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(svn r22755) -Fix [FS#4727]: When marking tile selections dirty, use the height information of the corners instead of the surface slope. This is more accurate when the foundation is kind of undefined.

This commit is contained in:
frosch 2011-08-16 21:25:33 +00:00
parent 79508cb5c9
commit f34c666bc5
1 changed files with 7 additions and 2 deletions
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9
src/viewport.cpp
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@ -1723,8 +1723,13 @@ static void SetSelectionTilesDirty()
int bot_y = top_y;
do {
Point top = RemapCoords2(top_x, top_y); // topmost dirty point
Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
/* topmost dirty point */
TileIndex top_tile = TileVirtXY(top_x, top_y);
Point top = RemapCoords(top_x, top_y, GetTileMaxZ(top_tile));
/* bottommost point */
TileIndex bottom_tile = TileVirtXY(bot_x, bot_y);
Point bot = RemapCoords(bot_x + TILE_SIZE, bot_y + TILE_SIZE, GetTileZ(bottom_tile)); // bottommost point
/* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
* tile height/slope affects only the 'y' on-screen coordinate! */