How do I rotate points of object

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 11/04/2005 at 05:56, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   9.1
Platform:   Windows ;   Mac OSX ;
Language(s) :   C.O.F.F.E.E ;

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How do I rotate points of object. I want to rotate axis like the object tool.
I have read [First you have to rotate the object.Then you have to rotate the points of the object back.] I can rotate the object but what is the formula to rotate the points of it. When I run the get points command
it comes back as a point array. when I try to rotate this I get incompatible values array/object error. Does anybody know about this? and how to fix it.

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 11/04/2005 at 13:30, xxxxxxxx wrote:

Ok figured out how to center axis of object with this code. But how do I rotate axis independent of object like object tool.

main (doc,op)
{
// this finds the center of the objects points.

var doc = GetActiveDocument();// Get Active Document
var obj = GetActiveObject(doc); // Get Active Object

var object = doc->GetFirstObject();
var c, ty = vector(0.0), scale = 1.0 / float(object->GetPointCount());
for (c=0; c<object->GetPointCount(); ++c) ty += object->GetPoint(c) * scale;
ty = object->GetMl()->GetMulP(ty);

// get inverted matrix of object and the translation vector to new position

var inv = object->GetMl(); inv->Invert();
var trans = inv->GetMulV(ty - object->GetPosition());

// move object to a new position and consider vertex positions

object->SetPosition(ty);
for (c=0; c<object->GetPointCount(); ++c) {
object->SetPoint(c, object->GetPoint(c) - trans);
}
object->Message(MSG_UPDATE);

// Positions of child objects

var child = object->GetDown();
for (; child; child = child->GetNext()) {
child->SetPosition(child->GetPosition() - trans);
}
return TRUE;
}

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 21/04/2005 at 13:41, xxxxxxxx wrote:

Use a matrix, for example mat=HPBToMatrix(), for the transformation. Then you use do the following pseudo algorithm:

    
    
    obj->SetMl(mat*obj->GetMl());  
    mat->Invert();  
    get points  
    for (all points)  
    {  
      points[i] = mat*points[i];  
    }  
    set points

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 21/04/2005 at 13:42, xxxxxxxx wrote:

The same for child objects as for the points. For all children, do child->SetMl(mat*child->GetMl()).