Changing to Collision?

[AwkwardOrpheus]

This is my first time using love2D and Lua and I've kinda went through a workaround for the collision with ground, and I've got no idea how to add collision now.

I honestly don't understand the ground and collision things because my friend helped me do all that but he doesn't how to make a fully working collision onto my ground either.

This was just a little test for me to use with Lua, and I've been adding since.

Anybody up for helping me out?

[baconhawka7x]

I don't understand what you are asking, it looks like your collision works just fine.

[AwkwardOrpheus]

I mean if I were to add walls, or anything else, all i've added is a floor, and my player isn't colliding to it.

[baconhawka7x]

I suggest checking out bounding box collision(https://love2d.org/wiki/BoundingBox.lua) if you haven't already. But basically you want to get the x and y of the player(Which I'm pretty sure you have already), which are in the top left corner of the picture. Then get all three other corners, do the same for a wall, and then do something like

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if heroCornerLeft.x < wallCornerRight.x then
    herocornerLeft.x = wallCornerRight.x
end

But also include the y positions too. The only downside to bounding box is the "box" part:p

[AwkwardOrpheus]

I suggest checking out bounding box collision(https://love2d.org/wiki/BoundingBox.lua) if you haven't already. But basically you want to get the x and y of the player(Which I'm pretty sure you have already), which are in the top left corner of the picture. Then get all three other corners, do the same for a wall, and then do something like

Code: Select all

if heroCornerLeft.x < wallCornerRight.x then
    herocornerLeft.x = wallCornerRight.x
end

But also include the y positions too. The only downside to bounding box is the "box" part:p

Where would this go?

in:

Code: Select all

function CheckCollision(ax1,ay1,aw,ah, bx1,by1,bw,bh)

?

[Kadoba]

He was giving an example on how you resolve the collision. You have to think of collision in two parts: detection and resolution. In other words, first you find out if you have a collision and then you do something about it. In your case you want to move the player out of the floor/wall/whatever.

That CheckCollision function is only the detection part.

[baconhawka7x]

He was giving an example on how you resolve the collision. You have to think of collision in two parts: detection and resolution. In other words, first you find out if you have a collision and then you do something about it. In your case you want to move the player out of the floor/wall/whatever.

That CheckCollision function is only the detection part.

Exactly, just do something like

Code: Select all

is_collided = false

or some such.

[baconhawka7x]

He was giving an example on how you resolve the collision. You have to think of collision in two parts: detection and resolution. In other words, first you find out if you have a collision and then you do something about it. In your case you want to move the player out of the floor/wall/whatever.

That CheckCollision function is only the detection part.

Exactly, just do something like

Code: Select all

is_collided = false

or some such. and then detect if it's true or not with the help of boundingbox.

[AwkwardOrpheus]

I seem to be still having a problem with collision because the tutorial is using solid objects, I'm using images - http://pastebin.com/QrWkuxwc

Still quite new with lua ;?

[Kadoba]

What do you mean by solid objects?

Your collision system right now is just basically not letting the player go below a certain point so it appears you have a floor.