[openvrml-develop] Viewpoint change

[cheribhai <cha...@gm...>]

Hello,
       A couple of questions concerning change in viewpoint.
(1) The VRML97 spec says that 'The jump field specifies whether the user's
view "jumps" to the position and orientation of a bound Viewpoint node or
remains unchanged.'
The way I see it, if jump is true the viewpoint user view transform should
by set to identity, which the following code does.

void openvrml_node_vrml97::viewpoint_node::bind(const bool val,
                                                const double timestamp)
    OPENVRML_THROW1(std::bad_alloc)
{
    this->is_bound_.value(val);
    last_user_view_transform_ = user_view_transform_;
    if(this->jump_.value())
        this->user_view_transform_ = openvrml::make_mat4f();
    node::emit_event(this->is_bound_emitter_, timestamp);
}

Am I right on this?

(2) I am trying to implement viewpoint change animation in a custom browser.
For this it seems that I need the attribute value of
viewpoint_metatype::bind function  to be set to visible (OPENVRML_API). 

Is this the way to go about what I want to do or is there another way around
this?


cheers - cherian
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