Simple, lightweight, general purpose collision detection

[TechnoCat]

There will be a tutorial featuring how to write a simple game using HardonCollider soon.

Please involve rolling circles!

[vrld]

Changes!

• I finished writing up Part 0 and Part 1 of the tutorial. It involves no rolling circles though.
• There are now point-in-shape and ray-intersection tests.
• Tweaks for huge (or mediocre) performance gains

The future:

• Point Shapes
• Part 2 of the tutorial
• Part 3 of the tutorial
• Something else? (Any feature you wish for?)

[TechnoCat]

• Something else? (Any feature you wish for?)

Rolling circles!

[miko]

Maybe it's a little early to ask this, but - will it be Lua & C++, or Lua-only?

It would probably make the most sense to make it Lua-only, because more lovers are familiar with Lua than with C++ and more importantly, if we do use C++ and want to gain any traction, it would have to be included in the LÖVE core, and I don't know how the devs feel about that. If they do want to include it, the heavy stuff and inner loops could probably be done in C++.

Note: for love compiled with luajit2, the pure lua implementation actually will be faster than using C++ because it is expensive to cross lua/C++ boundary.

[vrld]

Welcome to the future:
HardonCollider now has point shapes (useful for (slow) bullets and stuff)
I've also fixed this bug and another bug with collisions between circles.

Rolling circles!

I can offer you one rolling (and bouncing) circle:

[Robin]

I can offer you one rolling (and bouncing) circle:

That *is* crazy! (Everyone who doesn't know what I'm talking about: let the ball roll down and wait. Perpetual motion FTW!)

[TechnoCat]

Rolling circles!

I can offer you one rolling (and bouncing) circle:

My dreams, they come true!

[chris]

I humbly want to request a feature for Hardon Collider.

There is a shape:move() and a shape:moveTo() function. The moveTo sets the position.
There is also a shape:rotate() function. But not a rotate function that sets the rotation. I would really like that.

[vrld]

I humbly want to request a feature for Hardon Collider.

Done. you can set the rotation with shape:setRotation(). As a by-product, you can get the shape's rotation with shape:rotation().

[chris]

Nice Another question:

Why is it that if I make a rectangle:
box.x = 5
box.y = 6
box.box = HC.addRectangle(box.x,box.y,50,50)

And I want to move it 3 pixels to the right, I have to write this:
box.box:moveTo(box.x+25+3,box.y+25)