/*
* Protocoder
* A prototyping platform for Android devices
*
* Victor Diaz Barrales victormdb@gmail.com
*
* Copyright (C) 2014 Victor Diaz
* Copyright (C) 2013 Motorola Mobility LLC
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software
* is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
package org.protocoderrunner.views;
/*
* Taken from processing.org source code
*
*/
public class CanvasUtils {
static public final float lerp(float start, float stop, float amt) {
return start + (stop - start) * amt;
}
/**
* Normalize a value to exist between 0 and 1 (inclusive). Mathematically
* the opposite of lerp(), figures out what proportion a particular value is
* relative to start and stop coordinates.
*/
static public final float norm(float value, float start, float stop) {
return (value - start) / (stop - start);
}
/**
* Convenience function to map a variable from one coordinate space to
* another. Equivalent to unlerp() followed by lerp().
*/
static public final float map(float value, float istart, float istop, float ostart, float ostop) {
return ostart + (ostop - ostart) * ((value - istart) / (istop - istart));
}
}