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lwjglgamedev / lwjglbook-leg

Source code of the chapters of the book 3D Game Development with LWJGL 3
https://ahbejarano.gitbook.io/lwjglgamedev/
Apache License 2.0
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Error, i don't know whats happening, eclipse don't report any errors, i'm running the last episode code. #42

Closed oiramu closed 6 years ago

oiramu commented 7 years ago

java.lang.Exception: Error loading model at org.lwjglb.engine.loaders.assimp.StaticMeshesLoader.load(StaticMeshesLoader.java:45) at org.lwjglb.engine.loaders.assimp.StaticMeshesLoader.load(StaticMeshesLoader.java:37) at org.lwjglb.game.DummyGame.init(DummyGame.java:72) at org.lwjglb.engine.GameEngine.init(GameEngine.java:65) at org.lwjglb.engine.GameEngine.run(GameEngine.java:52) at java.lang.Thread.run(Unknown Source)

lwjglgamedev commented 7 years ago

Sorry for the late response.

It seems that ASSIMP is not able to load the model. Can you print the resource path and check that it can be read?

oiramu commented 7 years ago

Sorry for a late reply, i've got a busy week in college

Here is my path in dummygame line 72

Mesh[] terrainMesh = StaticMeshesLoader.load(file.getAbsolutePath(), "/models/terrain");

lwjglgamedev commented 7 years ago

It's difficult to get an idea. Have you checked that the file exists and can be read ? Maybe you can upload the file to see if there's a problem with the model.

blufish2004 commented 6 years ago

I encountered an issue with this as well. To troubleshoot, added the output of aiGetErrorString() to the exception where it gets thrown in StaticMeshesLoader. The stack trace is the same as that seen in the reporter's description, but with some added information... In my case, the following:

java.lang.Exception: Error loading model: Unable to open file "/home/blufish/gits/lwjglbook/file:/home/blufish/gits/lwjglbook/chapter27/c27-p1/target/game-c27-p1-1.0.jar!/models/house/house.obj".

That absolute path looks suspect to me, and I haven't dug in to what the absolute path for a Java Resource in a jar should look like, but I suspect it should be something more like file:/home/blufish/gits/lwjglbook/chapter27/c27-p1/target/game-c27-p1-1.0.jar!/models/house/house.obj.

Regardless, I can say with certainty that the file in question is indeed in the jar file:

$ unzip -l chapter27/c27-p1/target/game-c27-p1-1.0.jar  | grep house
        0  2017-11-15 18:41   models/house/
       53  2017-11-15 18:41   models/house/SOURCE.txt
  1754174  2017-11-15 18:41   models/house/house_text.jpg
    47270  2017-11-15 18:41   models/house/house.obj
      146  2017-11-15 18:41   models/house/house.mtl
  2491829  2017-11-15 18:41   models/house/house_text_bmap.jpg

I was able to work around this problem by copying the models directory to the local filesystem, and altering DummyGame.init(...) to point to that location (rather than pulling from resources in the .jar). So, there's a solution, but we really ought to figure out what's going on with the resource, and fix the code in the project so that everything builds and runs without modification.

lwjglgamedev commented 6 years ago

Ok, I see the problem now. The problem occurs when the reosurces are inside the jar file. If the resources are just in the CLASSPATH it should work, but if they are inside a JAR, assimp is not able to load it. I just tend to embed the resources so they can lodaded via CLASSPATH for convenience, but for this case, it may be confusing.

I will review the code and the chapter to use direct file access, and stress this out in the book.

lwjglgamedev commented 6 years ago

I've just modified the samples to avoid confussions. I will close now this issue.