diff options
Diffstat (limited to 'source/blender/blenkernel/intern/fmodifier.c')
| -rw-r--r-- | source/blender/blenkernel/intern/fmodifier.c | 118 |
1 files changed, 96 insertions, 22 deletions
diff --git a/source/blender/blenkernel/intern/fmodifier.c b/source/blender/blenkernel/intern/fmodifier.c index cee6d59488f..5829d462011 100644 --- a/source/blender/blenkernel/intern/fmodifier.c +++ b/source/blender/blenkernel/intern/fmodifier.c @@ -32,29 +32,19 @@ #include <string.h> #include <float.h> -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - #include "MEM_guardedalloc.h" #include "DNA_anim_types.h" #include "BLI_blenlib.h" -#include "BLI_math.h" -#include "BLI_noise.h" +#include "BLI_math.h" /* windows needs for M_PI */ #include "BKE_fcurve.h" -#include "BKE_curve.h" -#include "BKE_global.h" #include "BKE_idprop.h" #include "BKE_utildefines.h" -#include "RNA_access.h" -#include "RNA_types.h" - #ifndef DISABLE_PYTHON -#include "BPY_extern.h" /* for BPY_pydriver_eval() */ +#include "BPY_extern.h" /* for BPY_eval_driver() */ #endif #define SMALL -1.0e-10 @@ -311,10 +301,10 @@ static void fcm_fn_generator_new_data (void *mdata) */ static double sinc (double x) { - if (fabs(x) < 0.0001) - return 1.0; - else - return sin(M_PI * x) / (M_PI * x); + if (fabs(x) < 0.0001) + return 1.0; + else + return sin(M_PI * x) / (M_PI * x); } static void fcm_fn_generator_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime) @@ -871,6 +861,59 @@ static FModifierTypeInfo FMI_LIMITS = { fcm_limits_evaluate /* evaluate */ }; +/* Stepped F-Curve Modifier --------------------------- */ + +static void fcm_stepped_new_data (void *mdata) +{ + FMod_Stepped *data= (FMod_Stepped *)mdata; + + /* just need to set the step-size to 2-frames by default */ + // XXX: or would 5 be more normal? + data->step_size = 2.0f; +} + +static float fcm_stepped_time (FCurve *fcu, FModifier *fcm, float cvalue, float evaltime) +{ + FMod_Stepped *data= (FMod_Stepped *)fcm->data; + int snapblock; + + /* check range clamping to see if we should alter the timing to achieve the desired results */ + if (data->flag & FCM_STEPPED_NO_BEFORE) { + if (evaltime < data->start_frame) + return evaltime; + } + if (data->flag & FCM_STEPPED_NO_AFTER) { + if (evaltime > data->end_frame) + return evaltime; + } + + /* we snap to the start of the previous closest block of 'step_size' frames + * after the start offset has been discarded + * - i.e. round down + */ + snapblock = (int)((evaltime - data->offset) / data->step_size); + + /* reapply the offset, and multiple the snapblock by the size of the steps to get + * the new time to evaluate at + */ + return ((float)snapblock * data->step_size) + data->offset; +} + +static FModifierTypeInfo FMI_STEPPED = { + FMODIFIER_TYPE_STEPPED, /* type */ + sizeof(FMod_Limits), /* size */ + FMI_TYPE_GENERATE_CURVE, /* action type */ /* XXX... err... */ + FMI_REQUIRES_RUNTIME_CHECK, /* requirements */ + "Stepped", /* name */ + "FMod_Stepped", /* struct name */ + NULL, /* free data */ + NULL, /* copy data */ + fcm_stepped_new_data, /* new data */ + NULL, /* verify */ + fcm_stepped_time, /* evaluate time */ + NULL /* evaluate */ +}; + /* F-Curve Modifier API --------------------------- */ /* All of the F-Curve Modifier api functions use FModifierTypeInfo structs to carry out * and operations that involve F-Curve modifier specific code. @@ -892,6 +935,7 @@ static void fmods_init_typeinfo () fmodifiersTypeInfo[6]= NULL/*&FMI_FILTER*/; /* Filter F-Curve Modifier */ // XXX unimplemented fmodifiersTypeInfo[7]= &FMI_PYTHON; /* Custom Python F-Curve Modifier */ fmodifiersTypeInfo[8]= &FMI_LIMITS; /* Limits F-Curve Modifier */ + fmodifiersTypeInfo[9]= &FMI_STEPPED; /* Stepped F-Curve Modifier */ } /* This function should be used for getting the appropriate type-info when only @@ -968,6 +1012,31 @@ FModifier *add_fmodifier (ListBase *modifiers, int type) return fcm; } +/* Make a copy of the specified F-Modifier */ +FModifier *copy_fmodifier (FModifier *src) +{ + FModifierTypeInfo *fmi= fmodifier_get_typeinfo(src); + FModifier *dst; + + /* sanity check */ + if (src == NULL) + return NULL; + + /* copy the base data, clearing the links */ + dst = MEM_dupallocN(src); + dst->next = dst->prev = NULL; + + /* make a new copy of the F-Modifier's data */ + dst->data = MEM_dupallocN(src->data); + + /* only do specific constraints if required */ + if (fmi && fmi->copy_data) + fmi->copy_data(dst, src); + + /* return the new modifier */ + return dst; +} + /* Duplicate all of the F-Modifiers in the Modifier stacks */ void copy_fmodifiers (ListBase *dst, ListBase *src) { @@ -1132,14 +1201,20 @@ short list_has_suitable_fmodifier (ListBase *modifiers, int mtype, short acttype float evaluate_time_fmodifiers (ListBase *modifiers, FCurve *fcu, float cvalue, float evaltime) { FModifier *fcm; - float m_evaltime= evaltime; /* sanity checks */ if ELEM(NULL, modifiers, modifiers->last) return evaltime; - /* find the first modifier from end of stack that modifies time, and calculate the time the modifier - * would calculate time at + /* Starting from the end of the stack, calculate the time effects of various stacked modifiers + * on the time the F-Curve should be evaluated at. + * + * This is done in reverse order to standard evaluation, as when this is done in standard + * order, each modifier would cause jumps to other points in the curve, forcing all + * previous ones to be evaluated again for them to be correct. However, if we did in the + * reverse order as we have here, we can consider them a macro to micro type of waterfall + * effect, which should get us the desired effects when using layered time manipulations + * (such as multiple 'stepped' modifiers in sequence, causing different stepping rates) */ for (fcm= modifiers->last; fcm; fcm= fcm->prev) { FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm); @@ -1148,13 +1223,12 @@ float evaluate_time_fmodifiers (ListBase *modifiers, FCurve *fcu, float cvalue, // TODO: implement the 'influence' control feature... if (fmi && fmi->evaluate_modifier_time) { if ((fcm->flag & (FMODIFIER_FLAG_DISABLED|FMODIFIER_FLAG_MUTED)) == 0) - m_evaltime= fmi->evaluate_modifier_time(fcu, fcm, cvalue, evaltime); - break; + evaltime= fmi->evaluate_modifier_time(fcu, fcm, cvalue, evaltime); } } /* return the modified evaltime */ - return m_evaltime; + return evaltime; } /* Evalautes the given set of F-Curve Modifiers using the given data |