308 lines
12 KiB
Plaintext
308 lines
12 KiB
Plaintext
// Filename: cullTraverser.I
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// Created by: drose (23Feb02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_gsg
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// Access: Published
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// Description: Returns the GraphicsStateGuardian in effect.
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////////////////////////////////////////////////////////////////////
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INLINE GraphicsStateGuardianBase *CullTraverser::
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get_gsg() const {
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return _gsg;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_current_thread
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// Access: Published
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// Description: Returns the currently-executing thread object, as
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// passed to the CullTraverser constructor.
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////////////////////////////////////////////////////////////////////
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INLINE Thread *CullTraverser::
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get_current_thread() const {
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return _current_thread;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_scene
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// Access: Published
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// Description: Returns the SceneSetup object.
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////////////////////////////////////////////////////////////////////
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INLINE SceneSetup *CullTraverser::
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get_scene() const {
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return _scene_setup;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::has_tag_state_key
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// Access: Published
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// Description: Returns true if a nonempty tag state key has been
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// specified for the scene's camera, false otherwise.
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////////////////////////////////////////////////////////////////////
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INLINE bool CullTraverser::
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has_tag_state_key() const {
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return _has_tag_state_key;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_tag_state_key
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// Access: Published
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// Description: Returns the tag state key that has been specified for
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// the scene's camera, if any.
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////////////////////////////////////////////////////////////////////
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INLINE const string &CullTraverser::
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get_tag_state_key() const {
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return _tag_state_key;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_camera_transform
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// Access: Published
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// Description: Returns the position of the camera relative to the
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// starting node.
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////////////////////////////////////////////////////////////////////
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INLINE const TransformState *CullTraverser::
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get_camera_transform() const {
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return _scene_setup->get_camera_transform();
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_world_transform
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// Access: Published
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// Description: Returns the position of the starting node relative
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// to the camera. This is the inverse of the camera
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// transform.
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//
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// Note that this value is always the position of the
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// starting node, not the current node, even if it is
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// sampled during a traversal. To get the transform of
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// the current node use
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// CullTraverserData::get_modelview_transform().
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////////////////////////////////////////////////////////////////////
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INLINE const TransformState *CullTraverser::
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get_world_transform() const {
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return _scene_setup->get_world_transform();
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_initial_state
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// Access: Published
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// Description: Returns the initial RenderState at the top of the
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// scene graph we are traversing, or the empty state if
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// the initial state was never set.
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////////////////////////////////////////////////////////////////////
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INLINE const RenderState *CullTraverser::
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get_initial_state() const {
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return _initial_state;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_depth_offset_decals
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// Access: Published
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// Description: Returns true, as depth offsets are the only way
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// that we implement decals nowadays.
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////////////////////////////////////////////////////////////////////
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INLINE bool CullTraverser::
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get_depth_offset_decals() const {
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return true;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::set_camera_mask
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// Access: Published
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// Description: Changes the visibility mask for the camera viewing
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// the scene. This is normally set automatically
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// at the time setup_scene() is called; you should
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// change this only if you want to render some set of
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// objects different from what the camera normally would
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// draw.
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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set_camera_mask(const DrawMask &camera_mask) {
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_camera_mask = camera_mask;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_camera_mask
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// Access: Published
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// Description: Returns the visibility mask from the camera viewing
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// the scene.
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////////////////////////////////////////////////////////////////////
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INLINE const DrawMask &CullTraverser::
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get_camera_mask() const {
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return _camera_mask;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::set_view_frustum
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// Access: Published
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// Description: Specifies the bounding volume that corresponds to the
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// view frustum. Any primitives that fall entirely
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// outside of this volume are not drawn.
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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set_view_frustum(GeometricBoundingVolume *view_frustum) {
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_view_frustum = view_frustum;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_view_frustum
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// Access: Published
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// Description: Returns the bounding volume that corresponds to the
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// view frustum, or NULL if the view frustum is not in
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// use or has not been set.
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//
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// Note that the view frustum returned here is always in
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// the coordinate space of the starting node, not the
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// current node, even if it is sampled during a
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// traversal. To get the view frustum in the current
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// node's coordinate space, check in the current
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// CullTraverserData.
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////////////////////////////////////////////////////////////////////
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INLINE GeometricBoundingVolume *CullTraverser::
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get_view_frustum() const {
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return _view_frustum;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::set_cull_handler
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// Access: Published
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// Description: Specifies the object that will receive the culled
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// Geoms. This must be set before calling traverse().
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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set_cull_handler(CullHandler *cull_handler) {
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_cull_handler = cull_handler;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_cull_handler
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// Access: Published
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// Description: Returns the object that will receive the culled
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// Geoms.
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////////////////////////////////////////////////////////////////////
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INLINE CullHandler *CullTraverser::
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get_cull_handler() const {
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return _cull_handler;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::set_portal_clipper
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// Access: Published
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// Description: Specifies _portal_clipper object pointer that
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// subsequent traverse() or traverse_below may use.
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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set_portal_clipper(PortalClipper *portal_clipper) {
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_portal_clipper = portal_clipper;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_portal_clipper
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// Access: Published
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// Description: Returns the _portal_clipper pointer
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////////////////////////////////////////////////////////////////////
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INLINE PortalClipper *CullTraverser::
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get_portal_clipper() const {
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return _portal_clipper;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::get_effective_incomplete_render
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// Access: Published
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// Description: Returns true if the cull traversal is effectively in
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// incomplete_render state, considering both the GSG's
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// incomplete_render and the current DisplayRegion's
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// incomplete_render flags. This returns the flag
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// during the cull traversal; see
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// GSG::get_effective_incomplete_render() for this same
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// flag during the draw traversal.
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////////////////////////////////////////////////////////////////////
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INLINE bool CullTraverser::
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get_effective_incomplete_render() const {
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return _effective_incomplete_render;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::flush_level
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// Access: Published, Static
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// Description: Flushes the PStatCollectors used during traversal.
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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flush_level() {
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_nodes_pcollector.flush_level();
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_geom_nodes_pcollector.flush_level();
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_geoms_pcollector.flush_level();
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_geoms_occluded_pcollector.flush_level();
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}
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////////////////////////////////////////////////////////////////////
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// Function: CullTraverser::do_traverse
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// Access: Protected
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// Description: This is implemented inline to reduce recursion.
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////////////////////////////////////////////////////////////////////
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INLINE void CullTraverser::
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do_traverse(CullTraverserData &data) {
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if (is_in_view(data)) {
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if (pgraph_cat.is_spam()) {
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pgraph_cat.spam()
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<< "\n" << data._node_path
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<< " " << data._draw_mask << "\n";
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}
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PandaNodePipelineReader *node_reader = data.node_reader();
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int fancy_bits = node_reader->get_fancy_bits();
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if ((fancy_bits & (PandaNode::FB_transform |
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PandaNode::FB_state |
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PandaNode::FB_effects |
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PandaNode::FB_tag |
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PandaNode::FB_draw_mask |
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PandaNode::FB_cull_callback)) == 0 &&
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data._cull_planes->is_empty()) {
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// Nothing interesting in this node; just move on.
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} else {
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// Something in this node is worth taking a closer look.
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const RenderEffects *node_effects = node_reader->get_effects();
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if (node_effects->has_show_bounds()) {
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// If we should show the bounding volume for this node, make it
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// up now.
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show_bounds(data, node_effects->has_show_tight_bounds());
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}
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data.apply_transform_and_state(this);
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const FogAttrib *fog = (const FogAttrib *)
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node_reader->get_state()->get_attrib(FogAttrib::get_class_slot());
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if (fog != (const FogAttrib *)NULL && fog->get_fog() != (Fog *)NULL) {
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// If we just introduced a FogAttrib here, call adjust_to_camera()
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// now. This maybe isn't the perfect time to call it, but it's
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// good enough; and at this time we have all the information we
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// need for it.
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fog->get_fog()->adjust_to_camera(get_camera_transform());
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}
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if (fancy_bits & PandaNode::FB_cull_callback) {
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PandaNode *node = data.node();
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if (!node->cull_callback(this, data)) {
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return;
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}
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}
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}
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traverse_below(data);
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}
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}
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