Mercurial > projects > openmelee
view ai/utilities.d @ 32:741313c302ed default tip
updated demo
author | zzzzrrr <mason.green@gmail.com> |
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date | Mon, 06 Apr 2009 23:39:59 -0400 |
parents | 08ddf9e71b88 |
children |
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/* * Copyright (c) 2009, Mason Green (zzzzrrr) * http://www.dsource.org/projects/openmelee * * 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. * * Neither the name of the polygonal nor the names of its contributors may be * used to endorse or promote products derived from this software without specific * prior written permission. * * 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. */ module openmelee.ai.utilities; import tango.math.random.Kiss : Kiss; import blaze.common.bzMath : bzVec2, bzDot; float scalarRandomWalk(float initial, float walkspeed, float min, float max) { float next = initial + (((randomRange(0, 1) * 2) - 1) * walkspeed); if (next < min) return min; if (next > max) return max; return next; } // return component of vector perpendicular to a unit basis vector // IMPORTANT NOTE: assumes "basis" has unit magnitude(length==1) bzVec2 perpendicularComponent(bzVec2 vector, bzVec2 unitBasis) { return (vector - parallelComponent(vector, unitBasis)); } // return component of vector parallel to a unit basis vector // IMPORTANT NOTE: assumes "basis" has unit magnitude (length == 1) bzVec2 parallelComponent(bzVec2 vector, bzVec2 unitBasis) { float projection = bzDot(vector, unitBasis); return unitBasis * projection; } // ---------------------------------------------------------------------------- // classify a value relative to the interval between two bounds: // returns -1 when below the lower bound // returns 0 when between the bounds (inside the interval) // returns +1 when above the upper bound int intervalComparison(float x, float lowerBound, float upperBound) { if (x < lowerBound) return -1; if (x > upperBound) return +1; return 0; } float square(float x) { return x * x; } T randomRange(T = int) (T min, T max) { return min + Kiss.instance.natural() % (max + 1 - min); }