[1.12.2] Drawing a smooth circle

[Meldexun]

I'm trying to draw a smooth circle on the screen with opengl. But the problem is that it isn't smooth. Is there a way to smooth the circle?

An image of the problem:

[Draco18s]

Ok, what do  you mean by "smooth"?

[Meldexun]

I think it's called antialiased. So the border of the cirlce should be more smooth.

[Draco18s]

  On 7/18/2019 at 4:48 PM, Meldexun said:

I think it's called antialiased. So the border of the cirlce should be more smooth.

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Ok, now I see what you mean. The "picture that's worth 1000 words" only works if there's an obvious problem or a freehand red circle around it.

 

Personally, I'd say screw it and not worry about it. Its minecraft, it has a blocky aesthetic. I'm not sure how to go about handling this.

[DavidM]

Please post your code.
There are many ways to draw circles in OpenGL. How are you drawing it?

 

 

  On 7/19/2019 at 12:15 AM, Draco18s said:

or a freehand red circle around it

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Damn. ???

[Meldexun]

Ok i now managed to draw the circles as i want. But i have a problem animating my gui.

I know that i have to work with partialTick to get a smooth animation. So as far as i know Minecraft.getMinecraft().getRenderPartialTicks() returns a float between 0 and 1.

For the animation i need an integer from the server (packet is sent every tick) and the PartialTick. The problem is that the PartialTick already returns a number close to 0 (but greater than 0. something like 0.2) but the integer is not synced already.

Maybe i can explain it better with an table:

Integer from Server:		Partial Tick:
		1240			0.18
		1250			0.44
		1250			0.68
		1250			0.94
		1250			0.18
		1260			0.44

When i work with these values it won't give me a smooth animation because the integer from the server is updated too late.

So is there anything i can do against this?

 

Capability:

  Reveal hidden contents

	protected void handleOxygen(EntityPlayer player) {
			//calculate oxygen
			
			BetterDiving.CONNECTION.sendTo(new SPacketSyncOxygen(currentAir), (EntityPlayerMP) player);
		}
	}

 

 

Message:

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public class SPacketSyncOxygen implements IMessage {
	
	private int air;
	
	public SPacketSyncOxygen() {
		
	}
	
	public SPacketSyncOxygen(int air) {
		this.air = air;
	}
	
	@Override
	public void fromBytes(ByteBuf buf) {
		this.air = buf.readInt();
	}

	@Override
	public void toBytes(ByteBuf buf) {
		buf.writeInt(air);
	}
	
	public int getAir() {
		return air;
	}
	
}

 

 

Message Handler:

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	@Override
	public IMessage onMessage(SPacketSyncOxygen message, MessageContext ctx) {
		FMLCommonHandler.instance().getWorldThread(ctx.netHandler).addScheduledTask(() -> {
			BetterDiving.proxy.handlePacketSyncOxygen(message, ctx);
		});
		return null;
	}

 

 

ClientProxy:

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	@Override
	public void handlePacketSyncOxygen(SPacketSyncOxygen message, MessageContext ctx) {
		ICapabilityDivingAttributes idiving = Minecraft.getMinecraft().player.getCapability(CapabilityDivingAttributesProvider.DIVING, null);
		((CapabilityDivingAttributes) idiving).previousAir = idiving.getCurrentAir();
		idiving.setCurrentAir(message.getAir());
	}

 

 

Edited July 25, 2019 by Meldexun

[Meldexun]

  On 7/25/2019 at 9:53 PM, diesieben07 said:

Is the value at all predictable? Like, does it go down in a regular interval? If so, please let the client predict things and only send a packet from the server every so often.

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I think it is predictable. It's a custom oxygen system so whenever you are in water it goes down and outside it goes up. So should i calculate the oxygen on both sides and only send a packet every second or so?

 

  On 7/25/2019 at 9:53 PM, diesieben07 said:

Also, for using partial ticks you need two values, the value from the previous tick and the current value. Then interpolate between the two based on the partial ticks value.

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I know that. You can look at my client proxy and see that i first save the last value and then write the new one.

Edited July 25, 2019 by Meldexun

[Meldexun]

  On 7/25/2019 at 10:01 PM, diesieben07 said:

Yes.

 

 

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Ok, thank you for the help.