VuoCurve.c

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#include <string.h>
#include "VuoCurve.h"
 
#ifdef VUO_COMPILER
VuoModuleMetadata({
                     "title" : "Curve",
                     "description" : "Type of curve.",
                     "keywords" : [ ],
                     "version" : "1.0.0",
                     "dependencies" : [
                        "VuoList_VuoCurve",
                        "VuoCurveEasing",
                        "VuoLoopType",
                        "VuoPoint2d",
                        "VuoPoint3d",
                        "VuoReal"
                     ]
                 });
#endif
 
VuoCurve VuoCurve_makeFromJson(json_object *js)
{
    const char *valueAsString = "";
    if (json_object_get_type(js) == json_type_string)
        valueAsString = json_object_get_string(js);
 
    if (strcmp(valueAsString, "quadratic") == 0)
        return VuoCurve_Quadratic;
    else if (strcmp(valueAsString, "cubic") == 0)
        return VuoCurve_Cubic;
    else if (strcmp(valueAsString, "circular") == 0)
        return VuoCurve_Circular;
    else if (strcmp(valueAsString, "exponential") == 0)
        return VuoCurve_Exponential;
 
    return VuoCurve_Linear;
}
 
json_object * VuoCurve_getJson(const VuoCurve value)
{
    char *valueAsString = "linear";
 
    if (value == VuoCurve_Quadratic)
        valueAsString = "quadratic";
    else if (value == VuoCurve_Cubic)
        valueAsString = "cubic";
    else if (value == VuoCurve_Circular)
        valueAsString = "circular";
    else if (value == VuoCurve_Exponential)
        valueAsString = "exponential";
 
    return json_object_new_string(valueAsString);
}
 
VuoList_VuoCurve VuoCurve_getAllowedValues(void)
{
    VuoList_VuoCurve l = VuoListCreate_VuoCurve();
    VuoListAppendValue_VuoCurve(l, VuoCurve_Linear);
    VuoListAppendValue_VuoCurve(l, VuoCurve_Quadratic);
    VuoListAppendValue_VuoCurve(l, VuoCurve_Cubic);
    VuoListAppendValue_VuoCurve(l, VuoCurve_Circular);
    VuoListAppendValue_VuoCurve(l, VuoCurve_Exponential);
    return l;
}
 
char * VuoCurve_getSummary(const VuoCurve value)
{
    char *valueAsString = "Linear";
 
    if (value == VuoCurve_Quadratic)
        valueAsString = "Quadratic";
    else if (value == VuoCurve_Cubic)
        valueAsString = "Cubic";
    else if (value == VuoCurve_Circular)
        valueAsString = "Circular";
    else if (value == VuoCurve_Exponential)
        valueAsString = "Exponential";
 
    return strdup(valueAsString);
}
 
VuoReal VuoReal_curve(VuoReal time, VuoReal startPosition, VuoReal endPosition, VuoReal duration, VuoCurve curve, VuoCurveEasing easing, VuoLoopType loop)
{
    if (duration == 0)
        return startPosition;
 
    VuoReal normalizedTime = MIN(MAX(time/duration,0.),1.);
    if (loop == VuoLoopType_Loop)
    {
        normalizedTime = fmod(time/duration, 1);
        if (time < 0)
            normalizedTime = 1. + normalizedTime;
    }
    else if (loop == VuoLoopType_Mirror)
    {
        normalizedTime = fmod(time/duration, 2);
        if (time < 0)
            normalizedTime = 2. + normalizedTime;
        if (normalizedTime > 1)
            normalizedTime = 2. - normalizedTime;
    }
 
    VuoReal x = normalizedTime;
    if (easing == VuoCurveEasing_Out)
        x = normalizedTime - 1.;
    else if (easing == VuoCurveEasing_InOut)
    {
        if (normalizedTime < 0.5)
            x = normalizedTime*2.;
        else
            x = (normalizedTime-1.)*2.;
    }
    else if (easing == VuoCurveEasing_Middle)
    {
        if (normalizedTime < 0.5)
            x = (normalizedTime-0.5)*2.;
        else
            x = (normalizedTime-0.5)*2.;
    }
 
    VuoReal normalizedValue = x;
    if (curve == VuoCurve_Linear)
        normalizedValue = fabs(x);
    else if (curve == VuoCurve_Quadratic)
        normalizedValue = pow(x,2);
    else if (curve == VuoCurve_Cubic)
        normalizedValue = pow(fabs(x),3);
    else if (curve == VuoCurve_Circular)
        normalizedValue = -(sqrt(1.-pow(x,2))-1.);
    else if (curve == VuoCurve_Exponential)
        normalizedValue = pow(2,10.*(fabs(x)-1.));
 
    if (easing == VuoCurveEasing_Out)
        normalizedValue = 1. - normalizedValue;
    else if (easing == VuoCurveEasing_InOut)
    {
        if (normalizedTime < 0.5)
            normalizedValue /= 2.;
        else
            normalizedValue = 1 - normalizedValue/2.;
    }
    else if (easing == VuoCurveEasing_Middle)
    {
        if (normalizedTime < 0.5)
            normalizedValue = (1.-normalizedValue)/2.;
        else
            normalizedValue = (normalizedValue+1.)/2.;
    }
 
    return normalizedValue*(endPosition-startPosition) + startPosition;
}
 
VuoPoint2d VuoPoint2d_curve(VuoReal time, VuoPoint2d startPosition, VuoPoint2d endPosition, VuoReal duration, VuoCurve curve, VuoCurveEasing easing, VuoLoopType loop)
{
    VuoPoint2d p;
    p.x = VuoReal_curve(time, startPosition.x, endPosition.x, duration, curve, easing, loop);
    p.y = VuoReal_curve(time, startPosition.y, endPosition.y, duration, curve, easing, loop);
    return p;
}
 
VuoPoint3d VuoPoint3d_curve(VuoReal time, VuoPoint3d startPosition, VuoPoint3d endPosition, VuoReal duration, VuoCurve curve, VuoCurveEasing easing, VuoLoopType loop)
{
    VuoPoint3d p;
    p.x = VuoReal_curve(time, startPosition.x, endPosition.x, duration, curve, easing, loop);
    p.y = VuoReal_curve(time, startPosition.y, endPosition.y, duration, curve, easing, loop);
    p.z = VuoReal_curve(time, startPosition.z, endPosition.z, duration, curve, easing, loop);
    return p;
}