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/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file viewport.cpp Handling of all viewports.
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/**
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* @file viewport.cpp Handling of all viewports.
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*
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* \verbatim
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* The in-game coordinate system looks like this *
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* *
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* ^ Z *
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* | *
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* | *
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* | *
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* | *
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* / \ *
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* / \ *
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* / \ *
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@@ -99,25 +100,26 @@ struct ParentSpriteToDraw {
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int first_child; ///< the first child to draw.
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bool comparison_done; ///< Used during sprite sorting: true if sprite has been compared with all other sprites
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};
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/** Enumeration of multi-part foundations */
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enum FoundationPart {
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FOUNDATION_PART_NONE = 0xFF, ///< Neither foundation nor groundsprite drawn yet.
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FOUNDATION_PART_NORMAL = 0, ///< First part (normal foundation or no foundation)
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FOUNDATION_PART_HALFTILE = 1, ///< Second part (halftile foundation)
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FOUNDATION_PART_END
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};
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/** Mode of "sprite combining"
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/**
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* Mode of "sprite combining"
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* @see StartSpriteCombine
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*/
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enum SpriteCombineMode {
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SPRITE_COMBINE_NONE, ///< Every #AddSortableSpriteToDraw start its own bounding box
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SPRITE_COMBINE_PENDING, ///< %Sprite combining will start with the next unclipped sprite.
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SPRITE_COMBINE_ACTIVE, ///< %Sprite combining is active. #AddSortableSpriteToDraw outputs child sprites.
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};
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typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
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typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
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typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
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typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
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@@ -439,25 +441,26 @@ Point GetTileZoomCenterWindow(bool in, W
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if (in) {
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x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
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y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
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} else {
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x = vp->width - (_cursor.pos.x - vp->left);
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y = vp->height - (_cursor.pos.y - vp->top);
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}
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/* Get the tile below the cursor and center on the zoomed-out center */
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return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
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}
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/** Update the status of the zoom-buttons according to the zoom-level
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/**
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* Update the status of the zoom-buttons according to the zoom-level
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* of the viewport. This will update their status and invalidate accordingly
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* @param w Window pointer to the window that has the zoom buttons
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* @param vp pointer to the viewport whose zoom-level the buttons represent
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* @param widget_zoom_in widget index for window with zoom-in button
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* @param widget_zoom_out widget index for window with zoom-out button */
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void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
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{
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w->SetWidgetDisabledState(widget_zoom_in, vp->zoom == ZOOM_LVL_MIN);
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w->SetWidgetDirty(widget_zoom_in);
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w->SetWidgetDisabledState(widget_zoom_out, vp->zoom == ZOOM_LVL_MAX);
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w->SetWidgetDirty(widget_zoom_out);
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@@ -602,25 +605,26 @@ static void AddCombinedSprite(SpriteID i
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const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
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if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
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pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
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pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
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pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
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return;
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const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
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AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
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}
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/** Draw a (transparent) sprite at given coordinates with a given bounding box.
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/**
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* Draw a (transparent) sprite at given coordinates with a given bounding box.
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* The bounding box extends from (x + bb_offset_x, y + bb_offset_y, z + bb_offset_z) to (x + w - 1, y + h - 1, z + dz - 1), both corners included.
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* Bounding boxes with bb_offset_x == w or bb_offset_y == h or bb_offset_z == dz are allowed and produce thin slices.
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*
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* @note Bounding boxes are normally specified with bb_offset_x = bb_offset_y = bb_offset_z = 0. The extent of the bounding box in negative direction is
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* defined by the sprite offset in the grf file.
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* However if modifying the sprite offsets is not suitable (e.g. when using existing graphics), the bounding box can be tuned by bb_offset.
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*
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* @pre w >= bb_offset_x, h >= bb_offset_y, dz >= bb_offset_z. Else w, h or dz are ignored.
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*
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* @param image the image to combine and draw,
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* @param pal the provided palette,
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* @param x position X (world) of the sprite,
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@@ -1411,25 +1415,26 @@ void ViewportDoDraw(const ViewPort *vp,
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if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
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_cur_dpi = old_dpi;
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_vd.string_sprites_to_draw.Clear();
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_vd.tile_sprites_to_draw.Clear();
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_vd.parent_sprites_to_draw.Clear();
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_vd.parent_sprites_to_sort.Clear();
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_vd.child_screen_sprites_to_draw.Clear();
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}
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/** Make sure we don't draw a too big area at a time.
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/**
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* Make sure we don't draw a too big area at a time.
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* If we do, the sprite memory will overflow. */
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static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
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{
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if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
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if ((bottom - top) > (right - left)) {
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int t = (top + bottom) >> 1;
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ViewportDrawChk(vp, left, top, right, t);
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ViewportDrawChk(vp, left, t, right, bottom);
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} else {
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int t = (left + right) >> 1;
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ViewportDrawChk(vp, left, top, t, bottom);
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ViewportDrawChk(vp, t, top, right, bottom);
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@@ -1850,25 +1855,26 @@ void PlaceObject()
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pt.x += 8;
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pt.y += 8;
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}
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_tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
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_tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
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w = GetCallbackWnd();
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if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
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}
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/** Scrolls the viewport in a window to a given location.
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/**
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* Scrolls the viewport in a window to a given location.
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* @param x Desired x location of the map to scroll to (world coordinate).
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* @param y Desired y location of the map to scroll to (world coordinate).
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* @param z Desired z location of the map to scroll to (world coordinate). Use \c -1 to scroll to the height of the map at the \a x, \a y location.
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* @param w %Window containing the viewport.
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* @param instant Jump to the location instead of slowly moving to it.
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* @return Destination of the viewport was changed (to activate other actions when the viewport is already at the desired position).
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*/
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bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
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{
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/* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
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if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
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@@ -1896,25 +1902,26 @@ void SetRedErrorSquare(TileIndex tile)
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{
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TileIndex old;
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old = _thd.redsq;
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_thd.redsq = tile;
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if (tile != old) {
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if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
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if (old != INVALID_TILE) MarkTileDirtyByTile(old);
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}
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}
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/** Highlight \a w by \a h tiles at the cursor.
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/**
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* Highlight \a w by \a h tiles at the cursor.
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* @param w Width of the highlighted tiles rectangle.
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* @param h Height of the highlighted tiles rectangle.
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*/
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void SetTileSelectSize(int w, int h)
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{
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_thd.new_size.x = w * TILE_SIZE;
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_thd.new_size.y = h * TILE_SIZE;
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_thd.new_outersize.x = 0;
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_thd.new_outersize.y = 0;
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}
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void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
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@@ -2020,25 +2027,26 @@ void UpdateTileSelection()
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_thd.drawstyle = _thd.new_drawstyle;
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_thd.pos = _thd.new_pos;
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_thd.size = _thd.new_size;
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_thd.outersize = _thd.new_outersize;
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_thd.dirty = 0xff;
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/* draw the new selection? */
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if (_thd.new_drawstyle) SetSelectionTilesDirty();
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}
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}
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/** Displays the measurement tooltips when selecting multiple tiles
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/**
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* Displays the measurement tooltips when selecting multiple tiles
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* @param str String to be displayed
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* @param paramcount number of params to deal with
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* @param params (optional) up to 5 pieces of additional information that may be added to a tooltip
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*/
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static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[])
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{
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if (!_settings_client.gui.measure_tooltip) return;
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GuiShowTooltips(str, paramcount, params, TCC_LEFT_CLICK);
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}
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/** highlighting tiles while only going over them with the mouse */
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void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
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@@ -2093,25 +2101,26 @@ void VpSetPresizeRange(TileIndex from, T
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_thd.next_drawstyle = HT_RECT;
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/* show measurement only if there is any length to speak of */
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if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance);
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}
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static void VpStartPreSizing()
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{
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_thd.selend.x = -1;
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_special_mouse_mode = WSM_PRESIZE;
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}
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/** returns information about the 2x1 piece to be build.
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/**
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* returns information about the 2x1 piece to be build.
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* The lower bits (0-3) are the track type. */
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static HighLightStyle Check2x1AutoRail(int mode)
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{
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int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
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int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
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int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
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int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
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switch (mode) {
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default: NOT_REACHED();
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case 0: // end piece is lower right
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if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
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@@ -2126,25 +2135,26 @@ static HighLightStyle Check2x1AutoRail(i
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case 2:
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if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
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if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
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return HT_DIR_X;
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case 3:
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if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
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if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
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return HT_DIR_X;
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}
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}
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/** Check if the direction of start and end tile should be swapped based on
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/**
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* Check if the direction of start and end tile should be swapped based on
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* the dragging-style. Default directions are:
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* in the case of a line (HT_RAIL, HT_LINE): DIR_NE, DIR_NW, DIR_N, DIR_E
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* in the case of a rect (HT_RECT, HT_POINT): DIR_S, DIR_E
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* For example dragging a rectangle area from south to north should be swapped to
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* north-south (DIR_S) to obtain the same results with less code. This is what
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* the return value signifies.
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* @param style HighLightStyle dragging style
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* @param start_tile start tile of drag
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* @param end_tile end tile of drag
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* @return boolean value which when true means start/end should be swapped */
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static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
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{
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@@ -2156,25 +2166,26 @@ static bool SwapDirection(HighLightStyle
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switch (style & HT_DRAG_MASK) {
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case HT_RAIL:
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case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
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case HT_RECT:
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case HT_POINT: return (end_x != start_x && end_y < start_y);
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default: NOT_REACHED();
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}
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return false;
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}
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/** Calculates height difference between one tile and another.
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/**
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* Calculates height difference between one tile and another.
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* Multiplies the result to suit the standard given by #TILE_HEIGHT_STEP.
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*
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* To correctly get the height difference we need the direction we are dragging
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* in, as well as with what kind of tool we are dragging. For example a horizontal
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* autorail tool that starts in bottom and ends at the top of a tile will need the
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* maximum of SW, S and SE, N corners respectively. This is handled by the lookup table below
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* See #_tileoffs_by_dir in map.cpp for the direction enums if you can't figure out the values yourself.
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* @param style Highlighting style of the drag. This includes direction and style (autorail, rect, etc.)
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* @param distance Number of tiles dragged, important for horizontal/vertical drags, ignored for others.
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* @param start_tile Start tile of the drag operation.
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* @param end_tile End tile of the drag operation.
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* @return Height difference between two tiles. The tile measurement tool utilizes this value in its tooltip.
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