panda3d.egg.EggNode

class EggNode

Bases: EggNamedObject

A base class for things that may be directly added into the egg hierarchy. This includes groups, joints, polygons, vertex pools, etc., but does not include things like vertices.

Inheritance diagram

Inheritance diagram of EggNode

applyTexmats() → None

Applies the texture matrices to the UV’s of the vertices that reference them, and then removes the texture matrices from the textures themselves.

assign(copy: EggNode) → EggNode
Return type

EggNode

property depth

Returns the number of nodes above this node in the egg hierarchy.

Return type

int

determineAlphaMode() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has an alpha_mode other than AM_unspecified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineBin() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a bin specified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineDecal() → bool

Walks back up the hierarchy, looking for an EggGroup at this level or above that has the “decal” flag set. Returns the value of the decal flag if it is found, or false if it is not.

In other words, returns true if the “decal” flag is in effect for the indicated node, false otherwise.

determineDepthOffset() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_offset specified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineDepthTestMode() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_test_mode other than DTM_unspecified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineDepthWriteMode() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_write_mode other than DWM_unspecified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineDrawOrder() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a draw_order specified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

determineIndexed() → bool

Walks back up the hierarchy, looking for an EggGroup at this level or above that has the “indexed” scalar set. Returns the value of the indexed scalar if it is found, or false if it is not.

In other words, returns true if the “indexed” flag is in effect for the indicated node, false otherwise.

determineVisibilityMode() → EggRenderMode

Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a visibility_mode other than VM_unspecified. Returns a valid EggRenderMode pointer if one is found, or NULL otherwise.

Return type

EggRenderMode

flattenTransforms() → None

Removes any transform and instance records from this node in the scene graph and below. If an instance node is encountered, removes the instance and applies the transform to its vertices, duplicating vertices if necessary.

Since this function may result in duplicated vertices, it may be a good idea to call remove_unused_vertices() after calling this.

static getClassType() → TypeHandle
Return type

TypeHandle

getDepth() → int

Returns the number of nodes above this node in the egg hierarchy.

getNodeFrame() → LMatrix4d

Returns the coordinate frame of the node itself. This is simply the net product of all transformations up to the root.

Return type

LMatrix4d

getNodeFrameInv() → LMatrix4d

Returns the inverse of the matrix returned by getNodeFrame(). See getNodeFrame().

Return type

LMatrix4d

getNodeFrameInvPtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getNodeFrameInv() matrix.

Return type

LMatrix4d

getNodeFramePtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getNodeFrame() matrix.

Return type

LMatrix4d

getNodeToVertex() → LMatrix4d

Returns the transformation matrix suitable for converting vertices in the coordinate space of the node to the appropriate coordinate space for storing in the egg file. This is the same thing as:

getNodeFrame() * getVertexFrameInv()

Return type

LMatrix4d

getNodeToVertexPtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getNodeToVertex() matrix.

Return type

LMatrix4d

getParent() → EggGroupNode
Return type

EggGroupNode

getVertexFrame() → LMatrix4d

Returns the coordinate frame of the vertices referenced by primitives at or under this node. This is not the same as getNodeFrame().

Generally, vertices in an egg file are stored in the global coordinate space, regardless of the transforms defined at each node. Thus, getVertexFrame() will usually return the identity transform (global coordinate space). However, primitives under an <Instance> entry reference their vertices in the coordinate system under effect at the time of the <Instance>. Thus, nodes under an <Instance> entry may return this non- identity matrix.

Specifically, this may return a non-identity matrix only if isLocalCoord() is true.

Return type

LMatrix4d

getVertexFrameInv() → LMatrix4d

Returns the inverse of the matrix returned by getVertexFrame(). See getVertexFrame().

Return type

LMatrix4d

getVertexFrameInvPtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getVertexFrameInv() matrix.

Return type

LMatrix4d

getVertexFramePtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getVertexFrame() matrix.

Return type

LMatrix4d

getVertexToNode() → LMatrix4d

Returns the transformation matrix suitable for converting the vertices as read from the egg file into the coordinate space of the node. This is the same thing as:

getVertexFrame() * getNodeFrameInv()

Return type

LMatrix4d

getVertexToNodePtr() → LMatrix4d

Returns either a NULL pointer or a unique pointer shared by nodes with the same getVertexToNode() matrix.

Return type

LMatrix4d

isAnimMatrix() → bool

Returns true if this node represents a table of animation transformation data, false otherwise.

isJoint() → bool

Returns true if this particular node represents a <Joint> entry or not. This is a handy thing to know since Joints are sorted to the end of their sibling list when writing an egg file. See EggGroupNode::write().

isLocalCoord() → bool

Returns true if this node’s vertices are not in the global coordinate space. This will be the case if there was an <Instance> node under a transform at or above this node.

isUnderInstance() → bool

Returns true if there is an <Instance> node somewhere in the egg tree at or above this node, false otherwise.

isUnderTransform() → bool

Returns true if there is a <Transform> entry somewhere in the egg tree at or above this node, false otherwise.

property parent
Return type

EggGroupNode

parseEgg(egg_syntax: str) → bool

Parses the egg syntax given in the indicate string as if it had been read from the egg file within this object’s definition. Updates the object accordingly. Returns true if successful, false if there was some parse error or if the object does not support this functionality.

renameNode(strip_prefix: vector_string) → int

Rename by stripping out the prefix

testUnderIntegrity() → None
transform(mat: LMatrix4d) → None

Applies the indicated transformation to the node and all of its descendants.

transformVerticesOnly(mat: LMatrix4d) → None

Applies the indicated transformation only to vertices that appear in global space within vertex pools at this node and below. Joints and other transforms are not affected, nor are local vertices.

write(out: ostream, indent_level: int) → None