Regarding custom HUD elements (replacing vanilla)

[Zer0HD2]

I'm currently working on a mod which will eventually modify a player's maximum health depending on a level, and replace the default GUI element with a custom health bar. I currently have the following working;

 

- Vanilla health bar no longer renders

- My custom health bar is rendering (in the center of the screen, this is one of my questions)

- My custom health bar is displaying the correct amount of health ((current health / max health) * bar width)

 

However, I have a few problems/questions:

 

Firstly, the hunger bar no longer renders. This is not a huge issue, as I can just make it render manually, but I'd rather not cancel that particular part of the RenderGameOverlayEvent. Is there any way to only cancel the rendering of the health bar, not the hunger bar?

 

Second, how would I go about finding the X and Y coords of the top-left corner of the VANILLA health (and hunger) bar? As in, the location on the screen where it will render. I currently am using event.resolution.getScaledHeight() / 2 (and width for the x position) to get the center of the screen, but thanks to the helpful variable naming in Minecraft's code, I haven't been able to figure out how they get the position on the screen.

 

Lastly, how exactly would I go about updating the player's maximum health, and do I need to store this in their extended properties (and use packets to sync between client and server)? I already have extended properties set up for the levelling system, and can grab the user's properties (level, exp, etc) at any time.

 

Thanks,

 

Zer0

[Zer0HD2]

Update: I've figured out the positioning thing. X position from center, Y position from bottom.

[Kwibble]

When you are drawing something, the point (0,0) is the top left corner. If you were having your health bar drawn in the middle, then it must have been drawing at width / 2 and height / 2

[Zer0HD2]

  On 6/20/2014 at 12:33 AM, Kwibble said:

When you are drawing something, the point (0,0) is the top left corner. If you were having your health bar drawn in the middle, then it must have been drawing at width / 2 and height / 2

 

That is precisely what I said in my first post. I had it there for testing. I've got the positioning sorted now, anyway.

[Kwibble]

You never said that. I was just pointing out what I hadn't read in your post.

 

All crap aside, here is what you want for one of your questions:

@SubscribeEvent
public void on(RenderGameOverlayEvent.PRE event)
{
        if (event.type.equals(RenderGameOverlayEvent.ElementType.HEALTH)
        {
                event.setCanceled(true); // Cancels the rendering of the HEALTH bar. Take a look at all the different ElementType's
        }
}

[Zer0HD2]

Thanks, but my problem is not cancelling the rendering of the health bar - it's stopping that from cancelling the rendering of the hunger bar. Right now if I stop the health bar from rendering, the hunger bar doesn't render either. I would prefer to implement a custom hunger bar, but I've been unable to get it to display the correct value. What I wanted to know was how to stop the event from cancelling when it renders the hunger bar.

[Kwibble]

>.> I said look into the element types didn't I? Yes? Change HEALTH to FOOD and it will only cancel the food bar. Use HEALTH and it will only cancel the health bar.

[Zer0HD2]

I am fully aware of that. What I am asking is how to NOT cancel the food bar when you cancel the health bar. I have tried setting canceled to false when the event.type is FOOD, but the food bar is still not rendered.

[Kwibble]

Okay. First, I apologize for want to punch your face in. I get exasperated easily.

 

Secondly. If you use this code:

@SubscribeEvent
public void on(RenderGameOverlayEvent.PRE event)
{
        if (event.type.equals(RenderGameOverlayEvent.ElementType.HEALTH)
        {
                event.setCanceled(true); // Cancels the rendering of the HEALTH bar. Take a look at all the different ElementType's
        }
}

 

Only the health bar should be canceled, not the food bar. That is what you were asking, no?

[Zer0HD2]

Ah, I did not use the .PRE event. That would be why it was cancelling everything rendered after the health bar. Thanks, I'll give that a try.

 

EDIT: Nope. Still cancels the rendering of everything after the health bar: https://www.dropbox.com/s/r4324mcvd8n2mgw/javaw%202014-06-20%2021-48-19-069.png

[Zer0HD2]

@SideOnly(Side.CLIENT)
public class GuiHealthBar extends Gui 
{
private Minecraft mc;
private static final ResourceLocation texLoc = new ResourceLocation("mchardcore", "textures/gui/health_bar.png");

public GuiHealthBar(Minecraft mc)
{
	super();
	this.mc = mc;
}

@SubscribeEvent
public void onRenderHealthBar(RenderGameOverlayEvent.Pre event)
{
	if(event.type == ElementType.HEALTH)
	{
		event.setCanceled(true);

		EntityPlayer player = this.mc.thePlayer;

		float health = player.getHealth();
		float maxHealth = player.getMaxHealth();

		int healthBarWidth = (int)(((float)health/maxHealth)*79);

		int xPos = event.resolution.getScaledWidth() / 2 - 91;
		int yPos = event.resolution.getScaledHeight() - 40;

		GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
		GL11.glDisable(GL11.GL_LIGHTING);

		this.mc.getTextureManager().bindTexture(texLoc);

		this.drawTexturedModalRect(xPos, yPos, 0, 0, 81, 9);
		this.drawTexturedModalRect(xPos+1, yPos+1, 0, 9, healthBarWidth, 7);

	}
}
}

[Kwibble]

Read the if statement that I gave you. How is it different to yours?

[larsgerrits]

Try putting a else statement after the if statement which does event.setCanceled(false); so it de-cancels the rendering if it isn't the health bar.

[Zer0HD2]

Yep, I tried adding an else statement - still cancels the rendering of everything after the health bar.

 

Kwibble: I did try changing it to the if statement you provided, but it made no difference, so I changed it back to that purely because it's easier to read.

[Zer0HD2]

So I decided that rather than trying to get the default hunger bar to render, I would create a new HUD instead (seems weird that this was actually easier than getting the default elements to render). However, I now have a new fun little bug. Where the old health and hunger bars would have been, I now have weird green shapes that look like they would have been the outlines for the default bars.

 

 

They are coloured green because I set the colour of the string (number in the HUD) to green, as when I change that colour, the colour of the phantom health bar changes too. Therefore, it must be rendering after the event I have cancelled, as the string is the last thing I render to prevent it from turning the armour and air bars green (the grey one is my new armour bar, turns out that got cancelled too).

 

Here is the code for the GUI class: http://pastebin.com/D2jrErz8

 

Does anyone know why this happens or how to fix it?

[Zer0HD2]

That reset the colour, but the phantom health bar just appears white now.

[Zer0HD2]

Yeah, I removed the .Pre to see if that solved the issue and forgot to put it back. Made no difference.

[Zer0HD2]

Nevermind, I just solved it, although it's a pretty messy method that I'll change if I find a better way of doing it. I just set glColor4f(1, 1, 1, 0), so it's transparent. Works for now.