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Mgv6 mudflow: Also check for 'ignore' nodes

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Previously, when removing decorations we searched upwards and removed until we
found air or water. However, the node above the decoration can be 'ignore' if
a stacked decoration extends into the volume above the mapchunk. The result
could be a problematic column of air placed in the volume of 'ignore'. The
unnecessary placing of air also slows the function.

Add a check for 'ignore' nodes when removing decorations.
This commit is contained in:
paramat 2017-06-15 22:48:26 +01:00 committed by paramat
parent 2ab09bb486
commit 212945c7a3
1 changed files with 11 additions and 7 deletions
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18
src/mapgen_v6.cpp
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@ -913,21 +913,25 @@ void MapgenV6::moveMud(u32 remove_index, u32 place_index,
// use 'pos.X >= node_max.X' etc.
if (pos.X >= node_max.X || pos.X <= node_min.X ||
pos.Y >= node_max.Z || pos.Y <= node_min.Z) {
// 'above remove' node is above removed mud. If it is not air and not
// water it is a decoration that needs removing. Also search upwards
// for a possible stacked decoration.
// 'above remove' node is above removed mud. If it is not air, water or
// 'ignore' it is a decoration that needs removing. Also search upwards
// to remove a possible stacked decoration.
// Check for 'ignore' because stacked decorations can penetrate into
// 'ignore' nodes above the mapchunk.
while (vm->m_area.contains(above_remove_index) &&
vm->m_data[above_remove_index].getContent() != CONTENT_AIR &&
vm->m_data[above_remove_index].getContent() != c_water_source) {
vm->m_data[above_remove_index].getContent() != c_water_source &&
vm->m_data[above_remove_index].getContent() != CONTENT_IGNORE) {
vm->m_data[above_remove_index] = n_air;
vm->m_area.add_y(em, above_remove_index, 1);
}
// Mud placed may have half-buried a tall decoration, search above and
// remove.
// Mud placed may have partially-buried a stacked decoration, search
// above and remove.
vm->m_area.add_y(em, place_index, 1);
while (vm->m_area.contains(place_index) &&
vm->m_data[place_index].getContent() != CONTENT_AIR &&
vm->m_data[place_index].getContent() != c_water_source) {
vm->m_data[place_index].getContent() != c_water_source &&
vm->m_data[place_index].getContent() != CONTENT_IGNORE) {
vm->m_data[place_index] = n_air;
vm->m_area.add_y(em, place_index, 1);
}