/**
* Determines height at given coordinate of a slope
* @param x x coordinate
* @param y y coordinate
* @param corners slope to examine
* @return height of given point of given slope
*/
uint GetPartialPixelZ(int x, int y, Slope corners)
{
if (IsHalftileSlope(corners)) {
switch (GetHalftileSlopeCorner(corners)) {
case CORNER_W:
if (x - y >= 0) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_S:
if (x - (y ^ 0xF) >= 0) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_E:
if (y - x >= 0) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_N:
if ((y ^ 0xF) - x >= 0) return GetSlopeMaxPixelZ(corners);
break;
default: NOT_REACHED();
}
}
int z = 0;
switch (RemoveHalftileSlope(corners)) {
case SLOPE_W:
if (x - y >= 0) {
z = (x - y) >> 1;
}
break;
case SLOPE_S:
y ^= 0xF;
if ((x - y) >= 0) {
z = (x - y) >> 1;
}
static void DrawClearLandFence(const TileInfo *ti)
{
/* combine fences into one sprite object */
StartSpriteCombine();
int maxz = GetSlopeMaxPixelZ(ti->tileh);
uint fence_nw = GetFence(ti->tile, DIAGDIR_NW);
if (fence_nw != 0) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_W);
SpriteID sprite = _clear_land_fence_sprites[fence_nw - 1] + _fence_mod_by_tileh_nw[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y - 15, 16, 31, maxz - z + 4, ti->z + z, false, 0, 15, -z);
}
uint fence_ne = GetFence(ti->tile, DIAGDIR_NE);
if (fence_ne != 0) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_E);
SpriteID sprite = _clear_land_fence_sprites[fence_ne - 1] + _fence_mod_by_tileh_ne[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x - 15, ti->y, 31, 16, maxz - z + 4, ti->z + z, false, 15, 0, -z);
}
uint fence_sw = GetFence(ti->tile, DIAGDIR_SW);
uint fence_se = GetFence(ti->tile, DIAGDIR_SE);
if (fence_sw != 0 || fence_se != 0) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_S);
if (fence_sw != 0) {
SpriteID sprite = _clear_land_fence_sprites[fence_sw - 1] + _fence_mod_by_tileh_sw[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y, 16, 16, maxz - z + 4, ti->z + z, false, 0, 0, -z);
}
if (fence_se != 0) {
SpriteID sprite = _clear_land_fence_sprites[fence_se - 1] + _fence_mod_by_tileh_se[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y, 16, 16, maxz - z + 4, ti->z + z, false, 0, 0, -z);
}
}
EndSpriteCombine();
}
static void DrawClearLandFence(const TileInfo *ti)
{
/* combine fences into one sprite object */
StartSpriteCombine();
int maxz = GetSlopeMaxPixelZ(ti->tileh);
bool fence_nw = GetFenceNW(ti->tile) != 0;
if (fence_nw) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_W);
SpriteID sprite = _clear_land_fence_sprites[GetFenceNW(ti->tile) - 1] + _fence_mod_by_tileh_nw[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y - 15, 16, 31, maxz - z + 4, ti->z + z, false, 0, 15, -z);
}
bool fence_ne = GetFenceNE(ti->tile) != 0;
if (fence_ne) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_E);
SpriteID sprite = _clear_land_fence_sprites[GetFenceNE(ti->tile) - 1] + _fence_mod_by_tileh_ne[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x - 15, ti->y, 31, 16, maxz - z + 4, ti->z + z, false, 15, 0, -z);
}
bool fence_sw = GetFenceSW(ti->tile) != 0;
bool fence_se = GetFenceSE(ti->tile) != 0;
if (fence_sw || fence_se) {
int z = GetSlopePixelZInCorner(ti->tileh, CORNER_S);
if (fence_sw) {
SpriteID sprite = _clear_land_fence_sprites[GetFenceSW(ti->tile) - 1] + _fence_mod_by_tileh_sw[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y, 16, 16, maxz - z + 4, ti->z + z, false, 0, 0, -z);
}
if (fence_se) {
SpriteID sprite = _clear_land_fence_sprites[GetFenceSE(ti->tile) - 1] + _fence_mod_by_tileh_se[ti->tileh];
AddSortableSpriteToDraw(sprite, PAL_NONE, ti->x, ti->y, 16, 16, maxz - z + 4, ti->z + z, false, 0, 0, -z);
}
}
EndSpriteCombine();
}