Render Item with alpha channel

[daafganggdg]

Hey,

How can i render an item with an alpha channel when the player is holding it, like glass pane? (not with 100% transparency).

I already have a texture and its working in the inventory but looks super weird when the player is holding it

[superninjaman45]

Code pls.

[daafganggdg]

  On 10/25/2014 at 5:05 PM, superninjaman45 said:

Code pls.

?

I dont have no code, thats why i am asking

[TheGreyGhost]

  On 10/25/2014 at 6:08 PM, daafganggdg said:

  Quote

Code pls.

?

I dont have no code, thats why i am asking

I think he means

>I already have a texture and its working in the inventory but looks super weird when the player is holding it

 

You're saying it looks fine in the inventory (transparent?) but not  when the player is holding it.  So you obviously have some code already and perhaps some screenshots?

I'm not sure whether you want an item like glass (which is either fully opaque or fully transparent) or whether you want something like the ice block (which is partially transparent and uses alpha blending).  Both fully transparent and partially transparent use alpha channels.

 

 

This link might help understand item rendering

http://greyminecraftcoder.blogspot.com.au/2013/08/rendering-items.html

 

This link for transparency (with blocks)

http://greyminecraftcoder.blogspot.com.au/2013/07/rendering-transparent-blocks.html

 

You can achieve what you want using an IItemRenderer with the following code in it

 

      GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
// render here
      GL11.glPopAttrib();

 

Useful background info here

http://www.glprogramming.com/red/chapter06.html

 

-TGG

 

 

 

 

[daafganggdg]

So just to clarify,

When you hold for example the green stained glass plane in hand in 1st person its semi transparent (it still has a coulour but you can see through), Thats what i want my item to look like. Right now my items pixels either are 100% transparent and you just cant see them or 0%.

I just realized that when holding the green stained glass plane in 3rd person it looks as weird as my item with either 100% or 0% transparency

[daafganggdg]

  On 10/26/2014 at 12:03 AM, TheGreyGhost said:

You're saying it looks fine in the inventory (transparent?) but not  when the player is holding it.  So you obviously have some code already and perhaps some screenshots?

I'm not sure whether you want an item like glass (which is either fully opaque or fully transparent) or whether you want something like the ice block (which is partially transparent and uses alpha blending).  Both fully transparent and partially transparent use alpha channels.

 

 

This link might help understand item rendering

http://greyminecraftcoder.blogspot.com.au/2013/08/rendering-items.html

 

This link for transparency (with blocks)

http://greyminecraftcoder.blogspot.com.au/2013/07/rendering-transparent-blocks.html

 

You can achieve what you want using an IItemRenderer with the following code in it

 

      GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
// render here
      GL11.glPopAttrib();

 

Useful background info here

http://www.glprogramming.com/red/chapter06.html

 

-TGG

I found the method

    public int getRenderBlockPass(){
    	return 1;
    }

in 1 of your post, so that makes blocks semi trasparent but just like ice it still has 0% transparency when the player is holding it.. and finally I have an Item not a block

 

So you said I have to use an IItemRenderer for that, how would I go on using one?

[daafganggdg]

Ok I think I kind of got it done,

      GL11.glPushAttrib(GL11.GL_ENABLE_BIT);
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
// render here
      GL11.glPopAttrib();

that made it look transparent, however I now got a bigger problem

And big is just the keyword, its about 100 times as big as a normal item, not in the right rotation nor at the right place, how do I fix that?