hi, I’m trying to convert some C code (full code in 🧵) to Kotlin Native

Model model = LoadModel("resources/model.obj")
Texture2D texture = LoadTexture("resources/texture.png");
model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set map diffuse texture

I can get close, but for some reason the generated cinterop Kotlin code has texture as a

val

, not a

var

val model: CValue<Model> = LoadModel("resources/model.obj")
val texture: CValue<Texture> = LoadTexture("resources/texture.png")

model.useContents {
  // model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture
  materials!![0].maps!![MATERIAL_MAP_DIFFUSE].texture = texture // ERROR val cannot be reassigned
}

any hints are appreciated!

What does IDEA say the type of

.texture

is? when you have over it?

snip.kt

https://kotlinlang.slack.com/archives/C3SGXARS6/p1593990644146500 Looks relevant Seems it’s not possible directly to set, only to copy

The texture is stored by value. When you set the value in C, it's not just changing a reference like in Kotlin. It's copying the fields one-by-one (I'm sure some implementations may copy all the memory of the struct instead, but same effect). This goes against Kotlin's set method, so you can just copy the relevant fields (or memset if you feel like being efficient, but dangerous)

so you can just copy the relevant fields (or memset if you feel like being efficient, but dangerous)

how? :) The problem is that

texture

is a

val