/* This file is part of Wattzap Community Edition.
*
* Wattzap Community Edtion is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Wattzap Community Edition is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Wattzap. If not, see <http://www.gnu.org/licenses/>.
*/
package com.wattzap.model.power;
/*
* (c) 2014 David George / Wattzap.com
*
* @author David George
* @date 14 August 2014
*
* Cascade Fluid Pro
* mph to kmh = 1.60934, 2.5899752356, 4.168150745660504
*
*
* P = 13.23 * S - 0.51 * S^2 + 0.0237 * S^3 (mph)
* P = 8.26 * S - 0.2 * S^2 + * 0.058 * S^3 (kph)
*
* e.g for 25.91kmh
* P = 84.44 + 79.995
* P = 164 watts
*/
@PowerAnnotation
public class CascadeFluidPro extends Power {
private static final double a = 0.0058;
private static final double b = 0.2;
private static final double c = 8.26;
private static final double d = 0;
private final Cubic cubic = new Cubic();
public int getPower(double speed, int resistance) {
double power = (c * speed) + (a * (speed * speed * speed)) - (b * (speed * speed));
return (int) power;
}
public String toString() {
return "Cascade Fluid Pro";
}
@Override
public int getResistance(double gradient) {
return 1;
}
@Override
public int getResitanceLevels() {
return 1;
}
public double getSpeed(int power, int resistance) {
cubic.solve(a, b, c, d - power);
return cubic.x1;
}
}