```java package com.chevyimpala.entity; import com.chevyimpala.ChevyImpala; import com.chevyimpala.ModItems; import net.minecraft.entity.*; import net.minecraft.entity.attribute.DefaultAttributeContainer; import net.minecraft.entity.attribute.EntityAttributes; import net.minecraft.entity.damage.DamageSource; import net.minecraft.entity.data.DataTracker; import net.minecraft.entity.data.TrackedData; import net.minecraft.entity.data.TrackedDataHandlerRegistry; import net.minecraft.entity.mob.MobEntity; import net.minecraft.entity.player.PlayerEntity; import net.minecraft.fluid.FluidTags; import net.minecraft.item.ItemStack; import net.minecraft.nbt.ReadView; import net.minecraft.nbt.WriteView; import net.minecraft.particle.ParticleTypes; import net.minecraft.server.world.ServerWorld; import net.minecraft.sound.SoundCategory; import net.minecraft.sound.SoundEvents; import net.minecraft.util.ActionResult; import net.minecraft.util.Hand; import net.minecraft.util.math.MathHelper; import net.minecraft.util.math.Vec3d; import net.minecraft.world.World; import software.bernie.geckolib.animatable.GeoEntity; import software.bernie.geckolib.animatable.instance.AnimatableInstanceCache; import software.bernie.geckolib.animatable.manager.AnimatableManager; import software.bernie.geckolib.animation.AnimationController; import software.bernie.geckolib.animation.RawAnimation; import software.bernie.geckolib.animation.object.PlayState; import software.bernie.geckolib.animation.state.AnimationTest; import software.bernie.geckolib.util.GeckoLibUtil; public class ImpalaEntity extends Entity implements GeoEntity { private static final TrackedData COLOR_VARIANT = DataTracker.registerData( ImpalaEntity.class, TrackedDataHandlerRegistry.INTEGER); private static final RawAnimation WHEELS_SPIN = RawAnimation.begin().thenLoop("animation.impala.wheels_spin"); private final AnimatableInstanceCache geoCache = GeckoLibUtil.createInstanceCache(this); private float forwardSpeed; private float turnAmount; private int soundCooldown; public ImpalaEntity(EntityType type, World world) { super(type, world); this.intersectionChecked = true; } public static DefaultAttributeContainer.Builder createAttributes() { return MobEntity.createMobAttributes() .add(EntityAttributes.MAX_HEALTH, 40.0) .add(EntityAttributes.MOVEMENT_SPEED, 0.0) .add(EntityAttributes.KNOCKBACK_RESISTANCE, 1.0); } @Override protected void initDataTracker(DataTracker.Builder builder) { builder.add(COLOR_VARIANT, 0); } public void setColorVariant(int color) { this.dataTracker.set(COLOR_VARIANT, color); } public int getColorVariant() { return this.dataTracker.get(COLOR_VARIANT); } @Override protected void writeCustomData(WriteView view) { view.putInt("ColorVariant", this.getColorVariant()); } @Override protected void readCustomData(ReadView view) { this.setColorVariant(view.getInt("ColorVariant", 0)); } @Override public ActionResult interactAt(PlayerEntity player, Vec3d hitPos, Hand hand) { if (player.shouldCancelInteraction()) return ActionResult.PASS; if (this.hasPassengers()) return ActionResult.PASS; if (!this.getEntityWorld().isClient) { player.startRiding(this); } return ActionResult.SUCCESS; } @Override public boolean isCollidable() { return true; } @Override public boolean isPushable() { return false; } @Override public boolean collidesWith(Entity other) { return other != this.getFirstPassenger() && super.collidesWith(other); } @Override public boolean handleFallDamage(float fallDistance, float damageMultiplier, DamageSource damageSource) { return false; } @Override public void tick() { super.tick(); // Check for underwater condition - disable movement boolean submerged = this.isSubmergedIn(FluidTags.WATER); boolean inWater = this.getEntityWorld().getFluidState(this.getBlockPos()).isIn(FluidTags.WATER); if (submerged || inWater) { this.forwardSpeed *= 0.9; if (this.forwardSpeed < 0.01f) this.forwardSpeed = 0; this.turnAmount = 0; } // Handle passenger-controlled movement if (this.hasPassengers() && this.getFirstPassenger() instanceof PlayerEntity driver) { if (submerged || inWater) { // Car cannot work underwater - slow to stop this.forwardSpeed *= 0.95; if (this.forwardSpeed < 0.01f) this.forwardSpeed = 0; } else { // Forward/backward float forward = driver.forwardSpeed; float sideways = driver.sidewaysSpeed; if (Math.abs(forward) > 0.01f) { // Accelerate/brake float targetSpeed = forward * 0.6f; this.forwardSpeed += (targetSpeed - this.forwardSpeed) * 0.1f; this.forwardSpeed = MathHelper.clamp(this.forwardSpeed, -0.6f, 0.6f); } else { // Friction deceleration this.forwardSpeed *= 0.95f; if (Math.abs(this.forwardSpeed) < 0.01f) this.forwardSpeed = 0; } // Steering - only when moving if (Math.abs(this.forwardSpeed) > 0.05f) { float turnFactor = 3.0f; if (this.forwardSpeed < 0) turnFactor = -3.0f; this.turnAmount = sideways * turnFactor; } else { this.turnAmount = 0; } } } else { // No driver - slow down this.forwardSpeed *= 0.9f; if (Math.abs(this.forwardSpeed) < 0.01f) this.forwardSpeed = 0; this.turnAmount = 0; } // Apply movement if (Math.abs(this.forwardSpeed) > 0.001f && !(submerged || inWater)) { // Rotate based on steering if (this.turnAmount != 0) { this.setYaw(this.getYaw() + this.turnAmount); this.setHeadYaw(this.getYaw()); } // Move forward in the direction the car is facing float yawRad = this.getYaw() * MathHelper.RADIANS_PER_DEGREE; double moveX = -MathHelper.sin(yawRad) * this.forwardSpeed; double moveZ = MathHelper.cos(yawRad) * this.forwardSpeed; this.setVelocity(moveX, this.getVelocity().y - 0.04, moveZ); this.move(MovementType.SELF, this.getVelocity()); // Clamp vertical velocity Vec3d vel = this.getVelocity(); this.setVelocity(vel.x, MathHelper.clamp(vel.y, -0.5, 0.5), vel.z); // Dust particles when moving if (this.getEntityWorld() instanceof ServerWorld serverWorld && Math.abs(this.forwardSpeed) > 0.2f) { if (this.getEntityWorld().random.nextInt(4) == 0) { serverWorld.spawnParticles(ParticleTypes.CLOUD, this.getX() + (this.random.nextDouble() - 0.5) * 1.5, this.getY() + 0.1, this.getZ() + (this.random.nextDouble() - 0.5) * 1.5, 1, 0.0, 0.0, 0.0, 0.02); } } // Engine sound this.soundCooldown--; if (this.soundCooldown <= 0) { float pitch = 1.0f + Math.abs(this.forwardSpeed) * 0.5f; this.getEntityWorld().playSound(null, this.getX(), this.getY(), this.getZ(), SoundEvents.ENTITY_MINECART_RIDING, SoundCategory.NEUTRAL, 0.3f, pitch); this.soundCooldown = 40; } } else if (!this.isOnGround()) { // Gravity when airborne this.setVelocity(this.getVelocity().x, this.getVelocity().y - 0.04, this.getVelocity().z); this.move(MovementType.SELF, this.getVelocity()); } } @Override protected void updatePassengerPosition(Entity passenger, Entity.PositionUpdater positionUpdater) { if (this.hasPassenger(passenger)) { float yawRad = this.getYaw() * MathHelper.RADIANS_PER_DEGREE; double offsetX = -MathHelper.sin(yawRad) * 0.4; double offsetZ = MathHelper.cos(yawRad) * 0.4; passenger.setPosition( this.getX() + offsetX, this.getY() + 0.8, this.getZ() + offsetZ ); } } @Override public ItemStack getPickBlockStack() { return switch (this.getColorVariant()) { case 1 -> new ItemStack(ModItems.IMPALA_GOLD); case 2 -> new ItemStack(ModItems.IMPALA_WHITE); case 3 -> new ItemStack(ModItems.IMPALA_BLACK); default -> new ItemStack(ModItems.IMPALA_LAUREL_GREEN); }; } // === GeckoLib === @Override public void registerControllers(AnimatableManager.ControllerRegistrar controllers) { controllers.add(new AnimationController<>("wheels", 0, this::wheelsPredicate)); } private PlayState wheelsPredicate(AnimationTest test) { if (Math.abs(this.forwardSpeed) > 0.01f) { double speed = Math.abs(this.forwardSpeed); test.setControllerSpeed(speed * 3.0f); return test.setAndContinue(WHEELS_SPIN); } return PlayState.STOP; } @Override public AnimatableInstanceCache getAnimatableInstanceCache() { return this.geoCache; } } ```