Request a Tutorial

[Tony]

probably with the use of Mouse.Where and Font.Draw

[QuantumPhysics]

And simple addition and subtraction!

[JakeTakeLake]

I really need a tutorial on ragdoll physics! Like seen in this video: http://youtu.be/bkuOQ6rsjvQ

Maybe this is too hard for turing; I have no idea how to do this. I would really appreciate a tutorial!

[Nathan4102]

That would require a decent physics engine, especially if done in 3d. Way too hard for a novice programmer, way too much effort for an experienced one.

[Raknarg]

haha yeah I'm still trying to figure out how to make a decent physics engine. Colliding objects are hard to deal with

[andrew.]

I don't believe that the choice of programming language plays a huge part in building a basic physics engine from scratch. I think the most difficult part would be figuring out the math behind all the physics calculations.

[Nathan4102]

I don't think turing is capable of running a physics engine at a reasonable speed though (Like a ragdoll game)

[Raknarg]

Actually, it is. Someone released a game some time ago that I have on my computer that has a great physics engine in turing. It's all a matter of your efficiency.

[Nathan4102]

So Turing can run a physics engine, but can't play music without severe lag... :/

[Raknarg]

No, it can play music fine. Perhaps you're just doing it weird.

[Nathan4102]

This is one of the first things I made in turing, a crappy jumpscare game. Compare the speed with music, and the speed without music. What am I doing wrong?

http://www.2shared.com/file/atWj5BI9/Ball_game.html

[JakeTakeLake]

Maybe just a joint physics tutorial? For example, limbs that you can rotate by clicking and dragging them? This would be amazing

[Insectoid]

Rotating around a point is fairly simple, though it requires some trigonometry. Say you want to rotate around the point (x,y) in the image by n degrees. You should first calculate how far that point is from the centre (you can use Math.Distance for this). Since Turing can only rotate images through their centres by default, once you rotate the image, the point (x,y) will have moved. You need to figure out where it moved to. The distance of the point from the centre will not have changed, and you know the angle it moved through. This forms a right triangle. Using sine law (remember SOH CAH TOA from 10th grade math?) you can calculate where the point is relative to the centre of the image. This tells you how much you need to shift the image by.

code:

function rotate (x,y,n) %rotate n degrees around (x,y)     hypotenuse = Math.Distance (centreX, centreY, x, y) //calculate the distance between (x,y) and the centre     Pic.Rotate(image, n) //rotate the image around the centre     offsetX = hypotenuse * cosd(n) + 0.5*Pic.Width(image) //gives the new x relative to the centre     offsetY = hypotenuse * sind(n) + 0.5*Pic.Height(image) //gives the new y relative to the centre     centreX += (offsetX - x) //translate the image so that (offsetX, offsetY) = (x,y)     centreY += (offsetY - y)

There's probably a few mistakes in there, since I wrote it on the fly and didn't bother testing it, but it demonstrates the concept and you could probably get this working in Turing.

The real challenge in a physics engine is figuring out where the rotation point is.

[JakeTakeLake]

Thanks I understand how to rotate the image, its actually pretty easy. But, how do I translate the image after its been rotated so that it rotates on a specific spot on the image, as opposed to the center?

[Insectoid]

If you read my post, you'd realize that I did that.