[1.7.10] Vehicle hopping blocks

[Romejanic]

Hey everyone.

 

I am trying to make a vehicle. A car to be exact. It works pretty smoothly, but the only problem is that I need to get it hopping up blocks. They way I want it to work is that if you collide with a block, and there is a nonsolid/air block above it, it moves up onto the block. If there is however, a solid block above it, it will take crash damage. Any ideas?

 

Here's my code so far:

package assets.battlefield.common.entity.vechicle;

import assets.battlefield.common.util.EntityUtil;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import java.util.List;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.DamageSource;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;

public class EntityJeep extends Entity implements IBattlefieldVehicle
{
    /** true if no player in boat */
    private boolean isBoatEmpty;
    private double speedMultiplier;
    private int boatPosRotationIncrements;
    private double boatX;
    private double boatY;
    private double boatZ;
    private double boatYaw;
    private double boatPitch;
    @SideOnly(Side.CLIENT)
    private double velocityX;
    @SideOnly(Side.CLIENT)
    private double velocityY;
    @SideOnly(Side.CLIENT)
    private double velocityZ;
    private static final String __OBFID = "CL_00001667";

    public EntityJeep(World p_i1704_1_)
    {
        super(p_i1704_1_);
        this.isBoatEmpty = true;
        this.speedMultiplier = 0.07D;
        this.preventEntitySpawning = true;
        this.setSize(1.5F, 0.6F);
        this.yOffset = this.height / 2.0F;
    }

    /**
     * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
     * prevent them from trampling crops
     */
    protected boolean canTriggerWalking()
    {
        return false;
    }

    protected void entityInit()
    {
        this.dataWatcher.addObject(17, new Integer(0));
        this.dataWatcher.addObject(18, new Integer(1));
        this.dataWatcher.addObject(19, new Float(0.0F));
    }

    /**
     * Returns a boundingBox used to collide the entity with other entities and blocks. This enables the entity to be
     * pushable on contact, like boats or minecarts.
     */
    public AxisAlignedBB getCollisionBox(Entity p_70114_1_)
    {
        return p_70114_1_.boundingBox;
    }

    /**
     * returns the bounding box for this entity
     */
    public AxisAlignedBB getBoundingBox()
    {
        return this.boundingBox;
    }

    /**
     * Returns true if this entity should push and be pushed by other entities when colliding.
     */
    public boolean canBePushed()
    {
        return true;
    }

    public EntityJeep(World p_i1705_1_, double p_i1705_2_, double p_i1705_4_, double p_i1705_6_)
    {
        this(p_i1705_1_);
        this.setPosition(p_i1705_2_, p_i1705_4_ + (double)this.yOffset, p_i1705_6_);
        this.motionX = 0.0D;
        this.motionY = 0.0D;
        this.motionZ = 0.0D;
        this.prevPosX = p_i1705_2_;
        this.prevPosY = p_i1705_4_;
        this.prevPosZ = p_i1705_6_;
    }

    /**
     * Returns the Y offset from the entity's position for any entity riding this one.
     */
    public double getMountedYOffset()
    {
        return (double)this.height * 0.0D - 0.30000001192092896D + 0.6d;
    }

    /**
     * Called when the entity is attacked.
     */
    public boolean attackEntityFrom(DamageSource p_70097_1_, float p_70097_2_)
    {
        if (this.isEntityInvulnerable())
        {
            return false;
        }
        else if (!this.worldObj.isRemote && !this.isDead)
        {
            this.setForwardDirection(-this.getForwardDirection());
            this.setTimeSinceHit(10);
            this.setDamageTaken(this.getDamageTaken() + p_70097_2_ * 10.0F);
            this.setBeenAttacked();
            boolean flag = p_70097_1_.getEntity() instanceof EntityPlayer && ((EntityPlayer)p_70097_1_.getEntity()).capabilities.isCreativeMode;

            if (flag || this.getDamageTaken() > 40.0F)
            {
                if (this.riddenByEntity != null)
                {
                    this.riddenByEntity.mountEntity(this);
                }

                if (!flag)
                {
                    this.func_145778_a(Items.boat, 1, 0.0F);
                }

                this.setDead();
            }

            return true;
        }
        else
        {
            return true;
        }
    }

    /**
     * Setups the entity to do the hurt animation. Only used by packets in multiplayer.
     */
    @SideOnly(Side.CLIENT)
    public void performHurtAnimation()
    {
        this.setForwardDirection(-this.getForwardDirection());
        this.setTimeSinceHit(10);
        this.setDamageTaken(this.getDamageTaken() * 11.0F);
    }

    /**
     * Returns true if other Entities should be prevented from moving through this Entity.
     */
    public boolean canBeCollidedWith()
    {
        return !this.isDead;
    }

    /**
     * Sets the position and rotation. Only difference from the other one is no bounding on the rotation. Args: posX,
     * posY, posZ, yaw, pitch
     */
    @SideOnly(Side.CLIENT)
    public void setPositionAndRotation2(double p_70056_1_, double p_70056_3_, double p_70056_5_, float p_70056_7_, float p_70056_8_, int p_70056_9_)
    {
        if (this.isBoatEmpty)
        {
            this.boatPosRotationIncrements = p_70056_9_ + 5;
        }
        else
        {
            double d3 = p_70056_1_ - this.posX;
            double d4 = p_70056_3_ - this.posY;
            double d5 = p_70056_5_ - this.posZ;
            double d6 = d3 * d3 + d4 * d4 + d5 * d5;

            if (d6 <= 1.0D)
            {
                return;
            }

            this.boatPosRotationIncrements = 3;
        }

        this.boatX = p_70056_1_;
        this.boatY = p_70056_3_;
        this.boatZ = p_70056_5_;
        this.boatYaw = (double)p_70056_7_;
        this.boatPitch = (double)p_70056_8_;
        this.motionX = this.velocityX;
        this.motionY = this.velocityY;
        this.motionZ = this.velocityZ;
    }

    /**
     * Sets the velocity to the args. Args: x, y, z
     */
    @SideOnly(Side.CLIENT)
    public void setVelocity(double p_70016_1_, double p_70016_3_, double p_70016_5_)
    {
        this.velocityX = this.motionX = p_70016_1_;
        this.velocityY = this.motionY = p_70016_3_;
        this.velocityZ = this.motionZ = p_70016_5_;
    }

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        super.onUpdate();
        this.setSize(3f, 2f);
        
        if (this.getTimeSinceHit() > 0)
        {
            this.setTimeSinceHit(this.getTimeSinceHit() - 1);
        }

        if (this.getDamageTaken() > 0.0F)
        {
            this.setDamageTaken(this.getDamageTaken() - 1.0F);
        }

        this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;
        byte b0 = 5;
        double d0 = 0.0D;

        double d10 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);
        double d2;
        double d4;
        int j;

        if (d10 > 0.26249999999999996D)
        {
            d2 = Math.cos((double)this.rotationYaw * Math.PI / 180.0D);
            d4 = Math.sin((double)this.rotationYaw * Math.PI / 180.0D);

            for (j = 0; (double)j < 1.0D + d10 * 60.0D; ++j)
            {
                double d5 = (double)(this.rand.nextFloat() * 2.0F - 1.0F);
                double d6 = (double)(this.rand.nextInt(2) * 2 - 1) * 0.7D;
                double d8;
                double d9;

                Block block = EntityUtil.findBlockUnderEntity(this);
                int meta = EntityUtil.findBlockDataUnderEntity(this);
                String particle = "blockcrack_" + Block.getIdFromBlock(block) + "_" + meta;
                
                if (this.rand.nextBoolean())
                {
                    d8 = this.posX - d2 * d5 * 0.8D + d4 * d6;
                    d9 = this.posZ - d4 * d5 * 0.8D - d2 * d6;
                    this.worldObj.spawnParticle(particle, d8, this.posY - 0.125D, d9, this.motionX, this.motionY, this.motionZ);
                }
                else
                {
                    d8 = this.posX + d2 + d4 * d5 * 0.7D;
                    d9 = this.posZ + d4 - d2 * d5 * 0.7D;
                    this.worldObj.spawnParticle(particle, d8, this.posY - 0.125D, d9, this.motionX, this.motionY, this.motionZ);
                }
            }
        }

        double d11;
        double d12;

        if (this.worldObj.isRemote && this.isBoatEmpty)
        {
            if (this.boatPosRotationIncrements > 0)
            {
                d2 = this.posX + (this.boatX - this.posX) / (double)this.boatPosRotationIncrements;
                d4 = this.posY + (this.boatY - this.posY) / (double)this.boatPosRotationIncrements;
                d11 = this.posZ + (this.boatZ - this.posZ) / (double)this.boatPosRotationIncrements;
                d12 = MathHelper.wrapAngleTo180_double(this.boatYaw - (double)this.rotationYaw);
                this.rotationYaw = (float)((double)this.rotationYaw + d12 / (double)this.boatPosRotationIncrements);
                this.rotationPitch = (float)((double)this.rotationPitch + (this.boatPitch - (double)this.rotationPitch) / (double)this.boatPosRotationIncrements);
                --this.boatPosRotationIncrements;
                this.setPosition(d2, d4, d11);
                this.setRotation(this.rotationYaw, this.rotationPitch);
            }
            else
            {
                d2 = this.posX + this.motionX;
                d4 = this.posY + this.motionY;
                d11 = this.posZ + this.motionZ;
                this.setPosition(d2, d4, d11);

                if (this.onGround)
                {
                    this.motionX *= 0.5D;
                    this.motionY *= 0.5D;
                    this.motionZ *= 0.5D;
                }

                this.motionX *= 0.9900000095367432D;
                this.motionY *= 0.949999988079071D;
                this.motionZ *= 0.9900000095367432D;
            }
        }
        else
        {
            if (d0 < 1.0D)
            {
                d2 = d0 * 2.0D - 1.0D;
                this.motionY += 0.03999999910593033D * d2;
            }
            else
            {
                if (this.motionY < 0.0D)
                {
                    this.motionY /= 2.0D;
                }

                this.motionY += 0.007000000216066837D;
            }

            if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityLivingBase)
            {
                EntityLivingBase entitylivingbase = (EntityLivingBase)this.riddenByEntity;
                float f = this.riddenByEntity.rotationYaw + -entitylivingbase.moveStrafing * 90.0F;
                this.motionX += -Math.sin((double)(f * (float)Math.PI / 180.0F)) * this.speedMultiplier * (double)entitylivingbase.moveForward * 0.05000000074505806D;
                this.motionZ += Math.cos((double)(f * (float)Math.PI / 180.0F)) * this.speedMultiplier * (double)entitylivingbase.moveForward * 0.05000000074505806D;
            }

            d2 = Math.sqrt(this.motionX * this.motionX + this.motionZ * this.motionZ);

            if (d2 > 0.35D)
            {
                d4 = 0.35D / d2;
                this.motionX *= d4;
                this.motionZ *= d4;
                d2 = 0.35D;
            }

            if (d2 > d10 && this.speedMultiplier < 0.35D)
            {
                this.speedMultiplier += (0.35D - this.speedMultiplier) / 35.0D;

                if (this.speedMultiplier > 0.35D)
                {
                    this.speedMultiplier = 0.35D;
                }
            }
            else
            {
                this.speedMultiplier -= (this.speedMultiplier - 0.07D) / 35.0D;

                if (this.speedMultiplier < 0.07D)
                {
                    this.speedMultiplier = 0.07D;
                }
            }

            int l;

            for (l = 0; l < 4; ++l)
            {
                int i1 = MathHelper.floor_double(this.posX + ((double)(l % 2) - 0.5D) * 0.8D);
                j = MathHelper.floor_double(this.posZ + ((double)(l / 2) - 0.5D) * 0.8D);

                for (int j1 = 0; j1 < 2; ++j1)
                {
                    int k = MathHelper.floor_double(this.posY) + j1;
                    Block block = this.worldObj.getBlock(i1, k, j);

                    if (block == Blocks.snow_layer)
                    {
                        this.worldObj.setBlockToAir(i1, k, j);
                        this.isCollidedHorizontally = false;
                    }
                    else if (block == Blocks.waterlily)
                    {
                        this.worldObj.func_147480_a(i1, k, j, true);
                        this.isCollidedHorizontally = false;
                    }
                }
            }

            if (this.onGround)
            {
                this.motionX *= 1D;
                this.motionY *= 1D;
                this.motionZ *= 1D;
            }

            this.moveEntity(this.motionX, this.motionY, this.motionZ);

            if (this.isCollidedHorizontally && d10 > 0.2D)
            {
            }
            else
            {
                this.motionX *= 0.9900000095367432D;
                this.motionY *= 0.949999988079071D;
                this.motionZ *= 0.9900000095367432D;
            }

            this.rotationPitch = 0.0F;
            d4 = (double)this.rotationYaw;
            d11 = this.prevPosX - this.posX;
            d12 = this.prevPosZ - this.posZ;

            if (d11 * d11 + d12 * d12 > 0.001D)
            {
                d4 = (double)((float)(Math.atan2(d12, d11) * 180.0D / Math.PI));
            }

            double d7 = MathHelper.wrapAngleTo180_double(d4 - (double)this.rotationYaw);

            if (d7 > 20.0D)
            {
                d7 = 20.0D;
            }

            if (d7 < -20.0D)
            {
                d7 = -20.0D;
            }

            this.rotationYaw = (float)((double)this.rotationYaw + d7);
            this.setRotation(this.rotationYaw, this.rotationPitch);

            if (!this.worldObj.isRemote)
            {
                List list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this, this.boundingBox.expand(0.20000000298023224D, 0.0D, 0.20000000298023224D));

                if (list != null && !list.isEmpty())
                {
                    for (int k1 = 0; k1 < list.size(); ++k1)
                    {
                        Entity entity = (Entity)list.get(k1);

                        if (entity != this.riddenByEntity && entity.canBePushed() && entity instanceof EntityJeep)
                        {
                            entity.applyEntityCollision(this);
                        }
                    }
                }

                if (this.riddenByEntity != null && this.riddenByEntity.isDead)
                {
                    this.riddenByEntity = null;
                }
            }
        }
    }

    public void updateRiderPosition()
    {
        if (this.riddenByEntity != null)
        {
            double d0 = Math.cos((double)this.rotationYaw * Math.PI / 180.0D) * 0.1D;
            double d1 = Math.sin((double)this.rotationYaw * Math.PI / 180.0D) * -0.6D;
            this.riddenByEntity.setPosition(this.posX + d0, this.posY + this.getMountedYOffset() + this.riddenByEntity.getYOffset(), this.posZ + d1);
        }
    }

    /**
     * (abstract) Protected helper method to write subclass entity data to NBT.
     */
    protected void writeEntityToNBT(NBTTagCompound p_70014_1_) {}

    /**
     * (abstract) Protected helper method to read subclass entity data from NBT.
     */
    protected void readEntityFromNBT(NBTTagCompound p_70037_1_) {}

    @SideOnly(Side.CLIENT)
    public float getShadowSize()
    {
        return 0.0F;
    }

    /**
     * First layer of player interaction
     */
    public boolean interactFirst(EntityPlayer p_130002_1_)
    {
        if (this.riddenByEntity != null && this.riddenByEntity instanceof EntityPlayer && this.riddenByEntity != p_130002_1_)
        {
            return true;
        }
        else
        {
            if (!this.worldObj.isRemote)
            {
                p_130002_1_.mountEntity(this);
            }

            return true;
        }
    }

    /**
     * Takes in the distance the entity has fallen this tick and whether its on the ground to update the fall distance
     * and deal fall damage if landing on the ground.  Args: distanceFallenThisTick, onGround
     */
    protected void updateFallState(double p_70064_1_, boolean p_70064_3_)
    {
        int i = MathHelper.floor_double(this.posX);
        int j = MathHelper.floor_double(this.posY);
        int k = MathHelper.floor_double(this.posZ);

        if (p_70064_3_)
        {
            if (this.fallDistance > 3.0F)
            {
                this.fall(this.fallDistance);

                if (!this.worldObj.isRemote && !this.isDead)
                {
                    this.setDead();
                    int l;

                    for (l = 0; l < 3; ++l)
                    {
                        this.func_145778_a(Item.getItemFromBlock(Blocks.planks), 1, 0.0F);
                    }

                    for (l = 0; l < 2; ++l)
                    {
                        this.func_145778_a(Items.stick, 1, 0.0F);
                    }
                }

                this.fallDistance = 0.0F;
            }
        }
        else if (this.worldObj.getBlock(i, j - 1, k).getMaterial() != Material.water && p_70064_1_ < 0.0D)
        {
            this.fallDistance = (float)((double)this.fallDistance - p_70064_1_);
        }
    }

    /**
     * Sets the damage taken from the last hit.
     */
    public void setDamageTaken(float p_70266_1_)
    {
        this.dataWatcher.updateObject(19, Float.valueOf(p_70266_1_));
    }

    /**
     * Gets the damage taken from the last hit.
     */
    public float getDamageTaken()
    {
        return this.dataWatcher.getWatchableObjectFloat(19);
    }

    /**
     * Sets the time to count down from since the last time entity was hit.
     */
    public void setTimeSinceHit(int p_70265_1_)
    {
        this.dataWatcher.updateObject(17, Integer.valueOf(p_70265_1_));
    }

    /**
     * Gets the time since the last hit.
     */
    public int getTimeSinceHit()
    {
        return this.dataWatcher.getWatchableObjectInt(17);
    }

    /**
     * Sets the forward direction of the entity.
     */
    public void setForwardDirection(int p_70269_1_)
    {
        this.dataWatcher.updateObject(18, Integer.valueOf(p_70269_1_));
    }

    /**
     * Gets the forward direction of the entity.
     */
    public int getForwardDirection()
    {
        return this.dataWatcher.getWatchableObjectInt(18);
    }

    /**
     * true if no player in boat
     */
    @SideOnly(Side.CLIENT)
    public void setIsBoatEmpty(boolean p_70270_1_)
    {
        this.isBoatEmpty = p_70270_1_;
    }
    
    @Override
public Entity[] getRiders() {

	return new Entity[] { this.riddenByEntity };

}

@Override
public boolean isRiderDriver(int index) {

	return this.riddenByEntity.isEntityEqual(getRiders()[index]);

}

@Override
public boolean isRiderGunner(int index) {

	return isRiderDriver(index);

}
    
}

 

Any help is greatly appreciated!

Thanks,

- Romejanic

[larsgerrits]

Set

this.stepHeight

to the amount of blocks the entity can hop. Eg, 1 means 1 block, 3 means 3 blocks and 0.5 mean a half a block (slabs)

[Romejanic]

Set

this.stepHeight

to the amount of blocks the entity can hop. Eg, 1 means 1 block, 3 means 3 blocks and 0.5 mean a half a block (slabs)

 

Thank you so much! Works perfectly! Been looking for a solution to this for ages

 

- Romejanic