[1.6.4]Creating Particles

[CodeLover]

Hi everyone

 

I am fairly new to modding but know java pretty well. I have been practising basic skills e.g. Creating blocks, Custom Renders, Items, Gui's etc but then i came across particle fx. Ive had a scratch about the mine craft code and made some basic particles.

 

recently i found this video of a mod and decided i wanted to do something similar to it. The video:

 

How would i go about creating Similar like this in which the particle is "projected out" as such and follows the wall line?

 

Thanks if anyone could help me.

[CodeLover]

Has anyone done this before? I have a basic particle(copied large smoke) but now i want it so it will float from the walls in the room. The mod i am aiming to design is a mod that adds "ghost" effects using a single block. That block has a gui(completed) that has different selections. I would like it if that block could have particles coming from it and whizzing around the walls similar to the one in the video i posted.

[jabelar]

I think you need to override the constructor and the onUpdate() method in the EntityFX class for your particle.  That is, I believe, where the motions are intialized and ujpdated.

[CodeLover]

I thought i would need to override it and add my own but i don't know how i would Implement the movement and i don't know how it would spawn on the walls

[jabelar]

  On 6/4/2014 at 7:19 AM, CodeLover said:

I thought i would need to override it and add my own but i don't know how i would Implement the movement and i don't know how it would spawn on the walls

 

If you look at the constructor it sets the initial motion and the life of the particles and then the onUpdate() updates the position.  So you would put in what you want -- do you want them to start out in specific directions, move fast or slow, move randomly, move straight or in circles, etc.

 

And to spawn on the walls you just need to set their initial position to be where the wall is.  Whether or not the wall is easy to detect would depend on whether the size and shape of the room is already expected to be a certain way or whether you want your particles to be smart enough to go around any shape and size of room.

 

However, I looked at that video you posted again and it is possible that they did not use particles.  They may just be doing some sort of render effect.

 

Anyway, I think it would be possible for the disco ball in that example to have a TileEntity associated which is controlling the effect.  In fact, if you keep track of the particles that are created, the TileEntity itself should be able to update the position.

[CodeLover]

  On 6/4/2014 at 10:23 PM, jabelar said:

  Quote

I thought i would need to override it and add my own but i don't know how i would Implement the movement and i don't know how it would spawn on the walls

 

If you look at the constructor it sets the initial motion and the life of the particles and then the onUpdate() updates the position.  So you would put in what you want -- do you want them to start out in specific directions, move fast or slow, move randomly, move straight or in circles, etc.

 

And to spawn on the walls you just need to set their initial position to be where the wall is.  Whether or not the wall is easy to detect would depend on whether the size and shape of the room is already expected to be a certain way or whether you want your particles to be smart enough to go around any shape and size of room.

 

However, I looked at that video you posted again and it is possible that they did not use particles.  They may just be doing some sort of render effect.

 

Anyway, I think it would be possible for the disco ball in that example to have a TileEntity associated which is controlling the effect.  In fact, if you keep track of the particles that are created, the TileEntity itself should be able to update the position.

 

I downloaded this mod to play with some mates and found that the classes to do with the Block are as followed:

BlockClass

and a TileEntityBlockClass

(I can't quite remember what they were named)

 

How would i achieve a similar effect with the tile entity because i have never seen anything like this before.

 

EDIT: I have opened the class file to try and see what is going on. This is it:

package maaatin.disco;

import abw;
import asp;
import asx;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import java.util.Random;

public class TileEntityDiscoBall extends asp
{
  public int lightsPerRow;
  public int height;
  public int resolution;
  public double[][][] possibleLightCoords;
  public int[][] orientations;
  public double[][][] allLightXCoordinates;
  public double[][][] allLightYCoordinates;
  public double[][][] allLightZCoordinates;
  public int[][][] allOrientations;
  public int lightRange;
  public double angle;
  public boolean initialized;
  public int[][] rand;
  public int counter;
  public double orientationAngle;
  public int speed;

  public TileEntityDiscoBall()
  {
    this.lightsPerRow = 16;
    this.height = 9;
    this.resolution = 300;

    this.possibleLightCoords = new double[3][this.resolution][this.height];
    this.orientations = new int[this.resolution][this.height];

    this.allLightXCoordinates = new double[this.lightsPerRow][this.height][this.resolution];
    this.allLightYCoordinates = new double[this.lightsPerRow][this.height][this.resolution];
    this.allLightZCoordinates = new double[this.lightsPerRow][this.height][this.resolution];
    this.allOrientations = new int[this.lightsPerRow][this.height][this.resolution];

    this.lightRange = 16;
    this.angle = 0.0D;

    this.initialized = false;

    this.rand = new int[60][60];

    this.speed = 100;
  }

  public void h()
  {
    if (!this.initialized)
    {
      initialize();
    }
  }

  @SideOnly(Side.CLIENT)
  public asx getRenderBoundingBox()
  {
    return INFINITE_EXTENT_AABB;
  }

  public void initialize()
  {
    boolean stopLoop = false;
    for (int h = 1; h < this.height; h++)
    {
      if ((!this.k.c(this.l, this.m - h, this.n)) && (!stopLoop))
      {
        this.height = h;
        stopLoop = true;
      }
    }

    for (int h = 0; h < this.height; h++)
    {
      for (int i = 0; i < this.lightsPerRow; i++)
      {
        this.rand[i][h] = this.k.s.nextInt(this.resolution / 10);
      }

    }

    for (int h = 0; h < this.height; h++)
    {
      this.counter = (this.resolution - 1);
      this.angle = 0.0D;
      for (int i = this.resolution - 1; i >= 0; i--)
      {
        getCoords(this.l + 0.5D, this.m + 0.5D - h, this.n + 0.5D, this.k, this.angle, h);
        this.angle += 3.141592653589793D / (this.resolution / 2.0D);
        this.counter -= 1;
      }
    }

    for (int h = 0; h < this.height; h++)
    {
      for (int i = 0; i < this.lightsPerRow; i++)
      {
        for (int j = 0; j < this.resolution; j++)
        {
          this.allLightXCoordinates[i][h][j] = this.possibleLightCoords[0][((j + (this.rand[i][h] + this.resolution * i / this.lightsPerRow)) % this.resolution)][h];
          this.allLightYCoordinates[i][h][j] = this.possibleLightCoords[1][((j + (this.rand[i][h] + this.resolution * i / this.lightsPerRow)) % this.resolution)][h];
          this.allLightZCoordinates[i][h][j] = this.possibleLightCoords[2][((j + (this.rand[i][h] + this.resolution * i / this.lightsPerRow)) % this.resolution)][h];

          this.allOrientations[i][h][j] = this.orientations[((j + (this.rand[i][h] + this.resolution * i / this.lightsPerRow)) % this.resolution)][h];
        }
      }
    }

    this.initialized = true;
  }

  public void getCoords(double x, double y, double z, abw world, double angle, int h)
  {
    boolean coordinateFilled = false;

    for (int i = 1; i < this.lightRange; i++)
    {
      if ((!coordinateFilled) && (!world.c(truncateDoubleToInt(x + i * Math.cos(angle)), (int)y, truncateDoubleToInt(z + i * Math.sin(angle)))))
      {
        if (world.c(truncateDoubleToInt(x + (i - 0.1D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.1D) * Math.sin(angle))))
        {
          fillCoords(0.1D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.2D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.2D) * Math.sin(angle))))
        {
          fillCoords(0.2D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.3D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.3D) * Math.sin(angle))))
        {
          fillCoords(0.3D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.4D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.4D) * Math.sin(angle))))
        {
          fillCoords(0.4D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.5D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.5D) * Math.sin(angle))))
        {
          fillCoords(0.5D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.6D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.6D) * Math.sin(angle))))
        {
          fillCoords(0.6D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.7D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.7D) * Math.sin(angle))))
        {
          fillCoords(0.7D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.8D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.8D) * Math.sin(angle))))
        {
          fillCoords(0.8D, x, y, z, i, h);
        }
        else if (world.c(truncateDoubleToInt(x + (i - 0.9D) * Math.cos(angle)), (int)y, truncateDoubleToInt(z + (i - 0.9D) * Math.sin(angle))))
        {
          fillCoords(0.9D, x, y, z, i, h);
        }
        else
        {
          fillCoords(1.0D, x, y, z, i, h);
        }

        coordinateFilled = true;
      }
    }
  }

  public void fillCoords(double j, double x, double y, double z, int i, int h)
  {
    this.possibleLightCoords[0][this.counter][h] = (x + (i - j) * Math.cos(this.angle));
    this.possibleLightCoords[1][this.counter][h] = y;
    this.possibleLightCoords[2][this.counter][h] = (z + (i - j) * Math.sin(this.angle));

    this.orientations[this.counter][h] = getOrientation(this.possibleLightCoords[0][this.counter][h], this.possibleLightCoords[1][this.counter][h], this.possibleLightCoords[2][this.counter][h]);
  }

  public int getOrientation(double x, double y, double z)
  {
    this.orientationAngle = 0.0D;

    for (int i = 0; i < 4; i++)
    {
      double j = 0.2D;

      if (!this.k.c(truncateDoubleToInt(x + j * Math.cos(this.orientationAngle)), truncateDoubleToInt(y), truncateDoubleToInt(z + j * Math.sin(this.orientationAngle))))
      {
        return i;
      }

      this.orientationAngle += 1.570796326794897D;
    }

    return 0;
  }

  public static int truncateDoubleToInt(double par0)
  {
    return (int)(par0 + 1024.0D) - 1024;
  }
}

 

Now i this abw is World. asp is TileEntity and asx is maybe Block.

I cannot see how this is working just due to the lack of methods actually listed.

 

 

[delpi]

Look up examples of EntityFX tutorials.

 

The EntityFX will be your custom particle.  It will only reside on the client.

 

What I have done is create a packet class, where my server can say where to generate a particle.  You specifcy a name, location, motion.  I suggest only sending the particle to the world of interest.  You could try area around, but I stuck with world.

 

On the client side, it takes that and if the name is for one of my customFX particles, it generates it for the clients.  If it is a minecraft basic, it generates it as well.

 

 

This has served me well in my mods.

 

 

[jabelar]

The disco ball is a TileEntity which is just fancy way of saying a block that executes logic.  All that codes seems to obviously be calculating the positions of the little lights.  I suppose that those could positions could be used to control particles but it isn't clear since there is no mention of particles in the code you showed.  It could still be some sort of render effect.

 

Anyway, let's go back to what you want to do -- make some ghostly smoke come from some blocks.  The main point is that you should have a TileEntity somewhere (I assume that would be your custom block you mentioned that already has a guy) that searches for the blocks you care about (the walls) and then creates the effect with your particles. 

 

There are probably several ways to do this, but basically your TileEntity just needs to do a "search" around itself to find where the blocks that form the walls are, and then you just control the particle position according to what you find.

[delpi]

If he just wants smoke particles out of block, that could be done without a tilentity.

[CodeLover]

I have been trying for a while now to get a similar effect but with just white squares or grey squares and i couldn't figure it out. Could someone pls run me through this?