hanchon
commented
6 months ago Update: Creating the minimal example was simpler than expected, you can run it locally:
_ = filterThatFails.Query(&w) always panic for me, without that line it works fine.
I used the v0.11.0 version of the lib for this example
package main
import (
"github.com/mlange-42/arche/ecs"
"github.com/mlange-42/arche/generic"
)
type Component1 struct {
}
type Component2 struct {
}
type Component3 struct {
}
type Component4 struct {
}
type Component5 struct {
}
type Component6 struct {
}
type Component7 struct {
}
type Component8 struct {
}
type Component9 struct {
}
type Component10 struct {
}
type Component11 struct {
}
type Component12 struct {
}
type Component13 struct {
}
type Component14 struct {
}
type Component15 struct {
}
type Component16 struct {
}
type Component17 struct {
}
type Component18 struct {
}
func main() {
w := ecs.NewWorld()
builderFirst10 := generic.NewMap10[
Component1,
Component2,
Component3,
Component4,
Component5,
Component6,
Component7,
Component8,
Component9,
Component10,
](&w)
_ = builderFirst10.New()
builderNext6 := generic.NewMap6[
Component12,
Component13,
Component14,
Component15,
Component16,
Component17,
](&w)
_ = builderNext6.New()
filter := generic.NewFilter1[Component1]()
res := filter.Query(&w)
for res.Next() {
continue
}
builderWithError := generic.NewMap1[Component18](&w)
_ = builderWithError.New()
filterThatFails := generic.NewFilter1[Component18]()
_ = filterThatFails.Query(&w)
}
mlange-42
Hi, I was playing with the lib and Ebitengine to create a simple word game. Everything was working as expected with no issues until I tried to add the 17th component. I was not able to have a minimal reproducible example, but I'll try to make one next week. I am opening the issue to start talking about the problem.
If I have 16 components everything is working great, no issues there. As soon as I add a new component (I created a simple boolean component in case the error was related to the pointer to the sprite):
Component:
Entity:
Scene loader:
After adding the line
entity.NewBackground(world), my draw function started to panic. Without that line, everything works as expected.Panic error:
Draw function:
I went deep into the panic error and I found that the issue in related to the
compilefunction for the filter. Used in the lineres := c.filter.Query(c.world). The problem is that the*ecs.archetypeisnilbut I can not figure it out why. The file isarche/ecs/archetype.goand hereaisnil, soa.layoutsis the reason of the panic.If I create new entities using any other component the program works without any issue, but as soon as I try to use the
BgSpritecomponent I get the panic.Sorry for the wall of text, maybe you can find my issue with this information, but I'll try to make a smaller example to replicate my issue so it's easier to debug.
Thanks
PD: I am using the current
main(1f3a73586dbf70c153a535bac5666fa72f1b02f1) but I also tried thev0.11.0tag and I found the same issue. PD2: I tried also to recreate the filter each time inside the draw function, but I got the same panic. PD3: If i keep adding more components different filters calls start to panic, I think that is related to the pages that are changing in the filearche/ecs/utils.goDebugger screenshots included:
