175 lines
6.3 KiB
C
175 lines
6.3 KiB
C
/* Testing code for new animation system in 2.5
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* Copyright 2009, Joshua Leung
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*/
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#ifndef BKE_FCURVE_H
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#define BKE_FCURVE_H
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//struct ListBase;
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struct FCurve;
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struct FModifier;
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struct ChannelDriver;
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struct DriverTarget;
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struct BezTriple;
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/* ************** Keyframe Tools ***************** */
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// XXX this stuff is defined in BKE_ipo.h too, so maybe skip for now?
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typedef struct CfraElem {
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struct CfraElem *next, *prev;
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float cfra;
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int sel;
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} CfraElem;
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void bezt_add_to_cfra_elem(ListBase *lb, struct BezTriple *bezt);
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/* ************** F-Curve Drivers ***************** */
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void fcurve_free_driver(struct FCurve *fcu);
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struct ChannelDriver *fcurve_copy_driver(struct ChannelDriver *driver);
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void driver_free_target(struct ChannelDriver *driver, struct DriverTarget *dtar);
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struct DriverTarget *driver_add_new_target(struct ChannelDriver *driver);
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float driver_get_target_value(struct ChannelDriver *driver, struct DriverTarget *dtar);
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/* ************** F-Curve Modifiers *************** */
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/* F-Curve Modifier Type-Info (fmi):
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* This struct provides function pointers for runtime, so that functions can be
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* written more generally (with fewer/no special exceptions for various modifiers).
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*
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* Callers of these functions must check that they actually point to something useful,
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* as some constraints don't define some of these.
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*
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* Warning: it is not too advisable to reorder order of members of this struct,
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* as you'll have to edit quite a few ($FMODIFIER_NUM_TYPES) of these
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* structs.
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*/
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typedef struct FModifierTypeInfo {
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/* admin/ident */
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short type; /* FMODIFIER_TYPE_### */
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short size; /* size in bytes of the struct */
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short acttype; /* eFMI_Action_Types */
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short requires; /* eFMI_Requirement_Flags */
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char name[32]; /* name of modifier in interface */
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char structName[32]; /* name of struct for SDNA */
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/* data management function pointers - special handling */
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/* free any data that is allocated separately (optional) */
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void (*free_data)(struct FModifier *fcm);
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/* copy any special data that is allocated separately (optional) */
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void (*copy_data)(struct FModifier *fcm, struct FModifier *src);
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/* set settings for data that will be used for FCuModifier.data (memory already allocated using MEM_callocN) */
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void (*new_data)(void *mdata);
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/* verifies that the modifier settings are valid */
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void (*verify_data)(struct FModifier *fcm);
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/* evaluation */
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/* evaluate the modifier for the given time and 'accumulated' value */
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void (*evaluate_modifier)(struct FCurve *fcu, struct FModifier *fcm, float *cvalue, float evaltime);
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} FModifierTypeInfo;
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/* Values which describe the behaviour of a FModifier Type */
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enum {
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/* modifier only modifies values outside of data range */
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FMI_TYPE_EXTRAPOLATION = 0,
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/* modifier leaves data-points alone, but adjusts the interpolation between and around them */
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FMI_TYPE_INTERPOLATION,
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/* modifier only modifies the values of points (but times stay the same) */
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FMI_TYPE_REPLACE_VALUES,
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/* modifier generates a curve regardless of what came before */
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FMI_TYPE_GENERATE_CURVE,
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} eFMI_Action_Types;
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/* Flags for the requirements of a FModifier Type */
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enum {
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/* modifier requires original data-points (kindof beats the purpose of a modifier stack?) */
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FMI_REQUIRES_ORIGINAL_DATA = (1<<0),
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/* modifier doesn't require on any preceeding data (i.e. it will generate a curve).
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* Use in conjunction with FMI_TYPE_GENRATE_CURVE
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*/
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FMI_REQUIRES_NOTHING = (1<<1),
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/* refer to modifier instance */
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FMI_REQUIRES_RUNTIME_CHECK = (1<<2),
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} eFMI_Requirement_Flags;
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/* Function Prototypes for FModifierTypeInfo's */
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FModifierTypeInfo *fmodifier_get_typeinfo(struct FModifier *fcm);
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FModifierTypeInfo *get_fmodifier_typeinfo(int type);
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/* ---------------------- */
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struct FModifier *fcurve_add_modifier(struct FCurve *fcu, int type);
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void fcurve_copy_modifiers(ListBase *dst, ListBase *src);
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void fcurve_remove_modifier(struct FCurve *fcu, struct FModifier *fcm);
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void fcurve_free_modifiers(struct FCurve *fcu);
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void fcurve_bake_modifiers(struct FCurve *fcu, int start, int end);
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struct FModifier *fcurve_find_active_modifier(struct FCurve *fcu);
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void fcurve_set_active_modifier(struct FCurve *fcu, struct FModifier *fcm);
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/* ************** F-Curves API ******************** */
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/* -------- Data Managemnt -------- */
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void free_fcurve(struct FCurve *fcu);
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struct FCurve *copy_fcurve(struct FCurve *fcu);
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void free_fcurves(ListBase *list);
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void copy_fcurves(ListBase *dst, ListBase *src);
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/* find matching F-Curve in the given list of F-Curves */
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struct FCurve *list_find_fcurve(ListBase *list, const char rna_path[], const int array_index);
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/* test if there is a keyframe at cfra */
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int on_keyframe_fcurve(struct FCurve *fcu, float cfra);
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/* get the time extents for F-Curve */
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void calc_fcurve_range(struct FCurve *fcu, float *min, float *max);
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/* get the bounding-box extents for F-Curve */
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void calc_fcurve_bounds(struct FCurve *fcu, float *xmin, float *xmax, float *ymin, float *ymax);
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/* -------- Curve Sanity -------- */
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void calchandles_fcurve(struct FCurve *fcu);
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void testhandles_fcurve(struct FCurve *fcu);
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void sort_time_fcurve(struct FCurve *fcu);
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short test_time_fcurve(struct FCurve *fcu);
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void correct_bezpart(float *v1, float *v2, float *v3, float *v4);
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/* -------- Evaluation -------- */
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/* evaluate fcurve */
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float evaluate_fcurve(struct FCurve *fcu, float evaltime);
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/* evaluate fcurve and store value */
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void calculate_fcurve(struct FCurve *fcu, float ctime);
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/* ************* F-Curve Samples API ******************** */
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/* -------- Defines -------- */
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/* Basic signature for F-Curve sample-creation function
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* - fcu: the F-Curve being operated on
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* - data: pointer to some specific data that may be used by one of the callbacks
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*/
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typedef float (*FcuSampleFunc)(struct FCurve *fcu, void *data, float evaltime);
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/* ----- Sampling Callbacks ------ */
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/* Basic sampling callback which acts as a wrapper for evaluate_fcurve() */
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float fcurve_samplingcb_evalcurve(struct FCurve *fcu, void *data, float evaltime);
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/* -------- Main Methods -------- */
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/* Main API function for creating a set of sampled curve data, given some callback function
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* used to retrieve the values to store.
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*/
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void fcurve_store_samples(struct FCurve *fcu, void *data, int start, int end, FcuSampleFunc sample_cb);
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#endif /* BKE_FCURVE_H*/
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