Algodoo

Another approach would be to make the purple circles collision AG and the purple door collision all except AG. The brown circles would then be collision BG and the brown door collision all except BG. And so on. This is a moot point since your scene does the job well.

Nicely done and educational.

Very innovative. Kilinich circle gear concept might improve efficiency.

I made the following modifications to the scene:
1. Changed the car body collision layer to B.
2. Added (2) lasers with collision layer B.
3. Put first laser above and pointing down to track at 140 meter mark.
4. Put second laser same level and direction but slightly beyond end of water section.
5. Added (e)=>{Sim.timeFactor = 0.1} to onLaserHit script of 1st laser.
6. Added (e)=>{Sim.timeFactor = 1.0} to onLaserHit script of 2nd laser.

This creates a slow motion effect as the car goes thru the water.

Feel free to use this in your scene. I could upload the modified scene but I did not want to steal your idea.

The new scene looks good and works well. Thanks for the credit.

I made one of these before realizing that you had already made one. I like your scripting, its simple and direct.

Nice. Works well. Might be better if operated with arrow keys (up/down for red lever, left/right to spin), but this may be easier said than done for the spinning operation.

Also blew up for me with Algodoo 1.8.0. Reduced spring rates to 100 N/m and no longer blew up. Springs are behind orange boxes.

Very nice. Please add special maneuvers.

Did not work for me with Agodoo 1.8.0 until I reduced all the spring constants to 100 N/m.

Worked for me only when hinge Impulse Break Limit set between 1.10 and 1.60 Ns. Worked 100% of the time between these limits. Nice solution. This one will be hard to beat.

I also liked shamus030 solution to the same challenge because of its simplicity.

It may have to do with the speed of the computers. My computer is AMD Athlon, 2 GHz, 512 RAM, with XP Pro SP3. Your scene will also work OK for me if I set Sim.Frequency to 500. So reducing the spring rate or increasing the frequency causes the non-working scene to work on my computer.

Must eat brains ... Nice.

Nice. Works good.

Nice demo. Very user friendly.

Another scripting approach would be to place "(e)=>{scene.my.green = e.geom.color(1)}" in the green laser onLaserHit event. Then you would not need the multiple "(e)=>{scene.my.green = color(1)}" in the box onHitByLaser event. Likewise for other colors.

Very nice. This one is going to get a lot of hits.

Nice refinement of FruitMonger's scene. You might be able to fly a kite in the wind tunnel.

This device can lift 1 million (really 80) kg. Nicely done.

Thanks for the suggestion. Its a good idea and I tried unsuccessfully to do it. Maybe somebody else will improve on it. For now it is what it is.

Testing: How do you display a backslash n in the comments?

text = "qwerty" + "\
"

\a\b\c\d\e\f\g\h\i\j\k\l\m
\o\p\q\r\s\t\u\v\w\x\y\z\:\;\.\,\"\'\<\>\?\=\-

Great scene. For those who don't know, this is a scene from Scanners the movie.

Nice. Works much better than the one I recently made.

Variables are not being saved with program. Rename variables Scene.my.water1 and Scene.my.water2. Put {Scene.my.water1} in collideWater property box in script menu for water1 box. Do similar for water2 box.

I can think of 4 ways:

1. Generate the curve using mathematical equations on a spreadsheet. Create a simple polygon in Algodoo and save as .phn. Open .phn with text editor and replace coordinates of simple polygon with those from spreadsheet.

2. Add laser and block whereby laser hits block at center of tracer. Use Print command to output LaserHit location to console (with added formatting for polygon). Cut and paste from console to .phn file.

3. Copy screen. Save area that has tracer paths. Erase parts you don't want. Make background transparent. Save as .png. Load as texture. Then use "Generate Geometry From Texture" function in Algodoo.

4. Save screen shot of tracer path as bmp. Use bmp2phn program.

Not yet. Valve box scripts need "collideWater = {scene.my.waterx}" (x=1 or 2). You may have to initialize scene.my.waterx = true in the console first if "collideWater = {scene.my.waterx}" does not stick. I will delete this comment when you fix it.

Nice (welded) joint effort.

Nicely done.

OK to use it however you like. You do not need to give me any credit.

Very nice. You did all the work and we just sit back and watch.

Nicely Done.

1.0735048-1.0735043 = 4.7683716e-007

Close enough to true answer of 5.0e-007.