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(svn r4373) Rewrite GetSlopeZ_TunnelBridge() and slightly change its behavior: 

- Report the correct z alongside the ramp when a foundation is present
- Always report the z under the bridge for a bridge middle part, except if the z hack is used
This should fix some weird behavior of the tile selector near bridges
release/0.5
tron 2006-04-12 05:19:19 +00:00
parent 39ebdae045
commit 82afa4caf2
1 changed files with 46 additions and 55 deletions
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101
tunnelbridge_cmd.c
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@ -84,6 +84,7 @@ enum {
BRIDGE_PARTLY_LEVELED_FOUNDATION = 1 << 1 | 1 << 2 | 1 << 4 | 1 << 8,
// no foundations (X,Y direction) (tileh's 0, 3, 6, 9, 12)
BRIDGE_NO_FOUNDATION = 1 << 0 | 1 << 3 | 1 << 6 | 1 << 9 | 1 << 12,
BRIDGE_HORZ_RAMP = (BRIDGE_PARTLY_LEVELED_FOUNDATION | BRIDGE_NO_FOUNDATION) & ~0
};
static inline const PalSpriteID *GetBridgeSpriteTable(int index, byte table)
@ -1078,71 +1079,61 @@ static void DrawTile_TunnelBridge(TileInfo *ti)
static uint GetSlopeZ_TunnelBridge(const TileInfo* ti)
{
TileIndex tile = ti->tile;
uint z = ti->z;
uint x = ti->x & 0xF;
uint y = ti->y & 0xF;
uint tileh = ti->tileh;
// swap directions if Y tunnel/bridge to let the code handle the X case only.
if (ti->map5 & 1) uintswap(x,y); // XXX bogus: it could be a tunnel, bridge ramp or bridge middle tile
if (IsTunnel(tile)) {
uint pos = (DiagDirToAxis(GetTunnelDirection(tile)) == AXIS_X ? y : x);
// to the side of the tunnel/bridge?
if (IS_INT_INSIDE(y, 5, 10+1)) {
if (IsTunnel(ti->tile)) return z;
// bridge?
if (IsBridge(ti->tile)) {
if (IsBridgeRamp(ti->tile)) {
if (BRIDGE_FULL_LEVELED_FOUNDATION & (1 << tileh)) // 7, 11, 13, 14
z += 8;
// no ramp for bridge ending
if ((BRIDGE_PARTLY_LEVELED_FOUNDATION & (1 << tileh) || BRIDGE_NO_FOUNDATION & (1 << tileh)) && tileh != 0) {
return z + 8;
} else if (!(ti->map5 & 0x20)) { // northern / southern ending
// ramp
return z + (x >> 1) + 1;
} else {
// ramp in opposite dir
return z + ((x ^ 0xF) >> 1);
}
} else {
// build on slopes?
if (tileh != 0) z += 8;
// keep the same elevation because we're on the bridge?
if (_get_z_hint >= z + 8) return _get_z_hint;
// actually on the bridge, but not yet in the shared area.
if (!IS_INT_INSIDE(x, 5, 10 + 1)) return GetBridgeHeight(ti->tile) + 8;
// in the shared area, assume that we're below the bridge, cause otherwise the hint would've caught it.
// if rail or road below then it means it's possibly build on slope below the bridge.
if (IsTransportUnderBridge(ti->tile)) {
uint f = _bridge_foundations[GetBridgeAxis(ti->tile)][tileh];
// make sure that the slope is not inclined foundation
if (IS_BYTE_INSIDE(f, 1, 15)) return z;
// change foundation type? XXX - should be const; accessor function!
if (f != 0) tileh = _inclined_tileh[f - 15];
}
// no transport route, fallback to default
}
}
// In the tunnel entrance?
if (5 <= pos && pos <= 10) return z;
} else {
if (IsBridge(ti->tile) && IsBridgeMiddle(ti->tile) && IsTransportUnderBridge(ti->tile)) {
uint f;
if (tileh != 0) z += 8;
f = _bridge_foundations[GetBridgeAxis(ti->tile)][tileh];
if (IS_BYTE_INSIDE(f, 1, 15)) return z;
if (f != 0) tileh = _inclined_tileh[f - 15];
if (IsBridgeRamp(tile)) {
DiagDirection dir = GetBridgeRampDirection(tile);
uint pos = (DiagDirToAxis(dir) == AXIS_X ? y : x);
// On the bridge ramp?
if (5 <= pos && pos <= 10) {
uint delta;
if (HASBIT(BRIDGE_HORZ_RAMP, tileh)) return z + 8;
if (HASBIT(BRIDGE_FULL_LEVELED_FOUNDATION, tileh)) z += 8;
switch (dir) {
default:
case DIAGDIR_NE: delta = (15 - x) / 2; break;
case DIAGDIR_SE: delta = y / 2; break;
case DIAGDIR_SW: delta = x / 2; break;
case DIAGDIR_NW: delta = (15 - y) / 2; break;
}
return z + 1 + delta;
} else {
uint f = GetBridgeFoundation(tileh, DiagDirToAxis(dir));
if (f != 0) {
if (f < 15) return z + 8;
tileh = _inclined_tileh[f - 15];
}
}
} else {
// HACK on the bridge?
if (_get_z_hint >= z + 8 + (tileh == 0 ? 0 : 8)) return _get_z_hint;
if (IsTransportUnderBridge(tile)) {
uint f = _bridge_foundations[GetBridgeAxis(tile)][tileh];
if (f != 0) {
if (f < 15) return z + 8;
tileh = _inclined_tileh[f - 15];
}
}
}
}
// default case
return GetPartialZ(ti->x & 0xF, ti->y & 0xF, tileh) + ti->z;
return z + GetPartialZ(x, y, tileh);
}
static uint GetSlopeTileh_TunnelBridge(TileIndex tile, uint tileh)