[SOLVED] export animation spline from 3DS MAX

[chromebird]

Does anybody know from where does animation spline takes its coordinates?

After I place the spline in editor and start animation it changes its coordinates. The animation is a platform moving up and down. Only Z coordinates change. No changes in X,Y axis. The animated object was placed in 0 coordinates in MAX and this is where animation starts. In editor I place world transform object with my spline in 0 coordinates of its parent. When I hit play animation the spline (and world transform with attached mesh) move fare away by X, Y.

Why?

[ulf.schroeter]

Why?

 

Most probably because your exported spline frames include X,Y offset data. You should post your *.spline data file.

[chromebird]

Thank you for quick reply. It would be great if you could help. I attached the file in .zip archive because this site did not allow me to upload .spline file type.

elev_platf_03.zip

[ulf.schroeter]

Load following spline.cpp/.world as spline-world, invoke console and look out for non-0 spline X/Y data via new console command "dumpSpline <your filename>". You can than patch your spline file to required (0,0,Z) format by console command "patchSpline <your filename>.

 

This does not solve a potential spline export issue, but at least might be a temporary work-around for you. I will take a look on monday.

 

spline.cpp

#include <core/unigine.h>
#include <core/scripts/system.h>

int init() {

  engine.console.addCommand("dumpSpline", "dumpSpline <filename>  dump spline file position data", "dumpSpline");
  engine.console.addCommand("patchSpline", "patchSpline <filename>  patch spline file position data to (0,0,Z)", "patchSpline");

  return 1;
}

int shutdown() { return 1; }
int update()   { return 1; }


void dumpSpline( string filename )
{
  WorldTransform transform = new WorldTransform(filename);

  for( int i=0; i<transform.getNumFrames(); i++ )
  {
vec3 pos = transform.getFramePosition(i);

log.message("Frame %d   X=%f, Y=%f, Z=%f\n", i, pos.x, pos.y, pos.z);
  }

  delete transform;	
}

void patchSpline( string filename )
{
  WorldTransform transform = new WorldTransform(filename);

  for( int i=0; i<transform.getNumFrames(); i++ )
  {
       vec3 pos = transform.getFramePosition(i);

       pos.x = 0.0f;
       pos.y = 0.0f;

transform.setFramePosition(i, pos);
  }

  transform.save(filename);

  log.message("Patched %d frames\n", transform.getNumFrames() );

  delete transform;	
}

 

spline.world

<?xml version="1.0" encoding="utf-8"?>
<world version="1.12"/>

[ulf.schroeter]

Thank you for quick reply. It would be great if you could help. I attached the file in .zip archive because this site did not allow me to upload .spline file type.

 

Hi chromebird, as expected your spline data contains a constant x-y-offset of [-79.448, 312.688]. Exporting some animation splines for object at 0/0/0 from 3DSmax 2010 works for me without any issue. Maybe you should try to do a spline re-export. If you still encounter the problem, than feel free to post your 3DS max scene for further investigation.

 

[chromebird]

I was away from work last week. I tried to re-export the spline yesterday and it turned out fine. Your test helped me to localize the problem. The x-y-offset was the same with the previous x-y coordinates in Max scene. I guess the problem appeared because I did not reset object's transforms. Animation played well in Max but at export the spline took old coordinates of the object relatively to the center of the scene. I deleted all animation keys, applied ResetXForm modifier, animated the object and exported as a spline again. This time the spline's position was correct. Thank you very much for your help.