csReversibleTransform Class Reference
[Geometry utilities]
A class which defines a reversible transformation from one coordinate system to another by maintaining an inverse transformation matrix.
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#include <csgeom/transfrm.h>
Inheritance diagram for csReversibleTransform:

Public Member Functions | |
csReversibleTransform (const csReversibleTransform &t) | |
Initialize with the given transformation. | |
csReversibleTransform (const csTransform &t) | |
Initialize with the given transformation. | |
csReversibleTransform (const csMatrix3 &o2t, const csVector3 &pos) | |
Initialize with the given transformation. | |
csReversibleTransform () | |
Initialize with the identity transformation. | |
csReversibleTransform | GetInverse () const |
Get the inverse of this transform. | |
const csMatrix3 & | GetT2O () const |
Get 'this' to 'other' transformation matrix. | |
csVector3 | GetT2OTranslation () const |
Get 'this' to 'other' translation. | |
void | LookAt (const csVector3 &v, const csVector3 &up) |
Let this transform look at the given (x,y,z) point, using up as the up-vector. | |
void | RotateOther (const csMatrix3 &m) |
Use the given transformation matrix, in other space, to reorient the transformation. | |
void | RotateOther (const csVector3 &v, float angle) |
Rotate the transform by the angle (radians) around the given vector, in other coordinates. | |
void | RotateThis (const csMatrix3 &m) |
Use the given transformation matrix, in this space, to reorient the transformation. | |
void | RotateThis (const csVector3 &v, float angle) |
Rotate the transform by the angle (radians) around the given vector, in these coordinates. | |
virtual void | SetO2T (const csMatrix3 &m) |
Set 'other' to 'this' transformation matrix. | |
virtual void | SetT2O (const csMatrix3 &m) |
Set 'this' to 'other' transformation matrix. | |
csSphere | This2Other (const csSphere &s) const |
Convert a sphere in 'this' space to 'other' space. | |
void | This2Other (const csPlane3 &p, const csVector3 &point, csPlane3 &result) const |
Convert a plane in 'this' space to 'other' space. | |
csPlane3 | This2Other (const csPlane3 &p) const |
Convert a plane in 'this' space to 'other' space. | |
csVector3 | This2Other (const csVector3 &v) const |
Convert vector v in 'this' space to 'other' space. | |
csPlane3 | This2OtherRelative (const csPlane3 &p) const |
Convert a plane in 'this' space to 'other' space. | |
csVector3 | This2OtherRelative (const csVector3 &v) const |
Convert vector v in 'this' space to a vector in 'other' space, relative to local origin. | |
Protected Member Functions | |
csReversibleTransform (const csMatrix3 &o2t, const csMatrix3 &t2o, const csVector3 &pos) | |
Initialize transform with both transform matrix and inverse tranform. | |
Protected Attributes | |
csMatrix3 | m_t2o |
Inverse transformation matrix ('this' to 'other' space). | |
Friends | |
csTransform | operator * (const csTransform &t1, const csReversibleTransform &t2) |
Combine two transforms, rightmost first. | |
csReversibleTransform | operator * (const csReversibleTransform &t1, const csReversibleTransform &t2) |
Combine two transforms, rightmost first. | |
csReversibleTransform & | operator *= (csReversibleTransform &t1, const csReversibleTransform &t2) |
Combine two transforms, rightmost first. | |
csReversibleTransform | operator/ (const csReversibleTransform &t1, const csReversibleTransform &t2) |
Combine two transforms, reversing t2 then applying t1. | |
csSphere | operator/ (const csSphere &p, const csReversibleTransform &t) |
Reverse a transformation on a sphere. | |
csPlane3 | operator/ (const csPlane3 &p, const csReversibleTransform &t) |
Reverse a transformation on a Plane. | |
csVector3 | operator/ (const csVector3 &v, const csReversibleTransform &t) |
Reverse a transformation on a 3D vector. | |
csReversibleTransform & | operator/= (csReversibleTransform &t1, const csReversibleTransform &t2) |
Combine two transforms, reversing t2 then applying t1. | |
csPlane3 & | operator/= (csPlane3 &p, const csReversibleTransform &t) |
Reverse a transformation on a Plane. | |
csVector3 & | operator/= (csVector3 &v, const csReversibleTransform &t) |
Reverse a transformation on a 3D vector. |
Detailed Description
A class which defines a reversible transformation from one coordinate system to another by maintaining an inverse transformation matrix.This version is similar to csTransform (in fact, it is a sub-class) but it is more efficient if you plan to do inverse transformations often.
- Remarks:
- Despite that the superclass csTransform transforms from 'other' to 'this' space, commonly csReversibleTransform instances are named like 'this2other' - e.g. 'object2world' where 'this' space is object space and 'other' space is world space.
Definition at line 335 of file transfrm.h.
Constructor & Destructor Documentation
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Initialize transform with both transform matrix and inverse tranform.
Definition at line 344 of file transfrm.h. |
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Initialize with the identity transformation.
Definition at line 351 of file transfrm.h. |
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Initialize with the given transformation. The transformation is given as a 3x3 matrix and a vector. The transformation is defined to mean T=M*(O-V) with T the vector in 'this' space, O the vector in 'other' space, M the transformation matrix and V the transformation vector. Definition at line 360 of file transfrm.h. |
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Initialize with the given transformation.
Definition at line 366 of file transfrm.h. |
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Initialize with the given transformation.
Definition at line 372 of file transfrm.h. References m_t2o. |
Member Function Documentation
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Get the inverse of this transform.
Definition at line 390 of file transfrm.h. |
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Get 'this' to 'other' transformation matrix. This corresponds to the inverse of M. Definition at line 379 of file transfrm.h. |
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Get 'this' to 'other' translation. This will calculate and return -(M*V). Definition at line 385 of file transfrm.h. |
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Let this transform look at the given (x,y,z) point, using up as the up-vector. 'v' should be given relative to the position of the origin of this transform. For example, if the transform is located at pos=(3,1,9) and you want it to look at location loc=(10,2,8) while keeping the orientation so that the up-vector is upwards then you can use: LookAt (loc-pos, csVector3 (0, 1, 0)). |
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Use the given transformation matrix, in other space, to reorient the transformation. Note: this function rotates the transformation, not the coordinate system. This basically calculates Minv=m*Minv (with Minv the inverse of M). M will be calculated accordingly. Definition at line 477 of file transfrm.h. |
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Rotate the transform by the angle (radians) around the given vector, in other coordinates. Note: this function rotates the transform, not the coordinate system. |
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Use the given transformation matrix, in this space, to reorient the transformation. Note: this function rotates the transformation, not the coordinate system. This basically calculates Minv=Minv*m (with Minv the inverse of M). M will be calculated accordingly. Definition at line 486 of file transfrm.h. |
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Rotate the transform by the angle (radians) around the given vector, in these coordinates. Note: this function rotates the tranform, not the coordinate system. |
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Set 'other' to 'this' transformation matrix. This is the 3x3 matrix M from the transform equation T=M*(O-V). Reimplemented from csTransform. Reimplemented in csOrthoTransform. Definition at line 397 of file transfrm.h. References csMatrix3::GetInverse(). |
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Set 'this' to 'other' transformation matrix. This is equivalent to SetO2T() except that you can now give the inverse matrix. Reimplemented in csOrthoTransform. Definition at line 405 of file transfrm.h. References csMatrix3::GetInverse(). |
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Convert a sphere in 'this' space to 'other' space.
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Convert a plane in 'this' space to 'other' space. This is an optimized version for which a point on the new plane is known (point). The result is stored in 'result'. If 'p' is expressed as (N,D) (with N a vector for the A,B,C components of 'p') then this will return a new plane which looks like (Minv*N,-(Minv*N)*point) (with Minv the inverse of M). |
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Convert a plane in 'this' space to 'other' space. If 'p' is expressed as (N,D) (with N a vector for the A,B,C components of 'p') then this will return a new plane which looks like (Minv*N,D-N*(M*V)) (with Minv the inverse of M). |
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Convert vector v in 'this' space to 'other' space. This is the basic inverse transform operation and it corresponds with the calculation of V+Minv*v (with Minv the inverse of M). Definition at line 413 of file transfrm.h. |
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Convert a plane in 'this' space to 'other' space. This version ignores translation. If 'p' is expressed as (N,D) (with N a vector for the A,B,C components of 'p') then this will return a new plane which looks like (Minv*N,D) (with Minv the inverse of M). |
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Convert vector v in 'this' space to a vector in 'other' space, relative to local origin. This calculates and returns Minv*v (with Minv the inverse of M). Definition at line 421 of file transfrm.h. |
Friends And Related Function Documentation
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Combine two transforms, rightmost first. Given the following definitions:
Then this will calculate a new transformation in 't1' as follows: T=(t1.M*t2.M)*(O-(t2.Minv*t1.V+t2.V)). Reimplemented from csTransform. |
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Combine two transforms, rightmost first. Given the following definitions:
Then this will calculate a new transformation in 't1' as follows: T=(t1.M*t2.M)*(O-(t2.Minv*t1.V+t2.V)). Definition at line 565 of file transfrm.h. |
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Combine two transforms, rightmost first. Given the following definitions:
Then this will calculate a new transformation in 't1' as follows: T=(t1.M*t2.M)*(O-(t2.Minv*t1.V+t2.V)). Definition at line 544 of file transfrm.h. |
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Combine two transforms, reversing t2 then applying t1. Given the following definitions:
Then this will calculate a new transformation in 't1' as follows: T=(t1.M*t2.Minv)*(O-(t2.M*(t1.V-t2.V))). |
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Reverse a transformation on a sphere. This corresponds exactly to calling t.This2Other(p). |
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Reverse a transformation on a Plane. This corresponds exactly to calling t.This2Other(p). |
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Reverse a transformation on a 3D vector. This corresponds exactly to calling t.This2Other(v). |
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Combine two transforms, reversing t2 then applying t1. Given the following definitions:
Then this will calculate a new transformation in 't1' as follows: T=(t1.M*t2.Minv)*(O-(t2.M*(t1.V-t2.V))). |
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Reverse a transformation on a Plane. This corresponds exactly to calling p = t.This2Other(p). |
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Reverse a transformation on a 3D vector. This corresponds exactly to calling v=t.This2Other(v). |
Member Data Documentation
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Inverse transformation matrix ('this' to 'other' space).
Definition at line 339 of file transfrm.h. Referenced by csReversibleTransform(), csOrthoTransform::SetO2T(), and csOrthoTransform::SetT2O(). |
The documentation for this class was generated from the following file:
- csgeom/transfrm.h
Generated for Crystal Space by doxygen 1.4.6