RMFoundation.c
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//
// RMFoundation.c
//
// Copyright (c) 2008-2009, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#import "RMFoundation.h"
#import <math.h>
bool RMProjectedPointEqualToProjectedPoint(RMProjectedPoint point1, RMProjectedPoint point2)
{
return point1.x == point2.x && point2.y == point2.y;
}
bool RMProjectedRectIntersectsProjectedRect(RMProjectedRect rect1, RMProjectedRect rect2)
{
double minX1 = rect1.origin.x;
double maxX1 = rect1.origin.x + rect1.size.width;
double minY1 = rect1.origin.y;
double maxY1 = rect1.origin.y + rect1.size.height;
double minX2 = rect2.origin.x;
double maxX2 = rect2.origin.x + rect2.size.width;
double minY2 = rect2.origin.y;
double maxY2 = rect2.origin.y + rect2.size.height;
return ((minX1 <= minX2 && minX2 <= maxX1) || (minX2 <= minX1 && minX1 <= maxX2))
&& ((minY1 <= minY2 && minY2 <= maxY1) || (minY2 <= minY1 && minY1 <= maxY2));
}
bool RMProjectedRectContainsProjectedRect(RMProjectedRect rect1, RMProjectedRect rect2)
{
double minX1 = rect1.origin.x;
double maxX1 = rect1.origin.x + rect1.size.width;
double minY1 = rect1.origin.y;
double maxY1 = rect1.origin.y + rect1.size.height;
double minX2 = rect2.origin.x;
double maxX2 = rect2.origin.x + rect2.size.width;
double minY2 = rect2.origin.y;
double maxY2 = rect2.origin.y + rect2.size.height;
return ((minX2 >= minX1 && maxX2 <= maxX1) && (minY2 >= minY1 && maxY2 <= maxY1));
}
RMProjectedPoint RMScaleProjectedPointAboutPoint(RMProjectedPoint point, float factor, RMProjectedPoint pivot)
{
point.x = (point.x - pivot.x) * factor + pivot.x;
point.y = (point.y - pivot.y) * factor + pivot.y;
return point;
}
RMProjectedRect RMScaleProjectedRectAboutPoint(RMProjectedRect rect, float factor, RMProjectedPoint pivot)
{
rect.origin = RMScaleProjectedPointAboutPoint(rect.origin, factor, pivot);
rect.size.width *= factor;
rect.size.height *= factor;
return rect;
}
RMProjectedPoint RMTranslateProjectedPointBy(RMProjectedPoint point, RMProjectedSize delta)
{
point.x += delta.width;
point.y += delta.height;
return point;
}
RMProjectedRect RMTranslateProjectedRectBy(RMProjectedRect rect, RMProjectedSize delta)
{
rect.origin = RMTranslateProjectedPointBy(rect.origin, delta);
return rect;
}
RMProjectedPoint RMProjectedPointMake(double x, double y)
{
RMProjectedPoint point = { x, y };
return point;
}
RMProjectedRect RMProjectedRectMake(double x, double y, double width, double height)
{
RMProjectedRect rect = {
{x, y},
{width, height}
};
return rect;
}
RMProjectedSize RMProjectedSizeMake(double width, double heigth)
{
RMProjectedSize size = {
width, heigth
};
return size;
}
RMProjectedRect RMProjectedRectZero()
{
return RMProjectedRectMake(0.0, 0.0, 0.0, 0.0);
}
double RMEuclideanDistanceBetweenProjectedPoints(RMProjectedPoint point1, RMProjectedPoint point2)
{
double xd = point2.x - point1.x;
double yd = point2.y - point1.y;
return sqrt(xd*xd + yd*yd);
}