--- a/src/industry_cmd.cpp Fri Sep 14 22:25:00 2007 +0000
+++ b/src/industry_cmd.cpp Fri Sep 14 22:27:40 2007 +0000
@@ -36,6 +36,7 @@
#include "newgrf_industrytiles.h"
#include "newgrf_callbacks.h"
#include "misc/autoptr.hpp"
+#include "autoslope.h"
void ShowIndustryViewWindow(int industry);
void BuildOilRig(TileIndex tile);
@@ -1974,6 +1975,30 @@
static CommandCost TerraformTile_Industry(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new)
{
+ if (AutoslopeEnabled()) {
+ /* We imitate here TTDP's behaviour:
+ * - Both new and old slope must not be steep.
+ * - TileMaxZ must not be changed.
+ * - Allow autoslope by default.
+ * - Disallow autoslope if callback succeeds and returns non-zero.
+ */
+ Slope tileh_old = GetTileSlope(tile, NULL);
+ /* TileMaxZ must not be changed. Slopes must not be steep. */
+ if (!IsSteepSlope(tileh_old) && !IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
+ const IndustryGfx gfx = GetIndustryGfx(tile);
+ const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);
+
+ /* Call callback 3C 'disable autosloping for industry tiles'. */
+ if (HASBIT(itspec->callback_flags, CBM_INDT_AUTOSLOPE)) {
+ /* If the callback fails, allow autoslope. */
+ uint16 res = GetIndustryTileCallback(CBID_INDUSTRY_AUTOSLOPE, 0, 0, gfx, GetIndustryByTile(tile), tile);
+ if ((res == 0) || (res == CALLBACK_FAILED)) return _price.terraform;
+ } else {
+ // allow autoslope
+ return _price.terraform;
+ }
+ }
+ }
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); // funny magic bulldozer
}