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Update reference
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Matthias Richter
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reference.html
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reference.html
@ -20,7 +20,6 @@
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</head>
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<body><a name="top"></a>
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<a href="http://github.com/vrld/HardonCollider"><img style="position: absolute; top: 0; right: 0; border: 0;" src="http://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub" /></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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@ -206,7 +205,7 @@ end</code></pre>
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<a name="hardoncollider-setAutoUpdate"></a>
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<div id="setAutoUpdate" class="function">
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<div class="definition">function <span class="name">setAutoUpdate</span><span class="arglist">(max_step)</span><a class="top" href="#hardoncollider">^ top</a></div>
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<div class="definition">function <span class="name">setAutoUpdate</span><span class="arglist">(max_step, times)</span><a class="top" href="#hardoncollider">^ top</a></div>
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<p>Automatically call <code>hardoncollider.update(dt)</code> after each <code>love.update(dt)</code>.</p>
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<p>Basically overwrites <code>love.update(dt)</code> with the following function:</p>
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<pre><code class="lua">function love.update(dt)
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@ -215,15 +214,20 @@ end</code></pre>
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end</code></pre>
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<p>You can define a maximum time step. If <code>dt</code> is bigger than this step, the
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new <code>update</code> function will be called multiple times with a <code>dt</code>
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new <code>update</code> function will be called up to <code>times</code> times with a <code>dt</code>
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smaller or equal to the maximum time step:</p>
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<pre><code class="lua">while dt > max_step do
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<pre><code class="lua">local i = 1
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while dt > max_step do
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update(max_step)
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dt = dt - max_step
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i = i + 1
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if i > times then return end
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end
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update(dt)</code></pre>
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<p>If <code>max_step</code> is bigger than <code>1</code>, it is assumed to declare a
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minimum frame rate.</p>
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<p>If <code>times</code> is omitted, it is set to <code>1</code> and the code is equivalent to
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<code class="lua">update(math.min(dt, max_step))</code></p>
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<p>Once set, you can disable the auto update with
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<a href="#hardoncollider-setNoAutoUpdate"><code>setNoAutoUpdate()</code></a>, but beware that this
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@ -237,6 +241,10 @@ update(dt)</code></pre>
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<dt>number <code>max_step</code> (optional)</dt>
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<dd>Maximum time step (see above).</dd>
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</dl>
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<dl>
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<dt>number <code>times</code> (optional, default: 1)</dt>
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<dd>Number of times to call the update function.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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@ -247,7 +255,7 @@ update(dt)</code></pre>
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<pre><code class="lua">function love.load()
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HC.init(100, collision_start, collision_persist, collision_stop)
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game_init()
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HC.setAutoUpdate(30) -- maintain at least a update framerate of 30 FPS
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HC.setAutoUpdate(30)
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end</code></pre>
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</div>
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</div>
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@ -491,12 +499,20 @@ end</code></pre>
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<dd>A polygon shape.</dd>
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<dt><a href="#shapes-CircleShape">shapes.CircleShape</a></dt>
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<dd>A circle shape.</dd>
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<dt><a href="#shapes-shape:contains">shape:contains()</a></dt>
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<dd>Test if shape contains a point.</dd>
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<dt><a href="#shapes-shape:intersectsRay">shape:intersectsRay()</a></dt>
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<dd>Test if shape intersects a ray.</dd>
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<dt><a href="#shapes-shape:move">shape:move()</a></dt>
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<dd>Move the shape.</dd>
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<dt><a href="#shapes-shape:moveTo">shape:moveTo()</a></dt>
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<dd>Set the shape's position.</dd>
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<dt><a href="#shapes-shape:rotate">shape:rotate()</a></dt>
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<dd>Rotate the shape.</dd>
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<dt><a href="#shapes-shape:center">shape:center()</a></dt>
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<dd>Get the shape's center.</dd>
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<dt><a href="#shapes-shape:outcircle">shape:outcircle()</a></dt>
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<dd>Get circumscribing circle.</dd>
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<dt><a href="#shapes-shape:draw">shape:draw()</a></dt>
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<dd>Draw the shape.</dd>
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<dt><a href="#shapes-shape:collidesWith">shape:collidesWith()</a></dt>
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@ -552,6 +568,60 @@ end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:contains"></a>
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<div id="shape:contains" class="function">
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<div class="definition">function <span class="name">shape:contains</span><span class="arglist">(x, y)</span><a class="top" href="#shapes">^ top</a></div>
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<p>Test if the shape contains a given point.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Point to test.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>boolean</dt>
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<dd><code>true</code> if <code>x,y</code> lies in the interior of the shape.</dd>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">if unit.shape:contains(love.mouse.getPosition) then
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unit:setHovered(true)
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end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:intersectsRay"></a>
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<div id="shape:intersectsRay" class="function">
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<div class="definition">function <span class="name">shape:intersectsRay</span><span class="arglist">(x, y, dx, dy)</span><a class="top" href="#shapes">^ top</a></div>
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<p>Test if the shape intersects a ray.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Starting point of the ray.</dd>
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</dl>
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<dl>
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<dt>numbers <code>dx, dy</code></dt>
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<dd>Direction of the ray.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>boolean <code>intersection</code></dt>
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<dd><code>true</code> if the given ray intersects the shape.</dd>
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<dt>number <code>t</code> (only if intersecting)</dt>
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<dd>Ray parameter of the intersection.</dd>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">local intersecting, t = player:intersectsRay(x,y, dx,dy)
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if intersecting then -- laser pointer hits player
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local intersectionPoint = vector(x,y) + t * vector(dx,dy)
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player:addMark(intersectionPoint)
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end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:move"></a>
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<div id="shape:move" class="function">
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<div class="definition">function <span class="name">shape:move</span><span class="arglist">(x, y)</span><a class="top" href="#shapes">^ top</a></div>
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@ -572,6 +642,26 @@ end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:moveTo"></a>
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<div id="shape:move" class="function">
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<div class="definition">function <span class="name">shape:moveTo</span><span class="arglist">(x, y)</span><a class="top" href="#shapes">^ top</a></div>
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<p>Set the shape's position.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Point to place the shape.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>Nothing</dt>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">circle:moveTo(400,300) -- move circle to screen center</code></pre>
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</div>
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</div>
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<a name="shapes-shape:rotate"></a>
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<div id="shape:rotate" class="function">
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<div class="definition">function <span class="name">shape:rotate</span><span class="arglist">(angle, cx,cy)</span><a class="top" href="#shapes">^ top</a></div>
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@ -616,6 +706,31 @@ end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:outcircle"></a>
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<div id="shape:outcircle" class="function">
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<div class="definition">function <span class="name">shape:outcircle</span><span class="arglist">()</span><a class="top" href="#shapes">^ top</a></div>
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<p>Get circumscribing circle.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>None</dt>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Center of the circle.</dd>
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<dt>number <code>r</code></dt>
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<dd>Radius of the circle.</dd>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">if player:hasShield() then
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-- draw shield
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love.graphics.circle('line', player:outcircle())
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end</code></pre>
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</div>
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</div>
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<a name="shapes-shape:draw"></a>
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<div id="shape:draw" class="function">
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<div class="definition">function <span class="name">shape:draw</span><span class="arglist">(mode)</span><a class="top" href="#shapes">^ top</a></div>
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@ -696,6 +811,10 @@ end</code></pre>
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<dd>Split polygon into convex polygons.</dd>
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<dt><a href="#polygon-polygon:mergedWith">polygon:mergedWith()</a></dt>
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<dd>Merge polygon with other polygon.</dd>
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<dt><a href="#polygon-polygon:contains">polygon:contains()</a></dt>
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<dd>Test if polygon contains a point.</dd>
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<dt><a href="#polygon-polygon:intersectsRay">polygon:intersectsRay()</a></dt>
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<dd>Test if polygon intersects a ray.</dd>
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</dl>
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</div>
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@ -943,6 +1062,58 @@ end</code></pre>
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</div>
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</div>
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<a name="polygon-polygon:contains"></a>
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<div id="polygon:contains" class="function">
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<div class="definition">function <span class="name">polygon:contains</span><span class="arglist">(x, y)</span><a class="top" href="#shapes">^ top</a></div>
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<p>Test if the polygon contains a given point.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Point to test.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>boolean</dt>
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<dd><code>true</code> if <code>x,y</code> lies in the interior of the polygon.</dd>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">if button:contains(love.mouse.getPosition) then
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button:setHovered(true)
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end</code></pre>
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</div>
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</div>
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<a name="polygon-polygon:intersectsRay"></a>
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<div id="polygon:intersectsRay" class="function">
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<div class="definition">function <span class="name">polygon:intersectsRay</span><span class="arglist">(x, y, dx, dy)</span><a class="top" href="#shapes">^ top</a></div>
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<p>Test if the polygon intersects a ray.</p>
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<div class="arguments">Parameters:
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<dl>
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<dt>numbers <code>x, y</code></dt>
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<dd>Starting point of the ray.</dd>
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</dl>
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<dl>
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<dt>numbers <code>dx, dy</code></dt>
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<dd>Direction of the ray.</dd>
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</dl>
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</div>
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<div class="returns">Returns:
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<dl>
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<dt>boolean <code>intersection</code></dt>
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<dd><code>true</code> if the given ray intersects the shape.</dd>
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<dt>number <code>t</code> (only if intersecting)</dt>
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<dd>Ray parameter of the intersection.</dd>
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</dl>
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</div>
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<div class="example">Example:
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<pre><code class="lua">if poly:intersectsRay(400,300, dx,dy) then
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love.graphics.setLine(2) -- highlight polygon
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end</code></pre>
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</div>
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</div>
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</div>
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