feat: add entity explosion resistance option

Common/src/main/java/at/petrak/hexcasting/api/mod/HexConfig.java

@@ -27,6 +27,8 @@ public interface CommonConfigAccess {
 
         int artifactCooldown();
 
+        int entityExplosionResistance();
+
         long DEFAULT_DUST_MEDIA_AMOUNT = MediaConstants.DUST_UNIT;
         long DEFAULT_SHARD_MEDIA_AMOUNT = MediaConstants.SHARD_UNIT;
         long DEFAULT_CHARGED_MEDIA_AMOUNT = MediaConstants.CRYSTAL_UNIT;
@@ -36,6 +38,7 @@ public interface CommonConfigAccess {
         int DEFAULT_TRINKET_COOLDOWN = 5;
         int DEFAULT_ARTIFACT_COOLDOWN = 3;
 
+        int DEFAULT_ENTITY_EXPLOSION_RESISTANCE = 0;
     }
 
     public interface ClientConfigAccess {

Common/src/main/java/at/petrak/hexcasting/common/casting/actions/spells/OpExplode.kt

@@ -8,9 +8,13 @@ import at.petrak.hexcasting.api.casting.getPositiveDoubleUnderInclusive
 import at.petrak.hexcasting.api.casting.getVec3
 import at.petrak.hexcasting.api.casting.iota.Iota
 import at.petrak.hexcasting.api.misc.MediaConstants
+import at.petrak.hexcasting.api.mod.HexConfig
 import at.petrak.hexcasting.common.casting.actions.selectors.OpGetEntitiesBy
 import net.minecraft.core.BlockPos
 import net.minecraft.util.Mth
+import net.minecraft.world.effect.MobEffectInstance
+import net.minecraft.world.effect.MobEffects
+import net.minecraft.world.entity.LivingEntity
 import net.minecraft.world.level.Level
 import net.minecraft.world.phys.AABB
 import net.minecraft.world.phys.Vec3
@@ -53,6 +57,25 @@ class OpExplode(val fire: Boolean) : SpellAction {
             if (!env.canEditBlockAt(BlockPos.containing(pos)))
                 return
 
+            val resistanceLevel = HexConfig.common().entityExplosionResistance()
+
+            if (resistanceLevel > 0) {
+                val radius = strength * 4 / 3; // approximation
+                val aabb = AABB(pos.add(Vec3(-radius, -radius, -radius)), pos.add(Vec3(radius, radius, radius)))
+                val entitiesGot = env.world.getEntities(null, aabb)
+                    .filter { entity -> entity is LivingEntity && entity != env.castingEntity }
+                    .map { entity -> entity as LivingEntity }
+                entitiesGot.forEach { entity ->
+                    entity.addEffect(
+                        MobEffectInstance(
+                            MobEffects.DAMAGE_RESISTANCE,
+                            1, // 1 tick only, we want this to exclusively block the explosion
+                            resistanceLevel - 1
+                        )
+                    )
+                }
+            }
+
             env.world.explode(
                 env.castingEntity,
                 pos.x,

Fabric/src/main/java/at/petrak/hexcasting/fabric/FabricHexConfig.java

@@ -80,6 +80,8 @@ public static final class Common implements HexConfig.CommonConfigAccess, Config
         @ConfigEntry.Gui.Tooltip
         private int artifactCooldown = DEFAULT_ARTIFACT_COOLDOWN;
 
+        @ConfigEntry.Gui.Tooltip
+        private int entityExplosionResistance = DEFAULT_ENTITY_EXPLOSION_RESISTANCE;
 
         @Override
         public void validatePostLoad() throws ValidationException {
@@ -123,6 +125,11 @@ public int trinketCooldown() {
         public int artifactCooldown() {
             return artifactCooldown;
         }
+
+        @Override
+        public int entityExplosionResistance() {
+            return entityExplosionResistance;
+        }
     }
 
     @Config(name = "client")

Forge/src/main/java/at/petrak/hexcasting/forge/ForgeHexConfig.java

@@ -23,6 +23,8 @@ public class ForgeHexConfig implements HexConfig.CommonConfigAccess {
     private static ForgeConfigSpec.IntValue trinketCooldown;
     private static ForgeConfigSpec.IntValue artifactCooldown;
 
+    private static ForgeConfigSpec.IntValue entityExplosionResistance;
+
     public ForgeHexConfig(ForgeConfigSpec.Builder builder) {
         builder.push("Media Amounts");
         dustMediaAmount = builder.comment("How much media a single Amethyst Dust item is worth")
@@ -43,6 +45,11 @@ public ForgeHexConfig(ForgeConfigSpec.Builder builder) {
         artifactCooldown = builder.comment("Cooldown in ticks of a artifact")
             .defineInRange("artifactCooldown", DEFAULT_ARTIFACT_COOLDOWN, 0, Integer.MAX_VALUE);
         builder.pop();
+
+        builder.push("Misc");
+        entityExplosionResistance = builder.comment("How much entities should resist explosion damage, where the reduction is Value times 20%")
+                .defineInRange("entityExplosionResistance", DEFAULT_ENTITY_EXPLOSION_RESISTANCE, 0, 5);
+        builder.pop();
     }
 
     @Override
@@ -80,6 +87,11 @@ public int artifactCooldown() {
         return artifactCooldown.get();
     }
 
+    @Override
+    public int entityExplosionResistance() {
+        return entityExplosionResistance.get();
+    }
+
     public static class Client implements HexConfig.ClientConfigAccess {
         private static ForgeConfigSpec.BooleanValue ctrlTogglesOffStrokeOrder;
         private static ForgeConfigSpec.BooleanValue disableInworldScrolling;