I have a custom rendered block. I have this code

 

GL11.glPushMatrix();

		stack = new ItemStack(Blocks.diamond_block);
		this.entItem.hoverStart = 0.0F;
		RenderItem.renderInFrame = true;
		GL11.glTranslatef((float)x + 0.5F, (float)y + 1.02F, (float)z + 0.3F);
		GL11.glRotatef(180, 0, 1, 1);

		RenderManager.instance.renderEntityWithPosYaw(this.entItem, 0.0D, 0.0D, 0.01D, 0.0F, 0.0F);
		RenderItem.renderInFrame = false;
		GL11.glPopMatrix();

 

Which renderers a diamond block on my custom rendered block. I want the diamond block to move up one pixels every 20 ticks to give it a smooth floating animation. How would I do it?

You can change the y value in glTranslate to move the Item.

 

Yea, I know that, but how would I change it every 10 ticks?

You have a TileEntity, right? In there make a field that you change every 10 ticks and then access from the renderer. Make sure to do this on the client.

 

Ok, so i've got that working. Now I only want it to start floating up when I right click on a block. How do I do that?

"On a Block"? Any Block? Or the Block that renders the Item?

 

The diamond block that I render on my item