Does anyone know, why the transformation matrix isn't empty at the beginning of a program? If I do the following:

1. size(100,100,P3D);
   
2. PMatrix3D pm = (PMatrix3D) getMatrix();
   println("( "+pm.m00+" , "+pm.m01+" , "+pm.m02+" , "+pm.m03+" )");
   println("( "+pm.m10+" , "+pm.m11+" , "+pm.m12+" , "+pm.m13+" )");
   println("( "+pm.m20+" , "+pm.m21+" , "+pm.m22+" , "+pm.m23+" )");
   println("( "+pm.m30+" , "+pm.m31+" , "+pm.m32+" , "+pm.m33+" )");
   

I get this result:

( 1.0 , 0.0 , 0.0 , -50.0 )
( 0.0 , 1.0 , 0.0 , -50.0 )
( 0.0 , 0.0 , 1.0 , -86.60254 )
( 0.0 , 0.0 , 0.0 , 1.0 )

I would expect, that the translation column is zero (except the last entry) but there are values of -50,-50,-86.

Why is it like this?

Hello,

I'm really in trouble with the export application function under Windows 7 64bit.

I tried Processing 1.2.1, 1.5.1, 2.0a6 application as well as applet export and the only version that was running was the batch file from Processing 2.0a6 in 64bit. All Java-Applications on the computer work properly (including Processing). Other applets also run in my browsers. I tested Processing with and without Java.

For all non working versions I get the message: "Could not find main class. Program will exit!"

The 2.0a6-version has a display error i.e. the sceen flashes permanently inside Processing as well as in the exported application. So I have no chance to run my application without Processing GUI.

Any suggestions available?

Hi,

I want to rotate a box around one corner, like if you roll a die. And I want to do it at an arbitrary position in space.

Maybe one can imagine a cuboid like a cupboard which I want to translate first from the center of a room (coordinates 0,0,0) to one corner and than (e.g. standing behind) pushing the cupboard in a way that it is tilting and falling on its doors (I hope the example makes it clear).

I tried several combinations of translate and rotate but didn't catch how to do it. Is anybody out there how knows how to do such a kind of rotation?

Thanks in advance

Michael

Hello,

I'm rather new to processing but (as any newbie ) found directly a bug.

I need to do some 3D modeling. If I plot a box which is much larger than the viewport I get a rendering error. This error is different in different situations so not 100 percent reproducible but nevertheless I can demonstrate it. Where is the problem?

This works:

1. void setup()
   {
     size(600,400,P3D);
     lights();
     smooth();
   
     camera(width/2+100,height/2-100,100,
            width/2,height/2,0,
            0,1,0);
           
     fill(150,0,0);
   }
   void draw()
   {
     background(255);
     float len = 1000.0*mouseX;
     translate(width/2,height/2-len/2,0);
     box(100,len,10);
   }
   

This doesnt work:

1. void setup()
   {
     size(600,400,P3D);
     lights();
     smooth();
   
     camera(width/2+100,height/2-100,100,
            width/2,height/2,0,
            0,1,0);
           
     fill(150,0,0);
    
     float len = 1000.0;
     translate(width/2,height/2-len/2,0);
     background(255);
     box(100,len,10);
   }