239 lines
9.1 KiB
C++
239 lines
9.1 KiB
C++
// Filename: directionalLight.cxx
|
|
// Created by: mike (09Jan97)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
//
|
|
// 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 "directionalLight.h"
|
|
#include "orthographicLens.h"
|
|
#include "graphicsStateGuardianBase.h"
|
|
#include "bamWriter.h"
|
|
#include "bamReader.h"
|
|
#include "datagram.h"
|
|
#include "datagramIterator.h"
|
|
|
|
TypeHandle DirectionalLight::_type_handle;
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::CData::make_copy
|
|
// Access: Public, Virtual
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
CycleData *DirectionalLight::CData::
|
|
make_copy() const {
|
|
return new CData(*this);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::CData::write_datagram
|
|
// Access: Public, Virtual
|
|
// Description: Writes the contents of this object to the datagram
|
|
// for shipping out to a Bam file.
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::CData::
|
|
write_datagram(BamWriter *, Datagram &dg) const {
|
|
_specular_color.write_datagram(dg);
|
|
_point.write_datagram(dg);
|
|
_direction.write_datagram(dg);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::CData::fillin
|
|
// Access: Public, Virtual
|
|
// Description: This internal function is called by make_from_bam to
|
|
// read in all of the relevant data from the BamFile for
|
|
// the new Light.
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::CData::
|
|
fillin(DatagramIterator &scan, BamReader *) {
|
|
_specular_color.read_datagram(scan);
|
|
_point.read_datagram(scan);
|
|
_direction.read_datagram(scan);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::Constructor
|
|
// Access: Published
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
DirectionalLight::
|
|
DirectionalLight(const string &name) :
|
|
LightLensNode(name, new OrthographicLens())
|
|
{
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::Copy Constructor
|
|
// Access: Protected
|
|
// Description: Do not call the copy constructor directly; instead,
|
|
// use make_copy() or copy_subgraph() to make a copy of
|
|
// a node.
|
|
////////////////////////////////////////////////////////////////////
|
|
DirectionalLight::
|
|
DirectionalLight(const DirectionalLight ©) :
|
|
LightLensNode(copy),
|
|
_cycler(copy._cycler)
|
|
{
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::make_copy
|
|
// Access: Public, Virtual
|
|
// Description: Returns a newly-allocated PandaNode that is a shallow
|
|
// copy of this one. It will be a different pointer,
|
|
// but its internal data may or may not be shared with
|
|
// that of the original PandaNode. No children will be
|
|
// copied.
|
|
////////////////////////////////////////////////////////////////////
|
|
PandaNode *DirectionalLight::
|
|
make_copy() const {
|
|
return new DirectionalLight(*this);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::xform
|
|
// Access: Public, 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 DirectionalLight::
|
|
xform(const LMatrix4f &mat) {
|
|
LightLensNode::xform(mat);
|
|
CDWriter cdata(_cycler);
|
|
cdata->_point = cdata->_point * mat;
|
|
cdata->_direction = cdata->_direction * mat;
|
|
mark_viz_stale();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::write
|
|
// Access: Public, Virtual
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::
|
|
write(ostream &out, int indent_level) const {
|
|
indent(out, indent_level) << *this << ":\n";
|
|
indent(out, indent_level + 2)
|
|
<< "color " << get_color() << "\n";
|
|
indent(out, indent_level + 2)
|
|
<< "specular color " << get_specular_color() << "\n";
|
|
indent(out, indent_level + 2)
|
|
<< "direction " << get_direction() << "\n";
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::get_vector_to_light
|
|
// Access: Public, Virtual
|
|
// Description: Computes the vector from a particular vertex to this
|
|
// light. The exact vector depends on the type of light
|
|
// (e.g. point lights return a different result than
|
|
// directional lights).
|
|
//
|
|
// The input parameters are the vertex position in
|
|
// question, expressed in object space, and the matrix
|
|
// which converts from light space to object space. The
|
|
// result is expressed in object space.
|
|
//
|
|
// The return value is true if the result is successful,
|
|
// or false if it cannot be computed (e.g. for an
|
|
// ambient light).
|
|
////////////////////////////////////////////////////////////////////
|
|
bool DirectionalLight::
|
|
get_vector_to_light(LVector3f &result, const LPoint3f &,
|
|
const LMatrix4f &to_object_space) {
|
|
CDReader cdata(_cycler);
|
|
result = -(cdata->_direction * to_object_space);
|
|
|
|
return true;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::get_class_priority
|
|
// Access: Published, Virtual
|
|
// Description: Returns the relative priority associated with all
|
|
// lights of this class. This priority is used to order
|
|
// lights whose instance priority (get_priority()) is
|
|
// the same--the idea is that other things being equal,
|
|
// AmbientLights (for instance) are less important than
|
|
// DirectionalLights.
|
|
////////////////////////////////////////////////////////////////////
|
|
int DirectionalLight::
|
|
get_class_priority() const {
|
|
return (int)CP_directional_priority;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::bind
|
|
// Access: Public, Virtual
|
|
// Description:
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::
|
|
bind(GraphicsStateGuardianBase *gsg, const NodePath &light, int light_id) {
|
|
gsg->bind_light(this, light, light_id);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::register_with_read_factory
|
|
// Access: Public, Static
|
|
// Description: Tells the BamReader how to create objects of type
|
|
// DirectionalLight.
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::
|
|
register_with_read_factory() {
|
|
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::write_datagram
|
|
// Access: Public, Virtual
|
|
// Description: Writes the contents of this object to the datagram
|
|
// for shipping out to a Bam file.
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::
|
|
write_datagram(BamWriter *manager, Datagram &dg) {
|
|
LightLensNode::write_datagram(manager, dg);
|
|
manager->write_cdata(dg, _cycler);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::make_from_bam
|
|
// Access: Protected, Static
|
|
// Description: This function is called by the BamReader's factory
|
|
// when a new object of type DirectionalLight is encountered
|
|
// in the Bam file. It should create the DirectionalLight
|
|
// and extract its information from the file.
|
|
////////////////////////////////////////////////////////////////////
|
|
TypedWritable *DirectionalLight::
|
|
make_from_bam(const FactoryParams ¶ms) {
|
|
DirectionalLight *node = new DirectionalLight("");
|
|
DatagramIterator scan;
|
|
BamReader *manager;
|
|
|
|
parse_params(params, scan, manager);
|
|
node->fillin(scan, manager);
|
|
|
|
return node;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Function: DirectionalLight::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 DirectionalLight.
|
|
////////////////////////////////////////////////////////////////////
|
|
void DirectionalLight::
|
|
fillin(DatagramIterator &scan, BamReader *manager) {
|
|
LightLensNode::fillin(scan, manager);
|
|
manager->read_cdata(scan, _cycler);
|
|
}
|