Solid Objects in my Zelda Game (Picture inside)

[RetroRain]

Everything that is on the screen is a background object, with the exception of the character, which is an active object. I now have to make the top wall, left and right walls, the bottom wall and the statues a solid object, so the character can't walk right through them. Now, I read that if you do a colission detection, you can actually set the x and y coordinates of the player after the player collides with an object.

However, if you're familiar with Zelda, this could be a little tricky right? When Link walks to the left, underneath a statue, his head and hat touches the statue, but Link isn't technically touching the statue. Do you know what I mean? So, how do I get around this? Do I have to actually test the hot spot itself? Is that possible to do? And, is it possible to detect which direction Link is coming from, so when he touches it from the top, I can set the Y coordinate up 1?

Here is a picture I made, to illustrate what I'm talking about. Link walks underneath that statue, but he isn't touching it. So I would have to make the collision detection with his torso.



Any help would greatly be appreciated. Thanks.

[Jacob]

The easiest way to do this is to make a small active with your movement events on it, and Always: Set the position of the graphic to the small active. This way only when the foot of the character touches an obstacle, a collision is detected.

[RetroRain]

Do you know how to test multiple directions? Like, when Link touches the statue from the bottom, or from the top, left or right? I don't know how to do that. All I know how to do is detect the collision between Link and the statue, but it is important to determine which direction Link is coming from, so I can adjust the X/Y coordinates accordingly. Thanks.

[Jahkri]

You could also create a small active at the top of the Statue (or ofcourse every statue if you need colision-detection with every Statue) and hide it at runtime. Then you can do a colision-Detection of Link against the invisible Active. And as the Invisible Active just covers the upper third of the Statue you can get the effect i think you want to achieve. For the Walls you can achieve the same effect by creating an invisible Active-Object (Line-Shape) and put it somewhat "into" the Wall. Then just do a colision-detection to the hidden "Line"-Active-Object. Thats how i did when i tried something similar.

Greetings from Switzerland

jahkri

[Watermelon786]

Or change the statues to static backdrops and add a small invisible obstacle the size of the statue in lieu of an active. I've never played the original zelda, so I don't know how the statues work, but put the object at where the logical base of the statue would be.

[Jacob]

You could also create a small active at the top of the Statue (or ofcourse every statue if you need colision-detection with every Statue)

This is inefficient, as every object would need this. Which you stated. My way is pretty much the exact same, but the detector is on the player instead. Which means only one detector.

[RetroRain]

Thanks for the advice guys. I understand what you are saying, and I am applying it to my game. One last thing.

Is there a way to make it so that the player doesn't bounce after touching an obstacle? For example, I have it so that when the player touches the statue, it stops the movement (Movement --> Stop), but it also looks like the player gets pushed away from the statue. And if you keep running into the statue, it will look like the player keeps bouncing from it. I want it so that the player doesn't appear to be bouncing, he simply doesn't move after touching the solid obstacle.

[BAugustus]

RetroRain, regarding testing direction of collision (just for general knowledge), first make a "onCollision" event like you usually do.

Then, right click the existing condition and "add" a new one, this time, checking for the direction of the active you need to check. This will bring up the direction dialog box.

Once it's all done, you have a condition with two conditions, BOTH of which must be met before the condition goes ahead.

In pseudo english:

> Active collides with backdrop
+ Active is facing left
= Do something

Hope that helps!

As for the Link problem, I would use the active-object idea that the guys above mentioned.

[Dynasoft]

Thanks for the advice guys. I understand what you are saying, and I am applying it to my game. One last thing.

Is there a way to make it so that the player doesn't bounce after touching an obstacle? For example, I have it so that when the player touches the statue, it stops the movement (Movement --> Stop), but it also looks like the player gets pushed away from the statue. And if you keep running into the statue, it will look like the player keeps bouncing from it. I want it so that the player doesn't appear to be bouncing, he simply doesn't move after touching the solid obstacle.

This can happen if you have an animated character and are testing for collision against him, because he constantly changes. This is why a hidden collision box is recommended.

[Aloan]

Genius!