(15-11-2021, 07:36 AM)srid96 Wrote: Hi,

I need to find the last point of rope in script, not the particles(because when moving the rope, particles seems to be bit late to reach the rope rendered position.

I know this is basic ques, I have searched everywhere, I couldnt get what i need.

Quote:The solver will also generate renderable particle positions and orientations at the end of every frame. You can access them like this:

Vector3 pos = solver.renderablePositions[actor.solverIndices[0]];

If the solver's interpolation mode is set to "interpolate", solver.renderablePositions will contain temporally smoothed-out positions that won´t coincide with the actual particle positions at the end of the simulation step. That's why they are called "renderable": they are only used for smooth rendering, but they aren't fed back into the simulation.

(15-11-2021, 08:40 AM)josemendez Wrote: Hi!

This is explained in the "scripting particles" section manual:
http://obi.virtualmethodstudio.com/manual/6.2/scriptingparticles.html


let me know if you need further help. cheers!

(15-11-2021, 09:08 AM)srid96 Wrote: can you help me on how to get the last point on rope?

(15-11-2021, 09:21 AM)josemendez Wrote: The manual explains how to get the position of any particle in the actor. The last one (or the first one, the 3rd one) is no different from any other. Instead of iterating trough all particles in the actor.solverIndices array, get the last one:

Code:

var lastPos = solver.renderablePositions[actor.solverIndices[actor.solverIndices.Length-1]];

Keep in mind that if you're tearing or resizing your rope at runtime, you will need to use rope elements to consistently get the last particle (as it will change at runtime). See the API docs for more info.

(15-11-2021, 03:35 PM)srid96 Wrote: I did this, but my position seems to be somewhere other than end of the rope. I have attached for your reference. Let me know how to fix this.
Thank you.

(15-11-2021, 03:39 PM)josemendez Wrote: Hi,

Can't see any attached code/file to your post.

(15-11-2021, 03:42 PM)srid96 Wrote: Sorry, i didnt know what happened.

Quote:All spatial properties (positions, orientations, velocities, vorticities, etc) are expressed in the solver's local space.

[attachment=1171 Wrote:[attachment=1170]josemendez pid='11140' dateline='1636987641']Positions (and all other particle data) in Obi are expressed in solver space:
http://obi.virtualmethodstudio.com/manual/6.2/scriptingparticles.html


However you're assigning your position to transform.position, which is expressed in world space. If you want to use it this way, you need to convert the particle position to world space first, using Unity's TransformPoint(): https://docs.unity3d.com/ScriptReference/Transform.TransformPoint.html

(16-11-2021, 08:30 AM)srid96 Wrote: Hi, transforming to world space did not put the object to the last point on rope. Is there anything else am I missing from the attachments? 

(16-11-2021, 08:30 AM)srid96 Wrote:  I also tried particle attachment of an object at the end of the rope (like in chains demo), i'm curious how that chainball moves smoothly and having mass of 5 units didnt jitter/dance where in my case i have to bring the mass to the lowest value to stop jittering and when moving rope , object is not moving smoothly like the chainball.