Panda3D
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CollisionPolygon Class Reference
Inheritance diagram for CollisionPolygon:
CollisionPlane CollisionSolid CopyOnWriteObject CachedTypedWritableReferenceCount TypedWritableReferenceCount TypedWritable ReferenceCount TypedObject MemoryBase MemoryBase

Public Member Functions

 __init__ (const LPoint3 begin, const LPoint3 end)
 
 __init__ (const LVecBase3 a, const LVecBase3 b, const LVecBase3 c)
 
 __init__ (const LVecBase3 a, const LVecBase3 b, const LVecBase3 c, const LVecBase3 d)
 
int getNumPoints ()
 Returns the number of vertices of the CollisionPolygon. More...
 
LPoint3 getPoint (int n)
 Returns the nth vertex of the CollisionPolygon, expressed in 3-D space. More...
 
list getPoints ()
 
bool isConcave ()
 Returns true if the CollisionPolygon appears to be concave, or false if it is safely convex. More...
 
bool isValid ()
 Returns true if the CollisionPolygon is valid (that is, it has at least three vertices), or false otherwise. More...
 
- Public Member Functions inherited from CollisionPlane
 __init__ (const CollisionPlane copy)
 
 __init__ (const LPlane plane)
 
float distToPlane (const LPoint3 point)
 
 flip ()
 Convenience method to flip the plane in-place. More...
 
LVector3 getNormal ()
 
const LPlane getPlane ()
 
 setPlane (const LPlane plane)
 
- Public Member Functions inherited from CollisionSolid
 clearEffectiveNormal ()
 Removes the normal previously set by set_effective_normal(). More...
 
const BoundingVolume getBounds ()
 Returns the solid's bounding volume. More...
 
LPoint3 getCollisionOrigin ()
 
const LVector3 getEffectiveNormal ()
 Returns the normal that was set by set_effective_normal(). It is an error to call this unless has_effective_normal() returns true. More...
 
bool getRespectEffectiveNormal ()
 See set_respect_effective_normal(). More...
 
bool hasEffectiveNormal ()
 Returns true if a special normal was set by set_effective_normal(), false otherwise. More...
 
bool isTangible ()
 Returns whether the solid is considered 'tangible' or not. An intangible solid has no effect in a CollisionHandlerPusher (except to throw an event); it's useful for defining 'trigger' planes and spheres, that cause an effect when passed through. More...
 
 output (Ostream out)
 
 setBounds (const BoundingVolume bounding_volume)
 Returns the solid's bounding volume. More...
 
 setEffectiveNormal (const LVector3 effective_normal)
 Records a false normal for this CollisionSolid that will be reported by the collision system with all collisions into it, instead of its actual normal. This is useful as a workaround for the problem of an avatar wanting to stand on a sloping ground; by storing a false normal, the ground appears to be perfectly level, and the avatar does not tend to slide down it. More...
 
 setRespectEffectiveNormal (bool respect_effective_normal)
 This is only meaningful for CollisionSolids that will be added to a traverser as colliders. It is normally true, but if set false, it means that this particular solid does not care about the "effective" normal of other solids it meets, but rather always uses the true normal. More...
 
 setTangible (bool tangible)
 Sets the current state of the 'tangible' flag. Set this true to make the solid tangible, so that a CollisionHandlerPusher will not allow another object to intersect it, or false to make it intangible, so that a CollisionHandlerPusher will ignore it except to throw an event. More...
 
 write (Ostream out, int indent_level)
 
- Public Member Functions inherited from CopyOnWriteObject
 cacheRef ()
 See CachedTypedWritableReferenceCount::cache_ref(). More...
 
bool cacheUnref ()
 See CachedTypedWritableReferenceCount::cache_unref(). More...
 
- Public Member Functions inherited from CachedTypedWritableReferenceCount
 cacheRef ()
 Explicitly increments the cache reference count and the normal reference count simultaneously. More...
 
bool cacheUnref ()
 Explicitly decrements the cache reference count and the normal reference count simultaneously. More...
 
int getCacheRefCount ()
 Returns the current reference count. More...
 
bool testRefCountIntegrity ()
 Does some easy checks to make sure that the reference count isn't completely bogus. More...
 
- Public Member Functions inherited from TypedWritable
object __reduce__ ()
 
object __reduce_persist__ (object pickler)
 
str encodeToBamStream ()
 Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a string string. Returns empty string on failure. More...
 
bool encodeToBamStream (String data, BamWriter writer)
 Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. Returns true on success, false on failure. More...
 
UpdateSeq getBamModified ()
 Returns the current bam_modified counter. This counter is normally incremented automatically whenever the object is modified. More...
 
 markBamModified ()
 Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. This should normally not need to be called by user code; it should be called internally when the object has been changed in a way that legitimately requires its retransmission to any connected clients. More...
 
- Public Member Functions inherited from TypedObject
TypeHandle getType ()
 Derived classes should override this function to return get_class_type(). More...
 
int getTypeIndex ()
 Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. This is equivalent to get_type().get_index(). More...
 
bool isExactType (TypeHandle handle)
 Returns true if the current object is the indicated type exactly. More...
 
bool isOfType (TypeHandle handle)
 Returns true if the current object is or derives from the indicated type. More...
 
- Public Member Functions inherited from ReferenceCount
int getRefCount ()
 Returns the current reference count. More...
 
 ref ()
 Explicitly increments the reference count. User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically. More...
 
bool testRefCountIntegrity ()
 Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise. More...
 
bool testRefCountNonzero ()
 Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise. More...
 
bool unref ()
 Explicitly decrements the reference count. Note that the object will not be implicitly deleted by unref() simply because the reference count drops to zero. (Having a member function delete itself is problematic.) However, see the helper function unref_delete(). More...
 

Static Public Member Functions

static TypeHandle getClassType ()
 
static bool verifyPoints (const LPoint3 begin, const LPoint3 end)
 Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated. More...
 
static bool verifyPoints (const LPoint3 a, const LPoint3 b, const LPoint3 c)
 Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated. More...
 
static bool verifyPoints (const LPoint3 a, const LPoint3 b, const LPoint3 c, const LPoint3 d)
 Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated. More...
 
- Static Public Member Functions inherited from CollisionPlane
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from CollisionSolid
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from CopyOnWriteObject
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from CachedTypedWritableReferenceCount
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedWritableReferenceCount
static TypedWritableReferenceCount decodeFromBamStream (str data, BamReader reader)
 Reads the string created by a previous call to encode_to_bam_stream(), and extracts and returns the single object on that string. Returns NULL on error. More...
 
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedWritable
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedObject
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from ReferenceCount
static TypeHandle getClassType ()
 

Member Function Documentation

◆ __init__() [1/3]

__init__ ( const LPoint3  begin,
const LPoint3  end 
)

◆ __init__() [2/3]

__init__ ( const LVecBase3  a,
const LVecBase3  b,
const LVecBase3  c 
)

◆ __init__() [3/3]

__init__ ( const LVecBase3  a,
const LVecBase3  b,
const LVecBase3  c,
const LVecBase3  d 
)

◆ getClassType()

static TypeHandle getClassType ( )
static

◆ getNumPoints()

int getNumPoints ( )

Returns the number of vertices of the CollisionPolygon.

◆ getPoint()

LPoint3 getPoint ( int  n)

Returns the nth vertex of the CollisionPolygon, expressed in 3-D space.

◆ getPoints()

list getPoints ( )

◆ isConcave()

bool isConcave ( )

Returns true if the CollisionPolygon appears to be concave, or false if it is safely convex.

◆ isValid()

bool isValid ( )

Returns true if the CollisionPolygon is valid (that is, it has at least three vertices), or false otherwise.

◆ verifyPoints() [1/3]

static bool verifyPoints ( const LPoint3  begin,
const LPoint3  end 
)
static

Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.

This does not check that the polygon defined is convex; that check is made later, once we have projected the points to 2-d space where the decision is easier.

◆ verifyPoints() [2/3]

static bool verifyPoints ( const LPoint3  a,
const LPoint3  b,
const LPoint3  c 
)
static

Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.

◆ verifyPoints() [3/3]

static bool verifyPoints ( const LPoint3  a,
const LPoint3  b,
const LPoint3  c,
const LPoint3  d 
)
static

Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.