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author | randomguy3 <randomguy3@7c02a99a-9b00-45e3-bf44-6f3dd7fddb64> | 2012-01-06 13:44:40 +0000 |
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committer | randomguy3 <randomguy3@7c02a99a-9b00-45e3-bf44-6f3dd7fddb64> | 2012-01-06 13:44:40 +0000 |
commit | 2ed61cfb3ad3d404b9a44bbb3f4c8083b469ae22 (patch) | |
tree | 9939c67d95720a330bd7b884363d801cc7d5811d /src/common/util.m |
Move everything into trunk.
Also add branches and tags directories.
git-svn-id: https://tikzit.svn.sourceforge.net/svnroot/tikzit/trunk@348 7c02a99a-9b00-45e3-bf44-6f3dd7fddb64
Diffstat (limited to 'src/common/util.m')
-rw-r--r-- | src/common/util.m | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/common/util.m b/src/common/util.m new file mode 100644 index 0000000..feef76c --- /dev/null +++ b/src/common/util.m @@ -0,0 +1,113 @@ +// +// util.m +// TikZiT +// +// Copyright 2010 Aleks Kissinger. All rights reserved. +// +// +// This file is part of TikZiT. +// +// TikZiT 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. +// +// TikZiT 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. +// + +#import "util.h" +#import "math.h" + +NSRect NSRectAroundPointsWithPadding(NSPoint p1, NSPoint p2, float padding) { + return NSMakeRect(MIN(p1.x,p2.x)-padding, + MIN(p1.y,p2.y)-padding, + ABS(p2.x-p1.x)+(2.0f*padding), + ABS(p2.y-p1.y)+(2.0f*padding)); +} + +NSRect NSRectAroundPoints(NSPoint p1, NSPoint p2) { + return NSRectAroundPointsWithPadding(p1, p2, 0.0f); +} + +NSRect NSRectAround4PointsWithPadding(NSPoint p1, NSPoint p2, NSPoint p3, NSPoint p4, float padding) { + float leftMost = MIN(p1.x, p2.x); + leftMost = MIN(leftMost, p3.x); + leftMost = MIN(leftMost, p4.x); + float rightMost = MAX(p1.x, p2.x); + rightMost = MAX(rightMost, p3.x); + rightMost = MAX(rightMost, p4.x); + float topMost = MIN(p1.y, p2.y); + topMost = MIN(topMost, p3.y); + topMost = MIN(topMost, p4.y); + float bottomMost = MAX(p1.y, p2.y); + bottomMost = MAX(bottomMost, p3.y); + bottomMost = MAX(bottomMost, p4.y); + return NSMakeRect(leftMost-padding, + topMost-padding, + (rightMost - leftMost)+(2.0f*padding), + (bottomMost - topMost)+(2.0f*padding)); +} + +NSRect NSRectAround4Points(NSPoint p1, NSPoint p2, NSPoint p3, NSPoint p4) { + return NSRectAround4PointsWithPadding(p1, p2, p3, p4, 0.0f); +} + +float NSDistanceBetweenPoints(NSPoint p1, NSPoint p2) { + float dx = p2.x - p1.x; + float dy = p2.y - p1.y; + return sqrt(dx * dx + dy * dy); +} + +float good_atan(float dx, float dy) { + if (dx > 0) { + return atan(dy/dx); + } else if (dx < 0) { + return M_PI + atan(dy/dx); + } else { + if (dy > 0) return 0.5 * M_PI; + else if (dy < 0) return 1.5 * M_PI; + else return 0; + } +} + +// interpolate on a cubic bezier curve +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; +} + +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; +} + +int normaliseAngleDeg (int degrees) { + while (degrees >= 360) { + degrees -= 360; + } + while (degrees <= -360) { + degrees += 360; + } + return degrees; +} + +static char ahex[] = +{'a','b','c','d','e','f','g','h','i','j', + 'A','B','C','D','E','F'}; + +NSString *alphaHex(unsigned short sh) { + if (sh > 255) return @"!!"; + return [NSString stringWithFormat:@"%c%c", ahex[sh/16], ahex[sh%16]]; +} + + |