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Fixed an original bug in bridge footpath building

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Affects starting to build a footpath bridge on a sloped tile. The original code
was horribly broken. I think this is the most intuitive solution considering
the height of the arrow when selecting the tile.
This commit is contained in:
Timmy Weerwag
2015-03-23 00:34:00 +01:00
parent d4f495cc0e
commit 071ef2c88f
1 changed files with 10 additions and 6 deletions
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16
src/windows/footpath.c
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@@ -756,14 +756,18 @@ static void window_footpath_start_bridge_at_point(int screenX, int screenY)
return;
if (map_element_get_type(mapElement) == MAP_ELEMENT_TYPE_SURFACE) {
// ?
uint8 dl = ((mapElement->properties.surface.slope & 0x0F) << direction) & 0xFF;
uint8 dh = dl;
dl = (dl >> 4) & 0x0F;
dh = (dh & 0x0F) | dl;
// If we start the path on a slope, the arrow is slightly raised, so we
// expect the path to be slightly raised as well.
uint8_t slope = mapElement->properties.surface.slope;
z = mapElement->base_height;
if ((dh & 0x0C) == 0x0C)
if (slope & 0x10) {
// Steep diagonal slope
z += 4;
}
else if (slope & 0x0f) {
// Normal slope
z += 2;
}
} else {
z = mapElement->base_height;
if (map_element_get_type(mapElement) == MAP_ELEMENT_TYPE_PATH) {