#How to Use VS Collision (For Mod Dev)?

1 messages · Page 1 of 1 (latest)

silk trail
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I am trying my darndest to get the cannon from supplementaries to interact with ships.
I am just browsing the source rn but it will take me a while so i am leaving this here.

Any help with integrating collision will be appreciated.

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How to Use VS Collision (For Mod Dev)?

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What kind of object are the ships?

I understand their real blocks are millions of blocks away -but what is being projected that I can further implement projectile collisions onto?

narrow furnace
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it honestly depends on how the cannon projectile is setup

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most vanilla-MC distance checks, raycasts, etc are already redirected to ships if needed

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its only when mods use a custom distance check or raycast that things break

silk trail
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ah this one definitely is

narrow furnace
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anyway if a conventional raycast isn't possible to be put into the supplementary system, you can use some of the functions in VSGameUtilsKt

silk trail
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its kotlin right?

narrow furnace
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yes but you can use it in java

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java example: ```java
// level and my_blockpos are variables from elsewhere, depends on where you run this code
Ship the_ship = VSGameUtilsKt.getShipObjectManagingPos(level, my_blockpos)

// Ship will be null if there isn't a ship at that position
if (the_ship != null) {
// do something
}
// normal behaviour


kotlin example: ```kotlin
// level and my_blockpos are variables from elsewhere, depends on where you run this code
var the_ship = level.getShipObjectManagingPos(my_blockpos)

// Ship will be null if there isn't a ship at that position
if (the_ship != null) {
  // do something
}
// normal behaviour
silk trail
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i am trying to redirect some of those functions from RaycastUtilsKt i wonder if im in the wrong place

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this looks very helpful

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idk kotlin btw

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😳

narrow furnace
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I've never used raycast utils myself, since vanilla raycast methods (level.clip) should find shipyard positions

narrow furnace
silk trail
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another question

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would decompiling to java within Intellij be the right approach for kt?

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it seems to have missing mappings and poor syntax highlighting so im in doubt

floral hound
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why are you decompiling anything

floral hound
narrow furnace
floral hound
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ok but why

silk trail
floral hound
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ok?

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you don't need to know its code

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just use functions

silk trail
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i dont know what the functions are tho
nor would i know what they do

floral hound
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again, just use functions

narrow furnace
silk trail
narrow furnace
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decompiling it will probably make you more confused clueless

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oh and if you need to go between

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Vec3 and Vector3

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you can look at

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VectorConversionKitMcKt or something

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I forget its exact name

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JOML is the format VS uses, with Vector3f, Vector3dc, etc wheras minecraft has its own Vec3, Vec3i, etc

floral hound
narrow furnace
floral hound
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1.20.1 mc uses joml

narrow furnace
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no?

floral hound
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yea?

narrow furnace
silk trail
narrow furnace
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hang on a sec

floral hound
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ok there's Vec3 and Vec2

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but also a lot of joml

narrow furnace
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where is joml used? thonk

floral hound
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actually, i was wrong

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i thought it used joml

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huh

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🤔

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nvm then

narrow furnace
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maybe like

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1.21 or smthn uses joml

silk trail
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since your still here might we discuss this example which gives me hope?

package com.example.bulletfix.mixin;

import com.mrcrayfish.guns.entity.ProjectileEntity;
import java.util.function.Predicate;
import net.minecraft.world.level.ClipContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.phys.BlockHitResult;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
import org.valkyrienskies.mod.common.world.RaycastUtilsKt;

@Mixin(
        value = {ProjectileEntity.class},
        remap = false
)
public abstract class MixinProjectileEntity<T> {
  @Inject(
          method = {"Lcom/mrcrayfish/guns/entity/ProjectileEntity;rayTraceBlocks(Lnet/minecraft/world/level/Level;Lnet/minecraft/world/level/ClipContext;Ljava/util/function/Predicate;)Lnet/minecraft/world/phys/BlockHitResult;"},
          at = {@At("HEAD")},
          cancellable = true
  )
  private static void injectRayTraceBlocks(Level world, ClipContext context, Predicate<BlockState> ignorePredicate, CallbackInfoReturnable<BlockHitResult> cir) {
    cir.setReturnValue(RaycastUtilsKt.clipIncludeShips(world, context));
  }
}
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this is for 1.18 tho it looks simple

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and also for a different mod that messes with projectiles

narrow furnace
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mixins are very dependent on the mod you're changing

silk trail
narrow furnace
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so I would recommend trying to find the cannons projectiles code

silk trail
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ah it makes sense now

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thanks again

silk trail
narrow furnace
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ayy

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you could maybe look at fixing this aswell, if your interested

silk trail
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is it the aiming mode i bet

narrow furnace
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its something about

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/reload doing something funky with a fake level

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so its the wrong tick phase

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so VS gets angry

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its saying something about the onTagUpdated event