How does i generate blocks on top of the surface world (like flowers)?

[Kander16]

Hello, I was wondering how i could generate some bushes on top of the surface.

Does anyone know what i need to do?

 

 

This is for spawning ores, but it will only spawn blocks in other blocks like 'MagneziumOre generate in the Stone' but i wanted to have like 'Strawberry plant generate on top of the grass block'.

 

http://pastebin.com/HhKmJ9ha

 

Thanks!

 

[Draco18s]

Using the ore generator is not the best method here.  You're better off picking an X and Z location inside a chunk and then finding the surface block and populating that way.

 

I use this function, which has a few extra bits, but does what you need.

 

/*Places a random collection of blocks (flowers) at a random distance from a given spot on the surface
* Paramters:
* x/y/z - location on the surface
* block and meta
* radius is the maximum distance away to spawn at
* num is how many blocks to attempt to place
* cluster radius is how close (or far) the blocks will be placed
*/
    public static void scatterFlowers(World world, int x, int y, int z, Block b, int meta, int radius, int num, int clusterRadius) {
    	Random r = new Random();
    	float[] u = RandomInUnitCircle(r); //find a location inside a unit circle, this value is multiplied by the radius.
    	int fails = 0;
    	int j, k, l;
    	while(num > 0 && fails < 20) {
    		j = x + r.nextInt(clusterRadius) - (clusterRadius/2) + Math.round(u[0]*radius); //random point inside the cluster radius, plus the offset for the large circle
    		k = y-5; //check up and down a few blocks
    		l = z + r.nextInt(clusterRadius) - (clusterRadius/2) + Math.round(u[1]*radius); //random point inside the cluster radius, plus the offset for the large circle
    		for(int f=0; f+k <= y+5; f++) {
			if(world.getBlock(j, f+k, l) == Blocks.grass && (world.getBlock(j, f+k+1, l) == Blocks.air || world.getBlock(j, f+k+1, l) == Blocks.tallgrass)) { //place above grass and replace tall grass
				world.setBlock(j, f+k+1, l, b, meta, 3);
				--num;
				k = 100;
			}
		}
    		++fails;
    	}
    }

    public static float[] RandomInUnitCircle(Random rn) {
    	float t = (float)Math.PI * (2*rn.nextFloat());
	float u = rn.nextFloat()+rn.nextFloat();
	float r = (u>1)?2-u:u;

    	return new float[] {r*(float)Math.cos(t), r*(float)Math.sin(t)};
    }

 

I call this function after I've found a point on the surface, e.g.:

 

//from an X/Y/Z location, go up until we find the surface
for(int j=1; y+j < 90; j++) {
	if(world.getBlock(x, y+j, z) == Blocks.grass) {
		MainMod.scatterFlowers(world, x, y+j+1, z, OresBase.blockOreFlowers, 0, 25, 8, 11);
		return;
	}
}