L B Posted October 17, 2011 Posted October 17, 2011 While building my rope bridge, I set a ball joint to every connecting cylinder of the ropes. But now I've decided to be a little more realistic, and adjust the masses properly. The rope cylinders have a low mass (rope is not heavy), calculated by density and their volume. The planks have a mass of about 2 kilos, or about 5 pounds. The problem is, the ropes do not seem to be able to handle that much tension. The bridge just falls into the abyss and the cylinders go crazy trying to hold it back. In the real world, the masses are OK, so it's the joints that are having a problem. The way I see it, a joint should be able to handle so much force, in that case the weight of the planks. And it shouldn't "expand", unless I want it to. It should stay solidly in place. Now the joint stiffness has no effect on that. Lumooja told me the joint strength doesn't work, and to use forces to simulate it. So, what am I doing wrong here? There seems to be a physics parameter I don't have control on, that is, the strength of the joints. Quote
Josh Posted October 17, 2011 Posted October 17, 2011 I'll fix this in a new build... 1 Quote My job is to make tools you love, with the features you want, and performance you can't live without.
Flexman Posted October 17, 2011 Posted October 17, 2011 Cool. I spent an evening trying to keep wheels on a helicopter. It was impossible, they kept falling off when you put any sizeable mass on them. I thought it was just me (being a bit tubby these days through sitting all day and eating comfort food). Quote 6600 2.4G / GTX 460 280.26 / 4GB Windows 7 Author: GROME Terrain Modeling for Unity, UDK, Ogre3D from PackT Tricubic Studios Ltd. ~ Combat Helo
Canardia Posted October 18, 2011 Posted October 18, 2011 Or maybe a pre-alpha version of LE3 would be even better Quote ■ Ryzen 9 ■ RX 6800M ■ 16GB ■ XF8 ■ Windows 11 ■ ■ Ultra ■ LE 2.5 ■ 3DWS 5.6 ■ Reaper ■ C/C++ ■ C# ■ Fortran 2008 ■ Story ■ ■ Homepage: https://canardia.com ■
L B Posted October 18, 2011 Author Posted October 18, 2011 Or maybe a pre-alpha version of LE3 would be even better Shh that's in too long, I need joints now. Don't let Josh postpone it so much! Quote
Road Kill Kenny Posted October 19, 2011 Posted October 19, 2011 Yipeee stiff joints would be awesome. Quote STS - Scarlet Thread Studios AKA: Engineer Ken Fact: Game Development is hard... very bloody hard.. If you are not prepared to accept that.. Please give up now!
cassius Posted October 19, 2011 Posted October 19, 2011 I got stiff joints, but I am 87. but the wheels aint falling off yet. Quote amd quad core 4 ghz / geforce 660 ti 2gb / win 10 Blender,gimp,silo2,ac3d,,audacity,Hexagon / using c++
Road Kill Kenny Posted October 19, 2011 Posted October 19, 2011 I got stiff joints, but I am 87. but the wheels aint falling off yet. LOL! classic answer Quote STS - Scarlet Thread Studios AKA: Engineer Ken Fact: Game Development is hard... very bloody hard.. If you are not prepared to accept that.. Please give up now!
Flexman Posted October 29, 2011 Posted October 29, 2011 Did you see the report in the bug tracker? http://www.leadwerks.com/werkspace/tracker/issue-219-joint-stiffness-newton/ Quote 6600 2.4G / GTX 460 280.26 / 4GB Windows 7 Author: GROME Terrain Modeling for Unity, UDK, Ogre3D from PackT Tricubic Studios Ltd. ~ Combat Helo
Josh Posted October 29, 2011 Posted October 29, 2011 I also think you will have problems if one body has a large mass, and a connected body has a small mass. If you need greater joint power, the problem is it will lead to more vibration and instability, because it will add a lot more energy into the system. Quote My job is to make tools you love, with the features you want, and performance you can't live without.
L B Posted October 30, 2011 Author Posted October 30, 2011 In a real-life scenario, you can attach an elephant to a rope with a strong metal joint. it won't "vibrate" and go "unstable" if the joint is strong enough. Quote
Josh Posted October 30, 2011 Posted October 30, 2011 In a real-life scenario, you can attach an elephant to a rope with a strong metal joint. it won't "vibrate" and go "unstable" if the joint is strong enough. A computer simulation is not real life. If you were using PhysX, there would be even more arbitrary problems like this that don't match reality. Quote My job is to make tools you love, with the features you want, and performance you can't live without.
L B Posted October 31, 2011 Author Posted October 31, 2011 A computer simulation is not real life. If you were using PhysX, there would be even more arbitrary problems like this that don't match reality. Will you fix the bug or not? Quote
Josh Posted October 31, 2011 Posted October 31, 2011 Explanation and plans here: http://www.leadwerks.com/werkspace/tracker/issue-219-joint-stiffness-newton/ Quote My job is to make tools you love, with the features you want, and performance you can't live without.
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