+ MapDrawingArea(ED_DRAWING_ID_CUSTOM_CHANGE_ACTION);
+
+ DrawCustomChangeContentArea();
+ }
+
+ redraw_mask |= REDRAW_FIELD;
+}
+
+static void DrawPropertiesChange()
+{
+ int i;
+
+ /* needed to initially set selectbox options for special action options */
+ setSelectboxSpecialActionOptions();
+
+ /* draw stickybutton gadget */
+ MapCheckbuttonGadget(ED_CHECKBUTTON_ID_STICK_ELEMENT);
+
+ /* draw checkbutton gadgets */
+ for (i = ED_CHECKBUTTON_ID_CHANGE_FIRST;
+ i <= ED_CHECKBUTTON_ID_CHANGE_LAST; i++)
+ MapCheckbuttonGadget(i);
+
+ /* draw counter gadgets */
+ for (i = ED_COUNTER_ID_CHANGE_FIRST;
+ i <= ED_COUNTER_ID_CHANGE_LAST; i++)
+ MapCounterButtons(i);
+
+ /* draw selectbox gadgets */
+ for (i = ED_SELECTBOX_ID_CHANGE_FIRST;
+ i <= ED_SELECTBOX_ID_CHANGE_LAST; i++)
+ MapSelectboxGadget(i);
+
+ /* draw textbutton gadgets */
+ for (i = ED_TEXTBUTTON_ID_CHANGE_FIRST;
+ i <= ED_TEXTBUTTON_ID_CHANGE_LAST; i++)
+ MapTextbuttonGadget(i);
+
+ /* draw graphicbutton gadgets */
+ for (i = ED_GRAPHICBUTTON_ID_CHANGE_FIRST;
+ i <= ED_GRAPHICBUTTON_ID_CHANGE_LAST; i++)
+ MapGraphicbuttonGadget(i);
+
+ /* draw drawing area gadgets */
+ DrawPropertiesChangeDrawingAreas();
+}
+
+static void DrawEditorElementAnimation(int x, int y)
+{
+ int graphic = el2img(properties_element);
+ int frame = (ANIM_MODE(graphic) == ANIM_CE_VALUE ?
+ custom_element.ce_value_fixed_initial :
+ ANIM_MODE(graphic) == ANIM_CE_SCORE ?
+ custom_element.collect_score_initial : FrameCounter);
+
+ DrawFixedGraphicAnimationExt(drawto, x, y, graphic, frame, NO_MASKING);
+}
+
+static void DrawEditorElementName(int x, int y, int element)
+{
+ char *element_name = getElementInfoText(element);
+ int font_nr = FONT_TEXT_1;
+ int font_width = getFontWidth(font_nr);
+ int font_height = getFontHeight(font_nr);
+ int max_text_width = SXSIZE - x - ED_ELEMENT_SETTINGS_XPOS(0);
+ int max_chars_per_line = max_text_width / font_width;
+ char buffer[max_chars_per_line + 1];
+
+ if (strlen(element_name) <= max_chars_per_line)
+ DrawTextS(x, y, font_nr, element_name);
+ else
+ {
+ int next_pos = max_chars_per_line;
+
+ strncpy(buffer, element_name, max_chars_per_line);
+ buffer[max_chars_per_line] = '\0';
+
+ if (element_name[max_chars_per_line] == ' ')
+ next_pos++;
+ else
+ {
+ int i;
+
+ for (i = max_chars_per_line - 1; i >= 0; i--)
+ if (buffer[i] == ' ')
+ break;
+
+ if (strlen(&element_name[i + 1]) <= max_chars_per_line)
+ {
+ buffer[i] = '\0';
+ next_pos = i + 1;
+ }
+ }
+
+ DrawTextS(x, y - font_height / 2, font_nr, buffer);
+
+ strncpy(buffer, &element_name[next_pos], max_chars_per_line);
+ buffer[max_chars_per_line] = '\0';
+
+ DrawTextS(x, y + font_height / 2, font_nr, buffer);
+ }
+}
+
+static void DrawPropertiesWindow()
+{
+ int xstart = 2;
+ int ystart = 4;
+
+ stick_element_properties_window = FALSE;
+
+ /* make sure that previous properties edit mode exists for this element */
+ if (edit_mode_properties > ED_MODE_PROPERTIES_CONFIG_2 &&
+ !IS_CUSTOM_ELEMENT(properties_element))
+ edit_mode_properties = ED_MODE_PROPERTIES_CONFIG_2;
+
+ if (edit_mode_properties > ED_MODE_PROPERTIES_CONFIG &&
+ !ELEM_IS_PLAYER(properties_element) &&
+ !IS_CUSTOM_ELEMENT(properties_element))
+ edit_mode_properties = ED_MODE_PROPERTIES_CONFIG;
+
+ if (edit_mode_properties == ED_MODE_PROPERTIES_CONFIG &&
+ (ELEM_IS_PLAYER(properties_element) ||
+ IS_CUSTOM_ELEMENT(properties_element)))
+ edit_mode_properties = ED_MODE_PROPERTIES_CONFIG_1;
+
+ CopyElementPropertiesToEditor(properties_element);
+
+ UnmapLevelEditorFieldGadgets();
+ UnmapLevelEditorToolboxDrawingGadgets();
+ UnmapLevelEditorToolboxCustomGadgets();
+
+ if (IS_CUSTOM_ELEMENT(properties_element) ||
+ IS_GROUP_ELEMENT(properties_element))
+ MapLevelEditorToolboxCustomGadgets();
+
+ SetMainBackgroundImage(IMG_BACKGROUND_EDITOR);
+ ClearField();
+
+#if 1
+ DrawTextSCentered(ED_SETTINGS1_YPOS, FONT_TITLE_1, "Element Settings");
+#else
+ DrawText(SX + ED_SETTINGS2_XPOS, SY + ED_SETTINGS1_YPOS,
+ "Element Settings", FONT_TITLE_1);
+#endif
+
+ FrameCounter = 0; /* restart animation frame counter */
+
+ DrawElementBorder(SX + xstart * MINI_TILEX,
+ SY + ystart * MINI_TILEY + MINI_TILEY / 2,
+ TILEX, TILEY, FALSE);
+
+ DrawEditorElementAnimation(SX + xstart * MINI_TILEX,
+ SY + ystart * MINI_TILEY + MINI_TILEY / 2);
+
+ DrawEditorElementName((xstart + 3) * MINI_TILEX + 1,
+ (ystart + 1) * MINI_TILEY + 1,
+ properties_element);
+
+ DrawPropertiesTabulatorGadgets();
+
+ if (edit_mode_properties == ED_MODE_PROPERTIES_INFO)
+ DrawPropertiesInfo();
+ else if (edit_mode_properties == ED_MODE_PROPERTIES_CHANGE)
+ DrawPropertiesChange();
+ else /* (edit_mode_properties == ED_MODE_PROPERTIES_CONFIG[_1|_2]) */
+ DrawPropertiesConfig();
+}
+
+static void UpdateCustomElementGraphicGadgets()
+{
+ struct ElementInfo *ei = &element_info[properties_element];
+ int i;
+
+ ei->gfx_element = (ei->use_gfx_element ? ei->gfx_element_initial :
+ properties_element);
+
+ ModifyEditorElementList();
+ RedrawDrawingElements();
+
+ /* force redraw of all mapped drawing area gadgets */
+ for (i = 0; i < ED_NUM_DRAWING_AREAS; i++)
+ {
+ struct GadgetInfo *gi = level_editor_gadget[drawingarea_info[i].gadget_id];
+
+ if (gi->mapped)
+ MapDrawingArea(i);
+ }
+}
+
+static int getOpenDirectionFromTube(int element)
+{
+ switch (element)
+ {
+ case EL_TUBE_LEFT_UP: return (MV_LEFT | MV_UP);
+ case EL_TUBE_LEFT_DOWN: return (MV_LEFT | MV_DOWN);
+ case EL_TUBE_RIGHT_UP: return (MV_RIGHT | MV_UP);
+ case EL_TUBE_RIGHT_DOWN: return (MV_RIGHT | MV_DOWN);
+ case EL_TUBE_HORIZONTAL: return (MV_HORIZONTAL);
+ case EL_TUBE_HORIZONTAL_UP: return (MV_HORIZONTAL | MV_UP);
+ case EL_TUBE_HORIZONTAL_DOWN: return (MV_HORIZONTAL | MV_DOWN);
+ case EL_TUBE_VERTICAL: return (MV_VERTICAL);
+ case EL_TUBE_VERTICAL_LEFT: return (MV_VERTICAL | MV_LEFT);
+ case EL_TUBE_VERTICAL_RIGHT: return (MV_VERTICAL | MV_RIGHT);
+ case EL_TUBE_ANY: return (MV_ANY_DIRECTION);
+ }
+
+ return MV_NONE;
+}
+
+static int getTubeFromOpenDirection(int direction)
+{
+ switch (direction)
+ {
+ case (MV_LEFT | MV_UP): return EL_TUBE_LEFT_UP;
+ case (MV_LEFT | MV_DOWN): return EL_TUBE_LEFT_DOWN;
+ case (MV_RIGHT | MV_UP): return EL_TUBE_RIGHT_UP;
+ case (MV_RIGHT | MV_DOWN): return EL_TUBE_RIGHT_DOWN;
+ case (MV_HORIZONTAL): return EL_TUBE_HORIZONTAL;
+ case (MV_HORIZONTAL | MV_UP): return EL_TUBE_HORIZONTAL_UP;
+ case (MV_HORIZONTAL | MV_DOWN): return EL_TUBE_HORIZONTAL_DOWN;
+ case (MV_VERTICAL): return EL_TUBE_VERTICAL;
+ case (MV_VERTICAL | MV_LEFT): return EL_TUBE_VERTICAL_LEFT;
+ case (MV_VERTICAL | MV_RIGHT): return EL_TUBE_VERTICAL_RIGHT;
+ case (MV_ANY_DIRECTION): return EL_TUBE_ANY;
+
+ /* if only one direction, fall back to simple tube with that direction */
+ case (MV_LEFT): return EL_TUBE_HORIZONTAL;
+ case (MV_RIGHT): return EL_TUBE_HORIZONTAL;
+ case (MV_UP): return EL_TUBE_VERTICAL;
+ case (MV_DOWN): return EL_TUBE_VERTICAL;
+ }
+
+ return EL_EMPTY;
+}
+
+static int getTubeFromOpenDirectionNotEmpty(int direction, int element_old)
+{
+ int element_new = getTubeFromOpenDirection(direction);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getOpenDirectionFromBelt(int element)
+{
+ int belt_dir = getBeltDirFromBeltElement(element);
+
+ return (belt_dir == MV_LEFT ? MV_RIGHT :
+ belt_dir == MV_RIGHT ? MV_LEFT :
+ belt_dir == MV_NONE ? MV_HORIZONTAL : belt_dir);
+}
+
+static int getBeltFromNrAndOpenDirection(int nr, int direction)
+{
+ int belt_dir = (direction == MV_LEFT ? MV_RIGHT :
+ direction == MV_RIGHT ? MV_LEFT :
+ direction == MV_HORIZONTAL ? MV_NONE : direction);
+
+ if (direction == MV_NONE)
+ return EL_EMPTY;
+
+ return getBeltElementFromBeltNrAndBeltDir(nr, belt_dir);
+}
+
+static int getBeltFromNrAndOpenDirectionNotEmpty(int nr, int direction,
+ int element_old)
+{
+ int element_new = getBeltFromNrAndOpenDirection(nr, direction);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getOpenDirectionFromPool(int element)
+{
+ switch (element)
+ {
+ case EL_ACID_POOL_TOPLEFT: return (MV_DOWN | MV_RIGHT);
+ case EL_ACID_POOL_TOPRIGHT: return (MV_DOWN | MV_LEFT);
+ case EL_ACID_POOL_BOTTOMLEFT: return (MV_UP | MV_RIGHT);
+ case EL_ACID_POOL_BOTTOMRIGHT: return (MV_UP | MV_LEFT);
+ case EL_ACID_POOL_BOTTOM: return (MV_HORIZONTAL | MV_UP);
+ case EL_ACID: return (MV_HORIZONTAL | MV_DOWN);
+ }
+
+ return MV_NONE;
+}
+
+static int getPoolFromOpenDirection(int direction)
+{
+ switch (direction)
+ {
+ case (MV_DOWN | MV_RIGHT): return EL_ACID_POOL_TOPLEFT;
+ case (MV_DOWN | MV_LEFT): return EL_ACID_POOL_TOPRIGHT;
+ case (MV_UP | MV_RIGHT): return EL_ACID_POOL_BOTTOMLEFT;
+ case (MV_UP | MV_LEFT): return EL_ACID_POOL_BOTTOMRIGHT;
+ case (MV_HORIZONTAL | MV_UP): return EL_ACID_POOL_BOTTOM;
+ case (MV_HORIZONTAL | MV_DOWN): return EL_ACID;
+ }
+
+ return EL_EMPTY;
+}
+
+static int getPoolFromOpenDirectionExt(int direction, int help_element)
+{
+ int element = getPoolFromOpenDirection(direction);
+ int help_direction = getOpenDirectionFromPool(help_element);
+
+ if (element == EL_EMPTY)
+ {
+ int help_direction_vertical = help_direction & MV_VERTICAL;
+
+ element = getPoolFromOpenDirection(direction | help_direction_vertical);
+ }
+
+ if (element == EL_EMPTY)
+ {
+ int help_direction_horizontal = help_direction & MV_HORIZONTAL;
+
+ element = getPoolFromOpenDirection(direction | help_direction_horizontal);
+ }
+
+ return element;
+}
+
+static int getPoolFromOpenDirectionNotEmpty(int direction, int element_old)
+{
+ int element_new = getPoolFromOpenDirectionExt(direction, element_old);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getOpenDirectionFromPillar(int element)
+{
+ switch (element)
+ {
+ case EL_EMC_WALL_1: return (MV_DOWN);
+ case EL_EMC_WALL_2: return (MV_VERTICAL);
+ case EL_EMC_WALL_3: return (MV_UP);
+ }
+
+ return MV_NONE;
+}
+
+static int getPillarFromOpenDirection(int direction)
+{
+ switch (direction)
+ {
+ case (MV_DOWN): return EL_EMC_WALL_1;
+ case (MV_VERTICAL): return EL_EMC_WALL_2;
+ case (MV_UP): return EL_EMC_WALL_3;
+ }
+
+ return EL_EMPTY;
+}
+
+static int getPillarFromOpenDirectionNotEmpty(int direction, int element_old)
+{
+ int element_new = getPillarFromOpenDirection(direction);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getOpenDirectionFromSteel2(int element)
+{
+ switch (element)
+ {
+ case EL_DC_STEELWALL_2_LEFT: return (MV_RIGHT);
+ case EL_DC_STEELWALL_2_RIGHT: return (MV_LEFT);
+ case EL_DC_STEELWALL_2_TOP: return (MV_DOWN);
+ case EL_DC_STEELWALL_2_BOTTOM: return (MV_UP);
+ case EL_DC_STEELWALL_2_HORIZONTAL: return (MV_HORIZONTAL);
+ case EL_DC_STEELWALL_2_VERTICAL: return (MV_VERTICAL);
+ case EL_DC_STEELWALL_2_MIDDLE: return (MV_ANY_DIRECTION);
+ case EL_DC_STEELWALL_2_SINGLE: return (MV_NONE);
+ }
+
+ return MV_NONE;
+}
+
+static int getSteel2FromOpenDirection(int direction)
+{
+ switch (direction)
+ {
+ case (MV_RIGHT): return EL_DC_STEELWALL_2_LEFT;
+ case (MV_LEFT): return EL_DC_STEELWALL_2_RIGHT;
+ case (MV_DOWN): return EL_DC_STEELWALL_2_TOP;
+ case (MV_UP): return EL_DC_STEELWALL_2_BOTTOM;
+ case (MV_HORIZONTAL): return EL_DC_STEELWALL_2_HORIZONTAL;
+ case (MV_VERTICAL): return EL_DC_STEELWALL_2_VERTICAL;
+ case (MV_ANY_DIRECTION): return EL_DC_STEELWALL_2_MIDDLE;
+ case (MV_NONE): return EL_DC_STEELWALL_2_SINGLE;
+ }
+
+ return EL_EMPTY;
+}
+
+static int getSteel2FromOpenDirectionNotEmpty(int direction, int element_old)
+{
+ int element_new = getSteel2FromOpenDirection(direction);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getOpenDirectionFromChip(int element)
+{
+ switch (element)
+ {
+ case EL_SP_CHIP_SINGLE: return (MV_NONE);
+ case EL_SP_CHIP_LEFT: return (MV_RIGHT);
+ case EL_SP_CHIP_RIGHT: return (MV_LEFT);
+ case EL_SP_CHIP_TOP: return (MV_DOWN);
+ case EL_SP_CHIP_BOTTOM: return (MV_UP);
+ }
+
+ return MV_NONE;
+}
+
+static int getChipFromOpenDirection(int direction)
+{
+ switch (direction)
+ {
+ case (MV_NONE): return EL_SP_CHIP_SINGLE;
+ case (MV_LEFT): return EL_SP_CHIP_RIGHT;
+ case (MV_RIGHT): return EL_SP_CHIP_LEFT;
+ case (MV_UP): return EL_SP_CHIP_BOTTOM;
+ case (MV_DOWN): return EL_SP_CHIP_TOP;
+ }
+
+ return EL_EMPTY;
+}
+
+static int getChipFromOpenDirectionNotEmpty(int direction, int element_old)
+{
+ int element_new = getChipFromOpenDirection(direction);
+
+ return (element_new != EL_EMPTY ? element_new : element_old);
+}
+
+static int getClosedTube(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int direction_old = getOpenDirectionFromTube(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) && IS_TUBE(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromTube(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getTubeFromOpenDirectionNotEmpty(direction_new, element_old);
+}
+
+static int getClosedBelt(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int nr = getBeltNrFromBeltElement(element_old);
+ int direction_old = getOpenDirectionFromBelt(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = MV_BIT_LEFT; i <= MV_BIT_RIGHT; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) && IS_BELT(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromBelt(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getBeltFromNrAndOpenDirection(nr, direction_new);
+}
+
+static int getClosedPool(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int direction_old = getOpenDirectionFromPool(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) &&
+ IS_ACID_POOL_OR_ACID(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromPool(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getPoolFromOpenDirectionNotEmpty(direction_new, element_old);
+}
+
+static int getClosedPillar(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int direction_old = getOpenDirectionFromPillar(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = MV_BIT_UP; i <= MV_BIT_DOWN; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) && IS_EMC_PILLAR(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromPillar(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getPillarFromOpenDirectionNotEmpty(direction_new, element_old);
+}
+
+static int getClosedSteel2(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int direction_old = getOpenDirectionFromSteel2(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) && IS_DC_STEELWALL_2(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromSteel2(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getSteel2FromOpenDirectionNotEmpty(direction_new, element_old);
+}
+
+static int getClosedChip(int x, int y)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ int element_old = IntelliDrawBuffer[x][y];
+ int direction_old = getOpenDirectionFromChip(element_old);
+ int direction_new = MV_NONE;
+ int i;
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+
+ if (IN_LEV_FIELD(xx, yy) && IS_SP_CHIP(IntelliDrawBuffer[xx][yy]) &&
+ (direction_old & dir) &&
+ (getOpenDirectionFromChip(IntelliDrawBuffer[xx][yy]) & dir_opposite))
+ direction_new |= dir;
+ }
+
+ return getChipFromOpenDirectionNotEmpty(direction_new, element_old);
+}
+
+static void SetElementSimple(int x, int y, int element, boolean change_level)
+{
+ int sx = x - level_xpos;
+ int sy = y - level_ypos;
+
+ IntelliDrawBuffer[x][y] = element;
+
+ if (change_level)
+ Feld[x][y] = element;
+
+ if (IN_ED_FIELD(sx, sy))
+ DrawMiniElement(sx, sy, element);
+}
+
+static void MergeAndCloseNeighbourElements(int x1, int y1, int *element1,
+ int x2, int y2, int *element2,
+ int (*close_function)(int, int),
+ boolean change_level)
+{
+ /* set neighbour elements to newly determined connections */
+ SetElementSimple(x1, y1, *element1, change_level);
+ SetElementSimple(x2, y2, *element2, change_level);
+
+ /* remove all open connections of neighbour elements */
+ *element1 = close_function(x1, y1);
+ *element2 = close_function(x2, y2);
+
+ /* set neighbour elements to new, minimized connections */
+ SetElementSimple(x1, y1, *element1, change_level);
+ SetElementSimple(x2, y2, *element2, change_level);
+}
+
+static void SetElementIntelliDraw(int x, int y, int new_element,
+ boolean change_level, int button)
+{
+ static int xy[4][2] =
+ {
+ { -1, 0 },
+ { +1, 0 },
+ { 0, -1 },
+ { 0, +1 }
+ };
+ static int last_x = -1;
+ static int last_y = -1;
+ int old_element = IntelliDrawBuffer[x][y];
+
+ if (new_element == EL_UNDEFINED)
+ {
+ last_x = -1;
+ last_y = -1;
+
+ return;
+ }
+
+ if (IS_TUBE(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+ int direction = MV_NONE;
+ int i;
+
+ /* if old element is of same kind, keep all existing directions */
+ if (IS_TUBE(old_element))
+ direction |= getOpenDirectionFromTube(old_element);
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+
+ if (last_x == xx && last_y == yy && IN_LEV_FIELD(last_x, last_y) &&
+ IS_TUBE(IntelliDrawBuffer[last_x][last_y]))
+ {
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+ int last_element_old = IntelliDrawBuffer[last_x][last_y];
+ int last_direction_old = getOpenDirectionFromTube(last_element_old);
+ int last_direction_new = last_direction_old | dir_opposite;
+
+ last_element_new = getTubeFromOpenDirection(last_direction_new);
+
+ direction |= dir;
+ }
+ }
+
+ new_element = getTubeFromOpenDirectionNotEmpty(direction, new_element);
+
+ if (last_element_new != EL_UNDEFINED)
+ MergeAndCloseNeighbourElements(x, y, &new_element,
+ last_x, last_y, &last_element_new,
+ getClosedTube, change_level);
+ }
+ else if (IS_BELT(new_element))
+ {
+ int belt_nr = getBeltNrFromBeltElement(new_element);
+ int last_element_new = EL_UNDEFINED;
+ int direction = MV_NONE;
+ int i;
+
+ /* if old element is of same kind, keep all existing directions */
+ if (IS_BELT(old_element))
+ direction |= getOpenDirectionFromBelt(old_element);
+
+ for (i = MV_BIT_LEFT; i <= MV_BIT_RIGHT; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+
+ if (last_x == xx && last_y == yy && IN_LEV_FIELD(last_x, last_y) &&
+ IS_BELT(IntelliDrawBuffer[last_x][last_y]))
+ {
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+ int last_element_old = IntelliDrawBuffer[last_x][last_y];
+ int last_belt_nr = getBeltNrFromBeltElement(last_element_old);
+ int last_direction_old = getOpenDirectionFromBelt(last_element_old);
+ int last_direction_new = last_direction_old | dir_opposite;
+
+ last_element_new = getBeltFromNrAndOpenDirection(last_belt_nr,
+ last_direction_new);
+ direction |= dir;
+ }
+ }
+
+ new_element = getBeltFromNrAndOpenDirectionNotEmpty(belt_nr, direction,
+ new_element);
+ if (last_element_new != EL_UNDEFINED)
+ MergeAndCloseNeighbourElements(x, y, &new_element,
+ last_x, last_y, &last_element_new,
+ getClosedBelt, change_level);
+ }
+ else if (IS_ACID_POOL_OR_ACID(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+ int direction = MV_NONE;
+ int i;
+
+ /* if old element is of same kind, keep all existing directions */
+ if (IS_ACID_POOL_OR_ACID(old_element))
+ direction |= getOpenDirectionFromPool(old_element);
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+
+ if (last_x == xx && last_y == yy && IN_LEV_FIELD(last_x, last_y) &&
+ IS_ACID_POOL_OR_ACID(IntelliDrawBuffer[last_x][last_y]))
+ {
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+ int last_element_old = IntelliDrawBuffer[last_x][last_y];
+ int last_direction_old = getOpenDirectionFromPool(last_element_old);
+ int last_direction_new = last_direction_old | dir_opposite;
+
+ last_element_new = getPoolFromOpenDirection(last_direction_new);
+
+ direction |= dir;
+ }
+ }
+
+ /* special corrections needed for intuitively correct acid pool drawing */
+ if (last_element_new == EL_EMPTY)
+ last_element_new = new_element;
+ else if (last_element_new != EL_UNDEFINED)
+ new_element = last_element_new;
+
+ new_element = getPoolFromOpenDirectionNotEmpty(direction, new_element);
+
+ if (last_element_new != EL_UNDEFINED)
+ MergeAndCloseNeighbourElements(x, y, &new_element,
+ last_x, last_y, &last_element_new,
+ getClosedPool, change_level);
+ }
+ else if (IS_EMC_PILLAR(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+ int direction = MV_NONE;
+ int i;
+
+ /* if old element is of same kind, keep all existing directions */
+ if (IS_EMC_PILLAR(old_element))
+ direction |= getOpenDirectionFromPillar(old_element);
+
+ for (i = MV_BIT_UP; i <= MV_BIT_DOWN; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+
+ if (last_x == xx && last_y == yy && IN_LEV_FIELD(last_x, last_y) &&
+ IS_EMC_PILLAR(IntelliDrawBuffer[last_x][last_y]))
+ {
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+ int last_element_old = IntelliDrawBuffer[last_x][last_y];
+ int last_direction_old = getOpenDirectionFromPillar(last_element_old);
+ int last_direction_new = last_direction_old | dir_opposite;
+
+ last_element_new = getPillarFromOpenDirection(last_direction_new);
+
+ direction |= dir;
+ }
+ }
+
+ new_element = getPillarFromOpenDirectionNotEmpty(direction, new_element);
+
+ if (last_element_new != EL_UNDEFINED)
+ MergeAndCloseNeighbourElements(x, y, &new_element,
+ last_x, last_y, &last_element_new,
+ getClosedPillar, change_level);
+ }
+ else if (IS_DC_STEELWALL_2(new_element))
+ {
+ int last_element_new = EL_UNDEFINED;
+ int direction = MV_NONE;
+ int i;
+
+ /* if old element is of same kind, keep all existing directions */
+ if (IS_DC_STEELWALL_2(old_element))
+ direction |= getOpenDirectionFromSteel2(old_element);
+
+ for (i = 0; i < NUM_DIRECTIONS; i++)
+ {
+ int xx = x + xy[i][0];
+ int yy = y + xy[i][1];
+
+ if (last_x == xx && last_y == yy && IN_LEV_FIELD(last_x, last_y) &&
+ IS_DC_STEELWALL_2(IntelliDrawBuffer[last_x][last_y]))
+ {
+ int dir = MV_DIR_FROM_BIT(i);
+ int dir_opposite = MV_DIR_OPPOSITE(dir);
+ int last_element_old = IntelliDrawBuffer[last_x][last_y];
+ int last_direction_old = getOpenDirectionFromSteel2(last_element_old);
+ int last_direction_new = last_direction_old | dir_opposite;
+
+ last_element_new = getSteel2FromOpenDirection(last_direction_new);