Reimplement IOverrideCollisions collide mixin

Author: itsmeow

common/src/main/java/dev/itsmeow/whisperwoods/mixin/BlockCollisionsMixin.java

@@ -0,0 +1,37 @@
+package dev.itsmeow.whisperwoods.mixin;
+
+import dev.itsmeow.whisperwoods.util.IOverrideCollisions;
+import net.minecraft.world.level.BlockCollisions;
+import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.phys.shapes.CollisionContext;
+import net.minecraft.world.phys.shapes.EntityCollisionContext;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+@Mixin(BlockCollisions.class)
+public class BlockCollisionsMixin {
+
+    @Shadow
+    @Final
+    private CollisionContext context;
+
+    @Inject(at = @At(value = "INVOKE_ASSIGN", target = "Lnet/minecraft/world/level/BlockGetter;getBlockState(Lnet/minecraft/core/BlockPos;)Lnet/minecraft/world/level/block/state/BlockState;"), method = "computeNext()Lnet/minecraft/world/phys/shapes/VoxelShape;", cancellable = true, locals = LocalCapture.CAPTURE_FAILSOFT)
+    private void computeNext(CallbackInfoReturnable<VoxelShape> cir, int i, int j, int k, int l, BlockGetter blockGetter, BlockState blockState) {
+        if(this.context instanceof EntityCollisionContext eContext) {
+            if(eContext.getEntity() instanceof IOverrideCollisions o) {
+                if(o.canPassThrough(blockState)) {
+                    cir.setReturnValue(Shapes.empty());
+                }
+            }
+        }
+    }
+
+}

common/src/main/resources/whisperwoods.mixins.json

@@ -4,7 +4,8 @@
   "compatibilityLevel": "JAVA_17",
   "minVersion": "0.8",
   "mixins": [
-    "LivingEntityMixin"
+    "LivingEntityMixin",
+    "BlockCollisionsMixin"
   ],
   "client": [
     "LayerDefinitionsMixin"