This object performs a depth-first traversal of the scene graph, with optional view-frustum culling, collecting CullState and searching for GeomNodes. More...

#include "portalClipper.h"

Inheritance diagram for PortalClipper:

List of all members.

Classes
class	Point
Public Member Functions
	PortalClipper (GeometricBoundingVolume frustum, SceneSetup scene_setup)
void	draw_camera_frustum ()
	Draw the current camera frustum in white color.
void	draw_current_portal ()
	_portal_node is the current portal, draw it.
void	draw_hexahedron (BoundingHexahedron *frustum)
	Given the BoundingHexahedron draw it using lines.
void	draw_lines ()
	Draw all the lines in the buffer Cyan portal is the original geometry of the portal Yellow portal is the AA minmax & clipped portal Blue frustum is the frustum through portal White frustum is the camera frustum.
void	draw_to (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z)
	Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point.
void	draw_to (const LVecBase3 &v)
	Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point.
virtual TypeHandle	force_init_type ()
const RenderState *	get_clip_state () const
	Returns the stored clip state.
BoundingHexahedron *	get_reduced_frustum () const
	Return the reduced frustum.
void	get_reduced_viewport (LPoint2 &min, LPoint2 &max) const
	Return the reduced viewport.
virtual TypeHandle	get_type () const
bool	is_facing_view (const LPlane &portal_plane)
	checks if the portal plane (in camera space) is facing the camera's near plane
bool	is_partial_portal_in_view ()
bool	is_whole_portal_in_view (const LMatrix4 &cmat)
	checks if portal_node is within the view frustum.
void	move_to (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z)
	Moves the pen to the given point without drawing a line.
void	move_to (const LVecBase3 &v)
	Moves the pen to the given point without drawing a line.
bool	prepare_portal (const NodePath &node_path)
	Given the portal draw the frustum with line segs for now.
	PT (GeomNode) _previous
void	set_clip_state (const RenderState *clip_state)
	Set the clip state of the current portal node This is done to remember the state for the child portal nodes.
void	set_reduced_frustum (BoundingHexahedron *bh)
	Set the current view frustum that is being calculated by the portal clipper.
void	set_reduced_viewport (const LPoint2 &min, const LPoint2 &max)
	Set the current viewport that is being used by the portal clipper.
Static Public Member Functions
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.
Public Attributes
SceneSetup *	_scene_setup

Detailed Description

This object performs a depth-first traversal of the scene graph, with optional view-frustum culling, collecting CullState and searching for GeomNodes.

Each renderable Geom encountered is passed along with its associated RenderState to the CullHandler object.

Definition at line 52 of file portalClipper.h.

Member Function Documentation

void PortalClipper::draw_camera_frustum ( ) [inline]

Draw the current camera frustum in white color.

Definition at line 94 of file portalClipper.I.

References draw_hexahedron().

Referenced by CullTraverser::traverse().

void PortalClipper::draw_current_portal ( )

_portal_node is the current portal, draw it.

Definition at line 143 of file portalClipper.cxx.

References draw_to(), PortalNode::get_vertex(), and move_to().

void PortalClipper::draw_hexahedron ( BoundingHexahedron * frustum )

Given the BoundingHexahedron draw it using lines.

Definition at line 114 of file portalClipper.cxx.

References draw_to(), BoundingHexahedron::get_point(), and move_to().

Referenced by draw_camera_frustum(), and prepare_portal().

void PortalClipper::draw_lines ( )

Draw all the lines in the buffer Cyan portal is the original geometry of the portal Yellow portal is the AA minmax & clipped portal Blue frustum is the frustum through portal White frustum is the camera frustum.

Definition at line 161 of file portalClipper.cxx.

References GeomVertexWriter::add_data3(), GeomVertexWriter::add_data4(), and GeomVertexFormat::get_v3cp().

Referenced by CullTraverser::traverse().

void PortalClipper::draw_to	(	PN_stdfloat	x,
		PN_stdfloat	y,
		PN_stdfloat	z
	)		`[inline]`

Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point.

move_to() and draw_to() only update tables; the actual drawing is performed when create() is called.

Definition at line 83 of file portalClipper.I.

Referenced by draw_current_portal(), draw_hexahedron(), and prepare_portal().

void PortalClipper::draw_to ( const LVecBase3 & v )

Draws a line segment from the pen's last position (the last call to move_to or draw_to) to the indicated point.

move_to() and draw_to() only update tables; the actual drawing is performed when create() is called.

Definition at line 92 of file portalClipper.cxx.

References move_to().

const RenderState * PortalClipper::get_clip_state ( ) const [inline]

Returns the stored clip state.

Definition at line 139 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

BoundingHexahedron * PortalClipper::get_reduced_frustum ( ) const [inline]

Return the reduced frustum.

Definition at line 117 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

void PortalClipper::get_reduced_viewport	(	LPoint2 &	min,
		LPoint2 &	max
	)		const `[inline]`

Return the reduced viewport.

Definition at line 163 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

static void PortalClipper::init_type ( ) [inline, static]

This function is declared non-inline to work around a compiler bug in g++ 2.96.

Making it inline seems to cause problems in the optimizer.

Reimplemented from TypedObject.

Definition at line 86 of file portalClipper.h.

References TypedObject::init_type().

bool PortalClipper::is_facing_view ( const LPlane & portal_plane ) [inline]

checks if the portal plane (in camera space) is facing the camera's near plane

Definition at line 177 of file portalClipper.I.

Referenced by prepare_portal().

bool PortalClipper::is_whole_portal_in_view ( const LMatrix4 & cmat ) [inline]

checks if portal_node is within the view frustum.

If so, then the portal is worth considering. This is a 2nd level test to weed out most of the portals

Definition at line 190 of file portalClipper.I.

References GeometricBoundingVolume::contains().

void PortalClipper::move_to	(	PN_stdfloat	x,
		PN_stdfloat	y,
		PN_stdfloat	z
	)		`[inline]`

Moves the pen to the given point without drawing a line.

When followed by draw_to(), this marks the first point of a line segment; when followed by move_to() or create(), this creates a single point.

Definition at line 69 of file portalClipper.I.

Referenced by draw_current_portal(), draw_hexahedron(), draw_to(), and prepare_portal().

void PortalClipper::move_to ( const LVecBase3 & v )

Moves the pen to the given point without drawing a line.

When followed by draw_to(), this marks the first point of a line segment; when followed by move_to() or create(), this creates a single point.

Definition at line 73 of file portalClipper.cxx.

bool PortalClipper::prepare_portal ( const NodePath & node_path )

Given the portal draw the frustum with line segs for now.

More functionalities coming up

Definition at line 222 of file portalClipper.cxx.

References draw_hexahedron(), draw_to(), Lens::extrude(), LVector3f::forward(), Lens::get_coordinate_system(), SceneSetup::get_cull_center(), SceneSetup::get_lens(), NodePath::get_transform(), PortalNode::get_vertex(), is_facing_view(), TypedObject::is_of_type(), move_to(), NodePath::node(), and Lens::project().

Referenced by PortalNode::cull_callback().

void PortalClipper::set_clip_state ( const RenderState * clip_state ) [inline]

Set the clip state of the current portal node This is done to remember the state for the child portal nodes.

Definition at line 129 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

void PortalClipper::set_reduced_frustum ( BoundingHexahedron * frustum ) [inline]

Set the current view frustum that is being calculated by the portal clipper.

Definition at line 107 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

void PortalClipper::set_reduced_viewport	(	const LPoint2 &	min,
		const LPoint2 &	max
	)		`[inline]`

Set the current viewport that is being used by the portal clipper.

Definition at line 151 of file portalClipper.I.

Referenced by PortalNode::cull_callback().

The documentation for this class was generated from the following files:

panda/src/pgraph/portalClipper.h
panda/src/pgraph/portalClipper.cxx
panda/src/pgraph/portalClipper.I

Classes

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation