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<h2 title="Interface RayCastCallback" class="title">Interface RayCastCallback
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<pre>public interface
<span class="strong">RayCastCallback
</span></pre>
<div class="block">Callback class for ray casts.
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<dl><dt><span class="strong">Author:
</span></dt>
<dd>mzechner
</dd>
<dt><span class="strong">See Also:
</span></dt><dd><a href="../../../../../com/badlogic/gdx/physics/box2d/World.html#rayCast(com.badlogic.gdx.physics.box2d.RayCastCallback, com.badlogic.gdx.math.Vector2, com.badlogic.gdx.math.Vector2)"><code>World.rayCast(RayCastCallback, Vector2, Vector2)
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<td class="colFirst"><code>float
</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/badlogic/gdx/physics/box2d/RayCastCallback.html#reportRayFixture(com.badlogic.gdx.physics.box2d.Fixture, com.badlogic.gdx.math.Vector2, com.badlogic.gdx.math.Vector2, float)">reportRayFixture
</a></strong>(
<a href="../../../../../com/badlogic/gdx/physics/box2d/Fixture.html" title="class in com.badlogic.gdx.physics.box2d">Fixture
</a> fixture,
<a href="../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2
</a> point,
<a href="../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2
</a> normal,
float
fraction)
</code>
<div class="block">Called for each fixture found in the query.
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<h4>reportRayFixture
</h4>
<pre>float
reportRayFixture(
<a href="../../../../../com/badlogic/gdx/physics/box2d/Fixture.html" title="class in com.badlogic.gdx.physics.box2d">Fixture
</a> fixture,
<a href="../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2
</a> point,
<a href="../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math">Vector2
</a> normal,
float
fraction)
</pre>
<div class="block">Called for each fixture found in the query. You control how the ray cast proceeds by returning a float: return -1: ignore
this fixture and continue return 0: terminate the ray cast return fraction: clip the ray to this point return 1: don't clip
the ray and continue.
The
<a href="../../../../../com/badlogic/gdx/math/Vector2.html" title="class in com.badlogic.gdx.math"><code>Vector2
</code></a> instances passed to the callback will be reused for future calls so make a copy of them!
</div>
<dl><dt><span class="strong">Parameters:
</span></dt><dd><code>fixture
</code> - the fixture hit by the ray
</dd><dd><code>point
</code> - the point of initial intersection
</dd><dd><code>normal
</code> - the normal vector at the point of intersection
</dd>
<dt><span class="strong">Returns:
</span></dt><dd>-1 to filter, 0 to terminate, fraction to clip the ray for closest hit, 1 to continue
</dd></dl>
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