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/*
TikZiT - a GUI diagram editor for TikZ
Copyright (C) 2018 Aleks Kissinger
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "util.h"
float bezierInterpolate(float dist, float c0, float c1, float c2, float c3) {
float distp = 1 - dist;
return (distp*distp*distp) * c0 +
3 * (distp*distp) * dist * c1 +
3 * (dist*dist) * distp * c2 +
(dist*dist*dist) * c3;
}
QPointF bezierInterpolateFull (float dist, QPointF c0, QPointF c1, QPointF c2, QPointF c3) {
return QPointF(bezierInterpolate (dist, c0.x(), c1.x(), c2.x(), c3.x()),
bezierInterpolate (dist, c0.y(), c1.y(), c2.y(), c3.y()));
}
float roundToNearest(float stepSize, float val) {
if (stepSize==0.0f) return val;
else return round(val/stepSize)*stepSize;
}
float radiansToDegrees (float radians) {
return (radians * 180.0f) / M_PI;
}
float degreesToRadians(float degrees) {
return (degrees * M_PI) / 180.0f;
}
int normaliseAngleDeg (int degrees) {
while (degrees > 180) {
degrees -= 360;
}
while (degrees <= -180) {
degrees += 360;
}
return degrees;
}
float normaliseAngleRad (float rads) {
while (rads > M_PI) {
rads -= 2 * M_PI;
}
while (rads <= -M_PI) {
rads += 2 * M_PI;
}
return rads;
}
// convert float to string, squashing very small floats to zero
QString floatToString(float f) {
if (f >= -0.000001 && f <= 0.000001) return "0";
else return QString::number(f);
}
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