#include <Inventor/SbLinear.h>
Public Member Functions | |
SbVec3f (void) | |
SbVec3f (const float v[3]) | |
SbVec3f (const float x, const float y, const float z) | |
SbVec3f (const SbPlane &p0, const SbPlane &p1, const SbPlane &p2) | |
SbVec3f | cross (const SbVec3f &v) const |
float | dot (const SbVec3f &v) const |
SbBool | equals (const SbVec3f &v, const float tolerance) const |
SbVec3f | getClosestAxis (void) const |
const float * | getValue (void) const |
void | getValue (float &x, float &y, float &z) const |
float | length (void) const |
float | sqrLength () const |
void | negate (void) |
float | normalize (void) |
SbVec3f & | setValue (const float v[3]) |
SbVec3f & | setValue (const float x, const float y, const float z) |
SbVec3f & | setValue (const SbVec3f &barycentric, const SbVec3f &v0, const SbVec3f &v1, const SbVec3f &v2) |
float & | operator[] (const int i) |
const float & | operator[] (const int i) const |
SbVec3f & | operator *= (const float d) |
SbVec3f & | operator/= (const float d) |
SbVec3f & | operator+= (const SbVec3f &u) |
SbVec3f & | operator-= (const SbVec3f &u) |
SbVec3f | operator- (void) const |
void | print (FILE *fp) const |
Friends | |
SbVec3f | operator * (const SbVec3f &v, const float d) |
SbVec3f | operator * (const float d, const SbVec3f &v) |
SbVec3f | operator/ (const SbVec3f &v, const float d) |
SbVec3f | operator+ (const SbVec3f &v1, const SbVec3f &v2) |
SbVec3f | operator- (const SbVec3f &v1, const SbVec3f &v2) |
int | operator== (const SbVec3f &v1, const SbVec3f &v2) |
int | operator!= (const SbVec3f &v1, const SbVec3f &v2) |
This vector class is used by many other classes in Coin. It provides storage for a 3 dimensional vector aswell as simple floating point arithmetic operations.
SbVec3f::SbVec3f | ( | void | ) |
The default constructor does nothing. The vector coordinates will be uninitialized until you do a setValue() call.
SbVec3f::SbVec3f | ( | const float | v[3] | ) |
Constructs an SbVec3f instance with initial values from v.
SbVec3f::SbVec3f | ( | const float | x, | |
const float | y, | |||
const float | z | |||
) |
Constructs an SbVec3f instance with the initial vector endpoint set to <x,y,z>.
Constructs an SbVec3f instance by combining the three given planes. None of the planes should be parallel to any of the other two, otherwise a divide by zero error will occur.
Returns the result of taking the cross product of this vector and v.
float SbVec3f::dot | ( | const SbVec3f & | v | ) | const |
Calculates and returns the result of taking the dot product of this vector and v.
SbBool SbVec3f::equals | ( | const SbVec3f & | v, | |
const float | tolerance | |||
) | const |
Compares the vector with v and returns TRUE
if the largest distance between the vectors are larger than the square root of the given tolerance value.
SbVec3f SbVec3f::getClosestAxis | ( | void | ) | const |
Return the vector representing the principal axis closest to this vector.
const float * SbVec3f::getValue | ( | void | ) | const |
Returns a pointer to an array of three floats containing the x, y and z coordinates of the vector.
void SbVec3f::getValue | ( | float & | x, | |
float & | y, | |||
float & | z | |||
) | const |
float SbVec3f::length | ( | void | ) | const |
Return length of vector.
float SbVec3f::sqrLength | ( | void | ) | const |
Returns the squared length of the vector.
void SbVec3f::negate | ( | void | ) |
Negate the vector (i.e. point it in the opposite direction).
float SbVec3f::normalize | ( | void | ) |
Normalize the vector to unit length. Return value is the original length of the vector before normalization.
If the vector is the null vector, no attempt at normalization will be done, and if the Coin library was built in a debug version, this error message will then be shown:
Coin warning in SbVec3f::normalize(): The length of the vector should be > 0.0f to be able to normalize.
We've made Coin spit out a warning when an attempt at normalizing a null-vector is made, as that seems to always be a symptom caused by some graver programming error somewhere else -- either internally in Coin code, or in application code.
If this happens, you should run the application in a debugger and see how the call-stack backtrace looks when it hits. An easy way of getting a debugger break at the warning spot is to set the following debugging environment variable which will make the code assert:
COIN_DEBUG_BREAK="SbVec3f::normalize"
If you from the backtrace analysis strongly suspects an internal Coin bug, please report the call-stack to us at coin-support@coin3d.org and we'll look into it. Example code that triggers the bug would then also be very helpful.
SbVec3f & SbVec3f::setValue | ( | const float | v[3] | ) |
SbVec3f & SbVec3f::setValue | ( | const float | x, | |
const float | y, | |||
const float | z | |||
) |
SbVec3f & SbVec3f::setValue | ( | const SbVec3f & | barycentric, | |
const SbVec3f & | v0, | |||
const SbVec3f & | v1, | |||
const SbVec3f & | v2 | |||
) |
Set this vector to be the average of v0, v1 and v2. The vector components are weighted by the barycentric vector.
float & SbVec3f::operator[] | ( | const int | i | ) | [inline] |
Index operator. Returns modifiable x, y or z coordinate of vector.
float SbVec3f::operator[] | ( | const int | i | ) | const [inline] |
SbVec3f & SbVec3f::operator *= | ( | const float | d | ) |
Multiply components of vector with scalar value d. Returns reference to self.
SbVec3f & SbVec3f::operator/= | ( | const float | d | ) |
Divides components of vector with scalar value d. Returns reference to self.
Adds this vector and vector u. Returns reference to self.
Subtracts vector u from this vector. Returns reference to self.
SbVec3f SbVec3f::operator- | ( | void | ) | const |
void SbVec3f::print | ( | FILE * | fp | ) | const |
Dump the state of this object to the file stream. Only works in debug version of library, method does nothing in an optimized compile.
Returns an SbVec3f instance which is the components of vector v multiplied with d.
Returns an SbVec3f instance which is the components of vector v multiplied with d.
Returns an SbVec3f instance which is the components of vector v divided on the scalar factor d.
Returns an SbVec3f instance which is the sum of vectors v1 and v2.
Returns an SbVec3f instance which is vector v2 subtracted from vector v1.