pfSuperQuadCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
NAME
pfGetSuperQuadCurve2dClassType, pfNewSuperQuadCurve2d,
pfSuperQuadCurve2dRadius, pfGetSuperQuadCurve2dRadius,
pfSuperQuadCurve2dExponent, pfGetSuperQuadCurve2dExponent,
pfSuperQuadCurve2dEvalPt - A super quadric 2D curve
FUNCTION SPECIFICATION
#include <Performer/pf.h>
pfType * pfGetSuperQuadCurve2dClassType(void);
pfSuperQuadCurve2d * pfNewSuperQuadCurve2d(void *arena);
void -
pfSuperQuadCurve2dRadius(pfSuperQuadCurve2d *curve,
pfReal radius);
pfReal -
pfGetSuperQuadCurve2dRadius(pfSuperQuadCurve2d *curve);
void -
pfSuperQuadCurve2dExponent(pfSuperQuadCurve2d *curve,
pfReal expn);
pfReal -
pfGetSuperQuadCurve2dExponent(pfSuperQuadCurve2d *curve);
void -
pfSuperQuadCurve2dEvalPt(pfSuperQuadCurve2d *curve,
pfReal t, pfVec2 &pt);
PARENT CLASS FUNCTIONS
The OpenGL Performer class pfSuperQuadCurve2d is derived from the parent
class pfCurve2d, so each of these member functions of class pfCurve2d are
also directly usable with objects of class pfSuperQuadCurve2d. Casting
an object of class pfSuperQuadCurve2d 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);
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);
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pfSuperQuadCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
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 pfSuperQuadCurve2d 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 pfSuperQuadCurve2d 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 pfSuperQuadCurve2d 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);
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);
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pfSuperQuadCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
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 pfSuperQuadCurve2d 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 pfSuperQuadCurve2d 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);
void * pfGetArena(void *ptr);
DESCRIPTION
pfSuperQuadCurve2d defines a two-dimensional parametric curve as the
following:
u(t) = radius * sign(cos(t)) * pow(|cos(t)|, exponent);
v(t) = radius * sign(sin(t)) * pow(|sin(t)|, exponent);
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pfSuperQuadCurve2d(3pf) OpenGL Performer 3.2.2 libpf C Reference Pages
The curve is subject to the transformation of the matrix orientation and
translation of origin, which are inherited members from class pfRep.
pfGetSuperQuadCurve2dClassType returns the pfType* for the class
pfSuperQuadCurve2d. The pfType* returned by
pfGetSuperQuadCurve2dClassType is the same as the pfType* returned by
invoking pfGetType on any instance of class pfSuperQuadCurve2d. 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.
pfNewSuperQuadCurve2d creates an instance of an pfSuperQuadCurve2d. The
radius is initialized to 1, exponent is initialized to 2, beginT is
initialized to 0 and endT is initialized to 2*pi.
pfSuperQuadCurve2dRadius sets the radius value.
pfGetSuperQuadCurve2dRadius returns the radius value.
pfSuperQuadCurve2dExponent sets the exponent value.
pfGetSuperQuadCurve2dExponent returns the radius value.
pfSuperQuadCurve2dEvalPt Evaluates the curve at parameter t. The
resulting point is store in pnt.
SEE ALSO
pfRep, pfGeode, pfCurve2d
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