I am wanting to make a bar like the vanilla experience bar but with my own values. I want the bar to have the two textures like the experience bar (the empty and full textures) and display the increments of "experience" shown when it gets to the right amount (what I mean is that the bar fills up with a little bit of the full texture being shown on the screen).

I know this will involve a tick handler, but I am not entirely sure how to go about it... So any help will be appreciated.

Having built my own HP bar recently, you'll need a few things.

 

1) empty bar

2) full bar (you can use the same png and sprite-sheet it)

3) Event Handler

4) Packet Handler

5) Gui script

 

Your event handler you can register like any other, but the event you'll be interested in is the

 

public void EntityUpdate(LivingEvent event){ }

 

Check for if(event.entityLiving instanceof EntityPlayer) and store your data in the player NBT.  There are two ways to go about it, I use ent.getEntityData() but there's also IExtendedProperties.

 

When the value changes, send a new packet to the player, packet handler intercepts, passes the value to the gui script, the gui script then does the drawing:

 

GuiIngame gui = this.mc.ingameGUI;
GL11.glBindTexture(GL11.GL_TEXTURE_2D, this.mc.renderEngine.getTexture("/mods/DecayingWorld/textures/gui/gui.png"));  //I stored my texture along with my other textures
int u = [current exp] / [max exp];  //remember to use floating point division and finish with an integer
gui.drawTexturedModalRect(122, 209, 0, 0, w, h);  //w here is the width we need from the empty bar, in pixels, h is the height
gui.drawTexturedModalRect(122, 209, 0, h, u, h);  //u here is the width from the full bar
//122, 209 are approximate locations of the exp bar at the default window size.  I haven't done any gui scaling yet
//0,0 and 0,h assume the upper left corner of your png and height of your bar (full stacked under the empty one with 0 pixel spacing)

Yes, I could get that much done, I just don't get how it draws the full bar onto the empty one

 

SO if that could be explained in the code you posted???

Yes, I could get that much done, I just don't get how it draws the full bar onto the empty one

 

SO if that could be explained in the code you posted???

 

Two draw calls:

 

gui.drawTexturedModalRect(122, 209, 0, 0, full_width, h);
gui.drawTexturedModalRect(122, 209, 0, h, width_of_partial_fill, h);