Rendering from a Point - Odd Issue

[Draco18s]

Code is a bit messy, but essentially I'm waiting for an event, then calling readyTickHandler().  It waits a specified number of ticks (renderDelay) before performing the render.  This is to allow time for the world to load.

 

However, due to the delay, I do not want to render from the player's location after the delay, but rather from their original location and orientation.

 

Here's the problem:

Even though I'm setting the temporary entity's orientation, it's being ignored when the render happens, it's treated as always 0, regardless of its actual value.  If I use the actual player as the temporary agent, then it gets rendered with the correct orientation values (that is, where the player is looking at the time).

 

What do I need to change in order for the temporary entity to make it render correctly?

 

public void readyTickHandler(World w, EntityPlayer pl) {
	world = w;
	p = new EntityRenderNode(world);
	world.spawnEntityInWorld(p);
	p.posX = pl.posX;
	p.posY = pl.posY;
	p.posZ = pl.posZ;
	p.rotationPitch = 0;
	p.rotationYaw = pl.rotationYaw;
	System.out.println("Yaw: " + pl.rotationYaw);
	renderDelay = 20*30;
}

@Override
public void tickEnd(EnumSet<TickType> type, Object... tickData) {
	if(renderDelay > 0) {
		renderDelay--;
	}
	if(renderDelay == 0) {
		renderDelay = -1;
		System.out.println("Render Yaw: " + p.rotationYaw);

		//this is the function that handles the rendering.
		int[] data = renderWorldToTexture(p, 0.01F);
		//now we save the data.
    		ByteArrayOutputStream bt = new ByteArrayOutputStream();
		DataOutputStream out = new DataOutputStream(bt);
		try
		{
			//omitted for irrelevancy.
		}
		catch (IOException ex)
		{
		}
		//remove the temporary entity
		p.attackEntityFrom(DamageSource.outOfWorld,	100);
	}
}

private final int[] renderWorldToTexture(EntityLivingBase player, float renderTime) {
        GameSettings settings = mc.gameSettings; // dont want to access these fields every time
        EntityRenderer entityRenderer = mc.entityRenderer;
        
        RenderGlobal renderGlobalBackup = mc.renderGlobal;
        EntityLivingBase viewportBackup = mc.renderViewEntity;
        int heightBackup = mc.displayHeight;
        int widthBackup = mc.displayWidth;
        int thirdPersonBackup = settings.thirdPersonView;
        boolean hideGuiBackup = settings.hideGUI;
        int particleBackup = mc.gameSettings.particleSetting;
        mc.gameSettings.particleSetting = 2;

        int width = 128;
        int height = 128;
        
        mc.renderGlobal = mc.renderGlobal;
        mc.renderViewEntity = player;
        mc.displayHeight = height;
        mc.displayWidth = width;
        
        settings.thirdPersonView = 0;
        settings.hideGUI = true;
        
        int fps = EntityRenderer.performanceToFps(mc.gameSettings.limitFramerate);
        
        if (settings.limitFramerate == 0) {
                entityRenderer.renderWorld(renderTime, 0L);
        } else {
                entityRenderer.renderWorld(renderTime, (1000000000 / fps));
        }
        
        int k = width * height;
        int[] dataarray = new int[k];
        IntBuffer databuffer = BufferUtils.createIntBuffer(k);

        GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
        GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
        databuffer.clear();
        GL11.glReadPixels(0, 0, width, height, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, databuffer);
        databuffer.get(dataarray);
        reconfigureArray(dataarray, width, height);
        
        settings.thirdPersonView = thirdPersonBackup;
        settings.hideGUI = hideGuiBackup;
        
        mc.displayHeight = heightBackup;
        mc.displayWidth = widthBackup;
        mc.renderGlobal = renderGlobalBackup;
        mc.renderViewEntity = viewportBackup;
        mc.gameSettings.particleSetting = particleBackup;
        
        return dataarray;
    }

//I actually have no idea what purpose this function serves, but Vanilla uses it with screenshots.
private void reconfigureArray(int[] dataarray, int width, int height) {
	int[] aint1 = new int[width];
        int k = height / 2;

        for (int l = 0; l < k; ++l)
        {
            System.arraycopy(dataarray, l * width, aint1, 0, width);
            System.arraycopy(dataarray, (height - 1 - l) * width, dataarray, l * width, width);
            System.arraycopy(aint1, 0, dataarray, (height - 1 - l) * width, width);
        }
}

[TheGreyGhost]

Hi

 

Beats me!

 

Have you tried looking in

EntityRenderer.orientCamera() to see if you can figure it out using breakpoints?

 

I also notice an interesting setting

this.mc.gameSettings.debugCamEnable

which might get you the control you need?

 

-TGG

 

 

[Draco18s]

I figured it out yesterday, pure guess.

 

The rendered YAW is based on entity.rotationYawHead.