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|
/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation, Joshua Leung
* All rights reserved.
*
* Contributor(s): Joshua Leung (full recode)
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <math.h>
#include <stdio.h>
#include <stddef.h>
#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 "BKE_math.h" /* windows needs for M_PI */
#include "BKE_fcurve.h"
#include "BKE_idprop.h"
#include "BKE_utildefines.h"
#ifndef DISABLE_PYTHON
#include "BPY_extern.h" /* for BPY_pydriver_eval() */
#endif
#define SMALL -1.0e-10
#define SELECT 1
/* ******************************** F-Modifiers ********************************* */
/* Info ------------------------------- */
/* F-Modifiers are modifiers which operate on F-Curves. However, they can also be defined
* on NLA-Strips to affect all of the F-Curves referenced by the NLA-Strip.
*/
/* Template --------------------------- */
/* Each modifier defines a set of functions, which will be called at the appropriate
* times. In addition to this, each modifier should have a type-info struct, where
* its functions are attached for use.
*/
/* Template for type-info data:
* - make a copy of this when creating new modifiers, and just change the functions
* pointed to as necessary
* - although the naming of functions doesn't matter, it would help for code
* readability, to follow the same naming convention as is presented here
* - any functions that a constraint doesn't need to define, don't define
* for such cases, just use NULL
* - these should be defined after all the functions have been defined, so that
* forward-definitions/prototypes don't need to be used!
* - keep this copy #if-def'd so that future constraints can get based off this
*/
#if 0
static FModifierTypeInfo FMI_MODNAME = {
FMODIFIER_TYPE_MODNAME, /* type */
sizeof(FMod_ModName), /* size */
FMI_TYPE_SOME_ACTION, /* action type */
FMI_REQUIRES_SOME_REQUIREMENT, /* requirements */
"Modifier Name", /* name */
"FMod_ModName", /* struct name */
fcm_modname_free, /* free data */
fcm_modname_relink, /* relink data */
fcm_modname_copy, /* copy data */
fcm_modname_new_data, /* new data */
fcm_modname_verify, /* verify */
fcm_modname_time, /* evaluate time */
fcm_modname_evaluate /* evaluate */
};
#endif
/* Generator F-Curve Modifier --------------------------- */
/* Generators available:
* 1) simple polynomial generator:
* - Exanded form - (y = C[0]*(x^(n)) + C[1]*(x^(n-1)) + ... + C[n])
* - Factorised form - (y = (C[0][0]*x + C[0][1]) * (C[1][0]*x + C[1][1]) * ... * (C[n][0]*x + C[n][1]))
*/
static void fcm_generator_free (FModifier *fcm)
{
FMod_Generator *data= (FMod_Generator *)fcm->data;
/* free polynomial coefficients array */
if (data->coefficients)
MEM_freeN(data->coefficients);
}
static void fcm_generator_copy (FModifier *fcm, FModifier *src)
{
FMod_Generator *gen= (FMod_Generator *)fcm->data;
FMod_Generator *ogen= (FMod_Generator *)src->data;
/* copy coefficients array? */
if (ogen->coefficients)
gen->coefficients= MEM_dupallocN(ogen->coefficients);
}
static void fcm_generator_new_data (void *mdata)
{
FMod_Generator *data= (FMod_Generator *)mdata;
float *cp;
/* set default generator to be linear 0-1 (gradient = 1, y-offset = 0) */
data->poly_order= 1;
data->arraysize= 2;
cp= data->coefficients= MEM_callocN(sizeof(float)*2, "FMod_Generator_Coefs");
cp[0] = 0; // y-offset
cp[1] = 1; // gradient
}
static void fcm_generator_verify (FModifier *fcm)
{
FMod_Generator *data= (FMod_Generator *)fcm->data;
/* requirements depend on mode */
switch (data->mode) {
case FCM_GENERATOR_POLYNOMIAL: /* expanded polynomial expression */
{
/* arraysize needs to be order+1, so resize if not */
if (data->arraysize != (data->poly_order+1)) {
float *nc;
/* make new coefficients array, and copy over as much data as can fit */
nc= MEM_callocN(sizeof(float)*(data->poly_order+1), "FMod_Generator_Coefs");
if (data->coefficients) {
if (data->arraysize > (data->poly_order+1))
memcpy(nc, data->coefficients, sizeof(float)*(data->poly_order+1));
else
memcpy(nc, data->coefficients, sizeof(float)*data->arraysize);
/* free the old data */
MEM_freeN(data->coefficients);
}
/* set the new data */
data->coefficients= nc;
data->arraysize= data->poly_order+1;
}
}
break;
case FCM_GENERATOR_POLYNOMIAL_FACTORISED: /* expanded polynomial expression */
{
/* arraysize needs to be 2*order, so resize if not */
if (data->arraysize != (data->poly_order * 2)) {
float *nc;
/* make new coefficients array, and copy over as much data as can fit */
nc= MEM_callocN(sizeof(float)*(data->poly_order*2), "FMod_Generator_Coefs");
if (data->coefficients) {
if (data->arraysize > (data->poly_order * 2))
memcpy(nc, data->coefficients, sizeof(float)*(data->poly_order * 2));
else
memcpy(nc, data->coefficients, sizeof(float)*data->arraysize);
/* free the old data */
MEM_freeN(data->coefficients);
}
/* set the new data */
data->coefficients= nc;
data->arraysize= data->poly_order * 2;
}
}
break;
}
}
static void fcm_generator_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
FMod_Generator *data= (FMod_Generator *)fcm->data;
/* behaviour depends on mode
* NOTE: the data in its default state is fine too
*/
switch (data->mode) {
case FCM_GENERATOR_POLYNOMIAL: /* expanded polynomial expression */
{
/* we overwrite cvalue with the sum of the polynomial */
float *powers = MEM_callocN(sizeof(float)*data->arraysize, "Poly Powers");
float value= 0.0f;
unsigned int i;
/* for each x^n, precalculate value based on previous one first... this should be
* faster that calling pow() for each entry
*/
for (i=0; i < data->arraysize; i++) {
/* first entry is x^0 = 1, otherwise, calculate based on previous */
if (i)
powers[i]= powers[i-1] * evaltime;
else
powers[0]= 1;
}
/* for each coefficient, add to value, which we'll write to *cvalue in one go */
for (i=0; i < data->arraysize; i++)
value += data->coefficients[i] * powers[i];
/* only if something changed, write *cvalue in one go */
if (data->poly_order) {
if (data->flag & FCM_GENERATOR_ADDITIVE)
*cvalue += value;
else
*cvalue= value;
}
/* cleanup */
if (powers)
MEM_freeN(powers);
}
break;
case FCM_GENERATOR_POLYNOMIAL_FACTORISED: /* factorised polynomial */
{
float value= 1.0f, *cp=NULL;
unsigned int i;
/* for each coefficient pair, solve for that bracket before accumulating in value by multiplying */
for (cp=data->coefficients, i=0; (cp) && (i < data->poly_order); cp+=2, i++)
value *= (cp[0]*evaltime + cp[1]);
/* only if something changed, write *cvalue in one go */
if (data->poly_order) {
if (data->flag & FCM_GENERATOR_ADDITIVE)
*cvalue += value;
else
*cvalue= value;
}
}
break;
}
}
static FModifierTypeInfo FMI_GENERATOR = {
FMODIFIER_TYPE_GENERATOR, /* type */
sizeof(FMod_Generator), /* size */
FMI_TYPE_GENERATE_CURVE, /* action type */
FMI_REQUIRES_NOTHING, /* requirements */
"Generator", /* name */
"FMod_Generator", /* struct name */
fcm_generator_free, /* free data */
fcm_generator_copy, /* copy data */
fcm_generator_new_data, /* new data */
fcm_generator_verify, /* verify */
NULL, /* evaluate time */
fcm_generator_evaluate /* evaluate */
};
/* Built-In Function Generator F-Curve Modifier --------------------------- */
/* This uses the general equation for equations:
* y = amplitude * fn(phase_multiplier*x + phase_offset) + y_offset
*
* where amplitude, phase_multiplier/offset, y_offset are user-defined coefficients,
* x is the evaluation 'time', and 'y' is the resultant value
*
* Functions available are
* sin, cos, tan, sinc (normalised sin), natural log, square root
*/
static void fcm_fn_generator_new_data (void *mdata)
{
FMod_FunctionGenerator *data= (FMod_FunctionGenerator *)mdata;
/* set amplitude and phase multiplier to 1.0f so that something is generated */
data->amplitude= 1.0f;
data->phase_multiplier= 1.0f;
}
/* Unary 'normalised sine' function
* y = sin(PI + x) / (PI * x),
* except for x = 0 when y = 1.
*/
static double sinc (double 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)
{
FMod_FunctionGenerator *data= (FMod_FunctionGenerator *)fcm->data;
double arg= data->phase_multiplier*evaltime + data->phase_offset;
double (*fn)(double v) = NULL;
/* get function pointer to the func to use:
* WARNING: must perform special argument validation hereto guard against crashes
*/
switch (data->type)
{
/* simple ones */
case FCM_GENERATOR_FN_SIN: /* sine wave */
fn= sin;
break;
case FCM_GENERATOR_FN_COS: /* cosine wave */
fn= cos;
break;
case FCM_GENERATOR_FN_SINC: /* normalised sine wave */
fn= sinc;
break;
/* validation required */
case FCM_GENERATOR_FN_TAN: /* tangent wave */
{
/* check that argument is not on one of the discontinuities (i.e. 90deg, 270 deg, etc) */
if IS_EQ(fmod((arg - M_PI_2), M_PI), 0.0) {
if ((data->flag & FCM_GENERATOR_ADDITIVE) == 0)
*cvalue = 0.0f; /* no value possible here */
}
else
fn= tan;
}
break;
case FCM_GENERATOR_FN_LN: /* natural log */
{
/* check that value is greater than 1? */
if (arg > 1.0f) {
fn= log;
}
else {
if ((data->flag & FCM_GENERATOR_ADDITIVE) == 0)
*cvalue = 0.0f; /* no value possible here */
}
}
break;
case FCM_GENERATOR_FN_SQRT: /* square root */
{
/* no negative numbers */
if (arg > 0.0f) {
fn= sqrt;
}
else {
if ((data->flag & FCM_GENERATOR_ADDITIVE) == 0)
*cvalue = 0.0f; /* no value possible here */
}
}
break;
default:
printf("Invalid Function-Generator for F-Modifier - %d \n", data->type);
}
/* execute function callback to set value if appropriate */
if (fn) {
float value= (float)(data->amplitude*fn(arg) + data->value_offset);
if (data->flag & FCM_GENERATOR_ADDITIVE)
*cvalue += value;
else
*cvalue= value;
}
}
static FModifierTypeInfo FMI_FN_GENERATOR = {
FMODIFIER_TYPE_FN_GENERATOR, /* type */
sizeof(FMod_FunctionGenerator), /* size */
FMI_TYPE_GENERATE_CURVE, /* action type */
FMI_REQUIRES_NOTHING, /* requirements */
"Built-In Function", /* name */
"FMod_FunctionGenerator", /* struct name */
NULL, /* free data */
NULL, /* copy data */
fcm_fn_generator_new_data, /* new data */
NULL, /* verify */
NULL, /* evaluate time */
fcm_fn_generator_evaluate /* evaluate */
};
/* Envelope F-Curve Modifier --------------------------- */
static void fcm_envelope_free (FModifier *fcm)
{
FMod_Envelope *env= (FMod_Envelope *)fcm->data;
/* free envelope data array */
if (env->data)
MEM_freeN(env->data);
}
static void fcm_envelope_copy (FModifier *fcm, FModifier *src)
{
FMod_Envelope *env= (FMod_Envelope *)fcm->data;
FMod_Envelope *oenv= (FMod_Envelope *)src->data;
/* copy envelope data array */
if (oenv->data)
env->data= MEM_dupallocN(oenv->data);
}
static void fcm_envelope_new_data (void *mdata)
{
FMod_Envelope *env= (FMod_Envelope *)mdata;
/* set default min/max ranges */
env->min= -1.0f;
env->max= 1.0f;
}
static void fcm_envelope_verify (FModifier *fcm)
{
FMod_Envelope *env= (FMod_Envelope *)fcm->data;
/* if the are points, perform bubble-sort on them, as user may have changed the order */
if (env->data) {
// XXX todo...
}
}
static void fcm_envelope_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
FMod_Envelope *env= (FMod_Envelope *)fcm->data;
FCM_EnvelopeData *fed, *prevfed, *lastfed;
float min=0.0f, max=0.0f, fac=0.0f;
int a;
/* get pointers */
if (env->data == NULL) return;
prevfed= env->data;
fed= prevfed + 1;
lastfed= prevfed + (env->totvert-1);
/* get min/max values for envelope at evaluation time (relative to mid-value) */
if (prevfed->time >= evaltime) {
/* before or on first sample, so just extend value */
min= prevfed->min;
max= prevfed->max;
}
else if (lastfed->time <= evaltime) {
/* after or on last sample, so just extend value */
min= lastfed->min;
max= lastfed->max;
}
else {
/* evaltime occurs somewhere between segments */
// TODO: implement binary search for this to make it faster?
for (a=0; prevfed && fed && (a < env->totvert-1); a++, prevfed=fed, fed++) {
/* evaltime occurs within the interval defined by these two envelope points */
if ((prevfed->time <= evaltime) && (fed->time >= evaltime)) {
float afac, bfac, diff;
diff= fed->time - prevfed->time;
afac= (evaltime - prevfed->time) / diff;
bfac= (fed->time - evaltime) / diff;
min= bfac*prevfed->min + afac*fed->min;
max= bfac*prevfed->max + afac*fed->max;
break;
}
}
}
/* adjust *cvalue
* - fac is the ratio of how the current y-value corresponds to the reference range
* - thus, the new value is found by mapping the old range to the new!
*/
fac= (*cvalue - (env->midval + env->min)) / (env->max - env->min);
*cvalue= min + fac*(max - min);
}
static FModifierTypeInfo FMI_ENVELOPE = {
FMODIFIER_TYPE_ENVELOPE, /* type */
sizeof(FMod_Envelope), /* size */
FMI_TYPE_REPLACE_VALUES, /* action type */
0, /* requirements */
"Envelope", /* name */
"FMod_Envelope", /* struct name */
fcm_envelope_free, /* free data */
fcm_envelope_copy, /* copy data */
fcm_envelope_new_data, /* new data */
fcm_envelope_verify, /* verify */
NULL, /* evaluate time */
fcm_envelope_evaluate /* evaluate */
};
/* Cycles F-Curve Modifier --------------------------- */
/* This modifier changes evaltime to something that exists within the curve's frame-range,
* then re-evaluates modifier stack up to this point using the new time. This re-entrant behaviour
* is very likely to be more time-consuming than the original approach... (which was tighly integrated into
* the calculation code...).
*
* NOTE: this needs to be at the start of the stack to be of use, as it needs to know the extents of the keyframes/sample-data
* Possible TODO - store length of cycle information that can be initialised from the extents of the keyframes/sample-data, and adjusted
* as appropriate
*/
/* temp data used during evaluation */
typedef struct tFCMED_Cycles {
float cycyofs; /* y-offset to apply */
} tFCMED_Cycles;
static void fcm_cycles_new_data (void *mdata)
{
FMod_Cycles *data= (FMod_Cycles *)mdata;
/* turn on cycles by default */
data->before_mode= data->after_mode= FCM_EXTRAPOLATE_CYCLIC;
}
static float fcm_cycles_time (FCurve *fcu, FModifier *fcm, float cvalue, float evaltime)
{
FMod_Cycles *data= (FMod_Cycles *)fcm->data;
float prevkey[2], lastkey[2], cycyofs=0.0f;
short side=0, mode=0;
int cycles=0;
/* check if modifier is first in stack, otherwise disable ourself... */
// FIXME...
if (fcm->prev) {
fcm->flag |= FMODIFIER_FLAG_DISABLED;
return evaltime;
}
/* calculate new evaltime due to cyclic interpolation */
if (fcu && fcu->bezt) {
BezTriple *prevbezt= fcu->bezt;
BezTriple *lastbezt= prevbezt + fcu->totvert-1;
prevkey[0]= prevbezt->vec[1][0];
prevkey[1]= prevbezt->vec[1][1];
lastkey[0]= lastbezt->vec[1][0];
lastkey[1]= lastbezt->vec[1][1];
}
else if (fcu && fcu->fpt) {
FPoint *prevfpt= fcu->fpt;
FPoint *lastfpt= prevfpt + fcu->totvert-1;
prevkey[0]= prevfpt->vec[0];
prevkey[1]= prevfpt->vec[1];
lastkey[0]= lastfpt->vec[0];
lastkey[1]= lastfpt->vec[1];
}
else
return evaltime;
/* check if modifier will do anything
* 1) if in data range, definitely don't do anything
* 2) if before first frame or after last frame, make sure some cycling is in use
*/
if (evaltime < prevkey[0]) {
if (data->before_mode) {
side= -1;
mode= data->before_mode;
cycles= data->before_cycles;
}
}
else if (evaltime > lastkey[0]) {
if (data->after_mode) {
side= 1;
mode= data->after_mode;
cycles= data->after_cycles;
}
}
if ELEM(0, side, mode)
return evaltime;
/* find relative place within a cycle */
{
float cycdx=0, cycdy=0, ofs=0;
float cycle= 0;
/* ofs is start frame of cycle */
ofs= prevkey[0];
/* calculate period and amplitude (total height) of a cycle */
cycdx= lastkey[0] - prevkey[0];
cycdy= lastkey[1] - prevkey[1];
/* check if cycle is infinitely small, to be point of being impossible to use */
if (cycdx == 0)
return evaltime;
/* calculate the 'number' of the cycle */
cycle= ((float)side * (evaltime - ofs) / cycdx);
/* check that cyclic is still enabled for the specified time */
if (cycles == 0) {
/* catch this case so that we don't exit when we have cycles=0
* as this indicates infinite cycles...
*/
}
else if (cycle > (cycles+1)) {
/* we are too far away from range to evaluate
* TODO: but we should still hold last value...
*/
return evaltime;
}
/* check if 'cyclic extrapolation', and thus calculate y-offset for this cycle */
if (mode == FCM_EXTRAPOLATE_CYCLIC_OFFSET) {
cycyofs = (float)floor((evaltime - ofs) / cycdx);
cycyofs *= cycdy;
}
/* calculate where in the cycle we are (overwrite evaltime to reflect this) */
if ((mode == FCM_EXTRAPOLATE_MIRROR) && ((int)(cycle) % 2)) {
/* when 'mirror' option is used and cycle number is odd, this cycle is played in reverse
* - for 'before' extrapolation, we need to flip in a different way, otherwise values past
* then end of the curve get referenced (result of fmod will be negative, and with different phase)
*/
if (side < 0)
evaltime= (float)(prevkey[0] - fmod(evaltime-ofs, cycdx));
else
evaltime= (float)(lastkey[0] - fmod(evaltime-ofs, cycdx));
}
else {
/* the cycle is played normally... */
evaltime= (float)(fmod(evaltime-ofs, cycdx) + ofs);
}
if (evaltime < ofs) evaltime += cycdx;
}
/* store temp data if needed */
if (mode == FCM_EXTRAPOLATE_CYCLIC_OFFSET) {
tFCMED_Cycles *edata;
/* for now, this is just a float, but we could get more stuff... */
fcm->edata= edata= MEM_callocN(sizeof(tFCMED_Cycles), "tFCMED_Cycles");
edata->cycyofs= cycyofs;
}
/* return the new frame to evaluate */
return evaltime;
}
static void fcm_cycles_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
tFCMED_Cycles *edata= (tFCMED_Cycles *)fcm->edata;
/* use temp data */
if (edata) {
/* add cyclic offset - no need to check for now, otherwise the data wouldn't exist! */
*cvalue += edata->cycyofs;
/* free temp data */
MEM_freeN(edata);
fcm->edata= NULL;
}
}
static FModifierTypeInfo FMI_CYCLES = {
FMODIFIER_TYPE_CYCLES, /* type */
sizeof(FMod_Cycles), /* size */
FMI_TYPE_EXTRAPOLATION, /* action type */
FMI_REQUIRES_ORIGINAL_DATA, /* requirements */
"Cycles", /* name */
"FMod_Cycles", /* struct name */
NULL, /* free data */
NULL, /* copy data */
fcm_cycles_new_data, /* new data */
NULL /*fcm_cycles_verify*/, /* verify */
fcm_cycles_time, /* evaluate time */
fcm_cycles_evaluate /* evaluate */
};
/* Noise F-Curve Modifier --------------------------- */
static void fcm_noise_new_data (void *mdata)
{
FMod_Noise *data= (FMod_Noise *)mdata;
/* defaults */
data->size= 1.0f;
data->strength= 1.0f;
data->phase= 1.0f;
data->depth = 0;
data->modification = FCM_NOISE_MODIF_REPLACE;
}
static void fcm_noise_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
FMod_Noise *data= (FMod_Noise *)fcm->data;
float noise;
/* generate noise using good ol' Blender Noise
* - 0.1 is passed as the 'z' value, otherwise evaluation fails for size = phase = 1
* with evaltime being an integer (which happens when evaluating on frame by frame basis)
*/
noise = BLI_turbulence(data->size, evaltime, data->phase, 0.1f, data->depth);
/* combine the noise with existing motion data */
switch (data->modification) {
case FCM_NOISE_MODIF_ADD:
*cvalue= *cvalue + noise * data->strength;
break;
case FCM_NOISE_MODIF_SUBTRACT:
*cvalue= *cvalue - noise * data->strength;
break;
case FCM_NOISE_MODIF_MULTIPLY:
*cvalue= *cvalue * noise * data->strength;
break;
case FCM_NOISE_MODIF_REPLACE:
default:
*cvalue= *cvalue + (noise - 0.5f) * data->strength;
break;
}
}
static FModifierTypeInfo FMI_NOISE = {
FMODIFIER_TYPE_NOISE, /* type */
sizeof(FMod_Noise), /* size */
FMI_TYPE_REPLACE_VALUES, /* action type */
0, /* requirements */
"Noise", /* name */
"FMod_Noise", /* struct name */
NULL, /* free data */
NULL, /* copy data */
fcm_noise_new_data, /* new data */
NULL /*fcm_noise_verify*/, /* verify */
NULL, /* evaluate time */
fcm_noise_evaluate /* evaluate */
};
/* Filter F-Curve Modifier --------------------------- */
#if 0 // XXX not yet implemented
static FModifierTypeInfo FMI_FILTER = {
FMODIFIER_TYPE_FILTER, /* type */
sizeof(FMod_Filter), /* size */
FMI_TYPE_REPLACE_VALUES, /* action type */
0, /* requirements */
"Filter", /* name */
"FMod_Filter", /* struct name */
NULL, /* free data */
NULL, /* copy data */
NULL, /* new data */
NULL /*fcm_filter_verify*/, /* verify */
NULL, /* evlauate time */
fcm_filter_evaluate /* evaluate */
};
#endif // XXX not yet implemented
/* Python F-Curve Modifier --------------------------- */
static void fcm_python_free (FModifier *fcm)
{
FMod_Python *data= (FMod_Python *)fcm->data;
/* id-properties */
IDP_FreeProperty(data->prop);
MEM_freeN(data->prop);
}
static void fcm_python_new_data (void *mdata)
{
FMod_Python *data= (FMod_Python *)mdata;
/* everything should be set correctly by calloc, except for the prop->type constant.*/
data->prop = MEM_callocN(sizeof(IDProperty), "PyFModifierProps");
data->prop->type = IDP_GROUP;
}
static void fcm_python_copy (FModifier *fcm, FModifier *src)
{
FMod_Python *pymod = (FMod_Python *)fcm->data;
FMod_Python *opymod = (FMod_Python *)src->data;
pymod->prop = IDP_CopyProperty(opymod->prop);
}
static void fcm_python_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
#ifndef DISABLE_PYTHON
//FMod_Python *data= (FMod_Python *)fcm->data;
/* FIXME... need to implement this modifier...
* It will need it execute a script using the custom properties
*/
#endif /* DISABLE_PYTHON */
}
static FModifierTypeInfo FMI_PYTHON = {
FMODIFIER_TYPE_PYTHON, /* type */
sizeof(FMod_Python), /* size */
FMI_TYPE_GENERATE_CURVE, /* action type */
FMI_REQUIRES_RUNTIME_CHECK, /* requirements */
"Python", /* name */
"FMod_Python", /* struct name */
fcm_python_free, /* free data */
fcm_python_copy, /* copy data */
fcm_python_new_data, /* new data */
NULL /*fcm_python_verify*/, /* verify */
NULL /*fcm_python_time*/, /* evaluate time */
fcm_python_evaluate /* evaluate */
};
/* Limits F-Curve Modifier --------------------------- */
static float fcm_limits_time (FCurve *fcu, FModifier *fcm, float cvalue, float evaltime)
{
FMod_Limits *data= (FMod_Limits *)fcm->data;
/* check for the time limits */
if ((data->flag & FCM_LIMIT_XMIN) && (evaltime < data->rect.xmin))
return data->rect.xmin;
if ((data->flag & FCM_LIMIT_XMAX) && (evaltime > data->rect.xmax))
return data->rect.xmax;
/* modifier doesn't change time */
return evaltime;
}
static void fcm_limits_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime)
{
FMod_Limits *data= (FMod_Limits *)fcm->data;
/* value limits now */
if ((data->flag & FCM_LIMIT_YMIN) && (*cvalue < data->rect.ymin))
*cvalue= data->rect.ymin;
if ((data->flag & FCM_LIMIT_YMAX) && (*cvalue > data->rect.ymax))
*cvalue= data->rect.ymax;
}
static FModifierTypeInfo FMI_LIMITS = {
FMODIFIER_TYPE_LIMITS, /* type */
sizeof(FMod_Limits), /* size */
FMI_TYPE_GENERATE_CURVE, /* action type */ /* XXX... err... */
FMI_REQUIRES_RUNTIME_CHECK, /* requirements */
"Limits", /* name */
"FMod_Limits", /* struct name */
NULL, /* free data */
NULL, /* copy data */
NULL, /* new data */
NULL, /* verify */
fcm_limits_time, /* evaluate time */
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.
*/
/* These globals only ever get directly accessed in this file */
static FModifierTypeInfo *fmodifiersTypeInfo[FMODIFIER_NUM_TYPES];
static short FMI_INIT= 1; /* when non-zero, the list needs to be updated */
/* This function only gets called when FMI_INIT is non-zero */
static void fmods_init_typeinfo ()
{
fmodifiersTypeInfo[0]= NULL; /* 'Null' F-Curve Modifier */
fmodifiersTypeInfo[1]= &FMI_GENERATOR; /* Generator F-Curve Modifier */
fmodifiersTypeInfo[2]= &FMI_FN_GENERATOR; /* Built-In Function Generator F-Curve Modifier */
fmodifiersTypeInfo[3]= &FMI_ENVELOPE; /* Envelope F-Curve Modifier */
fmodifiersTypeInfo[4]= &FMI_CYCLES; /* Cycles F-Curve Modifier */
fmodifiersTypeInfo[5]= &FMI_NOISE; /* Apply-Noise F-Curve Modifier */
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
* a F-Curve modifier type is known
*/
FModifierTypeInfo *get_fmodifier_typeinfo (int type)
{
/* initialise the type-info list? */
if (FMI_INIT) {
fmods_init_typeinfo();
FMI_INIT = 0;
}
/* only return for valid types */
if ( (type >= FMODIFIER_TYPE_NULL) &&
(type <= FMODIFIER_NUM_TYPES ) )
{
/* there shouldn't be any segfaults here... */
return fmodifiersTypeInfo[type];
}
else {
printf("No valid F-Curve Modifier type-info data available. Type = %i \n", type);
}
return NULL;
}
/* This function should always be used to get the appropriate type-info, as it
* has checks which prevent segfaults in some weird cases.
*/
FModifierTypeInfo *fmodifier_get_typeinfo (FModifier *fcm)
{
/* only return typeinfo for valid modifiers */
if (fcm)
return get_fmodifier_typeinfo(fcm->type);
else
return NULL;
}
/* API --------------------------- */
/* Add a new F-Curve Modifier to the given F-Curve of a certain type */
FModifier *add_fmodifier (ListBase *modifiers, int type)
{
FModifierTypeInfo *fmi= get_fmodifier_typeinfo(type);
FModifier *fcm;
/* sanity checks */
if ELEM(NULL, modifiers, fmi)
return NULL;
/* special checks for whether modifier can be added */
if ((modifiers->first) && (type == FMODIFIER_TYPE_CYCLES)) {
/* cycles modifier must be first in stack, so for now, don't add if it can't be */
// TODO: perhaps there is some better way, but for now,
printf("Error: Cannot add 'Cycles' modifier to F-Curve, as 'Cycles' modifier can only be first in stack. \n");
return NULL;
}
/* add modifier itself */
fcm= MEM_callocN(sizeof(FModifier), "F-Curve Modifier");
fcm->type = type;
fcm->flag = FMODIFIER_FLAG_EXPANDED;
BLI_addtail(modifiers, fcm);
/* add modifier's data */
fcm->data= MEM_callocN(fmi->size, fmi->structName);
/* init custom settings if necessary */
if (fmi->new_data)
fmi->new_data(fcm->data);
/* return modifier for further editing */
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)
{
FModifier *fcm, *srcfcm;
if ELEM(NULL, dst, src)
return;
dst->first= dst->last= NULL;
BLI_duplicatelist(dst, src);
for (fcm=dst->first, srcfcm=src->first; fcm && srcfcm; srcfcm=srcfcm->next, fcm=fcm->next) {
FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm);
/* make a new copy of the F-Modifier's data */
fcm->data = MEM_dupallocN(fcm->data);
/* only do specific constraints if required */
if (fmi && fmi->copy_data)
fmi->copy_data(fcm, srcfcm);
}
}
/* Remove and free the given F-Modifier from the given stack */
int remove_fmodifier (ListBase *modifiers, FModifier *fcm)
{
FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm);
/* sanity check */
if (fcm == NULL)
return 0;
/* free modifier's special data (stored inside fcm->data) */
if (fcm->data) {
if (fmi && fmi->free_data)
fmi->free_data(fcm);
/* free modifier's data (fcm->data) */
MEM_freeN(fcm->data);
}
/* remove modifier from stack */
if (modifiers) {
BLI_freelinkN(modifiers, fcm);
return 1;
}
else {
// XXX this case can probably be removed some day, as it shouldn't happen...
printf("remove_fmodifier() - no modifier stack given \n");
MEM_freeN(fcm);
return 0;
}
}
/* Remove and free the nth F-Modifier from the given stack */
int remove_fmodifier_index (ListBase *modifiers, int index)
{
FModifier *fcm= BLI_findlink(modifiers, index);
return remove_fmodifier(modifiers, fcm);
}
/* Remove all of a given F-Curve's modifiers */
void free_fmodifiers (ListBase *modifiers)
{
FModifier *fcm, *fmn;
/* sanity check */
if (modifiers == NULL)
return;
/* free each modifier in order - modifier is unlinked from list and freed */
for (fcm= modifiers->first; fcm; fcm= fmn) {
fmn= fcm->next;
remove_fmodifier(modifiers, fcm);
}
}
/* Find the active F-Modifier */
FModifier *find_active_fmodifier (ListBase *modifiers)
{
FModifier *fcm;
/* sanity checks */
if ELEM(NULL, modifiers, modifiers->first)
return NULL;
/* loop over modifiers until 'active' one is found */
for (fcm= modifiers->first; fcm; fcm= fcm->next) {
if (fcm->flag & FMODIFIER_FLAG_ACTIVE)
return fcm;
}
/* no modifier is active */
return NULL;
}
/* Set the active F-Modifier */
void set_active_fmodifier (ListBase *modifiers, FModifier *fcm)
{
FModifier *fm;
/* sanity checks */
if ELEM(NULL, modifiers, modifiers->first)
return;
/* deactivate all, and set current one active */
for (fm= modifiers->first; fm; fm= fm->next)
fm->flag &= ~FMODIFIER_FLAG_ACTIVE;
/* make given modifier active */
if (fcm)
fcm->flag |= FMODIFIER_FLAG_ACTIVE;
}
/* Do we have any modifiers which match certain criteria
* - mtype - type of modifier (if 0, doesn't matter)
* - acttype - type of action to perform (if -1, doesn't matter)
*/
short list_has_suitable_fmodifier (ListBase *modifiers, int mtype, short acttype)
{
FModifier *fcm;
/* if there are no specific filtering criteria, just skip */
if ((mtype == 0) && (acttype == 0))
return (modifiers && modifiers->first);
/* sanity checks */
if ELEM(NULL, modifiers, modifiers->first)
return 0;
/* find the first mdifier fitting these criteria */
for (fcm= modifiers->first; fcm; fcm= fcm->next) {
FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm);
short mOk=1, aOk=1; /* by default 1, so that when only one test, won't fail */
/* check if applicable ones are fullfilled */
if (mtype)
mOk= (fcm->type == mtype);
if (acttype > -1)
aOk= (fmi->acttype == acttype);
/* if both are ok, we've found a hit */
if (mOk && aOk)
return 1;
}
/* no matches */
return 0;
}
/* Evaluation API --------------------------- */
/* evaluate time modifications imposed by some F-Curve Modifiers
* - this step acts as an optimisation to prevent the F-Curve stack being evaluated
* several times by modifiers requesting the time be modified, as the final result
* would have required using the modified time
* - modifiers only ever recieve the unmodified time, as subsequent modifiers should be
* working on the 'global' result of the modified curve, not some localised segment,
* so nevaltime gets set to whatever the last time-modifying modifier likes...
* - we start from the end of the stack, as only the last one matters for now
*/
float evaluate_time_fmodifiers (ListBase *modifiers, FCurve *fcu, float cvalue, float evaltime)
{
FModifier *fcm;
/* sanity checks */
if ELEM(NULL, modifiers, modifiers->last)
return evaltime;
/* 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);
/* only evaluate if there's a callback for this */
// TODO: implement the 'influence' control feature...
if (fmi && fmi->evaluate_modifier_time) {
if ((fcm->flag & (FMODIFIER_FLAG_DISABLED|FMODIFIER_FLAG_MUTED)) == 0)
evaltime= fmi->evaluate_modifier_time(fcu, fcm, cvalue, evaltime);
}
}
/* return the modified evaltime */
return evaltime;
}
/* Evalautes the given set of F-Curve Modifiers using the given data
* Should only be called after evaluate_time_fmodifiers() has been called...
*/
void evaluate_value_fmodifiers (ListBase *modifiers, FCurve *fcu, float *cvalue, float evaltime)
{
FModifier *fcm;
/* sanity checks */
if ELEM(NULL, modifiers, modifiers->first)
return;
/* evaluate modifiers */
for (fcm= modifiers->first; fcm; fcm= fcm->next) {
FModifierTypeInfo *fmi= fmodifier_get_typeinfo(fcm);
/* only evaluate if there's a callback for this */
// TODO: implement the 'influence' control feature...
if (fmi && fmi->evaluate_modifier) {
if ((fcm->flag & (FMODIFIER_FLAG_DISABLED|FMODIFIER_FLAG_MUTED)) == 0)
fmi->evaluate_modifier(fcu, fcm, cvalue, evaltime);
}
}
}
/* ---------- */
/* Bake modifiers for given F-Curve to curve sample data, in the frame range defined
* by start and end (inclusive).
*/
void fcurve_bake_modifiers (FCurve *fcu, int start, int end)
{
ChannelDriver *driver;
/* sanity checks */
// TODO: make these tests report errors using reports not printf's
if ELEM(NULL, fcu, fcu->modifiers.first) {
printf("Error: No F-Curve with F-Curve Modifiers to Bake\n");
return;
}
/* temporarily, disable driver while we sample, so that they don't influence the outcome */
driver= fcu->driver;
fcu->driver= NULL;
/* bake the modifiers, by sampling the curve at each frame */
fcurve_store_samples(fcu, NULL, start, end, fcurve_samplingcb_evalcurve);
/* free the modifiers now */
free_fmodifiers(&fcu->modifiers);
/* restore driver */
fcu->driver= driver;
}
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