1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/java/ftbsc/bscv/patches/BlockPushPatch.java b/src/main/java/ftbsc/bscv/patches/BlockPushPatch.java
new file mode 100644
index 0000000..50fb677
--- /dev/null
+++ b/src/main/java/ftbsc/bscv/patches/BlockPushPatch.java
@@ -0,0 +1,46 @@
+package ftbsc.bscv.patches;
+
+import ftbsc.lll.processor.annotations.Injector;
+import ftbsc.lll.processor.annotations.Patch;
+import ftbsc.lll.processor.annotations.Target;
+import ftbsc.lll.tools.InsnSequence;
+import net.minecraft.client.entity.player.ClientPlayerEntity;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.eventbus.api.Cancelable;
+import net.minecraftforge.eventbus.api.Event;
+
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.*;
+
+public class BlockPushPatch {
+
+	@Cancelable
+	public static class PlayerBlockPushEvent extends Event {}
+
+	public static boolean shouldCancelBlockCollisions() {
+		return MinecraftForge.EVENT_BUS.post(new PlayerBlockPushEvent());
+	}
+
+	@Patch(value = ClientPlayerEntity.class, reason = "add hook to cancel block collisions")
+	public abstract static class BlockCollisionsOverride implements Opcodes {
+		@Target
+		abstract void moveTowardsClosestSpace(double x, double z);
+
+		@Injector
+		public void inject(ClassNode clazz, MethodNode main) {
+			LabelNode skip = new LabelNode();
+			InsnSequence is = new InsnSequence();
+			is.add(new MethodInsnNode(
+				INVOKESTATIC,
+				"ftbsc/bscv/patches/BlockPushPatch",
+				"shouldCancelBlockCollisions",
+				"()Z"
+			));
+			is.add(new JumpInsnNode(IFEQ, skip));
+			is.add(new InsnNode(RETURN));
+			is.add(skip);
+
+			main.instructions.insert(is); // hook at top
+		}
+	}
+}