@youthreewire said: Hello, I am trying to convexify a pretty a CAD file using Fredo tools but I get this error always. Please let me know what has to be done to overcome this. This happens with files exported from Fusion 360 or other CAD softwares to stl imported into sketchup or direct export from Fusion 360 to sketchup file. Please look at the attached image. I sugest you post te model. Otherwise difficult to tell what is the issue.

I want to read the collision force from MSphysics when two bodies collide and send it to my C code. So two parts to my questions 1)How do I read collision force in the MSphysics ruby code? 2)How do I send these read values back to my C code.

Could some one tell me how to solve this problem?

To make any concave, movable shape in SP you need to create a group consisting of sub-convex groups. Your top level group should be set to Compound2 shape. Your sub-groups are by default considered as a Convexhull, however, you can specify their shape otherwise. To make your "C" group have a concave collision you have to break it down to convex groups, group them together, and make the parent group a Compound2 shape. To set group shape, pick any desired group(s), right click (enter context menu), and select SketchyPhysics -> Shape -> Compound2. Note that SketchyPhysics 3.2 doesn't have a Compound2 shape. To produce a concave shape in SP3.2, associate the parent group as a Default shape and sub-groups as Convexhull shapes. Groups of Default shapes can be associated in later SP versions, but the problem is that Default shape doesn't have a true centre of mass, whereas Compound2 shape does have a true centre of mass. That's why I suggest using Compound2 over Default shape if you're using SP3.6. Anyway, here is a sample, which is compatible with SP3.2 or higher: movable convave shape.skp

Thanks I will give it a try and let you know about my progress.

Not really. You just have not been working with the correct org.

Look at the linetool.rb example that ships with Sketchup. All you need to do is use the two picked points and length=point1.distance(point2) without drawing the line at all. You can then 'format' the result as desired...

Thanks Chris..

Bravo Sriranjan. I am impressed with your skills! It is good to see such an advanced use of SU and Ruby!

The full SketchUp API works from SketchyPhysic's scripting

(I'm the writer of Beginner, and most of intermediate) Hey there! Phy's right, intermediate script and onwards goes into the multi-line onTick and onTouch fields. onTick is effectively a standard script field, with the script executed every frame, or every few frames, depending on the rate you set. onTouch is executed every frame, or rate frame, while the selected object is hitting another. The important thing to note is that these fields are only visible with SP3 X, which you can find on the link under the 'What's new' section, on the main page of the wiki. Just install and go! If by 'motion sequencing' you mean Chris' Knight Game animation system, that's very advanced. You may want to play around with more simple scripts before attempting something like that

Well since googles products are mostly innovative,simple and based on intuition their products work like awesome.One thing which most of the physics engine don't do is: Say in a physics engine I make body move over a surface from point A to Point B with just a simple command "Move body M from point A(x1,y1,z1) to B(x2,y2,z2).But there isn't a feature which dynamically shows the free body diagram of the body with the forces working on it.Phiilips,if one can incorporate such a feature where in the force vectors are indicated by a solid translucent arrow whose orientation and length shows the forces acting on the body qualitatively then it would improve the visualization of the physics happening in there and this would also help the person better study the model.I feel it would be simply awesome

Try these! http://sketchup.google.com/3dwarehouse/details?mid=5978e831481551f7c5d54ad137209c7f Bep