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open_toontown_panda3d/panda/src/pgraph/geomNode.cxx

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// Filename: geomNode.cxx
// Created by: drose (23Feb02)
//
////////////////////////////////////////////////////////////////////
//
// 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 "geomNode.h"
#include "geom.h"
#include "geomTransformer.h"
#include "sceneGraphReducer.h"
#include "accumulatedAttribs.h"
#include "colorAttrib.h"
#include "colorScaleAttrib.h"
#include "texMatrixAttrib.h"
#include "textureAttrib.h"
#include "bamReader.h"
#include "bamWriter.h"
#include "datagram.h"
#include "datagramIterator.h"
#include "indent.h"
#include "pset.h"
#include "config_pgraph.h"
#include "graphicsStateGuardianBase.h"
#include "boundingBox.h"
#include "config_mathutil.h"
TypeHandle GeomNode::_type_handle;
////////////////////////////////////////////////////////////////////
// Function: GeomNode::Constructor
// Access: Published
// Description:
////////////////////////////////////////////////////////////////////
GeomNode::
GeomNode(const string &name) :
PandaNode(name)
{
_preserved = preserve_geom_nodes;
// GeomNodes have a certain set of bits on by default.
set_into_collide_mask(get_default_collide_mask());
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::Copy Constructor
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
GeomNode::
GeomNode(const GeomNode &copy) :
PandaNode(copy),
_preserved(copy._preserved),
_cycler(copy._cycler)
{
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::Destructor
// Access: Public, Virtual
// Description:
////////////////////////////////////////////////////////////////////
GeomNode::
~GeomNode() {
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::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 *GeomNode::
make_copy() const {
return new GeomNode(*this);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::apply_attribs_to_vertices
// Access: Public, Virtual
// Description: Applies whatever attributes are specified in the
// AccumulatedAttribs object (and by the attrib_types
// bitmask) to the vertices on this node, if
// appropriate. If this node uses geom arrays like a
// GeomNode, the supplied GeomTransformer may be used to
// unify shared arrays across multiple different nodes.
//
// This is a generalization of xform().
////////////////////////////////////////////////////////////////////
void GeomNode::
apply_attribs_to_vertices(const AccumulatedAttribs &attribs, int attrib_types,
GeomTransformer &transformer) {
if (pgraph_cat.is_debug()) {
pgraph_cat.debug()
<< "Transforming geometry:\n";
attribs.write(pgraph_cat.debug(false), attrib_types, 2);
}
if ((attrib_types & SceneGraphReducer::TT_transform) != 0) {
if (!attribs._transform->is_identity()) {
transformer.transform_vertices(this, attribs._transform->get_mat());
}
}
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
GeomList::iterator gi;
PT(GeomList) geoms = cdata->modify_geoms();
// Iterate based on the number of geoms, not using STL iterators.
// This allows us to append to the list in the code below (which
// we might do when doublesiding polys) without visiting those new
// nodes during the traversal.
size_t num_geoms = geoms->size();
for (size_t i = 0; i < num_geoms; ++i) {
GeomEntry *entry = &(*geoms)[i];
PT(Geom) new_geom = entry->_geom.get_read_pointer()->make_copy();
AccumulatedAttribs geom_attribs = attribs;
entry->_state = geom_attribs.collect(entry->_state, attrib_types);
bool any_changed = false;
if ((attrib_types & SceneGraphReducer::TT_color) != 0) {
CPT(RenderAttrib) ra = geom_attribs._color;
int override = geom_attribs._color_override;
if (ra == (const RenderAttrib *)NULL) {
// If we don't have a color attrib, implicitly apply the
// "off" attrib. But use an override of -1, so we don't
// replace a color attrib already on the Geom state.
ra = ColorAttrib::make_off();
override = -1;
}
entry->_state = entry->_state->add_attrib(ra, override);
ra = entry->_state->get_attrib(ColorAttrib::get_class_slot());
const ColorAttrib *ca = DCAST(ColorAttrib, ra);
if (ca->get_color_type() != ColorAttrib::T_vertex) {
if (transformer.remove_column(new_geom, InternalName::get_color())) {
any_changed = true;
}
}
}
if ((attrib_types & SceneGraphReducer::TT_color_scale) != 0) {
if (geom_attribs._color_scale != (const RenderAttrib *)NULL) {
const ColorScaleAttrib *csa = DCAST(ColorScaleAttrib, geom_attribs._color_scale);
if (csa->get_scale() != LVecBase4f(1.0f, 1.0f, 1.0f, 1.0f)) {
// Now, if we have an "off" or "flat" color attribute, we
// simply modify the color attribute, and leave the
// vertices alone.
const RenderAttrib *ra = entry->_state->get_attrib(ColorAttrib::get_class_slot());
if (ra != (const RenderAttrib *)NULL) {
const ColorAttrib *ca = DCAST(ColorAttrib, ra);
if (ca->get_color_type() == ColorAttrib::T_off) {
entry->_state = entry->_state->set_attrib(ColorAttrib::make_vertex());
// ColorAttrib::T_off means the color scale becomes
// the new color.
entry->_state = entry->_state->set_attrib(ColorAttrib::make_flat(csa->get_scale()));
} else if (ca->get_color_type() == ColorAttrib::T_flat) {
// ColorAttrib::T_flat means the color scale modulates
// the specified color to produce a new color.
const Colorf &c1 = ca->get_color();
const LVecBase4f &c2 = csa->get_scale();
Colorf color(c1[0] * c2[0], c1[1] * c2[1],
c1[2] * c2[2], c1[3] * c2[3]);
entry->_state = entry->_state->set_attrib(ColorAttrib::make_flat(color));
} else {
// Otherwise, we have vertex color, and we just scale
// it normally.
if (transformer.transform_colors(new_geom, csa->get_scale())) {
any_changed = true;
}
}
}
}
}
}
if ((attrib_types & SceneGraphReducer::TT_tex_matrix) != 0) {
if (geom_attribs._tex_matrix != (const RenderAttrib *)NULL) {
// Determine which texture coordinate names are used more than
// once. This assumes we have discovered all of the textures
// that are in effect on the GeomNode; this may not be true if
// there is a texture that has been applied at a node above
// that from which we started the flatten operation, but
// caveat programmer.
NameCount name_count;
if (geom_attribs._texture != (RenderAttrib *)NULL) {
const TextureAttrib *ta = DCAST(TextureAttrib, geom_attribs._texture);
int num_on_stages = ta->get_num_on_stages();
for (int si = 0; si < num_on_stages; si++) {
TextureStage *stage = ta->get_on_stage(si);
const InternalName *name = stage->get_texcoord_name();
count_name(name_count, name);
}
}
const TexMatrixAttrib *tma =
DCAST(TexMatrixAttrib, geom_attribs._tex_matrix);
CPT(TexMatrixAttrib) new_tma = DCAST(TexMatrixAttrib, TexMatrixAttrib::make());
int num_stages = tma->get_num_stages();
for (int i = 0; i < num_stages; i++) {
TextureStage *stage = tma->get_stage(i);
InternalName *name = stage->get_texcoord_name();
if (get_name_count(name_count, name) > 1) {
// We can't transform these texcoords, since the name is
// used by more than one active stage.
new_tma = DCAST(TexMatrixAttrib, new_tma->add_stage(stage, tma->get_transform(stage)));
} else {
// It's safe to transform these texcoords; the name is
// used by no more than one active stage.
if (transformer.transform_texcoords(new_geom, name, name, tma->get_mat(stage))) {
any_changed = true;
}
}
}
if (!new_tma->is_empty()) {
entry->_state = entry->_state->add_attrib(new_tma);
}
}
}
if ((attrib_types & SceneGraphReducer::TT_other) != 0) {
entry->_state = geom_attribs._other->compose(entry->_state);
}
// We handle cull_face last, since that might involve
// duplicating the geom, and we'd also like to duplicate all of
// the changes we may have applied in the above.
if ((attrib_types & SceneGraphReducer::TT_cull_face) != 0) {
if (geom_attribs._cull_face != (const RenderAttrib *)NULL) {
const CullFaceAttrib *cfa = DCAST(CullFaceAttrib, geom_attribs._cull_face);
CullFaceAttrib::Mode mode = cfa->get_effective_mode();
switch (mode) {
case CullFaceAttrib::M_cull_none:
// Doublesided polys. Duplicate them.
{
bool has_normals = (new_geom->get_vertex_data()->has_column(InternalName::get_normal()));
if (has_normals) {
// If the geometry has normals, we have to duplicate
// it to reverse the normals on the duplicate copy.
PT(Geom) dup_geom = new_geom->reverse();
transformer.reverse_normals(dup_geom);
geoms->push_back(GeomEntry(dup_geom, entry->_state));
// The above push_back() operation might have
// invalidated our old pointer into the list, so we
// reassign it now.
entry = &(*geoms)[i];
} else {
// If there are no normals, we can just doubleside it in
// place. This is preferable because we can share vertices.
new_geom->doubleside_in_place();
any_changed = true;
}
}
break;
case CullFaceAttrib::M_cull_counter_clockwise:
// Reverse winding order.
new_geom->reverse_in_place();
transformer.reverse_normals(new_geom);
any_changed = true;
break;
default:
break;
}
}
}
if (any_changed) {
entry->_geom = new_geom;
}
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
if ((attrib_types & SceneGraphReducer::TT_apply_texture_color) != 0) {
transformer.apply_texture_colors(this, attribs._other);
}
transformer.register_vertices(this, false);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::xform
// Access: Public, Virtual
// Description: Transforms the contents of this node by the indicated
// matrix, if it means anything to do so. For most
// kinds of nodes, this does nothing.
//
// For a GeomNode, this does the right thing, but it is
// better to use a GeomTransformer instead, since it
// will share the new arrays properly between different
// GeomNodes.
////////////////////////////////////////////////////////////////////
void GeomNode::
xform(const LMatrix4f &mat) {
GeomTransformer transformer;
transformer.transform_vertices(this, mat);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::safe_to_flatten
// Access: Public, Virtual
// Description: Returns true if it is generally safe to flatten out
// this particular kind of PandaNode by duplicating
// instances (by calling dupe_for_flatten()), false
// otherwise (for instance, a Camera cannot be safely
// flattened, because the Camera pointer itself is
// meaningful).
////////////////////////////////////////////////////////////////////
bool GeomNode::
safe_to_flatten() const {
if (_preserved) {
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::safe_to_combine
// Access: Public, Virtual
// Description: Returns true if it is generally safe to combine this
// particular kind of PandaNode with other kinds of
// PandaNodes of compatible type, adding children or
// whatever. For instance, an LODNode should not be
// combined with any other PandaNode, because its set of
// children is meaningful.
////////////////////////////////////////////////////////////////////
bool GeomNode::
safe_to_combine() const {
if (_preserved) {
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::r_prepare_scene
// Access: Protected, Virtual
// Description: The recursive implementation of prepare_scene().
// Don't call this directly; call
// PandaNode::prepare_scene() or
// NodePath::prepare_scene() instead.
////////////////////////////////////////////////////////////////////
void GeomNode::
r_prepare_scene(const RenderState *state,
PreparedGraphicsObjects *prepared_objects,
Thread *current_thread) {
CDReader cdata(_cycler, current_thread);
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
CPT(RenderState) geom_state = state->compose((*gi)._state);
const RenderAttrib *attrib =
geom_state->get_attrib(TextureAttrib::get_class_slot());
if (attrib != (const RenderAttrib *)NULL) {
const TextureAttrib *ta;
DCAST_INTO_V(ta, attrib);
Texture *texture = ta->get_texture();
if (texture != (Texture *)NULL) {
texture->prepare(prepared_objects);
}
}
}
PandaNode::r_prepare_scene(state, prepared_objects, current_thread);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::combine_with
// Access: Public, Virtual
// Description: Collapses this node with the other node, if possible,
// and returns a pointer to the combined node, or NULL
// if the two nodes cannot safely be combined.
//
// The return value may be this, other, or a new node
// altogether.
//
// This function is called from GraphReducer::flatten(),
// and need not deal with children; its job is just to
// decide whether to collapse the two nodes and what the
// collapsed node should look like.
////////////////////////////////////////////////////////////////////
PandaNode *GeomNode::
combine_with(PandaNode *other) {
if (is_exact_type(get_class_type()) &&
other->is_exact_type(get_class_type())) {
// Two GeomNodes can combine by moving Geoms from one to the other.
GeomNode *gother = DCAST(GeomNode, other);
add_geoms_from(gother);
return this;
}
return PandaNode::combine_with(other);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::calc_tight_bounds
// Access: Public, Virtual
// Description: This is used to support
// NodePath::calc_tight_bounds(). It is not intended to
// be called directly, and it has nothing to do with the
// normal Panda bounding-volume computation.
//
// If the node contains any geometry, this updates
// min_point and max_point to enclose its bounding box.
// found_any is to be set true if the node has any
// geometry at all, or left alone if it has none. This
// method may be called over several nodes, so it may
// enter with min_point, max_point, and found_any
// already set.
////////////////////////////////////////////////////////////////////
CPT(TransformState) GeomNode::
calc_tight_bounds(LPoint3f &min_point, LPoint3f &max_point, bool &found_any,
const TransformState *transform, Thread *current_thread) const {
CPT(TransformState) next_transform =
PandaNode::calc_tight_bounds(min_point, max_point, found_any, transform,
current_thread);
const LMatrix4f &mat = next_transform->get_mat();
CDReader cdata(_cycler, current_thread);
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
CPT(Geom) geom = (*gi)._geom.get_read_pointer();
geom->calc_tight_bounds(min_point, max_point, found_any,
geom->get_vertex_data(current_thread)->animate_vertices(true, current_thread),
!next_transform->is_identity(), mat,
current_thread);
}
return next_transform;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::is_renderable
// Access: Public, Virtual
// Description: Returns true if there is some value to visiting this
// particular node during the cull traversal for any
// camera, false otherwise. This will be used to
// optimize the result of get_net_draw_show_mask(), so
// that any subtrees that contain only nodes for which
// is_renderable() is false need not be visited.
////////////////////////////////////////////////////////////////////
bool GeomNode::
is_renderable() const {
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::get_legal_collide_mask
// Access: Published, Virtual
// Description: Returns the subset of CollideMask bits that may be
// set for this particular type of PandaNode. For most
// nodes, this is 0; it doesn't make sense to set a
// CollideMask for most kinds of nodes.
//
// For nodes that can be collided with, such as GeomNode
// and CollisionNode, this returns all bits on.
////////////////////////////////////////////////////////////////////
CollideMask GeomNode::
get_legal_collide_mask() const {
return CollideMask::all_on();
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::add_geom
// Access: Published
// Description: Adds a new Geom to the node. The geom is given the
// indicated state (which may be
// RenderState::make_empty(), to completely inherit its
// state from the scene graph).
////////////////////////////////////////////////////////////////////
void GeomNode::
add_geom(Geom *geom, const RenderState *state) {
nassertv(geom != (Geom *)NULL);
nassertv(geom->check_valid());
nassertv(state != (RenderState *)NULL);
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
cdata->modify_geoms()->push_back(GeomEntry(geom, state));
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
mark_internal_bounds_stale();
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::add_geoms_from
// Access: Published
// Description: Copies the Geoms (and their associated RenderStates)
// from the indicated GeomNode into this one.
////////////////////////////////////////////////////////////////////
void GeomNode::
add_geoms_from(const GeomNode *other) {
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
CDStageReader cdata_other(other->_cycler, pipeline_stage, current_thread);
GeomList::const_iterator gi;
CPT(GeomList) other_geoms = cdata_other->get_geoms();
PT(GeomList) this_geoms = cdata->modify_geoms();
for (gi = other_geoms->begin(); gi != other_geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
nassertv(entry._geom.get_read_pointer()->check_valid());
this_geoms->push_back(entry);
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
mark_internal_bounds_stale();
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::set_geom
// Access: Public
// Description: Replaces the nth Geom of the node with a new pointer.
// There must already be a Geom in this slot.
//
// Note that if this method is called in a downstream
// stage (for instance, during cull or draw), then it
// will propagate the new list of Geoms upstream all the
// way to pipeline stage 0, which may step on changes
// that were made independently in pipeline stage 0.
// Use with caution.
////////////////////////////////////////////////////////////////////
void GeomNode::
set_geom(int n, Geom *geom) {
nassertv(geom != (Geom *)NULL);
nassertv(geom->check_valid());
CDWriter cdata(_cycler, true);
PT(GeomList) geoms = cdata->modify_geoms();
nassertv(n >= 0 && n < (int)geoms->size());
(*geoms)[n]._geom = geom;
mark_internal_bounds_stale();
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::check_valid
// Access: Published
// Description: Verifies that the each Geom within the GeomNode
// reference vertices that actually exist within its
// GeomVertexData. Returns true if the GeomNode appears
// to be valid, false otherwise.
////////////////////////////////////////////////////////////////////
bool GeomNode::
check_valid() const {
int num_geoms = get_num_geoms();
for (int i = 0; i < num_geoms; i++) {
const Geom *geom = get_geom(i);
if (!geom->check_valid()) {
return false;
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::decompose
// Access: Published
// Description: Calls decompose() on each Geom with the GeomNode.
// This decomposes higher-order primitive types, like
// triangle strips, into lower-order types like indexed
// triangles. Normally there is no reason to do this,
// but it can be useful as an early preprocessing step,
// to allow a later call to unify() to proceed more
// quickly.
//
// See also SceneGraphReducer::decompose(), which is the
// normal way this is called.
////////////////////////////////////////////////////////////////////
void GeomNode::
decompose() {
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
GeomList::iterator gi;
PT(GeomList) geoms = cdata->modify_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
GeomEntry &entry = (*gi);
nassertv(entry._geom.test_ref_count_integrity());
PT(Geom) geom = entry._geom.get_write_pointer();
geom->decompose_in_place();
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::unify
// Access: Published
// Description: Attempts to unify all of the Geoms contained within
// this node into a single Geom, or at least as few
// Geoms as possible. In turn, the individual
// GeomPrimitives contained within each resulting Geom
// are also unified. The goal is to reduce the number
// of GeomPrimitives within the node as far as possible.
// This may result in composite primitives, such as
// triangle strips and triangle fans, being decomposed
// into triangles. See also Geom::unify().
//
// max_indices represents the maximum number of indices
// that will be put in any one GeomPrimitive. If
// preserve_order is true, then the primitives will not
// be reordered during the operation, even if this
// results in a suboptimal result.
//
// In order for this to be successful, the primitives
// must reference the same GeomVertexData, have the same
// fundamental primitive type, and have compatible shade
// models.
////////////////////////////////////////////////////////////////////
void GeomNode::
unify(int max_indices, bool preserve_order) {
bool any_changed = false;
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
PT(GeomList) new_geoms = new GeomList;
// Try to unify each Geom with each preceding Geom. This is an n^2
// operation, but usually there are only a handful of Geoms to
// consider, so that's not a big deal.
GeomList::const_iterator gi;
CPT(GeomList) old_geoms = cdata->get_geoms();
for (gi = old_geoms->begin(); gi != old_geoms->end(); ++gi) {
const GeomEntry &old_entry = (*gi);
bool unified = false;
// Go from back to front, to minimize damage to the primitive ordering.
GeomList::reverse_iterator gj;
for (gj = new_geoms->rbegin(); gj != new_geoms->rend() && !unified; ++gj) {
GeomEntry &new_entry = (*gj);
if (old_entry._state == new_entry._state) {
// Both states match, so try to combine the primitives.
CPT(Geom) old_geom = old_entry._geom.get_read_pointer();
PT(Geom) new_geom = new_entry._geom.get_write_pointer();
if (new_geom->copy_primitives_from(old_geom)) {
// Successfully combined!
unified = true;
any_changed = true;
}
}
if (preserve_order) {
// If we're insisting on preserving the order, we can only
// attempt to merge with the tail of the list.
break;
}
}
if (!unified) {
// Couldn't unify this Geom with anything, so just add it to the
// output list.
new_geoms->push_back(old_entry);
}
}
// Done! We'll keep whatever's left in the output list.
cdata->set_geoms(new_geoms);
// Finally, go back through and unify the resulting geom(s).
GeomList::iterator wgi;
for (wgi = new_geoms->begin(); wgi != new_geoms->end(); ++wgi) {
GeomEntry &entry = (*wgi);
nassertv(entry._geom.test_ref_count_integrity());
PT(Geom) geom = entry._geom.get_write_pointer();
geom->unify_in_place(max_indices, preserve_order);
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
if (any_changed) {
mark_internal_bounds_stale();
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::write_geoms
// Access: Published
// Description: Writes a short description of all the Geoms in the
// node.
////////////////////////////////////////////////////////////////////
void GeomNode::
write_geoms(ostream &out, int indent_level) const {
CDReader cdata(_cycler);
write(out, indent_level);
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
indent(out, indent_level + 2)
<< *entry._geom.get_read_pointer() << " " << *entry._state << "\n";
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::write_verbose
// Access: Published
// Description: Writes a detailed description of all the Geoms in the
// node.
////////////////////////////////////////////////////////////////////
void GeomNode::
write_verbose(ostream &out, int indent_level) const {
CDReader cdata(_cycler);
write(out, indent_level);
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
CPT(Geom) geom = entry._geom.get_read_pointer();
indent(out, indent_level + 2)
<< *geom << " " << *entry._state << "\n";
geom->write(out, indent_level + 4);
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::output
// Access: Public, Virtual
// Description:
////////////////////////////////////////////////////////////////////
void GeomNode::
output(ostream &out) const {
// Accumulate the total set of RenderAttrib types that are applied
// to any of our Geoms, so we can output them too. The result will
// be the list of attrib types that might be applied to some Geoms,
// but not necessarily to all Geoms.
CDReader cdata(_cycler);
pset<TypeHandle> attrib_types;
GeomList::const_iterator gi;
CPT(RenderState) common = RenderState::make_empty();
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
common = common->compose(entry._state);
}
PandaNode::output(out);
out << " (" << geoms->size() << " geoms";
if (!common->is_empty()) {
out << ": " << *common;
}
out << ")";
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::is_geom_node
// Access: Public, Virtual
// Description: A simple downcast check. Returns true if this kind
// of node happens to inherit from GeomNode, false
// otherwise.
//
// This is provided as a a faster alternative to calling
// is_of_type(GeomNode::get_class_type()), since this
// test is so important to rendering.
////////////////////////////////////////////////////////////////////
bool GeomNode::
is_geom_node() const {
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::do_premunge
// Access: Public
// Description: Uses the indicated GSG to premunge the Geoms in this
// node to optimize them for eventual rendering. See
// SceneGraphReducer::premunge().
////////////////////////////////////////////////////////////////////
void GeomNode::
do_premunge(GraphicsStateGuardianBase *gsg,
const RenderState *node_state,
GeomTransformer &transformer) {
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
GeomList::iterator gi;
PT(GeomList) geoms = cdata->modify_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
GeomEntry &entry = (*gi);
CPT(RenderState) geom_state = node_state->compose(entry._state);
CPT(Geom) geom = entry._geom.get_read_pointer();
PT(GeomMunger) munger = gsg->get_geom_munger(geom_state, current_thread);
entry._geom = transformer.premunge_geom(geom, munger);
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::compute_internal_bounds
// Access: Protected, Virtual
// Description: Returns a newly-allocated BoundingVolume that
// represents the internal contents of the node. Should
// be overridden by PandaNode classes that contain
// something internally.
////////////////////////////////////////////////////////////////////
void GeomNode::
compute_internal_bounds(CPT(BoundingVolume) &internal_bounds,
int &internal_vertices,
int pipeline_stage,
Thread *current_thread) const {
int num_vertices = 0;
CDLockedStageReader cdata(_cycler, pipeline_stage, current_thread);
pvector<const BoundingVolume *> child_volumes;
pvector<CPT(BoundingVolume) > child_volumes_ref;
bool all_box = true;
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
child_volumes.reserve(geoms->size());
child_volumes_ref.reserve(geoms->size());
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
CPT(Geom) geom = entry._geom.get_read_pointer();
CPT(BoundingVolume) volume = geom->get_bounds();
if (!volume->is_empty()) {
child_volumes.push_back(volume);
child_volumes_ref.push_back(volume);
if (!volume->is_exact_type(BoundingBox::get_class_type())) {
all_box = false;
}
}
num_vertices += geom->get_nested_vertices();
}
PT(GeometricBoundingVolume) gbv;
if (bounds_type == BoundingVolume::BT_box ||
(bounds_type != BoundingVolume::BT_sphere && all_box)) {
// If all of the child volumes are a BoundingBox, then our volume
// is also a BoundingBox.
gbv = new BoundingBox;
} else {
// Otherwise, it's a sphere.
gbv = new BoundingSphere;
}
if (child_volumes.size() > 0) {
const BoundingVolume **child_begin = &child_volumes[0];
const BoundingVolume **child_end = child_begin + child_volumes.size();
((BoundingVolume *)gbv)->around(child_begin, child_end);
}
internal_bounds = gbv;
internal_vertices = num_vertices;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::register_with_read_factory
// Access: Public, Static
// Description: Tells the BamReader how to create objects of type
// GeomNode.
////////////////////////////////////////////////////////////////////
void GeomNode::
register_with_read_factory() {
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::write_datagram
// Access: Public, Virtual
// Description: Writes the contents of this object to the datagram
// for shipping out to a Bam file.
////////////////////////////////////////////////////////////////////
void GeomNode::
write_datagram(BamWriter *manager, Datagram &dg) {
PandaNode::write_datagram(manager, dg);
manager->write_cdata(dg, _cycler);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::finalize
// Access: Public, Virtual
// Description: Called by the BamReader to perform any final actions
// needed for setting up the object after all objects
// have been read and all pointers have been completed.
////////////////////////////////////////////////////////////////////
void GeomNode::
finalize(BamReader *manager) {
if (manager->get_file_minor_ver() < 14) {
// With version 6.14, we changed the default ColorAttrib
// behavior from make_vertex() to make_flat(). This means that
// every Geom that contains vertex colors now needs to have an
// explicit ColorAttrib::make_vertex() on its state.
// Since we shouldn't override a different ColorAttrib inherited
// from above, we create this new attrib with an override of -1.
CPT(InternalName) color = InternalName::get_color();
CPT(RenderAttrib) vertex_color = ColorAttrib::make_vertex();
Thread *current_thread = Thread::get_current_thread();
OPEN_ITERATE_CURRENT_AND_UPSTREAM(_cycler, current_thread) {
CDStageWriter cdata(_cycler, pipeline_stage, current_thread);
GeomList::iterator gi;
PT(GeomList) geoms = cdata->modify_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
GeomEntry &entry = (*gi);
CPT(Geom) geom = entry._geom.get_read_pointer();
// Force the various GeomVertexArrayFormat objects to finalize
// themselves. We have to do this before we can reliably call
// GeomVertexData::has_column().
CPT(GeomVertexData) vdata = geom->get_vertex_data(current_thread);
CPT(GeomVertexFormat) vformat = vdata->get_format();
for (int i = 0; i < vformat->get_num_arrays(); ++i) {
const GeomVertexArrayFormat *varray = vformat->get_array(i);
manager->finalize_now((GeomVertexArrayFormat *)varray);
}
if (vdata->has_column(color) &&
!entry._state->has_attrib(ColorAttrib::get_class_slot())) {
// We'll be reassigning the RenderState. Therefore, save it
// temporarily to increment its reference count.
PT(BamAuxData) aux_data = new BamAuxData;
aux_data->_hold_state = entry._state;
manager->set_aux_data((RenderState *)entry._state.p(), "hold_state", aux_data);
entry._state = entry._state->add_attrib(vertex_color, -1);
}
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::make_from_bam
// Access: Protected, Static
// Description: This function is called by the BamReader's factory
// when a new object of type GeomNode is encountered
// in the Bam file. It should create the GeomNode
// and extract its information from the file.
////////////////////////////////////////////////////////////////////
TypedWritable *GeomNode::
make_from_bam(const FactoryParams &params) {
GeomNode *node = new GeomNode("");
DatagramIterator scan;
BamReader *manager;
parse_params(params, scan, manager);
node->fillin(scan, manager);
if (manager->get_file_minor_ver() < 14) {
manager->register_finalize(node);
}
return node;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::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 GeomNode.
////////////////////////////////////////////////////////////////////
void GeomNode::
fillin(DatagramIterator &scan, BamReader *manager) {
PandaNode::fillin(scan, manager);
manager->read_cdata(scan, _cycler);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::CData::Copy Constructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
GeomNode::CData::
CData(const GeomNode::CData &copy) :
_geoms(copy._geoms)
{
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::CData::make_copy
// Access: Public, Virtual
// Description:
////////////////////////////////////////////////////////////////////
CycleData *GeomNode::CData::
make_copy() const {
return new CData(*this);
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::CData::write_datagram
// Access: Public, Virtual
// Description: Writes the contents of this object to the datagram
// for shipping out to a Bam file.
////////////////////////////////////////////////////////////////////
void GeomNode::CData::
write_datagram(BamWriter *manager, Datagram &dg) const {
CPT(GeomList) geoms = _geoms.get_read_pointer();
int num_geoms = geoms->size();
nassertv(num_geoms == (int)(PN_uint16)num_geoms);
dg.add_uint16(num_geoms);
GeomList::const_iterator gi;
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
manager->write_pointer(dg, entry._geom.get_read_pointer());
manager->write_pointer(dg, entry._state);
}
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::CData::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 GeomNode::CData::
complete_pointers(TypedWritable **p_list, BamReader *manager) {
int pi = CycleData::complete_pointers(p_list, manager);
// Get the geom and state pointers.
GeomList::iterator gi;
PT(GeomList) geoms = _geoms.get_write_pointer();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
GeomEntry &entry = (*gi);
entry._geom = DCAST(Geom, p_list[pi++]);
entry._state = DCAST(RenderState, p_list[pi++]);
}
return pi;
}
////////////////////////////////////////////////////////////////////
// Function: GeomNode::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 GeomNode.
////////////////////////////////////////////////////////////////////
void GeomNode::CData::
fillin(DatagramIterator &scan, BamReader *manager) {
int num_geoms = scan.get_uint16();
// Read the list of geoms and states. Push back a NULL for each one.
PT(GeomList) geoms = new GeomList;
geoms->reserve(num_geoms);
for (int i = 0; i < num_geoms; i++) {
manager->read_pointer(scan);
manager->read_pointer(scan);
geoms->push_back(GeomEntry(NULL, NULL));
}
_geoms = geoms;
}
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