310 lines
10 KiB
C++
310 lines
10 KiB
C++
// Filename: lensNode.cxx
|
|
// Created by: drose (26Feb02)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PANDA 3D SOFTWARE
|
|
// Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
//
|
|
// All use of this software is subject to the terms of the revised BSD
|
|
// license. You should have received a copy of this license along
|
|
// with this source code in a file named "LICENSE."
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
|
|
#include "lensNode.h"
|
|
#include "geometricBoundingVolume.h"
|
|
#include "bamWriter.h"
|
|
#include "bamReader.h"
|
|
#include "datagram.h"
|
|
#include "datagramIterator.h"
|
|
#include "perspectiveLens.h"
|
|
#include "geomNode.h"
|
|
|
|
TypeHandle LensNode::_type_handle;
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::Constructor
|
|
// Access: Published
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
LensNode::
|
|
LensNode(const string &name, Lens *lens) :
|
|
PandaNode(name)
|
|
{
|
|
if (lens == NULL) {
|
|
lens = new PerspectiveLens;
|
|
}
|
|
set_lens(0, lens);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::Copy Constructor
|
|
// Access: Protected
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
LensNode::
|
|
LensNode(const LensNode ©) :
|
|
PandaNode(copy),
|
|
_lenses(copy._lenses)
|
|
{
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::xform
|
|
// Access: Published, Virtual
|
|
// Description: Transforms the contents of this PandaNode by the
|
|
// indicated matrix, if it means anything to do so. For
|
|
// most kinds of PandaNodes, this does nothing.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
xform(const LMatrix4 &mat) {
|
|
PandaNode::xform(mat);
|
|
// We need to actually transform the lens here.
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::make_copy
|
|
// Access: Published, Virtual
|
|
// Description: Returns a newly-allocated Node that is a shallow copy
|
|
// of this one. It will be a different Node pointer,
|
|
// but its internal data may or may not be shared with
|
|
// that of the original Node.
|
|
////////////////////////////////////////////////////////////////////
|
|
PandaNode *LensNode::
|
|
make_copy() const {
|
|
return new LensNode(*this);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::set_lens
|
|
// Access: Published
|
|
// Description: Sets the indicated lens. Although a LensNode
|
|
// normally holds only one lens, it may optionally
|
|
// include multiple lenses, each with a different index
|
|
// number. The different lenses may be referenced by
|
|
// index number on the DisplayRegion. Adding a new lens
|
|
// automatically makes it active.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
set_lens(int index, Lens *lens) {
|
|
nassertv(index >= 0 && index < max_lenses); // Sanity check
|
|
|
|
while (index >= (int)_lenses.size()) {
|
|
LensSlot slot;
|
|
slot._is_active = false;
|
|
_lenses.push_back(slot);
|
|
}
|
|
|
|
_lenses[index]._lens = lens;
|
|
_lenses[index]._is_active = true;
|
|
|
|
if (_shown_frustum != (PandaNode *)NULL) {
|
|
show_frustum();
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::set_lens_active
|
|
// Access: Published
|
|
// Description: Sets the active flag for the nth lens. When a lens
|
|
// is inactive, it is not used for rendering, and any
|
|
// DisplayRegions associated with it are implicitly
|
|
// inactive as well. Returns true if the flag is
|
|
// changed, false if it already had this value.
|
|
////////////////////////////////////////////////////////////////////
|
|
bool LensNode::
|
|
set_lens_active(int index, bool flag) {
|
|
nassertr(index >= 0 && index < max_lenses, false);
|
|
|
|
while (index >= (int)_lenses.size()) {
|
|
LensSlot slot;
|
|
slot._is_active = false;
|
|
_lenses.push_back(slot);
|
|
}
|
|
|
|
if (_lenses[index]._is_active == flag) {
|
|
return false;
|
|
}
|
|
|
|
_lenses[index]._is_active = flag;
|
|
|
|
if (_shown_frustum != (PandaNode *)NULL) {
|
|
show_frustum();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::is_in_view
|
|
// Access: Published
|
|
// Description: Returns true if the given point is within the bounds
|
|
// of the lens of the LensNode (i.e. if the camera can
|
|
// see the point).
|
|
////////////////////////////////////////////////////////////////////
|
|
bool LensNode::
|
|
is_in_view(int index, const LPoint3 &pos) {
|
|
Lens *lens = get_lens(index);
|
|
nassertr(lens != (Lens *)NULL, false);
|
|
PT(BoundingVolume) bv = lens->make_bounds();
|
|
if (bv == (BoundingVolume *)NULL) {
|
|
return false;
|
|
}
|
|
GeometricBoundingVolume *gbv = DCAST(GeometricBoundingVolume, bv);
|
|
int ret = gbv->contains(pos);
|
|
return (ret != 0);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::show_frustum
|
|
// Access: Published
|
|
// Description: Enables the drawing of the lens's frustum to aid in
|
|
// visualization. This actually creates a GeomNode
|
|
// which is parented to the LensNode.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
show_frustum() {
|
|
if (_shown_frustum != (PandaNode *)NULL) {
|
|
hide_frustum();
|
|
}
|
|
PT(GeomNode) geom_node = new GeomNode("frustum");
|
|
_shown_frustum = geom_node;
|
|
add_child(_shown_frustum);
|
|
|
|
for (Lenses::const_iterator li = _lenses.begin();
|
|
li != _lenses.end();
|
|
++li) {
|
|
if ((*li)._is_active && (*li)._lens != (Lens *)NULL) {
|
|
geom_node->add_geom((*li)._lens->make_geometry());
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::hide_frustum
|
|
// Access: Published
|
|
// Description: Disables the drawing of the lens's frustum to aid in
|
|
// visualization.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
hide_frustum() {
|
|
if (_shown_frustum != (PandaNode *)NULL) {
|
|
remove_child(_shown_frustum);
|
|
_shown_frustum = (PandaNode *)NULL;
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::output
|
|
// Access: Public, Virtual
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
output(ostream &out) const {
|
|
PandaNode::output(out);
|
|
|
|
out << " (";
|
|
for (Lenses::const_iterator li = _lenses.begin();
|
|
li != _lenses.end();
|
|
++li) {
|
|
if ((*li)._is_active && (*li)._lens != (Lens *)NULL) {
|
|
out << " ";
|
|
(*li)._lens->output(out);
|
|
}
|
|
}
|
|
out << " )";
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::write
|
|
// Access: Public, Virtual
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
write(ostream &out, int indent_level) const {
|
|
PandaNode::write(out, indent_level);
|
|
|
|
for (Lenses::const_iterator li = _lenses.begin();
|
|
li != _lenses.end();
|
|
++li) {
|
|
if ((*li)._is_active && (*li)._lens != (Lens *)NULL) {
|
|
(*li)._lens->write(out, indent_level + 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::register_with_read_factory
|
|
// Access: Public, Static
|
|
// Description: Tells the BamReader how to create objects of type
|
|
// LensNode.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
register_with_read_factory() {
|
|
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::write_datagram
|
|
// Access: Public, Virtual
|
|
// Description: Writes the contents of this object to the datagram
|
|
// for shipping out to a Bam file.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
write_datagram(BamWriter *manager, Datagram &dg) {
|
|
PandaNode::write_datagram(manager, dg);
|
|
|
|
// For now, we only write out lens 0, simply because that's what we
|
|
// always have done. Should probably write out all lenses for the
|
|
// future.
|
|
manager->write_pointer(dg, get_lens(0));
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::complete_pointers
|
|
// Access: Public, Virtual
|
|
// Description: Receives an array of pointers, one for each time
|
|
// manager->read_pointer() was called in fillin().
|
|
// Returns the number of pointers processed.
|
|
////////////////////////////////////////////////////////////////////
|
|
int LensNode::
|
|
complete_pointers(TypedWritable **p_list, BamReader *manager) {
|
|
int pi = PandaNode::complete_pointers(p_list, manager);
|
|
set_lens(0, DCAST(Lens, p_list[pi++]));
|
|
return pi;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::make_from_bam
|
|
// Access: Protected, Static
|
|
// Description: This function is called by the BamReader's factory
|
|
// when a new object of type LensNode is encountered
|
|
// in the Bam file. It should create the LensNode
|
|
// and extract its information from the file.
|
|
////////////////////////////////////////////////////////////////////
|
|
TypedWritable *LensNode::
|
|
make_from_bam(const FactoryParams ¶ms) {
|
|
LensNode *node = new LensNode("");
|
|
DatagramIterator scan;
|
|
BamReader *manager;
|
|
|
|
parse_params(params, scan, manager);
|
|
node->fillin(scan, manager);
|
|
|
|
return node;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: LensNode::fillin
|
|
// Access: Protected
|
|
// Description: This internal function is called by make_from_bam to
|
|
// read in all of the relevant data from the BamFile for
|
|
// the new LensNode.
|
|
////////////////////////////////////////////////////////////////////
|
|
void LensNode::
|
|
fillin(DatagramIterator &scan, BamReader *manager) {
|
|
PandaNode::fillin(scan, manager);
|
|
|
|
manager->read_pointer(scan);
|
|
}
|