Specifies how atmospheric fog effects are applied to geometry. More...
#include "fog.h"
Public Types | |
enum | Mode { M_linear, M_exponential, M_exponential_squared } |
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enum | FancyBits { FB_transform = 0x0001, FB_state = 0x0002, FB_effects = 0x0004, FB_tag = 0x0010, FB_draw_mask = 0x0020, FB_cull_callback = 0x0040 } |
typedef bool | SceneRootFunc (const PandaNode *) |
enum | UnexpectedChange { UC_parents = 0x001, UC_children = 0x002, UC_transform = 0x004, UC_state = 0x008, UC_draw_mask = 0x010 } |
Public Member Functions | |
Fog (const string &name) | |
void | adjust_to_camera (const TransformState *camera_transform) |
This function is intended to be called by the cull traverser to compute the appropriate camera-relative onset and opaque distances, based on the fog node's position within the scene graph (if linear fog is in effect). More... | |
virtual TypeHandle | force_init_type () |
const LColor & | get_color () const |
Returns the color of the fog. More... | |
PN_stdfloat | get_exp_density () const |
Returns the density of the fog for exponential calculations. More... | |
const LPoint3 & | get_linear_onset_point () const |
Returns the point in space at which the fog begins. More... | |
const LPoint3 & | get_linear_opaque_point () const |
Returns the point in space at which the fog completely obscures geometry. More... | |
void | get_linear_range (PN_stdfloat &onset, PN_stdfloat &opaque) |
Retrieves the current onset and offset ranges. More... | |
Mode | get_mode () const |
virtual TypeHandle | get_type () const |
virtual PandaNode * | make_copy () const |
Returns a newly-allocated Node that is a shallow copy of this one. More... | |
void | output (ostream &out) const |
void | set_color (PN_stdfloat r, PN_stdfloat g, PN_stdfloat b) |
Sets the color of the fog. More... | |
void | set_color (const LColor &color) |
Sets the color of the fog. More... | |
void | set_exp_density (PN_stdfloat exp_density) |
Sets the density of the fog for exponential calculations. More... | |
void | set_linear_fallback (PN_stdfloat angle, PN_stdfloat onset, PN_stdfloat opaque) |
Fog effects are traditionally defined in camera-relative space, but the Panda Fog node has a special mode in which it can define a linear fog effect in an arbitrary coordinate space. More... | |
void | set_linear_onset_point (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
Specifies the point in space at which the fog begins. More... | |
void | set_linear_onset_point (const LPoint3 &linear_onset_point) |
Specifies the point in space at which the fog begins. More... | |
void | set_linear_opaque_point (const LPoint3 &linear_opaque_point) |
Specifies the point in space at which the fog completely obscures geometry. More... | |
void | set_linear_opaque_point (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
Specifies the point in space at which the fog completely obscures geometry. More... | |
void | set_linear_range (PN_stdfloat onset, PN_stdfloat opaque) |
Specifies the effects of the fog in linear distance units. More... | |
void | set_mode (Mode mode) |
Specifies the computation that is used to determine the fog effect. More... | |
virtual void | write_datagram (BamWriter *manager, Datagram &dg) |
Writes the contents of this object to the datagram for shipping out to a Bam file. More... | |
virtual void | xform (const LMatrix4 &mat) |
Transforms the contents of this node by the indicated matrix, if it means anything to do so. More... | |
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PandaNode (const string &name) | |
void | add_child (PandaNode *child_node, int sort=0, Thread *current_thread=Thread::get_current_thread()) |
Adds a new child to the node. More... | |
virtual void | add_for_draw (CullTraverser *trav, CullTraverserData &data) |
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. More... | |
void | add_stashed (PandaNode *child_node, int sort=0, Thread *current_thread=Thread::get_current_thread()) |
Adds a new child to the node, directly as a stashed child. More... | |
void | adjust_draw_mask (DrawMask show_mask, DrawMask hide_mask, DrawMask clear_mask) |
Adjusts the hide/show bits of this particular node. More... | |
virtual void | apply_attribs_to_vertices (const AccumulatedAttribs &attribs, int attrib_types, GeomTransformer &transformer) |
Applies whatever attributes are specified in the AccumulatedAttribs object (and by the attrib_types bitmask) to the vertices on this node, if appropriate. More... | |
virtual Light * | as_light () |
Cross-casts the node to a Light pointer, if it is one of the four kinds of Light nodes, or returns NULL if it is not. More... | |
void | clear_attrib (TypeHandle type) |
Removes the render attribute of the given type from this node. More... | |
void | clear_attrib (int slot) |
Removes the render attribute of the given type from this node. More... | |
void | clear_bounds () |
Reverses the effect of a previous call to set_bounds(), and allows the node's bounding volume to be automatically computed once more based on the contents of the node. More... | |
void | clear_effect (TypeHandle type) |
Removes the render effect of the given type from this node. More... | |
void | clear_effects (Thread *current_thread=Thread::get_current_thread()) |
Resets this node to have no render effects. More... | |
void | clear_state (Thread *current_thread=Thread::get_current_thread()) |
Resets this node to leave the render state alone. More... | |
void | clear_tag (const string &key, Thread *current_thread=Thread::get_current_thread()) |
Removes the value defined for this key on this particular node. More... | |
void | clear_transform (Thread *current_thread=Thread::get_current_thread()) |
Resets the transform on this node to the identity transform. More... | |
void | clear_unexpected_change (unsigned int flags) |
Sets one or more of the PandaNode::UnexpectedChange bits off, indicating that the corresponding property may once again change on this node. More... | |
virtual PandaNode * | combine_with (PandaNode *other) |
Collapses this PandaNode with the other PandaNode, if possible, and returns a pointer to the combined PandaNode, or NULL if the two PandaNodes cannot safely be combined. More... | |
int | compare_tags (const PandaNode *other) const |
Returns a number less than 0, 0, or greater than 0, to indicate the similarity of tags between this node and the other one. More... | |
void | copy_all_properties (PandaNode *other) |
Copies the TransformState, RenderState, RenderEffects, tags, Python tags, and the show/hide state from the other node onto this one. More... | |
void | copy_children (PandaNode *other, Thread *current_thread=Thread::get_current_thread()) |
Makes another instance of all the children of the other node, copying them to this node. More... | |
void | copy_tags (PandaNode *other) |
Copies all of the tags stored on the other node onto this node. More... | |
int | count_num_descendants () const |
Returns the number of nodes at and below this level. More... | |
virtual | CPT (TransformState) calc_tight_bounds(LPoint3 &min_point |
CPT (RenderAttrib) get_attrib(TypeHandle type) const | |
CPT (RenderAttrib) get_attrib(int slot) const | |
CPT (RenderEffect) get_effect(TypeHandle type) const | |
CPT (RenderState) get_state(Thread *current_thread | |
CPT (RenderEffects) get_effects(Thread *current_thread | |
CPT (TransformState) get_transform(Thread *current_thread | |
CPT (TransformState) get_prev_transform(Thread *current_thread | |
CPT (RenderAttrib) get_off_clip_planes(Thread *current_thread | |
CPT (BoundingVolume) get_bounds(Thread *current_thread | |
CPT (BoundingVolume) get_bounds(UpdateSeq &seq | |
CPT (BoundingVolume) get_internal_bounds(Thread *current_thread | |
virtual bool | cull_callback (CullTraverser *trav, CullTraverserData &data) |
This function will be called during the cull traversal to perform any additional operations that should be performed at cull time. More... | |
virtual PandaNode * | dupe_for_flatten () const |
This is similar to make_copy(), but it makes a copy for the specific purpose of flatten. More... | |
int | find_child (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
Returns the index of the indicated child node, if it is a child, or -1 if it is not. More... | |
int | find_parent (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
Returns the index of the indicated parent node, if it is a parent, or -1 if it is not. More... | |
int | find_stashed (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
Returns the index of the indicated stashed node, if it is a stashed child, or -1 if it is not. More... | |
BoundingVolume::BoundsType | get_bounds_type () const |
Returns the bounding volume type set with set_bounds_type(). More... | |
PandaNode * | get_child (int n, Thread *current_thread=Thread::get_current_thread()) const |
Returns the nth child node of this node. More... | |
int | get_child_sort (int n, Thread *current_thread=Thread::get_current_thread()) const |
Returns the sort index of the nth child node of this node (that is, the number that was passed to add_child()). More... | |
Children | get_children (Thread *current_thread=Thread::get_current_thread()) const |
Returns an object that can be used to walk through the list of children of the node. More... | |
DrawMask | get_draw_control_mask () const |
Returns the set of bits in draw_show_mask that are considered meaningful. More... | |
DrawMask | get_draw_show_mask () const |
Returns the hide/show bits of this particular node. More... | |
int | get_fancy_bits (Thread *current_thread=Thread::get_current_thread()) const |
Returns the union of all of the enum FancyBits values corresponding to the various "fancy" attributes that are set on the node. More... | |
virtual int | get_first_visible_child () const |
Returns the index number of the first visible child of this node, or a number >= get_num_children() if there are no visible children of this node. More... | |
int | get_internal_vertices (Thread *current_thread=Thread::get_current_thread()) const |
CollideMask | get_into_collide_mask () const |
Returns the "into" collide mask for this node. More... | |
virtual CollideMask | get_legal_collide_mask () const |
Returns the subset of CollideMask bits that may be set for this particular type of PandaNode. More... | |
int | get_nested_vertices (Thread *current_thread=Thread::get_current_thread()) const |
Returns the total number of vertices that will be rendered by this node and all of its descendents. More... | |
CollideMask | get_net_collide_mask (Thread *current_thread=Thread::get_current_thread()) const |
Returns the union of all into_collide_mask() values set at CollisionNodes at this level and below. More... | |
DrawMask | get_net_draw_control_mask () const |
Returns the set of bits in get_net_draw_show_mask() that have been explicitly set via adjust_draw_mask(), rather than implicitly inherited. More... | |
DrawMask | get_net_draw_show_mask () const |
Returns the union of all draw_show_mask values–of renderable nodes only–at this level and below. More... | |
virtual int | get_next_visible_child (int n) const |
Returns the index number of the next visible child of this node following the indicated child, or a number >= get_num_children() if there are no more visible children of this node. More... | |
int | get_num_children (Thread *current_thread=Thread::get_current_thread()) const |
Returns the number of child nodes this node has. More... | |
int | get_num_parents (Thread *current_thread=Thread::get_current_thread()) const |
Returns the number of parent nodes this node has. More... | |
int | get_num_stashed (Thread *current_thread=Thread::get_current_thread()) const |
Returns the number of stashed nodes this node has. More... | |
PandaNode * | get_parent (int n, Thread *current_thread=Thread::get_current_thread()) const |
Returns the nth parent node of this node. More... | |
Parents | get_parents (Thread *current_thread=Thread::get_current_thread()) const |
Returns an object that can be used to walk through the list of parents of the node, similar to get_children() and get_stashed(). More... | |
PandaNode * | get_stashed (int n, Thread *current_thread=Thread::get_current_thread()) const |
Returns the nth stashed child of this node. More... | |
Stashed | get_stashed (Thread *current_thread=Thread::get_current_thread()) const |
Returns an object that can be used to walk through the list of children of the node. More... | |
int | get_stashed_sort (int n, Thread *current_thread=Thread::get_current_thread()) const |
Returns the sort index of the nth stashed node of this node (that is, the number that was passed to add_child()). More... | |
string | get_tag (const string &key, Thread *current_thread=Thread::get_current_thread()) const |
Retrieves the user-defined value that was previously set on this node for the particular key, if any. More... | |
void | get_tag_keys (vector_string &keys) const |
Fills the given vector up with the list of tags on this PandaNode. More... | |
unsigned int | get_unexpected_change (unsigned int flags) const |
Returns nonzero if any of the bits in the input parameter are set on this node, or zero if none of them are set. More... | |
virtual int | get_unsafe_to_apply_attribs () const |
Returns the union of all attributes from SceneGraphReducer::AttribTypes that may not safely be applied to the vertices of this node. More... | |
virtual int | get_visible_child () const |
Returns the index number of the currently visible child of this node. More... | |
bool | has_attrib (TypeHandle type) const |
Returns true if there is a render attribute of the indicated type defined on this node, or false if there is not. More... | |
bool | has_attrib (int slot) const |
Returns true if there is a render attribute of the indicated type defined on this node, or false if there is not. More... | |
bool | has_dirty_prev_transform () const |
Returns true if this node has the _dirty_prev_transform flag set, which indicates its _prev_transform is different from its _transform value (in pipeline stage 0). More... | |
bool | has_effect (TypeHandle type) const |
Returns true if there is a render effect of the indicated type defined on this node, or false if there is not. More... | |
virtual bool | has_selective_visibility () const |
Should be overridden by derived classes to return true if this kind of node has some restrictions on the set of children that should be rendered. More... | |
virtual bool | has_single_child_visibility () const |
Should be overridden by derived classes to return true if this kind of node has the special property that just one of its children is visible at any given time, and furthermore that the particular visible child can be determined without reference to any external information (such as a camera). More... | |
bool | has_tag (const string &key, Thread *current_thread=Thread::get_current_thread()) const |
Returns true if a value has been defined on this node for the particular key (even if that value is the empty string), or false if no value has been set. More... | |
bool | has_tags () const |
Returns true if the node has any tags (or any Python tags) at all, false if it has none. More... | |
virtual bool | is_ambient_light () const |
Returns true if this is an AmbientLight, false if it is not a light, or it is some other kind of light. More... | |
bool | is_bounds_stale () const |
Returns true if the bounding volume of this node is stale and will be implicitly recomputed at the next call to get_bounds(), or false if it is fresh and need not be recomputed. More... | |
virtual bool | is_collision_node () const |
A simple downcast check. More... | |
bool | is_final (Thread *current_thread=Thread::get_current_thread()) const |
Returns the current state of the "final" flag. More... | |
virtual bool | is_geom_node () const |
A simple downcast check. More... | |
virtual bool | is_lod_node () const |
A simple downcast check. More... | |
bool | is_overall_hidden () const |
Returns true if the node has been hidden to all cameras by clearing its overall bit. More... | |
virtual bool | is_renderable () const |
Returns true if there is some value to visiting this particular node during the cull traversal for any camera, false otherwise. More... | |
bool | is_scene_root () const |
Returns true if this particular node is known to be the render root of some active DisplayRegion associated with the global GraphicsEngine, false otherwise. More... | |
bool | is_under_scene_root () const |
Returns true if this particular node is in a live scene graph: that is, it is a child or descendent of a node that is itself a scene root. More... | |
void | list_tags (ostream &out, const string &separator="\n") const |
Writes a list of all the tag keys assigned to the node to the indicated stream. More... | |
void | ls (ostream &out, int indent_level) const |
Lists all the nodes at and below the current path hierarchically. More... | |
MAKE_SEQ (get_parents, get_num_parents, get_parent) | |
MAKE_SEQ (get_children, get_num_children, get_child) | |
MAKE_SEQ (get_stashed, get_num_stashed, get_stashed) | |
void | mark_bounds_stale (Thread *current_thread=Thread::get_current_thread()) const |
Indicates that the bounding volume, or something that influences the bounding volume (or any of the other things stored in CData, like net_collide_mask), may have changed for this node, and that it must be recomputed. More... | |
void | mark_internal_bounds_stale (Thread *current_thread=Thread::get_current_thread()) |
Should be called by a derived class to mark the internal bounding volume stale, so that compute_internal_bounds() will be called when the bounding volume is next requested. More... | |
void | prepare_scene (GraphicsStateGuardianBase *gsg, const RenderState *node_state) |
Walks through the scene graph beginning at this node, and does whatever initialization is required to render the scene properly with the indicated GSG. More... | |
virtual bool | preserve_name () const |
Returns true if the node's name has extrinsic meaning and must be preserved across a flatten operation, false otherwise. More... | |
PT (PandaNode) copy_subgraph(Thread *current_thread | |
virtual void | r_prepare_scene (GraphicsStateGuardianBase *gsg, const RenderState *node_state, GeomTransformer &transformer, Thread *current_thread) |
The recursive implementation of prepare_scene(). More... | |
void | remove_all_children (Thread *current_thread=Thread::get_current_thread()) |
Removes all the children from the node at once, including stashed children. More... | |
void | remove_child (int child_index, Thread *current_thread=Thread::get_current_thread()) |
Removes the nth child from the node. More... | |
bool | remove_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
Removes the indicated child from the node. More... | |
void | remove_stashed (int child_index, Thread *current_thread=Thread::get_current_thread()) |
Removes the nth stashed child from the node. More... | |
bool | replace_child (PandaNode *orig_child, PandaNode *new_child, Thread *current_thread=Thread::get_current_thread()) |
Searches for the orig_child node in the node's list of children, and replaces it with the new_child instead. More... | |
void | replace_node (PandaNode *other) |
Inserts this node into the scene graph in place of the other one, and removes the other node. More... | |
void | reset_prev_transform (Thread *current_thread=Thread::get_current_thread()) |
Resets the transform that represents this node's "previous" position to the same as the current transform. More... | |
virtual bool | safe_to_combine () const |
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. More... | |
virtual bool | safe_to_combine_children () const |
Returns true if it is generally safe to combine the children of this PandaNode with each other. More... | |
virtual bool | safe_to_flatten () const |
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). More... | |
virtual bool | safe_to_flatten_below () const |
Returns true if a flatten operation may safely continue past this node, or false if nodes below this node may not be molested. More... | |
virtual bool | safe_to_modify_transform () const |
Returns true if it is safe to automatically adjust the transform on this kind of node. More... | |
virtual bool | safe_to_transform () const |
Returns true if it is generally safe to transform this particular kind of PandaNode by calling the xform() method, false otherwise. More... | |
void | set_attrib (const RenderAttrib *attrib, int override=0) |
Adds the indicated render attribute to the scene graph on this node. More... | |
void | set_bound (const BoundingVolume *volume) |
Deprecated. More... | |
void | set_bounds (const BoundingVolume *volume) |
Resets the bounding volume so that it is the indicated volume. More... | |
void | set_bounds_type (BoundingVolume::BoundsType bounds_type) |
Specifies the desired type of bounding volume that will be created for this node. More... | |
void | set_effect (const RenderEffect *effect) |
Adds the indicated render effect to the scene graph on this node. More... | |
void | set_effects (const RenderEffects *effects, Thread *current_thread=Thread::get_current_thread()) |
Sets the complete RenderEffects that will be applied this node. More... | |
void | set_final (bool flag) |
Sets the "final" flag on this PandaNode. More... | |
void | set_into_collide_mask (CollideMask mask) |
Sets the "into" CollideMask. More... | |
void | set_overall_hidden (bool overall_hidden) |
Sets or clears the hidden flag. More... | |
void | set_prev_transform (const TransformState *transform, Thread *current_thread=Thread::get_current_thread()) |
Sets the transform that represents this node's "previous" position, one frame ago, for the purposes of detecting motion for accurate collision calculations. More... | |
void | set_state (const RenderState *state, Thread *current_thread=Thread::get_current_thread()) |
Sets the complete RenderState that will be applied to all nodes at this level and below. More... | |
void | set_tag (const string &key, const string &value, Thread *current_thread=Thread::get_current_thread()) |
Associates a user-defined value with a user-defined key which is stored on the node. More... | |
void | set_transform (const TransformState *transform, Thread *current_thread=Thread::get_current_thread()) |
Sets the transform that will be applied to this node and below. More... | |
void | set_unexpected_change (unsigned int flags) |
Sets one or more of the PandaNode::UnexpectedChange bits on, indicating that the corresponding property should not change again on this node. More... | |
bool | stash_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
Stashes the indicated child node. More... | |
void | stash_child (int child_index, Thread *current_thread=Thread::get_current_thread()) |
Stashes the indicated child node. More... | |
void | steal_children (PandaNode *other, Thread *current_thread=Thread::get_current_thread()) |
Moves all the children from the other node onto this node. More... | |
bool | unstash_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
Returns the indicated stashed node to normal child status. More... | |
void | unstash_child (int stashed_index, Thread *current_thread=Thread::get_current_thread()) |
Returns the indicated stashed node to normal child status. More... | |
virtual void | update_bam_nested (BamWriter *manager) |
Called by the BamWriter when this object has not itself been modified recently, but it should check its nested objects for updates. More... | |
virtual void | write (ostream &out, int indent_level) const |
void | write_recorder (BamWriter *manager, Datagram &dg) |
This method is provided for the benefit of classes (like MouseRecorder) that inherit from PandaMode and also RecorderBase. More... | |
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TypedWritableReferenceCount (const TypedWritableReferenceCount ©) | |
virtual ReferenceCount * | as_reference_count () |
Returns the pointer cast to a ReferenceCount pointer, if it is in fact of that type. More... | |
void | operator= (const TypedWritableReferenceCount ©) |
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TypedWritable (const TypedWritable ©) | |
virtual int | complete_pointers (TypedWritable **p_list, BamReader *manager) |
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin(). More... | |
string | encode_to_bam_stream () const |
Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a string string. More... | |
bool | encode_to_bam_stream (string &data, BamWriter *writer=NULL) const |
Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. More... | |
virtual void | finalize (BamReader *manager) |
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. More... | |
UpdateSeq | get_bam_modified () const |
Returns the current bam_modified counter. More... | |
void | mark_bam_modified () |
Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. More... | |
void | operator= (const TypedWritable ©) |
virtual bool | require_fully_complete () const |
Some objects require all of their nested pointers to have been completed before the objects themselves can be completed. More... | |
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TypedObject (const TypedObject ©) | |
TypedObject * | as_typed_object () |
Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
const TypedObject * | as_typed_object () const |
Returns the object, upcast (if necessary) to a TypedObject pointer. More... | |
int | get_best_parent_from_Set (const std::set< int > &) const |
int | get_type_index () const |
Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More... | |
bool | is_exact_type (TypeHandle handle) const |
Returns true if the current object is the indicated type exactly. More... | |
bool | is_of_type (TypeHandle handle) const |
Returns true if the current object is or derives from the indicated type. More... | |
void | operator= (const TypedObject ©) |
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int | get_ref_count () const |
Returns the current reference count. More... | |
WeakReferenceList * | get_weak_list () const |
Returns the WeakReferenceList associated with this ReferenceCount object. More... | |
bool | has_weak_list () const |
Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise. More... | |
void | local_object () |
This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack. More... | |
void | ref () const |
Explicitly increments the reference count. More... | |
bool | test_ref_count_integrity () const |
Does some easy checks to make sure that the reference count isn't completely bogus. More... | |
bool | test_ref_count_nonzero () const |
Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More... | |
virtual bool | unref () const |
Explicitly decrements the reference count. More... | |
void | weak_ref (WeakPointerToVoid *ptv) |
Adds the indicated PointerToVoid as a weak reference to this object. More... | |
void | weak_unref (WeakPointerToVoid *ptv) |
Removes the indicated PointerToVoid as a weak reference to this object. More... | |
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Namable (const string &initial_name="") | |
Namable (const Namable ©) | |
void | clear_name () |
Resets the Namable's name to empty. More... | |
const string & | get_name () const |
bool | has_name () const |
Returns true if the Namable has a nonempty name set, false if the name is empty. More... | |
Namable & | operator= (const Namable &other) |
void | output (ostream &out) const |
Outputs the Namable. More... | |
void | set_name (const string &name) |
Static Public Member Functions | |
static TypeHandle | get_class_type () |
static void | init_type () |
static void | register_with_read_factory () |
Tells the BamReader how to create objects of type Fog. More... | |
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static DrawMask | get_all_camera_mask () |
Returns a DrawMask that is appropriate for rendering to all cameras. More... | |
static TypeHandle | get_class_type () |
static DrawMask | get_overall_bit () |
Returns the special bit that, when specifically cleared in the node's DrawMask, indicates that the node is hidden to all cameras, regardless of the remaining DrawMask bits. More... | |
static void | init_type () |
static | PT (PandaNode) decode_from_bam_stream(const string &data |
static void | register_with_read_factory () |
Tells the BamReader how to create objects of type PandaNode. More... | |
static void | reset_all_prev_transform (Thread *current_thread=Thread::get_current_thread()) |
Visits all nodes in the world with the _dirty_prev_transform flag–that is, all nodes whose _prev_transform is different from the _transform in pipeline stage 0–and resets the _prev_transform to be the same as _transform. More... | |
static void | set_scene_root_func (SceneRootFunc *func) |
This is used by the GraphicsEngine to hook in a pointer to the scene_root_func(), the function to determine whether the node is an active scene root. More... | |
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static TypeHandle | get_class_type () |
static void | init_type () |
static | PT (TypedWritableReferenceCount) decode_from_bam_stream(const string &data |
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static bool | decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, const string &data, BamReader *reader=NULL) |
Reads the string created by a previous call to encode_to_bam_stream(), and extracts the single object on that string. More... | |
static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
This function is declared non-inline to work around a compiler bug in g++ 2.96. More... | |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
Additional Inherited Members | |
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virtual LPoint3 bool const TransformState Thread * | current_thread = Thread::get_current_thread()) const |
Thread * | current_thread = Thread::get_current_thread()) const |
virtual LPoint3 bool & | found_any |
virtual LPoint3 & | max_point |
static BamReader * | reader = NULL) |
virtual LPoint3 bool const TransformState * | transform |
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static BamReader * | reader = NULL) |
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static TypedWritable *const | Null = (TypedWritable*)0L |
Specifies how atmospheric fog effects are applied to geometry.
The Fog object is now a PandaNode, which means it can be used similarly to a Light to define effects relative to a particular coordinate system within the scene graph.
In exponential mode, the fog effects are always camera-relative, and it does not matter where the Fog node is parented. However, in linear mode, the onset and opaque distances are defined as offsets along the local forward axis (e.g. the Y axis). This allows the fog effect to be localized to a particular region in space, rather than always camera-relative. If the fog object is not parented to any node, it is used to generate traditonal camera-relative fog, as if it were parented to the camera.
void Fog::adjust_to_camera | ( | const TransformState * | camera_transform | ) |
This function is intended to be called by the cull traverser to compute the appropriate camera-relative onset and opaque distances, based on the fog node's position within the scene graph (if linear fog is in effect).
Definition at line 155 of file fog.cxx.
References LVector3f::forward(), PandaNode::get_num_parents(), and LVecBase3f::normalize().
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Returns the color of the fog.
Definition at line 53 of file fog.I.
Referenced by GraphicsStateGuardian::fetch_specified_part().
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Returns the density of the fog for exponential calculations.
This is only used if the mode is not M_linear.
Definition at line 228 of file fog.I.
Referenced by GraphicsStateGuardian::fetch_specified_part().
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void Fog::get_linear_range | ( | PN_stdfloat & | onset, |
PN_stdfloat & | opaque | ||
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Retrieves the current onset and offset ranges.
Definition at line 197 of file fog.cxx.
Referenced by GraphicsStateGuardian::fetch_specified_part().
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Tells the BamReader how to create objects of type Fog.
Definition at line 209 of file fog.cxx.
References BamReader::get_factory(), and Factory< Type >::register_factory().
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Fog effects are traditionally defined in camera-relative space, but the Panda Fog node has a special mode in which it can define a linear fog effect in an arbitrary coordinate space.
This is done by specifying 3-d onset and opaque points, and parenting the Fog object somewhere within the scene graph. In this mode, the fog will be rendered as if it extended along the vector from the onset point to the opaque point, in 3-d space.
However, the underlying fog effect supported by hardware is generally only one-dimensional, and must be rendered based on linear distance from the camera plane. Thus, this in-the-world effect is most effective when the fog vector from onset point to opaque point is most nearly parallel to the camera's eye vector.
As the angle between the fog vector and the eye vector increases, the accuracy of the effect diminishes, up to a complete breakdown of the effect at a 90 degree angle.
This function exists to define the workaround to this problem. The linear fallback parameters given here specify how the fog should be rendered when the parameters are exceeded in this way.
The angle parameter is the minimum angle, in degrees, of the fog vector to the eye vector, at which the fallback effect should be employed. The onset and opaque parameters specify the camera-relative onset and opaque distances to pass to the rendering hardware when employing the fallback effect. This supercedes the 3-d onset point and opaque points.
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Specifies the effects of the fog in linear distance units.
This is only used if the mode is M_linear.
This specifies a fog that begins at distance onset units from the origin, and becomes totally opaque at distance opaque units from the origin, along the forward axis (usually Y).
This function also implicitly sets the mode the M_linear, if it is not already set.
Definition at line 95 of file fog.I.
References LVector3f::forward().
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Specifies the computation that is used to determine the fog effect.
If this is M_linear, then the fog will range from linearly from the onset point to the opaque point (or for the distances specified in set_linear_range), and the fog object should be parented into the scene graph, or to the camera.
If this is anything else, the onset point and opaque point are not used, and the fog effect is based on the value specified to set_exp_density(), and it doesn't matter to which node the fog object is parented, or if it is parented anywhere at all.
Writes the contents of this object to the datagram for shipping out to a Bam file.
Reimplemented from PandaNode.
Definition at line 220 of file fog.cxx.
References Datagram::add_int8(), Datagram::add_stdfloat(), LVecBase3f::write_datagram(), LVecBase4f::write_datagram(), and PandaNode::write_datagram().
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