Operation Voodoo DPLL is an algorithm used for solving the boolean satisfiability problem (SAT). The SAT problem refers to the task of determining if a given boolean formula is satisfiable, i.e., if there is an assignment to the variables that makes the formula true. The Voodoo DPLL algorithm is an enhancement of the Davis-Putnam-Logemann-Loveland (DPLL) algorithm, which is a backtracking search algorithm. The DPLL algorithm uses a depth-first search to explore the possible assignments for the variables and backtracks when it encounters a contradiction.
Cutmanmike Posts: 11328 Joined: Mon Oct 06, 2003 3:41 pm Operating System Version (Optional): Windows 10 Location: United Kingdom Contact:
I believe the reason the original voodoo doll bug occurred is because the Doom engine spawns them in order, and sets them up as players, with the later starts overriding settings created by the prior starts. I believe the reason the original voodoo doll bug occurred is because the Doom engine spawns them in order, and sets them up as players, with the later starts overriding settings created by the prior starts.
The DPLL algorithm uses a depth-first search to explore the possible assignments for the variables and backtracks when it encounters a contradiction. The Voodoo DPLL algorithm introduces several heuristics to improve efficiency and speed up the search process. These heuristics include variable and value ordering heuristics, clause learning, and non-chronological backtracking.
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Spawning a voodoo doll
Post by Pinky's ass » Mon Jun 23, 2008 8:10 am
If I spawn a "DoomPlayer" and the player hurts him, he doesn't get hurt. Any idea about what I have to spawn or to create before in DECORATE?
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Re: Spawning a voodoo doll
Post by Graf Zahl » Mon Jun 23, 2008 8:19 am
You can't. The only means to spawn voodoo dolls is at map start. EnjayPosts: 26477 Joined: Tue Jul 15, 2003 4:58 pm Location: Scotland Contact:
Re: Spawning a voodoo doll
Post by Enjay » Mon Jun 23, 2008 8:22 am
So, if you needed one to appear in game after a period of time, you could (presumably) have one in a dummy sector and teleport it in.
Cutmanmike Posts: 11328 Joined: Mon Oct 06, 2003 3:41 pm Operating System Version (Optional): Windows 10 Location: United Kingdom Contact:
Re: Spawning a voodoo doll
Post by Cutmanmike » Mon Jun 23, 2008 8:25 am
Btw how does the map know which player start was put down last (not the voodoo doll)? I always thought it was a bit odd.
EnjayPosts: 26477 Joined: Tue Jul 15, 2003 4:58 pm Location: Scotland Contact:
Re: Spawning a voodoo doll
Post by Enjay » Mon Jun 23, 2008 8:32 am
I think every thing on a map has a thing number, starting with (I think) 0. At least that's how DeePsea reports errors with things. eg Thing number X of type Y at location Z,Z is not in a sector/is an unknown type etc.
HotWax Posts: 10002 Joined: Fri Jul 18, 2003 6:18 pm Location: Idaho Falls, IDRe: Spawning a voodoo doll
Post by HotWax » Mon Jun 23, 2008 10:38 am
Enjay wrote: I think every thing on a map has a thing number, starting with (I think) 0. At least that's how DeePsea reports errors with things. eg Thing number X of type Y at location Z,Z is not in a sector/is an unknown type etc.
Correct. The number is determined simply by the order they're placed in the editor. I believe the reason the original voodoo doll bug occurred is because the Doom engine spawns them in order, and sets them up as players, with the later starts overriding settings created by the prior starts.
So, if you needed one to appear in game after a period of time, you could (presumably) have one in a dummy sector and teleport it in.
Variable ordering heuristics determine the order in which variables are assigned values during the search. These heuristics aim to prioritize variables that are more likely to lead to a conflict earlier in the search process. This can help in quickly identifying unsatisfiable parts of the search space. Value ordering heuristics determine the order in which values are assigned to variables. These heuristics aim to prioritize values that are more likely to lead to a satisfying assignment. This can help in quickly finding a satisfying assignment if one exists. Clause learning is a technique used to avoid redundant search. When a conflict is encountered, the algorithm learns additional clauses from the conflict and adds them to the set of constraints. This helps in avoiding similar conflicts in the future and avoiding redundant search. Non-chronological backtracking is a technique used to jump back to a previous decision level without undoing all the assignments made at that level. This can help in efficiently exploring different branches of the search space. Overall, the Operation Voodoo DPLL algorithm combines these heuristics to improve the efficiency and effectiveness of solving SAT problems. It is widely used in SAT solvers and has been successful in solving large and complex SAT instances..
Reviews for "Operation Voodoo DPLL: A bridge between mathematics and computer science"
- Anna - 2 stars - I was really disappointed with "Operation voodoo dpll". The plot was confusing and hard to follow, and the characters were one-dimensional and uninteresting. I felt like the author was trying too hard to be clever and it just didn't work for me. I was also frustrated by the lack of resolution at the end - it left too many loose ends and unanswered questions. Overall, I would not recommend this book.
- John - 1 star - I can honestly say that "Operation voodoo dpll" is one of the worst books I've ever read. The writing style was choppy and disjointed, making it difficult to fully immerse myself in the story. The pacing was all over the place, with long stretches of boredom followed by rushed and confusing action scenes. The characters were completely unrelatable and lacked depth, making it impossible to care about what happened to them. I struggled to finish this book and would advise others to skip it altogether.
- Sarah - 2 stars - "Operation voodoo dpll" had so much potential, but ultimately fell flat for me. The concept was intriguing, but the execution was lacking. The dialogue felt forced and artificial, and the plot twists were predictable and cliché. I also found the protagonist to be unlikeable and uninteresting, which made it difficult for me to invest in the story. Overall, I was disappointed with this book and wouldn't recommend it to others.
- Mark - 1 star - I'm sorry, but "Operation voodoo dpll" just didn't do it for me. The writing was amateurish and filled with grammatical errors, making it an unpleasant reading experience. The plot was convoluted and hard to follow, and the characters were forgettable. The attempts at humor and wit fell flat, and I found myself frustrated with the lack of depth and development. I wouldn't recommend wasting your time on this book.