# TexGenAttrib

from pandac.PandaModules import TexGenAttrib

Class : TexGenAttrib
Description : Computes texture coordinates for geometry automatically based on vertex position and/or normal. This can be used to implement reflection and/or refraction maps, for instance to make shiny surfaces, as well as other special effects such as projective texturing.

## Inheritance:

TexGenAttrib: RenderAttrib
RenderAttrib: TypedWritableReferenceCount
TypedWritableReferenceCount: TypedWritable ReferenceCount
TypedWritable: TypedObject
TypedObject: MemoryBase
MemoryBase:
ReferenceCount: MemoryBase

## Methods of TexGenAttrib:

addStage
getClassType
getConstantValue
getGeomRendering
getLight
getMode
getSourceName
hasGenTexcoordStage
hasStage
isEmpty
make
removeStage

## Methods of RenderAttrib:

compareTo
getClassType
getNumAttribs
listAttribs
output
unref
validateAttribs
write

## Methods of TypedWritableReferenceCount:

getClassType

## Methods of TypedWritable:

getClassType

## Methods of TypedObject:

getClassType
getType
getTypeIndex
isExactType
isOfType

## Methods of ReferenceCount:

getClassType
getRefCount
ref
testRefCountIntegrity
testRefCountNonzero
unref

## Constants in RenderAttrib:

MNone | (PandaCompareFunc)
MNever | (PandaCompareFunc)
MLess | (PandaCompareFunc)
MEqual | (PandaCompareFunc)
MLessEqual | (PandaCompareFunc)
MGreater | (PandaCompareFunc)
MNotEqual | (PandaCompareFunc)
MGreaterEqual | (PandaCompareFunc)
MAlways | (PandaCompareFunc)
MOff | (TexGenMode)
MEyeSphereMap | (TexGenMode)
MWorldCubeMap | (TexGenMode)
MEyeCubeMap | (TexGenMode)
MWorldNormal | (TexGenMode)
MEyeNormal | (TexGenMode)
MWorldPosition | (TexGenMode)
MUnused | (TexGenMode)
MEyePosition | (TexGenMode)
MPointSprite | (TexGenMode)
MLightVector | (TexGenMode)
MConstant | (TexGenMode)

addStage ConstPointerTo< RenderAttrib > TexGenAttrib::add_stage(TextureStage *stage, RenderAttrib::TexGenMode mode) const; Description: Returns a new TexGenAttrib just like this one, with the indicated generation mode for the given stage. If this stage already exists, its mode is replaced. This variant also accepts source_name and light, which are only meaningful if mode is M_light_vector. This variant also accepts constant_value, which is only meaningful if mode is M_constant.

getClassType static TypeHandle TexGenAttrib::get_class_type(void); Undocumented function.

getConstantValue LPoint3f const &TexGenAttrib::get_constant_value(TextureStage *stage) const; Description: Returns the constant value associated with the named texture stage. This is only meaningful if the mode is M_constant.

getGeomRendering int TexGenAttrib::get_geom_rendering(int geom_rendering) const; Description: Returns the union of the Geom::GeomRendering bits that will be required once this TexGenAttrib is applied to a geom which includes the indicated geom_rendering bits.

getLight NodePath TexGenAttrib::get_light(TextureStage *stage) const; Description: Returns the Light associated with the named texture stage, or the empty NodePath if no light is associated with the indicated stage. This is only meaningful if the mode is M_light_vector.

getMode RenderAttrib::TexGenMode TexGenAttrib::get_mode(TextureStage *stage) const; Description: Returns the generation mode associated with the named texture stage, or M_off if nothing is associated with the indicated stage.

getSourceName string TexGenAttrib::get_source_name(TextureStage *stage) const; Description: Returns the source name associated with the named texture stage, or the empty string if no name is associated with the indicated stage. This is only meaningful if the mode is M_light_vector, in which case it indicates the name of the source texture coordinate set from which the tangent and binormal are derived.

hasGenTexcoordStage bool TexGenAttrib::has_gen_texcoord_stage(TextureStage *stage) const; Description: Returns true if the indicated TextureStage will have texture coordinates generated for it automatically (and thus there is no need to upload the texture coordinates encoded in the vertices).

hasStage bool TexGenAttrib::has_stage(TextureStage *stage) const; Description: Returns true if there is a mode associated with the indicated stage, or false otherwise (in which case get_transform(stage) will return M_off).

isEmpty bool TexGenAttrib::is_empty(void) const; Description: Returns true if no stages are defined in the TexGenAttrib, false if at least one is.

make static ConstPointerTo< RenderAttrib > TexGenAttrib::make(void); Description: Constructs a TexGenAttrib that generates no stages at all. Description: Constructs a TexGenAttrib that generates just the indicated stage.

removeStage ConstPointerTo< RenderAttrib > TexGenAttrib::remove_stage(TextureStage *stage) const; Description: Returns a new TexGenAttrib just like this one, with the indicated stage removed.

compareTo int RenderAttrib::compare_to(RenderAttrib const &other) const; Description: Provides an arbitrary ordering among all unique RenderAttribs, so we can store the essentially different ones in a big set and throw away the rest. This method is not needed outside of the RenderAttrib class because all equivalent RenderAttrib objects are guaranteed to share the same pointer; thus, a pointer comparison is always sufficient.

getClassType static TypeHandle RenderAttrib::get_class_type(void); Undocumented function.

getNumAttribs static int RenderAttrib::get_num_attribs(void); Description: Returns the total number of unique RenderAttrib objects allocated in the world. This will go up and down during normal operations.

listAttribs static void RenderAttrib::list_attribs(ostream &out); Description: Lists all of the RenderAttribs in the cache to the output stream, one per line. This can be quite a lot of output if the cache is large, so be prepared.

output virtual void RenderAttrib::output(ostream &out) const; Description:

unref bool RenderAttrib::unref(void) const; Description: This method overrides ReferenceCount::unref() to clear the pointer from the global object pool when its reference count goes to zero.

validateAttribs static bool RenderAttrib::validate_attribs(void); Description: Ensures that the cache is still stored in sorted order. Returns true if so, false if there is a problem (which implies someone has modified one of the supposedly-const RenderAttrib objects).

write virtual void RenderAttrib::write(ostream &out, int indent_level) const; Description:

getClassType static TypeHandle TypedWritableReferenceCount::get_class_type(void); Undocumented function.

getClassType static TypeHandle TypedWritable::get_class_type(void); Undocumented function.

getClassType static TypeHandle TypedObject::get_class_type(void); Undocumented function.

getType virtual TypeHandle TypedObject::get_type(void) const = 0; Derived classes should override this function to return get_class_type().

getTypeIndex int TypedObject::get_type_index(void) const; Description: 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().

isExactType bool TypedObject::is_exact_type(TypeHandle handle) const; Description: Returns true if the current object is the indicated type exactly.

isOfType bool TypedObject::is_of_type(TypeHandle handle) const; Description: Returns true if the current object is or derives from the indicated type.

getClassType static TypeHandle ReferenceCount::get_class_type(void); Undocumented function.

getRefCount int ReferenceCount::get_ref_count(void) const; Description: Returns the current reference count.

ref void ReferenceCount::ref(void) const; Description: 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. This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.

testRefCountIntegrity bool ReferenceCount::test_ref_count_integrity(void) const; Description: Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise.

testRefCountNonzero bool ReferenceCount::test_ref_count_nonzero(void) const; Description: Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise.

unref bool ReferenceCount::unref(void) const; Description: 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; plus, we don't have a virtual destructor anyway.) However, see the helper function unref_delete(). 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. This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it. The return value is true if the new reference count is nonzero, false if it is zero.