Hello guys. So for my mod I am making a wand of lightning. I need to find out which block the player is looking at and spawn a lightning bolt there. How would I go and do that? I've seen a good deal about raytracing. But how exactly would you do this?

Here is some code I have already got.

 

	 MovingObjectPosition objectMouseOver = world.rayTraceBlocks(300, 1);
         		//world.func_147447_a(vec3, addedVector, true, true, false);

        
         
         
         if (objectMouseOver != null && objectMouseOver.typeOfHit == MovingObjectType.BLOCK) {

            int i = objectMouseOver.blockX;
            
            int j = objectMouseOver.blockY;
            
            int k = objectMouseOver.blockZ;
            
            	world.spawnEntityInWorld(new EntityLightningBolt(world, i, j, k));
            	System.out.println(objectMouseOver.blockX);
            	System.out.println(objectMouseOver.blockY);
            	System.out.println(objectMouseOver.blockZ);

The raytrace command above doesn't work.

 

Take a look at the ray trace method used by tinkerers construct.

 

https://github.com/SlimeKnights/TinkersConstruct/blob/master/src/main/java/tconstruct/library/tools/AbilityHelper.java

 

I can not make any sense of his code.

What about it? The code or the trig?

I can not make any sense of his code.

 

Nether could i unfortunately im not very good with math but it works.

The code.

Also, I seem to have something working.

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

	if(!world.isRemote){
	 Vec3 look = player.getLookVec();
	 MovingObjectPosition Coord = player.rayTrace(300, 1);
	 if(Coord != null && Coord.typeOfHit == MovingObjectType.BLOCK){
	          EntityLightningBolt Lightning = new EntityLightningBolt(world, 1, 1, 1);
	          Lightning.setPosition(Coord.blockX,Coord.blockY,Coord.blockZ);
	          world.spawnEntityInWorld(Lightning);
	 }         
	 }

This works. Only, thing is lightning and fire is invisible. Should I spawn things in on if(world.isremote)?

 

Edit: I just realized I have a vec3 in there for no reason but that shouldnt matter.

You need to use world.addWeatherEffect(entity); not spawnEntityinWorld.

You need to use world.addWeatherEffect(entity); not spawnEntityinWorld.

Sorry, this didn't work either. Any other suggestions?

OHHH YEAH!!! :)

I got it working!!!!

I was actually updating this from 1.6.4 and it was working then. So this is what I did. I took my 1.6.4 code and replace the fuction

world.rayTraceBlocks_do_do

with

 world.rayTraceBlocks

 

So heres my final code if anyone wants it.

public ItemStack onItemRightClick(ItemStack itemstack, World world, EntityPlayer entityplayer)
    {
        float f = 1.0F;
        float f1 = entityplayer.prevRotationPitch + (entityplayer.rotationPitch - entityplayer.prevRotationPitch) * f;
        float f2 = entityplayer.prevRotationYaw + (entityplayer.rotationYaw - entityplayer.prevRotationYaw) * f;
        double d = entityplayer.prevPosX + (entityplayer.posX - entityplayer.prevPosX) * (double)f;
        double d1 = (entityplayer.prevPosY + (entityplayer.posY - entityplayer.prevPosY) * (double)f + 1.6200000000000001D) - (double)entityplayer.yOffset;
        double d2 = entityplayer.prevPosZ + (entityplayer.posZ - entityplayer.prevPosZ) * (double)f;
        Vec3 vec3d = Vec3.createVectorHelper(d, d1, d2);
        float f3 = MathHelper.cos(-f2 * 0.01745329F - 3.141593F);
        float f4 = MathHelper.sin(-f2 * 0.01745329F - 3.141593F);
        float f5 = -MathHelper.cos(-f1 * 0.01745329F);
        float f6 = MathHelper.sin(-f1 * 0.01745329F);
        float f7 = f4 * f5;
        float f8 = f6;
        float f9 = f3 * f5;
        double d3 = 5000D;
        Vec3 vec3d1 = vec3d.addVector((double)f7 * d3, (double)f8 * d3, (double)f9 * d3);
        MovingObjectPosition movingobjectposition = world.rayTraceBlocks_do_do(vec3d, vec3d1, false, true);
        if (movingobjectposition == null) 
        {
         return itemstack;
        }
        if (movingobjectposition.typeOfHit == EnumMovingObjectType.TILE) 
        {
         int i = movingobjectposition.blockX;
            int j = movingobjectposition.blockY;
            int k = movingobjectposition.blockZ;
            world.spawnEntityInWorld(new EntityLightningBolt(world, i, j, k));
        }
        return itemstack;
    }

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