#include "water_motion.h"
#include <cassert>
#include <cmath>
#include <cstdio>
int main() {
	mtgodot::WaterMotion m;
	assert(m.sample(100, 2000, 15) == 0);
	assert(m.sample(400, 2000, 15) == 0);
	assert(m.sample(401, 2000, 15) == 0);
	assert(std::abs(m.sample(1401, 2000, 15) + .075) < 1e-9);
	assert(std::abs(m.sample(2401, 2000, 15) + .15) < 1e-9);
	assert(std::abs(m.sample(2402, 1000, 15) + .15) < 1e-9);
	assert(std::abs(m.sample(2902, 1000, 15) + .075) < 1e-9);
	assert(m.sample(3402, 1000, 15) == 0);
	// Large frame gaps start at the last rendered height, without overshoot.
	for (uint64_t t = 3403; t < 200000; t += 137) {
		const double y = m.sample(t, 1700, 9);
		assert(y <= 0 && y >= -.15);
	}
	std::puts("PASS: shared linear water motion, endpoints, timing, no overshoot");
}