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#include "F_Interpolate.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void Interpolate_callback(Interpolate* self, struct FrameContext* fc) {
if (self->interpolate == NULL) {
fprintf(stderr, "Interpolation function cannot be NULL!\n");
return;
}
double p = (double)(fc->frame - fc->startFrame) / (fc->endFrame - fc->startFrame);
if (0.0 <= p && p <= 1.0)
self->interpolate(self->value, self->startValue, self->endValue, p);
}
FrameCallback* Interpolate_setup(Interpolate obj) {
FrameCallback* fca = malloc(sizeof(struct FrameCallback));
fca->callback = (FrameCallback_callback)Interpolate_callback;
fca->callback_self = malloc(sizeof(obj));
memcpy(fca->callback_self, &obj, sizeof(obj));
return fca;
}
#define NUM_INTERPOLATE(a, b, perc) ((a) * (1.0 - (perc)) + (b) * (perc))
void Interpolate_TransformCenter(TransformCenter* value, const TransformCenter* start, const TransformCenter* end, double progress) {
value->centerX = NUM_INTERPOLATE(start->centerX, end->centerX, progress);
value->centerY = NUM_INTERPOLATE(start->centerY, end->centerY, progress);
}
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