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2011-01-16 16:29:00 +00:00
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
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2015-10-07 21:00:29 +00:00
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<title>HC - A collision detection library</title>
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2011-01-18 14:35:55 +00:00
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2011-01-16 18:28:07 +00:00
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2011-01-16 15:53:14 +00:00
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</head>
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2011-01-16 16:29:00 +00:00
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<body><a name="top"></a>
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<div id="header">
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<h1>Hardon Collider <span class="small">Collision detection for <a href="http://www.love2d.org/">LÖVE</a></span></h1>
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2011-01-24 19:36:04 +00:00
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<ul id="main-nav">
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<li><a href="index.html">Home</a></li>
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<li><a href="tutorial.html">Tutorial</a></li>
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<li><a href="reference.html">Reference</a></li>
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</ul>
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<h2>Home</h2>
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</div>
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<a name="HC"></a>
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<div id="GC" class="outer-block">
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<h3>HC<a class="top" href="#top">^ top</a></h3>
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<div class="preamble">
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<p>HC is a Lua module to simplify one important aspect in
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computer games: Collision detection.</p>
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<p>It can detect collisions between arbitrary positioned and rotated shapes.
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Those shapes can either be circles or polygons. Any non-intersecting polygons
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are supported, even concave ones.</p>
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<p>The main interface is simple:
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<ul>
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<li>Define collision callbacks,</li>
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<li>Add shapes to the scene and</li>
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<li>Update HC every frame.</li>
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</ul>
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</p>
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</div>
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2011-02-17 15:03:00 +00:00
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<div class="text-block">
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<h4>Download</h4>
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<p>You can download the latest packaged version as <a href="http://github.com/vrld/HC/zipball/master">zip</a>-
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or <a href="http://github.com/vrld/HC/tarball/master">tar</a>-archive directly from
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<a href="http://github.com/">github</a>. In that archive there will be a directory called
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<code>vrld-HC-<numbers></code> - you probably want to rename that to something
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shorter (<code>HC</code> comes to mind).</p>
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<p>You can also have a look at the sourcecode online <a href="http://github.com/vrld/HC">here</a>.</p>
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<p>If you use the <a href="http://git-scm.com">Git</a> command line client, you can clone
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the repository by running:</p>
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<pre>git clone git://github.com/vrld/HC.git</pre>
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<p>Once done, you can check for updates by running:</p>
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<pre>git pull</pre>
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<p>from inside the directory.</p>
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</div>
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<div class="text-block">
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<h4>First steps</h4>
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<p>This is an example on how to use HC.
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One shape will stick to the mouse position, while the other will stay in the same place:</p>
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<pre><code class="lua">HC = require 'HC'
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-- array to hold collision messages
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local text = {}
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2011-06-04 15:03:23 +00:00
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-- this is called when two shapes collide
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function on_collision(dt, shape_a, shape_b, mtv_x, mtv_y)
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text[#text+1] = string.format("Colliding. mtv = (%s,%s)",
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mtv_x, mtv_y)
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end
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-- this is called when two shapes stop colliding
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function collision_stop(dt, shape_a, shape_b)
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text[#text+1] = "Stopped colliding"
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end
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function love.load()
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-- initialize library
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Collider = HC(100, on_collision, collision_stop)
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-- add a rectangle to the scene
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rect = Collider:addRectangle(200,400,400,20)
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-- add a circle to the scene
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mouse = Collider:addCircle(400,300,20)
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mouse:moveTo(love.mouse.getPosition())
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end
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function love.update(dt)
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-- move circle to mouse position
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mouse:moveTo(love.mouse.getPosition())
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-- rotate rectangle
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rect:rotate(dt)
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-- check for collisions
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Collider:update(dt)
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while #text > 40 do
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table.remove(text, 1)
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end
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end
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function love.draw()
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-- print messages
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for i = 1,#text do
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love.graphics.setColor(255,255,255, 255 - (i-1) * 6)
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love.graphics.print(text[#text - (i-1)], 10, i * 15)
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end
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-- shapes can be drawn to the screen
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love.graphics.setColor(255,255,255)
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rect:draw('fill')
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mouse:draw('fill')
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end</code></pre>
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</div>
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2011-02-17 15:03:00 +00:00
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<div class="text-block">
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<h4>License</h4>
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<blockquote id="license">
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<p>Copyright (c) 2010-2011 Matthias Richter</p>
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<p>Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:</p>
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<p>The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.</p>
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<p>Except as contained in this notice, the name(s) of the above copyright holders
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shall not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization.</p>
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<p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.</p>
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</blockquote>
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</div>
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</div>
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2011-01-16 18:28:07 +00:00
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</html>
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