pfHsplineCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
NAME
pfGetHsplineCurve2dClassType, pfNewHsplineCurve2d,
pfGetHsplineCurve2dKnotCount, pfHsplineCurve2dPoint,
pfHsplineCurve2dTangent, pfHsplineCurve2dKnot, pfGetHsplineCurve2dPoint,
pfGetHsplineCurve2dTangent, pfGetHsplineCurve2dKnot,
pfHsplineCurve2dEvalPt - A two-dimensional Hermite curve
FUNCTION SPECIFICATION
#include <Performer/pf.h>
pfType * pfGetHsplineCurve2dClassType(void);
pfHsplineCurve2d * pfNewHsplineCurve2d(void *arena);
int -
pfGetHsplineCurve2dKnotCount(pfHsplineCurve2d *curve);
void pfHsplineCurve2dPoint(pfHsplineCurve2d *curve,
int i, pfVec2 &pt);
void pfHsplineCurve2dTangent(pfHsplineCurve2d *curve,
int i, pfVec2 &tng);
void pfHsplineCurve2dKnot(pfHsplineCurve2d *curve, int i,
pfReal t);
pfVec2* pfGetHsplineCurve2dPoint(pfHsplineCurve2d *curve,
int i);
pfVec2* pfGetHsplineCurve2dTangent(pfHsplineCurve2d *curve,
int i);
pfReal pfGetHsplineCurve2dKnot(pfHsplineCurve2d *curve,
int i);
void pfHsplineCurve2dEvalPt(pfHsplineCurve2d *curve,
pfReal t, pfVec2 &pt);
PARENT CLASS FUNCTIONS
The OpenGL Performer class pfHsplineCurve2d is derived from the parent
class pfCurve2d, so each of these member functions of class pfCurve2d are
also directly usable with objects of class pfHsplineCurve2d. Casting an
object of class pfHsplineCurve2d to an object of class pfCurve2d is taken
care of automatically. This is also true for casts to objects of
ancestor classes of class pfCurve2d.
void pfCurve2dBeginT(pfCurve2d *curve, pfReal t);
void pfCurve2dEndT(pfCurve2d *curve, pfReal t);
pfReal pfGetCurve2dBeginT(pfCurve2d *curve);
pfReal pfGetCurve2dEndT(pfCurve2d *curve);
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pfHsplineCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
void pfCurve2dSetClosed(pfCurve2d *curve, pfLoop loopVal);
pfLoop pfGetCurve2dClosed(pfCurve2d *curve);
void pfCurve2dClosedTol(pfCurve2d *curve, pfReal tol);
pfReal pfGetCurve2dClosedTol(pfCurve2d *curve);
void pfCurve2dEvalPt(pfCurve2d *curve, pfReal t, pfVec2 &pt);
void pfCurve2dEvalTan(pfCurve2d *curve, pfReal t, pfVec2 &pt);
void pfCurve2dEvalNorm(pfCurve2d *curve, pfReal t, pfVec2 &pt);
void pfCurve2dEvalCurv(pfCurve2d *curve, pfReal *curv);
void pfCurve2dEvalAll(pfCurve2d *curve, pfReal t, pfVec2 &pt,
pfVec2 &tan, pfReal *curv, pfVec2 norm);
Since the class pfCurve2d is itself derived from the parent class pfRep,
objects of class pfHsplineCurve2d can also be used with these functions
designed for objects of class pfRep.
void pfRepOrigin(pfRep *rep, const pfVec3 origin);
void pfRepOrient(pfRep *rep, const pfMatrix mat);
void pfGetRepOrigin(pfRep *rep, pfVec3* origin);
void pfGetRepOrient(pfRep *rep, pfMatrix *mat);
Since the class pfRep is itself derived from the parent class pfGeode,
objects of class pfHsplineCurve2d can also be used with these functions
designed for objects of class pfGeode.
int pfAddGSet(pfGeode* geode, pfGeoSet* gset);
int pfRemoveGSet(pfGeode* geode, pfGeoSet* gset);
int pfInsertGSet(pfGeode* geode, int index, pfGeoSet* gset);
int pfReplaceGSet(pfGeode* geode, pfGeoSet* old, pfGeoSet* new);
pfGeoSet * pfGetGSet(const pfGeode* geode, int index);
int pfGetNumGSets(const pfGeode* geode);
Since the class pfGeode is itself derived from the parent class pfNode,
objects of class pfHsplineCurve2d can also be used with these functions
designed for objects of class pfNode.
pfGroup * pfGetParent(const pfNode *node, int i);
int pfGetNumParents(const pfNode *node);
void pfNodeBSphere(pfNode *node, pfSphere *bsph, int mode);
int pfGetNodeBSphere(pfNode *node, pfSphere *bsph);
pfNode* pfClone(pfNode *node, int mode);
pfNode* pfBufferClone(pfNode *node, int mode, pfBuffer *buf);
int pfFlatten(pfNode *node, int mode);
int pfNodeName(pfNode *node, const char *name);
const char * pfGetNodeName(const pfNode *node);
pfNode* pfFindNode(pfNode *node, const char *pathName,
pfType *type);
pfNode* pfLookupNode(const char *name, pfType* type);
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pfHsplineCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
int pfNodeIsectSegs(pfNode *node, pfSegSet *segSet,
pfHit **hits[]);
void pfNodeTravMask(pfNode *node, int which, uint mask,
int setMode, int bitOp);
uint pfGetNodeTravMask(const pfNode *node, int which);
void pfNodeTravFuncs(pfNode* node, int which,
pfNodeTravFuncType pre, pfNodeTravFuncType post);
void pfGetNodeTravFuncs(const pfNode* node, int which,
pfNodeTravFuncType *pre, pfNodeTravFuncType *post);
void pfNodeTravData(pfNode *node, int which, void *data);
void * pfGetNodeTravData(const pfNode *node, int which);
void pfNodeTravMode(pfNode* node, int which, int mode,
int val);
int pfGetNodeTravMode(const pfNode* node, int which,
int mode);
Since the class pfNode is itself derived from the parent class pfObject,
objects of class pfHsplineCurve2d can also be used with these functions
designed for objects of class pfObject.
void pfUserDataSlot(pfObject *obj, int slot, void *data);
void pfUserData(pfObject *obj, void *data);
void* pfGetUserDataSlot(pfObject *obj, int slot);
void* pfGetUserData(pfObject *obj);
int pfGetNumUserData(pfObject *obj);
int pfGetNamedUserDataSlot(const char *name);
const char* pfGetUserDataSlotName(int slot);
int pfGetNumNamedUserDataSlots(void);
int pfDeleteGLHandle(pfObject *obj);
Since the class pfObject is itself derived from the parent class
pfMemory, objects of class pfHsplineCurve2d can also be used with these
functions designed for objects of class pfMemory.
pfType * pfGetType(const void *ptr);
int pfIsOfType(const void *ptr, pfType *type);
int pfIsExactType(const void *ptr, pfType *type);
const char * pfGetTypeName(const void *ptr);
int pfRef(void *ptr);
int pfUnref(void *ptr);
int pfUnrefDelete(void *ptr);
int pfUnrefGetRef(void *ptr);
int pfGetRef(const void *ptr);
int pfCopy(void *dst, void *src);
int pfDelete(void *ptr);
int pfIsFluxed(void *ptr);
int pfCompare(const void *ptr1, const void *ptr2);
void pfPrint(const void *ptr, uint which, uint verbose,
FILE *file);
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pfHsplineCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
void * pfGetArena(void *ptr);
DESCRIPTION
pfHsplineCurve2d defines a two dimensional Hermite curve, parameterized
by t. A Hermite curve is defined by a list of knot values knot, the
points of the curve at these knot values p, and the tangents of the curve
at these knot values t. Notice that the name 't' is used for both the
parameterization and for the tangents. The domain of the Hermite curve
is [beginT, endT], both are members of its superclass pfCurve2d.
pfGetHsplineCurve2dClassType returns the pfType* for the class
pfHsplineCurve2d. The pfType* returned by pfGetHsplineCurve2dClassType
is the same as the pfType* returned by invoking pfGetType on any instance
of class pfHsplineCurve2d. Because OpenGL Performer allows subclassing
of built-in types, when decisions are made based on the type of an
object, it is usually better to use pfIsOfType to test if an object is of
a type derived from a Performer type rather than to test for strict
equality of the pfType*'s.
pfNewHsplineCurve2d creates an instance of an pfHsplineCurve2d. Creates
an instance of pfHsplineCurve2d. The inherited member beginT is set to
tBegin and endT set to tEnd. The default values of beginT and endT are
0.0 and 1.0. The inherited member dt is set to endT - beginT) *
pfRep::functionTol as explained in pfCurve2d.
pfGetHsplineCurve2dKnotCount returns the number of knots.
pfHsplineCurve2dPoint Sets the i'th component p to be p.
pfHsplineCurve2dTangent Sets the i'th component of the t to be t.
pfHsplineCurve2dKnot Sets the i'th component of the knot to be t.
pfGetHsplineCurve2dPoint returns a pointer to the i'th component of array
p.
pfGetHsplineCurve2dTangent returns a pointer to the i'th component to
array t.
pfGetHsplineCurve2dKnot returns the i'th knot value.
pfHsplineCurve2dEvalPt Evaluates the curve at parameter t. The evaluated
point is stored in pnt.
SEE ALSO
pfRep, pfGeode, pfCurve2d
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