diff options
Diffstat (limited to 'source/blender/blenkernel/intern/fcurve.c')
| -rw-r--r-- | source/blender/blenkernel/intern/fcurve.c | 256 |
1 files changed, 130 insertions, 126 deletions
diff --git a/source/blender/blenkernel/intern/fcurve.c b/source/blender/blenkernel/intern/fcurve.c index 27ca6332cdc..e52c63d1b21 100644 --- a/source/blender/blenkernel/intern/fcurve.c +++ b/source/blender/blenkernel/intern/fcurve.c @@ -1,5 +1,5 @@ /** - * $Id: fcurve.c 21023 2009-06-20 04:02:49Z aligorith $ + * $Id$ * * ***** BEGIN GPL LICENSE BLOCK ***** * @@ -1314,11 +1314,6 @@ static FModifierTypeInfo FMI_MODNAME = { * 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])) - * 2) simple builin 'functions': - * of the form (y = C[0] * fn( C[1]*x + C[2] ) + C[3]) - * where fn() can be any one of: - * sin, cos, tan, ln, sqrt - * 3) expression... */ static void fcm_generator_free (FModifier *fcm) @@ -1409,44 +1404,10 @@ static void fcm_generator_verify (FModifier *fcm) data->arraysize= data->poly_order * 2; } } - break; - - case FCM_GENERATOR_FUNCTION: /* builtin function */ - { - /* arraysize needs to be 4*/ - if (data->arraysize != 4) { - float *nc; - - /* free the old data */ - if (data->coefficients) - MEM_freeN(data->coefficients); - - /* make new coefficients array, and init using default values */ - nc= data->coefficients= MEM_callocN(sizeof(float)*4, "FMod_Generator_Coefs"); - data->arraysize= 4; - - nc[0]= 1.0f; - nc[1]= 1.0f; - nc[2]= 0.0f; - nc[3]= 0.0f; - } - } break; } } -/* 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_generator_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, float evaltime) { FMod_Generator *data= (FMod_Generator *)fcm->data; @@ -1509,86 +1470,6 @@ static void fcm_generator_evaluate (FCurve *fcu, FModifier *fcm, float *cvalue, } } break; - - case FCM_GENERATOR_FUNCTION: /* builtin function */ - { - double arg= data->coefficients[1]*evaltime + data->coefficients[2]; - 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->func_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->func_type); - } - - /* execute function callback to set value if appropriate */ - if (fn) { - float value= (float)(data->coefficients[0]*fn(arg) + data->coefficients[3]); - - if (data->flag & FCM_GENERATOR_ADDITIVE) - *cvalue += value; - else - *cvalue= value; - } - } - break; - -#ifndef DISABLE_PYTHON - case FCM_GENERATOR_EXPRESSION: /* py-expression */ - // TODO... - break; -#endif /* DISABLE_PYTHON */ } } @@ -1607,6 +1488,128 @@ static FModifierTypeInfo FMI_GENERATOR = { 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) @@ -2081,12 +2084,13 @@ static void fmods_init_typeinfo () { fmodifiersTypeInfo[0]= NULL; /* 'Null' F-Curve Modifier */ fmodifiersTypeInfo[1]= &FMI_GENERATOR; /* Generator F-Curve Modifier */ - fmodifiersTypeInfo[2]= &FMI_ENVELOPE; /* Envelope F-Curve Modifier */ - fmodifiersTypeInfo[3]= &FMI_CYCLES; /* Cycles F-Curve Modifier */ - fmodifiersTypeInfo[4]= &FMI_NOISE; /* Apply-Noise F-Curve Modifier */ - fmodifiersTypeInfo[5]= NULL/*&FMI_FILTER*/; /* Filter F-Curve Modifier */ // XXX unimplemented - fmodifiersTypeInfo[6]= &FMI_PYTHON; /* Custom Python F-Curve Modifier */ - fmodifiersTypeInfo[7]= &FMI_LIMITS; /* Limits 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 */ } /* This function should be used for getting the appropriate type-info when only |