assimp - aiGetMaterialTexture cuts first chars of texture Path

[LordAlbion]

Environment

• LWJGL version: 3.2.4
• LWJGL build #: 2
• Java version: jdk-13.0.1
• Platform: Windows
• Module: assimp

Description

Assimp retrieves name of the texture cut by first 4 first chars.

insted of "123.jpg"
i get "jpg " - looks like the buffer is moved by 4 chars more than should be

Some issue with encoding or with buffer read length

Example material and code to retrieve data:

For material:

# Blender MTL File: 'None'
# Material Count: 1

newmtl Material.001
Ns 500.039216
Ka 0.000000 0.000000 0.000000
Kd 1.000000 1.000000 1.000000
Ks 1.000000 1.000000 1.000000
Ke 0.000000 1.200000 0.000000
Ni 0.500000
d 1.000000
illum 2
map_Kd 123.jpg

For fallowing code

AIString mTexPath = AIString.calloc();
			aiGetMaterialTexture(mMaterial, 1, 0, mTexPath, (IntBuffer) null, null, null, null, null, null);
			
			System.out.println(mTexPath.dataString());

result: "jpg "
should be "123.jpg"

[LordAlbion]

could this be issue with pointer struct?
public abstract class Struct extends Pointer.Default {

**protected static final int DEFAULT_PACK_ALIGNMENT = Platform.get() == Platform.WINDOWS ? 8 : 0x4000_0000;**
protected static final int DEFAULT_ALIGN_AS       = 0;

similar definition in Pointer interface

/** The value of {@code sizeof(long)} for the current platform. */
int CLONG_SIZE  = POINTER_SIZE == 8 && Platform.get() == Platform.WINDOWS ? 4 : POINTER_SIZE;

[Spasi]

Hey @LordAlbion,

No, this is a simple type mismatch in LWJGL's definition for aiString. It was caused by this change, which I missed the last time the assimp bindings were updated. It will be fixed in the next 3.2.4 snapshot.

[LordAlbion]

Thanks