_element_new = EL_ACID_POOL_BOTTOM;
+ new_element = EL_ACID_POOL_BOTTOMRIGHT;
+ }
+ }
+ else if (last_x == x + 1 && last_y == y && IN_LEV_FIELD(last_x, last_y) &&
+ IS_ACID_POOL(IntelliDrawBuffer[last_x][last_y]))
+ {
+ if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPLEFT)
+ {
+ last_element_new = EL_ACID;
+ new_element = EL_ACID_POOL_TOPLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPRIGHT)
+ {
+ new_element = EL_ACID_POOL_TOPLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMLEFT)
+ {
+ last_element_new = EL_ACID_POOL_BOTTOM;
+ new_element = EL_ACID_POOL_BOTTOMLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMRIGHT)
+ {
+ new_element = EL_ACID_POOL_BOTTOMLEFT;
+ }
+ }
+ else if (last_x == x && last_y == y - 1 && IN_LEV_FIELD(last_x, last_y) &&
+ IS_ACID_POOL(IntelliDrawBuffer[last_x][last_y]))
+ {
+ if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPLEFT)
+ {
+ new_element = EL_ACID_POOL_BOTTOMLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPRIGHT)
+ {
+ new_element = EL_ACID_POOL_BOTTOMRIGHT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMLEFT)
+ {
+ last_element_new = EL_ACID_POOL_TOPLEFT;
+ new_element = EL_ACID_POOL_BOTTOMLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMRIGHT)
+ {
+ last_element_new = EL_ACID_POOL_TOPRIGHT;
+ new_element = EL_ACID_POOL_BOTTOMRIGHT;
+ }
+ else
+ {
+ last_element_new = EL_ACID;
+ new_element = EL_ACID_POOL_BOTTOM;
+ }
+ }
+ else if (last_x == x && last_y == y + 1 && IN_LEV_FIELD(last_x, last_y) &&
+ IS_ACID_POOL(IntelliDrawBuffer[last_x][last_y]))
+ {
+ if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPLEFT)
+ {
+ new_element = EL_ACID_POOL_TOPLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_TOPRIGHT)
+ {
+ new_element = EL_ACID_POOL_TOPRIGHT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMLEFT)
+ {
+ new_element = EL_ACID_POOL_TOPLEFT;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == EL_ACID_POOL_BOTTOMRIGHT)
+ {
+ new_element = EL_ACID_POOL_TOPRIGHT;
+ }
+ else
+ {
+ last_element_new = EL_ACID;
+ new_element = EL_ACID;
+ }
+ }
+
+ if (last_element_new != EL_UNDEFINED)
+ SetElementSimple(last_x, last_y, last_element_new, change_level);
+ }
+ else if (IS_BELT(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+ int belt_nr = getBeltNrFromBeltElement(new_element);
+ int belt_left = getBeltElementFromBeltNrAndBeltDir(belt_nr, MV_LEFT);
+ int belt_none = getBeltElementFromBeltNrAndBeltDir(belt_nr, MV_NONE);
+ int belt_right = getBeltElementFromBeltNrAndBeltDir(belt_nr, MV_RIGHT);
+ boolean last_element_is_neighbour = FALSE;
+
+ if (IS_BELT(old_element))
+ {
+ new_element = old_element;
+ }
+
+ if (last_x == x - 1 && last_y == y && IN_LEV_FIELD(last_x, last_y) &&
+ IS_BELT(IntelliDrawBuffer[last_x][last_y]))
+ {
+ last_element_new = IntelliDrawBuffer[last_x][last_y];
+
+ if (IntelliDrawBuffer[last_x][last_y] == belt_left)
+ {
+ new_element = belt_right;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == belt_right)
+ {
+ last_element_new = belt_none;
+ new_element = belt_right;
+ }
+
+ last_element_is_neighbour = TRUE;
+ }
+ else if (last_x == x + 1 && last_y == y && IN_LEV_FIELD(last_x, last_y) &&
+ IS_BELT(IntelliDrawBuffer[last_x][last_y]))
+ {
+ last_element_new = IntelliDrawBuffer[last_x][last_y];
+
+ if (IntelliDrawBuffer[last_x][last_y] == belt_left)
+ {
+ last_element_new = belt_none;
+ new_element = belt_left;
+ }
+ else if (IntelliDrawBuffer[last_x][last_y] == belt_right)
+ {
+ new_element = belt_left;
+ }
+
+ last_element_is_neighbour = TRUE;
+ }
+
+ if (last_element_new != EL_UNDEFINED)
+ SetElementSimple(last_x, last_y, last_element_new, change_level);
+
+ /* reduce connections of neighbour belt elements to minimal connections */
+ if (last_element_is_neighbour)
+ {
+ /* set neighbour belt elements to newly determined belt connections */
+ SetElementSimple(x, y, new_element, change_level);
+ SetElementSimple(last_x, last_y, last_element_new, change_level);
+
+ /* remove all open belt connections of neighbour belt elements */
+ new_element = getClosedBelt(x, y);
+ last_element_new = getClosedBelt(last_x, last_y);
+
+ /* set neighbour belt elements to new, minimized belt connections */
+ SetElementSimple(x, y, new_element, change_level);
+ SetElementSimple(last_x, last_y, last_element_new, change_level);
+ }
+ }
+ else if (new_element == EL_EMC_WALL_1 ||
+ new_element == EL_EMC_WALL_2 ||
+ new_element == EL_EMC_WALL_3)
+ {
+ int last_element_new = EL_UNDEFINED;
+
+ if (last_x == x && last_y == y - 1 && IN_LEV_FIELD(last_x, last_y) &&
+ (IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_1 ||
+ IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_2 ||
+ IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_3))
+ {
+ if (IN_LEV_FIELD(last_x, last_y - 1))
+ {
+ if (IntelliDrawBuffer[last_x][last_y - 1] != EL_EMC_WALL_1 &&
+ IntelliDrawBuffer[last_x][last_y - 1] != EL_EMC_WALL_2)
+ last_element_new = EL_EMC_WALL_1;
+ else if (IntelliDrawBuffer[last_x][last_y - 1] == EL_EMC_WALL_1 ||
+ IntelliDrawBuffer[last_x][last_y - 1] == EL_EMC_WALL_2)
+ last_element_new = EL_EMC_WALL_2;
+ }
+
+ new_element = EL_EMC_WALL_3;
+ }
+ else if (last_x == x && last_y == y + 1 && IN_LEV_FIELD(last_x, last_y) &&
+ (IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_1 ||
+ IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_2 ||
+ IntelliDrawBuffer[last_x][last_y] == EL_EMC_WALL_3))
+ {
+ if (IN_LEV_FIELD(last_x, last_y + 1))
+ {
+ if (IntelliDrawBuffer[last_x][last_y + 1] != EL_EMC_WALL_2 &&
+ IntelliDrawBuffer[last_x][last_y + 1] != EL_EMC_WALL_3)
+ last_element_new = EL_EMC_WALL_3;
+ else if (IntelliDrawBuffer[last_x][last_y + 1] == EL_EMC_WALL_2 ||
+ IntelliDrawBuffer[last_x][last_y + 1] == EL_EMC_WALL_3)
+ last_element_new = EL_EMC_WALL_2;
+ }
+
+ new_element = EL_EMC_WALL_1;
+ }
+
+ if (last_element_new != EL_UNDEFINED)
+ SetElementSimple(last_x, last_y, last_element_new, change_level);
+ }