Dwarf Fortress Bug Tracker - Dwarf Fortress
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0000142Dwarf FortressMap Featurespublic2010-04-02 09:082012-04-06 19:03
Brandon816 
 
lowfeaturehave not tried
newopen 
 
 
0000142: Volcanoes' left sides can protrude buggily above slopes -- height check not symmetrical?
Compared to 40d, volcanoes now retain the same shape every z-level, and the obsidian barrier that, in 40d, would extend a few tiles outward from the volcano is now only 1 tile thick. This may or may not be by design, so I'm not sure if it is a bug or not.

Volcanoes whose rightmost edge is at the TOP of the mountain extend above ground, whereas volcanoes whose rightmost edge is at the bottom of a slope (mostly) correctly create a "pit" on the rest of the upward slope
magma pipe, volcanoes
has duplicate 0000308closed Footkerchief Volcano tubes extend above ground 
Issue History
2010-04-02 09:08Brandon816New Issue
2010-04-02 11:07murficwpnTag Attached: magma pipe
2010-04-02 11:21MysteriousAgesNote Added: 0000243
2010-04-02 12:17DaeNote Added: 0000255
2010-04-03 01:14Brandon816Note Added: 0000454
2010-04-03 14:57FootkerchiefRelationship addedhas duplicate 0000308
2010-04-08 12:50DoctorZuberNote Added: 0002130
2010-04-08 13:05diefortheswarmNote Added: 0002132
2010-04-10 08:54caldfirNote Added: 0002579
2010-04-10 09:06DoctorZuberNote Added: 0002582
2010-04-23 09:40caldfirNote Added: 0004718
2010-04-23 16:09LacTag Attached: volcanoes
2010-04-27 02:08Brandon816Note Added: 0005312
2010-04-28 14:04FootkerchiefCategoryGeneral => Map Features
2010-07-31 22:28InsanityPreludeNote Added: 0011348
2010-10-03 10:26SfonIssue Monitored: Sfon
2010-11-18 15:52DoctorZuberNote Added: 0013991
2012-04-02 12:00FootkerchiefIssue Monitored: caldfir
2012-04-02 12:00FootkerchiefNote Added: 0022036
2012-04-02 12:00FootkerchiefTag Attached: AWAITING UPDATE
2012-04-06 17:45KijiroNote Added: 0022137
2012-04-06 17:48KijiroNote Edited: 0022137bug_revision_view_page.php?bugnote_id=0022137#r8226
2012-04-06 19:03FootkerchiefSummaryVolcano Issues => Volcanoes' left sides can protrude buggily above slopes -- height check not symmetrical?
2012-04-06 19:03FootkerchiefDescription Updatedbug_revision_view_page.php?rev_id=8228#r8228
2012-04-06 19:03FootkerchiefTag Detached: AWAITING UPDATE

Notes
(0000243)
MysteriousAges   
2010-04-02 11:21   
Confirmed on two worldgens and two fortresses with a volcano.
(0000255)
Dae   
2010-04-02 12:17   
Confirmed. Also, the magma chamber stays vertical even when the mountain leans, making said chamber stick out of the ground like a giant obsidian tube filled with magma
(0000454)
Brandon816   
2010-04-03 01:14   
I would also like to add that in the few worlds I have generated (3 smaller, 1 medium), each world had only 1 single visible volcano in the entire world.
(0002130)
DoctorZuber   
2010-04-08 12:50   
Confirmed, from Z level 54 to z level 156 I have a nice tall lava pipe, which holds exactly the same shape at every single level. It may even extend further down but some sort of obstruction I can't actually see interrupts my view of the pipe at the bottom 20 levels or so.
(0002132)
diefortheswarm   
2010-04-08 13:05   
The obstruction is the magma sea.
(0002579)
caldfir   
2010-04-10 08:54   
Confirmed. For some fun before it (likely) gets fixed: puncture the tube. Flood the world with magma.
(0002582)
DoctorZuber   
2010-04-10 09:06   
my first guess would be that it is the magma sea yes, but since I didn't go down there to look and reveal was crashing on me, I didn't say for sure.

What was funny to me was that after 30 or so level down, I stopped being able to see the walls of the pipe, only the magma.
(0004718)
caldfir   
2010-04-23 09:40   
I think I have figured out the cause of the volcano tubes that extend out of the ground like a straw!

Volcanoes whose rightmost edge is at the TOP of the mountain extend above ground, whereas volcanoes whose rightmost edge is at the bottom of a slope (mostly) correctly create a "pit" on the rest of the upward slope.

My guess is that when the volcano gets placed, somewhere the algorithm mistakenly uses the x-coordinate rather than the z-coordinate to determine how deep the volcano tube should be.

I hope this gets fixed - it is a real deterrent from starting on volcanoes for reals (that is to say, I cannot resist puncturing the tube and watching the forest flood with red goo).
(0005312)
Brandon816   
2010-04-27 02:08   
On a related note, it seems the actual number of volcanoes never goes over the "minimum volcanoes" value when creating the world, so if you want more than 1 you have to turn that value up.
(0011348)
InsanityPrelude   
2010-07-31 22:28   
The tube being the same shape all the way down makes tapping it to actually use for anything other than hot, hot death rather difficult.
(0013991)
DoctorZuber   
2010-11-18 15:52   
Sadly, this bug is still around. Makes life much harder if you want to work with magma.
(0022036)
Footkerchief   
2012-04-02 12:00   
Reminder sent to: caldfir

Is the issue you described at 0000142:0002579 still present?
(0022137)
Kijiro   
2012-04-06 17:45   
(edited on: 2012-04-06 17:48)
This bug may be related to why this embark is so weird. The volcano just rises straight up like a tube and has a shear cliff face on the west. The embark location of the Dwarves on this map is hilarious!

The volcano tube is the same shape the whole way down.

http://dffd.wimbli.com/file.php?id=6121 [^]

http://i.imgur.com/WLHCc.png [^]