"How do I ZScript?"

[Gutawer]

someone else will have to reply with how to get the angle (which I'd like to know as well).

Well, once you have the line, you can access the line's delta vector and get the vector perpendicular to it:

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Vector2 perpVec = (-line.delta.y, line.delta.x).unit();

Once you've got that, you can use the formula r = d - 2(d dot n)n (where n must be normalised; this is the point of the .unit() call) to generate the reflected vector:

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Vector2 reflected = vel.xy - 2 * (vel.xy dot perpVec) * perpVec;

to get the Vector2 of reflection (you can upgrade this to 3d by making reflected a Vector3, removing all calls to .xy in the formula, and constructing a 3d perpVec (where Z will always be 0 since a linedef cannot be sloped)). Then, if you want the angle of reflection:

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double rAngle = atan2(reflected.y, reflected.x);

Provided all my maths is correct, that should work.

[phantombeta]

@Gutawer
How would I use RenderOverlay for this? I couldn't find anything on using it.
Also, I'm not entirely sure RenderOverlay would be the best way to do this... This is meant to simply display a message telling the player that they levelled up, then fade out.

[Agentbromsnor]

I'm trying to get the player's sprite to change depending on what direction the analogue input is providing for my 2D platform-game.

I currently have it set up like this, using a StateLabel array:

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void PlayerControls(void)
	{
		//All the animation states are placed in this array
		//The actual animation is called at the end of this function using SetStateLabel
		StateLabel animState[5];
		animState[0] = "Spawn";
		animState[1] = "Walking_right";
		animState[2] = "Walking_left";
		animState[3] = "Jumping_right";
		animState[4] = "Jumping_left";
		
		//This variable is used to call the animation states as presented above
		int myAnim = 0;
		
		double PlayerMovement = GetPlayerInput(INPUT_SIDEMOVE);
		
		if(PlayerMovement > 0)
		{
			Console.Printf("Right");
			int myAnim = 1;
			//if(PlayerAttacking)
			//{
				//Correct animation here
			//}
		}
		else if(PlayerMovement < 0)
		{
			Console.Printf("Left");
			int myAnim = 2;
			//if(PlayerAttacking)
			//{
				//Go to the right facing attack animation
			//}
		}
		SetStateLabel(animState[myAnim]);
	}
	
	override void Tick()
    {
		PlayerAngle();
		PlayerControls();
		Super.Tick();
    }
}

For some reason, the player will only display the right-facing sprite (only the first frame) and nothing else no matter what movement I try. What am I doing wrong here?

[Nash]

What I did for my side scroller starter kit was just use non-rotating sprites (0 angle suffix) and scale the sprite's X negatively to make it flip left. This has the benefit of you only needing to provide art once instead of twice.

[gwHero]

True, and instead of making X negative, this might even work now since GZDoom 3.1.0

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bSPRITEFLIP = (PlayerMovement < 0);

[Agentbromsnor]

Oh, that's definitely something I'll consider adding. But... My code isn't working. Or is my current method somehow causing the code not to work properly?

[gwHero]

Don't know if this is the error for sure, but what I do see is that you declare myAnim 3 times; (I think the compiler actually should reject this).
Anyway, where you refer to myAnim in the IF this should be without the 'int' keyword:

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      int myAnim = 0;
      
      double PlayerMovement = GetPlayerInput(INPUT_SIDEMOVE);
      
      if(PlayerMovement > 0)
      {
         Console.Printf("Right");
         myAnim = 1;
      }
      else if(PlayerMovement < 0)
      {
         Console.Printf("Left");
         myAnim = 2;
      }
      SetStateLabel(animState[myAnim]);

[Agentbromsnor]

Oh wow, that's a good catch. I'll change that right away. Thanks!

[gwHero]

yw!
Hopefully it solved the issue

[Agentbromsnor]

Well, it certainly made things better, haha! It changes the player-sprite on left and right input accordingly, but it's still not animating. It should be animating...

I'm going to delve into the code some more, and if I go full derp again I might leave another comment here.

[ZzZombo]

It's obviously not gonna animate a thing if you keep resetting the state right back each tick.

[Agentbromsnor]

Oh yeah... I'm going to have to write a thing for that. Thanks! I still have a lot to learn in regards to ZScripting, obviously.

[vidumec]

is there any way to draw something on screen ( drawimage ) without having to redo the whole HUD in zscript from scratch?

[Nash]

Yes, make an EventHandler and draw it in RenderOverlay.

[vidumec]

ooh shiny, that's nice, thanks

edit: why does "DrawImage("sprites/SpriteName.png",(0,0))" work, but "DrawImage("SpriteName.png",(0,0))" doesn't? Assuming i have the same sprite in both "root" and "sprites" directories