EggTransform¶

from panda3d.egg import EggTransform

class EggTransform¶

This represents the <Transform> entry of a group or texture node: a list of component transform operations, applied in order, that describe a net transform matrix.

This may be either a 3-d transform, and therefore described by a 4x4 matrix, or a 2-d transform, described by a 3x3 matrix.

Inheritance diagram

enum ComponentType

enumerator CT_invalid = 0¶

enumerator CT_translate2d = 1¶

enumerator CT_translate3d = 2¶

enumerator CT_rotate2d = 3¶

enumerator CT_rotx = 4¶

enumerator CT_roty = 5¶

enumerator CT_rotz = 6¶

enumerator CT_rotate3d = 7¶

enumerator CT_scale2d = 8¶

enumerator CT_scale3d = 9¶

enumerator CT_uniform_scale = 10¶

enumerator CT_matrix3 = 11¶

enumerator CT_matrix4 = 12¶

__init__()¶

__init__(copy: EggTransform)

addMatrix3(mat: panda3d.core.LMatrix3d)¶: Appends an arbitrary 3x3 matrix to the current transform.

addMatrix4(mat: panda3d.core.LMatrix4d)¶: Appends an arbitrary 4x4 matrix to the current transform.

addRotate2d(angle: float)¶: Appends a 2-d rotation to the current transform. The rotation angle is specified in degrees counterclockwise about the origin.

addRotate3d(quat: panda3d.core.LQuaterniond)¶: Appends an arbitrary 3-d rotation to the current transform, expressed as a quaternion. This is converted to axis-angle notation for the egg file.

addRotate3d(angle: float, axis: panda3d.core.LVector3d): Appends a 3-d rotation about an arbitrary axis to the current transform. The rotation angle is specified in degrees counterclockwise about the axis.

addRotx(angle: float)¶: Appends a rotation about the X axis to the current transform. The rotation angle is specified in degrees counterclockwise about the axis.

addRoty(angle: float)¶: Appends a rotation about the Y axis to the current transform. The rotation angle is specified in degrees counterclockwise about the axis.

addRotz(angle: float)¶: Appends a rotation about the Z axis to the current transform. The rotation angle is specified in degrees counterclockwise about the axis.

addScale2d(scale: panda3d.core.LVecBase2d)¶: Appends a possibly non-uniform scale to the current transform.

addScale3d(scale: panda3d.core.LVecBase3d)¶: Appends a possibly non-uniform scale to the current transform.

addTranslate2d(translate: panda3d.core.LVector2d)¶: Appends a 2-d translation operation to the current transform.

addTranslate3d(translate: panda3d.core.LVector3d)¶: Appends a 3-d translation operation to the current transform.

addUniformScale(scale: float)¶: Appends a uniform scale to the current transform.

assign(copy: EggTransform) → EggTransform ¶

clearTransform()¶: Resets the transform to empty, identity.

getComponentMat3(n: int) → panda3d.core.LMatrix3d ¶: Returns the 3x3 matrix associated with the nth component. It is an error to call this if the component type is not CT_matrix3.

getComponentMat4(n: int) → panda3d.core.LMatrix4d ¶: Returns the 4x4 matrix associated with the nth component. It is an error to call this if the component type is not CT_matrix4.

getComponentNumber(n: int) → float ¶: Returns the solitary number associated with the nth component. In the case of a rotation, this is the angle in degrees to rotate; in the case of uniform scale, this is the amount of the scale. Other types do not use this property.

getComponentType(n: int) → ComponentType¶: Returns the type of the nth component.

getComponentVec2(n: int) → panda3d.core.LVecBase2d ¶: Returns the 2-component vector associated with the nth component. This may be the translate vector, rotate axis, or non-uniform scale. It is an error to call this if the component type does not use a 2-d vector property.

getComponentVec3(n: int) → panda3d.core.LVecBase3d ¶: Returns the 3-component vector associated with the nth component. This may be the translate vector, rotate axis, or non-uniform scale. It is an error to call this if the component type does not use a 3-d vector property.

getNumComponents() → int ¶: Returns the number of components that make up the transform.

getTransform2d() → panda3d.core.LMatrix3d ¶: Returns the overall transform as a 3x3 matrix. It is an error to call this if hasTransform3d() is true.

getTransform3d() → panda3d.core.LMatrix4d ¶: Returns the overall transform as a 4x4 matrix. It is valid to call this even if hasTransform2d() is true; in this case, the 3x3 transform will be expanded to a 4x4 matrix.

hasTransform() → bool ¶: Returns true if the transform is nonempty, false if it is empty (no transform components have been added). This is true for either a 2-d or a 3-d transform.

hasTransform2d() → bool ¶

Returns true if the transform is specified as a 2-d transform, e.g. with a 3x3 matrix, or false if it is specified as a 3-d transform (with a 4x4 matrix), or not specified at all.

Normally, EggTextures have a 2-d matrix (but occasionally they use a 3-d matrix), and EggGroups always have a 3-d matrix.

hasTransform3d() → bool ¶

Returns true if the transform is specified as a 3-d transform, e.g. with a 4x4 matrix, or false if it is specified as a 2-d transform (with a 2x2 matrix), or not specified at all.

Normally, EggTextures have a 3-d matrix (but occasionally they use a 3-d matrix), and EggGroups always have a 3-d matrix.

setTransform2d(mat: panda3d.core.LMatrix3d)¶: Sets the overall transform as a 3x3 matrix. This completely replaces whatever componentwise transform may have been defined.

setTransform3d(mat: panda3d.core.LMatrix4d)¶: Sets the overall transform as a 4x4 matrix. This completely replaces whatever componentwise transform may have been defined.

transformIsIdentity() → bool ¶: Returns true if the described transform is identity, false otherwise.

write(out: panda3d.core.ostream, indent_level: int, label: str)¶: Writes the transform to the indicated stream in Egg format.