Render techne models on Player

[Knux14]

Hello guy, its me again

 

I made a jetpack ingame which is in a slot in a IExtendedProperties which is working pretty well. Then my friend made me some models in Techne and i would like to make them showing on the player but i have no idea how to do it. I've read the Hats (from ichun) source code but i didn't understand everything. He make an entity to show the hat on the top of the head but its weird, doesn't it ? How can I render it properly ?

 

Thanks in advance

[hydroflame]

#RenderPlayerEvent

[Knux14]

ok thanks man, i'll test it.

 

So i exported my class in techne:

http://paste.minecraftforge.net/view/7e114b9c

And i made this in my EventHandler:

http://paste.minecraftforge.net/view/7a2cc7ea

 

But I dont know what I am supposed to write for the arguments of the render method. I search in the vanilla minecraft but I don't understand

[hydroflame]

probably cuz techne sucks

 

the argument you must send are the position and rotation of the model

[Knux14]

So I wrote this:

@ForgeSubscribe
public void renderPlayer (RenderPlayerEvent evt){
	EntityPlayer p = evt.entityPlayer;
	new ModelLaserJetpack().render(p, (float)p.posX, (float)p.posY, (float)p.posZ, 0.0F, 0.0F, 0.0F);
}

 

But it doesn't work I dont see any render at all

It seems that the renderPlayer event does not work because i tried to do a System.out.println("TEST") and nothing show up

Here's how the class is registred in the main class:

		MinecraftForge.EVENT_BUS.register(new EntityEventHandler());

[hydroflame]

oh, forgot, you cant handle event of type RenderPlayer directly, its either

RenderPlayerEvent.pre or RenderPlayerEvent.post

 

and it wont be the location of the player but the difference betweent the local player and the target player

[Knux14]

So now, the prints work but the render dont show either with .Post or .Pre

@ForgeSubscribe
public void renderPlayer (RenderPlayerEvent.Post evt){
	EntityCustomPlayer pl = (EntityCustomPlayer) evt.entityPlayer.getExtendedProperties("JetpackJoycraft Custom Player");
	System.out.println("TEST");
	//if (pl.gadgets[0].getItem() == Items.jetpack){
	//if (pl.gadgets[0].getItemDamage() == 11)
	//	{
			EntityPlayer p = evt.entityPlayer;
			EntityPlayer mcPl = Minecraft.getMinecraft().thePlayer;

			new ModelLaserJetpack().render(p, getDist(p.posX, mcPl.posX), getDist(p.posY, mcPl.posY), getDist(p.posX, mcPl.posY), 0.0F, 0.0F, 0.0F);
	//	}
	//}
}

public float getDist(double a, double b){
	if (a > b)
		return (float)(a - b);
	else if (b > a)
		return (float)(b - a);
	else
		return 0.0F;
}

[Knux14]

Bump

[Knux14]

Ok so the last param was the size, so 0 was .... A bit too small x)

Now I need to make it turn with the player

[Mew]

GL11 boy, GL11... I even don't know all the fascinating tid bits that come with it So don't ask me too much about it. I do know that you could, in theory, get the players rotation, and then rotate the model by the same rotation.

 

So, basically something like:

 

int someRandomIntThatHoldsPlayerRotationX = someRandomGetterMethodThatReturnsTheValueNeeded();
int someRandomIntThatHoldsPlayerRotationY = someRandomGetterMethodThatReturnsTheValueNeeded();
int someRandomIntThatHoldsPlayerRotationZ = someRandomGetterMethodThatReturnsTheValueNeeded();

GL11.glRotate(someRandomIntThatHoldsPlayerRotationX, someRandomIntThatHoldsPlayerRotationY, someRandomIntThatHoldsPlayerRotationZ);

[Knux14]

Thanks man, so I can't use GL11.glRotate (Function does not exists) and there is glRotatef.

I tried it but i cant get a correct value for the params. The player have two vars which are called rotationYaw and rotationPitch but I dont understand how they really works. I'm trying with these

[Naiten]

Actually, glRotate takes not 3 arguments, but 4: an angle and coordinates of the rotating vector.

So, glRotatef(player.RotationYaw, 0, 1, 0) will rotate renderer around vertical axis, as an instance.

[hydroflame]

nait is right, the whole is called a quaternion and gives me headache at night.

also every transformation function in opengl start with "gl" followed by the kind of transformation ("translate", "scale", "rotate" ) and ends with a letter saying which type of argument they take. i for int, d for double, f for float

so effectivelly the function "glRotate" doesnt exists but "glRotatef" does and with certain language+api "glRotated" exists too (but it doesnt with java+LWJGL)

[Knux14]

yes it does

	public static void glRotated(double angle, double x, double y, double z) {
	ContextCapabilities caps = GLContext.getCapabilities();
	long function_pointer = caps.glRotated;
	BufferChecks.checkFunctionAddress(function_pointer);
	nglRotated(angle, x, y, z, function_pointer);
}

 

I've got something witch will work soon

So my jetpack render next to the head of the player. I'll try a glTranslate

 

Ok it works. Now, the last thing I need is to make it visible for the other players in SMP. How am I supposed to do that?

[hydroflame]

ah ok did t know rotated was i  lwjgl

 

anyway from a technical point of view the vast majority of graphic cards have only 32bit precision aaaanyway so might as well directly use float and not double