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open_toontown_panda3d/panda/src/pgraph/geomNode.cxx

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/**
* 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."
*
* @file geomNode.cxx
* @author drose
* @date 2002-02-23
*/
#include "geomNode.h"
#include "geom.h"
#include "geomTransformer.h"
#include "sceneGraphReducer.h"
#include "stateMunger.h"
#include "accumulatedAttribs.h"
#include "colorAttrib.h"
#include "colorScaleAttrib.h"
#include "cullFaceAttrib.h"
#include "texMatrixAttrib.h"
#include "textureAttrib.h"
#include "shaderAttrib.h"
#include "bamReader.h"
#include "bamWriter.h"
#include "cullableObject.h"
#include "cullHandler.h"
#include "cullTraverser.h"
#include "cullTraverserData.h"
#include "datagram.h"
#include "datagramIterator.h"
#include "indent.h"
#include "pset.h"
#include "config_pgraph.h"
#include "graphicsStateGuardianBase.h"
#include "boundingBox.h"
#include "boundingSphere.h"
#include "config_mathutil.h"
#include "preparedGraphicsObjects.h"
bool allow_flatten_color = ConfigVariableBool
("allow-flatten-color", false,
PRC_DESC("allows color to always be flattened to vertices"));
TypeHandle GeomNode::_type_handle;
/**
*
*/
GeomNode::
GeomNode(const std::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());
}
/**
*
*/
GeomNode::
GeomNode(const GeomNode &copy) :
PandaNode(copy),
_preserved(copy._preserved),
_cycler(copy._cycler)
{
}
/**
*
*/
GeomNode::
~GeomNode() {
}
/**
* 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);
}
/**
* 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);
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;
if (ra != nullptr) {
int override = geom_attribs._color_override;
entry->_state = entry->_state->add_attrib(ra, override);
}
ra = entry->_state->get_attrib_def(ColorAttrib::get_class_slot());
CPT (ColorAttrib) ca = DCAST(ColorAttrib, ra);
if (ca->get_color_type() != ColorAttrib::T_vertex) {
if(allow_flatten_color) {
if(transformer.set_color(new_geom, ca->get_color())) {
any_changed = true;
entry->_state = entry->_state->set_attrib(ColorAttrib::make_vertex());
}
} else {
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 != nullptr) {
CPT(ColorScaleAttrib) csa = DCAST(ColorScaleAttrib, geom_attribs._color_scale);
if (csa->get_scale() != LVecBase4(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.
CPT(RenderAttrib) ra = entry->_state->get_attrib_def(ColorAttrib::get_class_slot());
CPT(ColorAttrib) ca = DCAST(ColorAttrib, ra);
if(allow_flatten_color) {
if (transformer.transform_colors(new_geom, csa->get_scale())) {
any_changed = true;
}
} else {
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 LColor &c1 = ca->get_color();
const LVecBase4 &c2 = csa->get_scale();
LColor 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;
}
entry->_state = entry->_state->set_attrib(ColorAttrib::make_vertex());
}
}
}
}
}
if ((attrib_types & SceneGraphReducer::TT_tex_matrix) != 0) {
if (geom_attribs._tex_matrix != nullptr) {
// 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 != nullptr) {
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 != nullptr) {
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);
}
/**
* 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 LMatrix4 &mat) {
GeomTransformer transformer;
transformer.transform_vertices(this, mat);
}
/**
* 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;
}
/**
* 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;
}
/**
* 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(GraphicsStateGuardianBase *gsg, const RenderState *node_state,
GeomTransformer &transformer, Thread *current_thread) {
PreparedGraphicsObjects *prepared_objects = gsg->get_prepared_objects();
CDReader cdata(_cycler, current_thread);
GeomList::const_iterator gi;
CPT(GeomList) geoms = cdata->get_geoms();
for (gi = geoms->begin(); gi != geoms->end(); ++gi) {
const GeomEntry &entry = (*gi);
CPT(RenderState) geom_state = node_state->compose(entry._state);
CPT(Geom) geom = entry._geom.get_read_pointer();
// Munge the geom as required by the GSG.
PT(GeomMunger) munger = gsg->get_geom_munger(geom_state, current_thread);
geom = transformer.premunge_geom(geom, munger);
// Prepare each of the vertex arrays in the munged Geom.
CPT(GeomVertexData) vdata = geom->get_animated_vertex_data(false, current_thread);
GeomVertexDataPipelineReader vdata_reader(vdata, current_thread);
int num_arrays = vdata_reader.get_num_arrays();
for (int i = 0; i < num_arrays; ++i) {
CPT(GeomVertexArrayData) array = vdata_reader.get_array(i);
prepared_objects->enqueue_vertex_buffer((GeomVertexArrayData *)array.p());
}
// And also each of the index arrays.
int num_primitives = geom->get_num_primitives();
for (int i = 0; i < num_primitives; ++i) {
CPT(GeomPrimitive) prim = geom->get_primitive(i);
prepared_objects->enqueue_index_buffer((GeomPrimitive *)prim.p());
}
if (munger->is_of_type(StateMunger::get_class_type())) {
StateMunger *state_munger = (StateMunger *)munger.p();
geom_state = state_munger->munge_state(geom_state);
}
// And now prepare each of the textures.
const TextureAttrib *ta;
if (geom_state->get_attrib(ta)) {
int num_stages = ta->get_num_on_stages();
for (int i = 0; i < num_stages; ++i) {
Texture *texture = ta->get_on_texture(ta->get_on_stage(i));
// TODO: prepare the sampler states, if specified.
if (texture != nullptr) {
prepared_objects->enqueue_texture(texture);
}
}
}
// As well as the shaders.
const ShaderAttrib *sa;
if (geom_state->get_attrib(sa)) {
Shader *shader = (Shader *)sa->get_shader();
if (shader != nullptr) {
prepared_objects->enqueue_shader(shader);
}
// TODO: prepare the shader inputs.
}
}
PandaNode::r_prepare_scene(gsg, node_state, transformer, current_thread);
}
/**
* 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);
}
/**
* 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(LPoint3 &min_point, LPoint3 &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 LMatrix4 &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_animated_vertex_data(true, current_thread),
!next_transform->is_identity(), mat,
current_thread);
}
return next_transform;
}
/**
* 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;
}
/**
* Adds the node's contents to the CullResult we are building up during the
* cull traversal, so that it will be drawn at render time. For most nodes
* other than GeomNodes, this is a do-nothing operation.
*/
void GeomNode::
add_for_draw(CullTraverser *trav, CullTraverserData &data) {
trav->_geom_nodes_pcollector.add_level(1);
if (pgraph_cat.is_spam()) {
pgraph_cat.spam()
<< "Found " << *this << " in state " << *data._state
<< " draw_mask = " << data._draw_mask << "\n";
}
// Get all the Geoms, with no decalling.
Geoms geoms = get_geoms(trav->get_current_thread());
int num_geoms = geoms.get_num_geoms();
trav->_geoms_pcollector.add_level(num_geoms);
CPT(TransformState) internal_transform = data.get_internal_transform(trav);
for (int i = 0; i < num_geoms; i++) {
CPT(Geom) geom = geoms.get_geom(i);
if (geom->is_empty()) {
continue;
}
CPT(RenderState) state = data._state->compose(geoms.get_geom_state(i));
if (state->has_cull_callback() && !state->cull_callback(trav, data)) {
// Cull.
continue;
}
// Cull the Geom bounding volume against the view frustum andor the cull
// planes. Don't bother unless we've got more than one Geom, since
// otherwise the bounding volume of the GeomNode is (probably) the same as
// that of the one Geom, and we've already culled against that.
if (num_geoms > 1) {
if (data._view_frustum != nullptr) {
// Cull the individual Geom against the view frustum.
CPT(BoundingVolume) geom_volume = geom->get_bounds();
const GeometricBoundingVolume *geom_gbv =
DCAST(GeometricBoundingVolume, geom_volume);
int result = data._view_frustum->contains(geom_gbv);
if (result == BoundingVolume::IF_no_intersection) {
// Cull this Geom.
continue;
}
}
if (!data._cull_planes->is_empty()) {
// Also cull the Geom against the cull planes.
CPT(BoundingVolume) geom_volume = geom->get_bounds();
const GeometricBoundingVolume *geom_gbv =
DCAST(GeometricBoundingVolume, geom_volume);
int result;
data._cull_planes->do_cull(result, state, geom_gbv);
if (result == BoundingVolume::IF_no_intersection) {
// Cull.
continue;
}
}
}
CullableObject *object =
new CullableObject(std::move(geom), std::move(state), internal_transform);
trav->get_cull_handler()->record_object(object, trav);
}
}
/**
* 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();
}
/**
* 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 != nullptr);
nassertv(geom->check_valid());
nassertv(state != nullptr);
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();
}
/**
* 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();
}
/**
* 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 != nullptr);
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();
}
/**
* 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;
}
/**
* 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);
}
/**
* 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();
}
}
/**
* Writes a short description of all the Geoms in the node.
*/
void GeomNode::
write_geoms(std::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";
}
}
/**
* Writes a detailed description of all the Geoms in the node.
*/
void GeomNode::
write_verbose(std::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);
}
}
/**
*
*/
void GeomNode::
output(std::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 << ")";
}
/**
* 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;
}
/**
* 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);
}
/**
* Recursively calls Geom::mark_bounds_stale() on every Geom at this node and
* below.
*/
void GeomNode::
r_mark_geom_bounds_stale(Thread *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);
entry._geom.get_read_pointer()->mark_bounds_stale();
}
}
CLOSE_ITERATE_CURRENT_AND_UPSTREAM(_cycler);
mark_internal_bounds_stale();
PandaNode::r_mark_geom_bounds_stale(current_thread);
}
/**
* 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;
BoundingVolume::BoundsType btype = get_bounds_type();
if (btype == BoundingVolume::BT_default) {
btype = bounds_type;
}
if (btype == BoundingVolume::BT_box ||
(btype != 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;
}
/**
* 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);
}
/**
* 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);
}
/**
* 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 (size_t 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);
}
}
/**
* 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;
}
/**
* 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);
}
/**
*
*/
GeomNode::CData::
CData(const GeomNode::CData &copy) :
_geoms(copy._geoms)
{
}
/**
*
*/
CycleData *GeomNode::CData::
make_copy() const {
return new CData(*this);
}
/**
* 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)(uint16_t)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);
}
}
/**
* 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;
}
/**
* 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(nullptr, nullptr));
}
_geoms = geoms;
}
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