Custom minecart track

[thecodewarrior]

Is there any way to add custom minecart tracks that behave identically to the vanilla tracks without having to re-implement the minecart logic in some event handler somewhere? I looked at the minecart code and it's all using == checks and not instanceof, so I can't just inherit from the track I want to mimic.

 

I'm trying to make tracks that don't need a supporting block by inheriting from BlockRailBase, but the tracks stop the minecart almost immediately after it goes onto them, and the player can only inch forward when in the minecart. I even set the max speed to 1.0 (20 blocks/sec) and it didn't help, it's as if the minecart thinks it's on the ground, not a track.

 

I can post code if you need it, but it's pretty uneventful, just inherit from BlockRailBase, canPlace returns true, and some special right-click logic.

[Draco18s]

What version of Minecraft? I've successfully extended the rails class in 1.7.10 just fine.

 

http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2379886-micromod-rail-bridges

[thecodewarrior]

1.7.10, did you get booster tracks to work too?

[Draco18s]

1.7.10, did you get booster tracks to work too?

 

I never looked into those, actually.

[thecodewarrior]

So, I figured out how to do it:

 

Normal tracks: (extends BlockRail)

- Nothing special, just extend and you're good to go.

 

 

Detector track: (extends BlockRailDetector)

- Nothing special, just extend and you're good to go.

 

 

Booster tracks: (extends BlockRailPowered)

- Add this method, it'll deal with the boosting stuff (this is stolen from the bottom of EntityMinecart#func_145821_a)

public void onMinecartPass(World world, EntityMinecart cart, int x, int y, int z) {
        	int railMeta = this.getBasicRailMetadata(world, cart, x, y, z);
        	int meta = world.getBlockMetadata(x,y,z);
	double d15 = Math.sqrt(cart.motionX * cart.motionX + cart.motionZ * cart.motionZ);

	if( (meta &  == 0)
		return;

	if (d15 > 0.01D)
	{
		double d16 = 0.06D;
		cart.motionX += cart.motionX / d15 * d16;
		cart.motionZ += cart.motionZ / d15 * d16;
	}
	else if (railMeta == 1)
	{
		if (cart.worldObj.getBlock(x - 1, y, z).isNormalCube())
		{
			cart.motionX = 0.02D;
		}
		else if (cart.worldObj.getBlock(x + 1, y, z).isNormalCube())
		{
			cart.motionX = -0.02D;
		}
		}
	else if (railMeta == 0)
	{
		if (cart.worldObj.getBlock(x, y, z - 1).isNormalCube())
		{
			cart.motionZ = 0.02D;
		}
		else if (cart.worldObj.getBlock(x, y, z + 1).isNormalCube())
		{
			cart.motionZ = -0.02D;
		}
	}
}

 

 

Activator tracks: (extends BlockRail)

- Add this method, it'll activate any passing minecarts when active

public void onMinecartPass(World world, EntityMinecart cart, int x, int y, int z) {
	int meta = world.getBlockMetadata(x, y, z);
	boolean active = (meta &  != 0; // use 0x8 bit of metadata to control track
	// boolean active = world.isBlockIndirectlyGettingPowered(x, y, z); // use redstone to control track
	cart.onActivatorRailPass(x, y, z, active);
}

- Add these methods, they'll deal with making it not turn like a normal track

public boolean isPowered() {
	return true;
}
public boolean isFlexibleRail(IBlockAccess world, int y, int x, int z) {
	return false;
}