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/*
* Intended to be a _fast_ and simple curve type. :-)
*/
#include "main/linecurve.h"
#include "demolib_prefs.h"
#include "exception.h"
#include <stdio.h>
#if DEMOLIB_MAINLOOP
LineCurve::LineCurve()
{
this->num_points = 0;
}
LineCurve::~LineCurve() {}
void LineCurve::add_curvepoint(float x, float y)
{
this->x[this->num_points] = x;
this->y[this->num_points] = y;
this->num_points++;
}
void LineCurve::end_curvepoints(float start, float length)
{
if (this->num_points < 1 || this->num_points > 2)
throw new FatalException("Need exactly two points for line movement!");
/* just trust that they come in order ;-) */
this->base = this->y[0];
this->step = (this->num_points == 1) ? 0.0f : (this->y[1] - base);
}
float LineCurve::get_value(float x)
{
return this->base + this->step * x;
}
#endif
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