Panda3D
|
This effect automatically applies a computed texture matrix to the specified texture stage, according to the relative position of two specified nodes. More...
Public Member Functions | |
const RenderEffect | addStage (TextureStage stage, const NodePath from, const NodePath to, int lens_index) |
Returns a new TexProjectorEffect just like this one, with the indicated projection for the given stage. If this stage already exists, its projection definition is replaced. More... | |
NodePath | getFrom (TextureStage stage) |
Returns the "from" node associated with the TexProjectorEffect on the indicated stage. The relative transform between the "from" and the "to" nodes is automatically applied to the texture transform each frame. More... | |
int | getLensIndex (TextureStage stage) |
Returns the lens_index associated with the TexProjectorEffect on the indicated stage. This is only used if the "to" node is a LensNode, in which case it specifies the particular lens that should be used. More... | |
NodePath | getTo (TextureStage stage) |
Returns the "to" node associated with the TexProjectorEffect on the indicated stage. The relative transform between the "from" and the "to" nodes is automatically applied to the texture transform each frame. More... | |
bool | hasStage (TextureStage stage) |
Returns true if there is a transform associated with the indicated stage, or false otherwise (in which case get_transform(stage) will return the identity transform). More... | |
bool | isEmpty () |
Returns true if no stages are defined in the TexProjectorEffect, false if at least one is. More... | |
const RenderEffect | removeStage (TextureStage stage) |
Returns a new TexProjectorEffect just like this one, with the indicated stage removed. More... | |
![]() | |
int | compareTo (const RenderEffect other) |
Provides an arbitrary ordering among all unique RenderEffects, so we can store the essentially different ones in a big set and throw away the rest. More... | |
output (Ostream out) | |
write (Ostream out, int indent_level) | |
![]() | |
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... | |
![]() | |
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... | |
![]() | |
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 const RenderEffect | make () |
Constructs a TexProjectorEffect that modifies no stages at all. More... | |
![]() | |
static TypeHandle | getClassType () |
static int | getNumEffects () |
Returns the total number of unique RenderEffect objects allocated in the world. This will go up and down during normal operations. More... | |
static | listEffects (Ostream out) |
Lists all of the RenderEffects 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. More... | |
static bool | validateEffects () |
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 RenderEffect objects). More... | |
![]() | |
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 TypeHandle | getClassType () |
![]() | |
static TypeHandle | getClassType () |
![]() | |
static TypeHandle | getClassType () |
This effect automatically applies a computed texture matrix to the specified texture stage, according to the relative position of two specified nodes.
The relative transform from the "from" node to the "to" node is applied directly to the texture matrix each frame. If the "to" node happens to be a LensNode, its lens projection matrix is applied as well.
This can be used to apply a number of special effects. Fundamentally, it may simply be used to provide a separate PandaNode that may be adjusted (e.g. via a LerpInterval) in order to easily apply a linear transformation to an object's texture coordinates (rather than having to explicitly call NodePath.set_tex_transform() each frame).
In a more sophisticated case, the TexProjectorEffect is particularly useful in conjunction with a TexGenAttrib that specifies a mode of M_world_position (which copies the world position of each vertex to the texture coordinates). Then the TexProjector can be used to convert these world coordinates to the relative coordinates of a particular node, causing (for instance) a texture to appear to follow a node around as it moves through the world. With a LensNode, you can project a texture onto the walls, for instance to apply a flashlight effect or an image-based shadow.
const RenderEffect addStage | ( | TextureStage | stage, |
const NodePath | from, | ||
const NodePath | to, | ||
int | lens_index | ||
) |
Returns a new TexProjectorEffect just like this one, with the indicated projection for the given stage. If this stage already exists, its projection definition is replaced.
The relative transform between the "from" and the "to" nodes is automatically applied to the texture transform each frame.
Furthermore, if the "to" node is a LensNode, its projection matrix is also applied to the texture transform. In this case, the lens_index may be used to select the particular lens that should be used.
|
static |
NodePath getFrom | ( | TextureStage | stage | ) |
Returns the "from" node associated with the TexProjectorEffect on the indicated stage. The relative transform between the "from" and the "to" nodes is automatically applied to the texture transform each frame.
int getLensIndex | ( | TextureStage | stage | ) |
Returns the lens_index associated with the TexProjectorEffect on the indicated stage. This is only used if the "to" node is a LensNode, in which case it specifies the particular lens that should be used.
NodePath getTo | ( | TextureStage | stage | ) |
Returns the "to" node associated with the TexProjectorEffect on the indicated stage. The relative transform between the "from" and the "to" nodes is automatically applied to the texture transform each frame.
Furthermore, if the "to" node is a LensNode, its projection matrix is also applied to the texture transform.
bool hasStage | ( | TextureStage | stage | ) |
Returns true if there is a transform associated with the indicated stage, or false otherwise (in which case get_transform(stage) will return the identity transform).
bool isEmpty | ( | ) |
Returns true if no stages are defined in the TexProjectorEffect, false if at least one is.
|
static |
Constructs a TexProjectorEffect that modifies no stages at all.
const RenderEffect removeStage | ( | TextureStage | stage | ) |
Returns a new TexProjectorEffect just like this one, with the indicated stage removed.