Polygon Collision?

[danlthemanl]

I'm implementing a collision system into my Level editor, I have rectangle collision all done, but I can't figure out how polygon collision could possibly work. Is this built into Love2d? Is there an module or api that does this for me? or is it easy to implement that I just haven't thought of?

help!

[tentus]

I'll just leave this here: http://love2d.org/wiki/love.physics

Also, http://vrld.github.com/HardonCollider/

[Kadoba]

It sounds like HardonCollider would be best suited for you. It's very easy to set up and use.

[Ensayia]

To answer more of your question, there is no existing implementation for collision other than the physics module and that only covers simple convex shapes from what I know. Anything more complex will require you to code it yourself.

A few seasoned users have done some simple libraries. Search for Fizz and HardonCollider on the wiki. Fizz isn't polygonal, but may contain code you can build from so long as you remember to credit Taehl. I know nothing of HC.

Love is a framework rather than an engine, something you can build these sort of features into through your own modules and/or libraries.

[BlackBulletIV]

To answer more of your question, there is no existing implementation for collision other than the physics module and that only covers simple convex shapes from what I know. Anything more complex will require you to code it yourself.

For shapes, love.physics (which is a wrapper around Box2D) supports circles and 8-point, convex polygons (including a helper for rectangles). If you need something more complex than that, you would use multiple shapes in association with a body.

Whether you go for custom collision or the physics system depends on your needs. If you want some simple collision detection, custom is the way to go. If you want physics simulation, love.physics is most likely best.

[vrld]

To answer more of your question, there is no existing implementation for collision other than the physics module and that only covers simple convex shapes from what I know.

Not true. HardonCollider does support collision between points, circles and arbitrary simple (=non intersecting) polygons, including rectangles.

If you don't want to use the existing detection system, you can build your own using the shape:collidesWith() method. You can even go deeper and just use the Polygon class that provides useful things like triangulation and splitting into convex sub polygons.

[nevon]

To answer more of your question, there is no existing implementation for collision other than the physics module and that only covers simple convex shapes from what I know.

Not true. HardonCollider does support collision between points, circles and arbitrary simple (=non intersecting) polygons, including rectangles.

Wouldn't two colliding polygons per definition be intersecting? Or am I misunderstanding something here?

[Ensayia]

I meant no existing implementation built into LOVE itself. Sorry if I confused people.

[Robin]

Wouldn't two colliding polygons per definition be intersecting? Or am I misunderstanding something here?

I think he meant polygons intersecting themselves.