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generator</a> > <a onclick="link('noise_get.html')">9.3. Getting flat noise</a><br>
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onclick="link('noise_get_fbm.html')">9.4. Getting fbm noise</a>
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<h1>9.3. Getting flat noise</h1>
<a name="0"></a>
<p>This function returns the noise function value between -1.0 and 1.0 at given coordinates.<br /> </p>
<div class="code">
<p class="cpp"><span class="code-keyword">float</span> TCODNoise<span class="code-symbol">::</span>get<span
class="code-symbol">(</span><span class="code-keyword">float</span><span class="code-symbol"> *</span>f<span
class="code-symbol">,</span><span class="code-tcod"> TCOD_noise_type_t</span> type<span class="code-symbol">
=</span><span class="code-tcod"> TCOD_NOISE_DEFAULT</span><span class="code-symbol">)</span></p>
<p class="c"><span class="code-keyword">float</span> TCOD_noise_get<span class="code-symbol">(</span><span
class="code-tcod">TCOD_noise_t</span> noise<span class="code-symbol">,</span><span class="code-keyword">
float</span><span class="code-symbol"> *</span>f<span class="code-symbol">)</span><span
class="code-keyword"><br />float</span> TCOD_noise_get_ex<span class="code-symbol">(</span><span
class="code-tcod">TCOD_noise_t</span> noise<span class="code-symbol">,</span><span class="code-keyword">
float</span><span class="code-symbol"> *</span>f<span class="code-symbol">,</span><span class="code-tcod">
TCOD_noise_type_t</span> type<span class="code-symbol">)</span></p>
<p class="py">noise_get<span class="code-symbol">(</span>noise<span class="code-symbol">,</span> f<span
class="code-symbol">,</span> type<span class="code-symbol">=</span><span
class="code-tcod">NOISE_DEFAULT</span><span class="code-symbol">)</span></p>
</div>
<table class="param">
<tbody>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
<tr class="hilite">
<td>noise</td>
<td>In the C version, the generator handler, returned by the initialization function.<br /> </td>
</tr>
<tr>
<td>f</td>
<td>An array of coordinates, depending on the generator dimensions (between 1 and 4). The same array of
coordinates will always return the same value.<br /> </td>
</tr>
<tr class="hilite">
<td>type</td>
<td>The algorithm to use. If not defined, use the default one (set with setType or simplex if not set)
<br /> </td>
</tr>
</tbody>
</table>
<h6>Example:</h6>
<div class="code">
<p class="cpp"><span class="code-comment">// 1d noise<br /></span>TCODNoise<span class="code-symbol"> *</span>
noise1d<span class="code-symbol"> =</span><span class="code-keyword"> new</span> TCODNoise<span
class="code-symbol">(</span><span class="code-value">1</span><span class="code-symbol">)</span><span
class="code-symbol">;</span><span class="code-keyword"><br />float</span> p<span
class="code-symbol">=</span><span class="code-value">0.5</span>f<span class="code-symbol">;</span><span
class="code-comment"><br />// get a 1d simplex value<br /></span><span class="code-keyword">float</span>
value<span class="code-symbol"> =</span> noise1d<span class="code-symbol">-></span>get<span
class="code-symbol">(</span><span class="code-symbol">&</span>p<span class="code-symbol">)</span><span
class="code-symbol">;</span><span class="code-comment"><br />// 2d noise<br /></span>TCODNoise<span
class="code-symbol"> *</span> noise2d<span class="code-symbol"> =</span><span class="code-keyword">
new</span> TCODNoise<span class="code-symbol">(</span><span class="code-value">2</span><span
class="code-symbol">)</span><span class="code-symbol">;</span><span class="code-keyword"><br />float</span>
p<span class="code-symbol">[</span><span class="code-value">2</span><span class="code-symbol">]</span><span
class="code-symbol">=</span><span class="code-symbol">{</span><span class="code-value">0.5</span>f<span
class="code-symbol">,</span><span class="code-value">0.7</span>f<span class="code-symbol">}</span><span
class="code-symbol">;</span><span class="code-comment"><br />// get a 2D Perlin value<br /></span><span
class="code-keyword">float</span> value<span class="code-symbol"> =</span> noise2d<span
class="code-symbol">-></span>get<span class="code-symbol">(</span>p<span class="code-symbol">,</span><span
class="code-tcod"> TCOD_NOISE_PERLIN</span><span class="code-symbol">)</span><span
class="code-symbol">;</span></p>
<p class="c"><span class="code-comment">// 1d noise<br /></span><span class="code-tcod">TCOD_noise_t</span>
noise1d<span class="code-symbol"> =</span> TCOD_noise_new<span class="code-symbol">(</span><span
class="code-value">1</span><span class="code-symbol">,</span><span
class="code-tcod">TCOD_NOISE_DEFAULT_HURST</span><span class="code-symbol">,</span><span class="code-tcod">
TCOD_NOISE_DEFAULT_LACUNARITY</span><span class="code-symbol">,</span><span
class="code-tcod">NULL</span><span class="code-symbol">)</span><span class="code-symbol">;</span><span
class="code-keyword"><br />float</span> p<span class="code-symbol">=</span><span
class="code-value">0.5</span>f<span class="code-symbol">;</span><span class="code-comment"><br />// get a 1d
simplex value<br /></span><span class="code-keyword">float</span> value<span class="code-symbol"> =</span>
TCOD_noise_get<span class="code-symbol">(</span>noise1d<span class="code-symbol">,</span><span
class="code-symbol">&</span>p<span class="code-symbol">)</span><span class="code-symbol">;</span><span
class="code-comment"><br />// 2d noise<br /></span><span class="code-tcod">TCOD_noise_t</span> noise2d<span
class="code-symbol"> =</span> TCOD_noise_new<span class="code-symbol">(</span><span
class="code-value">2</span><span class="code-symbol">,</span><span
class="code-tcod">TCOD_NOISE_DEFAULT_HURST</span><span class="code-symbol">,</span><span class="code-tcod">
TCOD_NOISE_DEFAULT_LACUNARITY</span><span class="code-symbol">,</span><span
class="code-tcod">NULL</span><span class="code-symbol">)</span><span class="code-symbol">;</span><span
class="code-keyword"><br />float</span> p<span class="code-symbol">[</span><span
class="code-value">2</span><span class="code-symbol">]</span><span class="code-symbol">=</span><span
class="code-symbol">{</span><span class="code-value">0.5</span>f<span class="code-symbol">,</span><span
class="code-value">0.7</span>f<span class="code-symbol">}</span><span class="code-symbol">;</span><span
class="code-comment"><br />// get a 2d perlin value<br /></span><span class="code-keyword">float</span>
value<span class="code-symbol"> =</span> TCOD_noise_get_ex<span class="code-symbol">(</span>noise2d<span
class="code-symbol">,</span>p<span class="code-symbol">,</span><span
class="code-tcod">TCOD_NOISE_PERLIN</span><span class="code-symbol">)</span><span
class="code-symbol">;</span></p>
<p class="py"><span class="code-comment"># 1d noise<br /></span>noise1d<span class="code-symbol"> =</span>
libtcod<span class="code-symbol">.</span>noise_new<span class="code-symbol">(</span><span
class="code-value">1</span><span class="code-symbol">)</span><span class="code-comment"><br /># get a 1d
simplex value<br /></span>value<span class="code-symbol"> =</span> libtcod<span
class="code-symbol">.</span>noise_get<span class="code-symbol">(</span>noise1d<span
class="code-symbol">,</span><span class="code-symbol">[</span><span class="code-value">0.5</span><span
class="code-symbol">]</span><span class="code-symbol">)</span><span class="code-comment"><br /># 2d
noise<br /></span>noise2d<span class="code-symbol"> =</span> libtcod<span
class="code-symbol">.</span>noise_new<span class="code-symbol">(</span><span
class="code-value">2</span><span class="code-symbol">)</span><span class="code-comment"><br /># get a 2d
perlin value<br /></span>value<span class="code-symbol"> =</span> libtcod<span
class="code-symbol">.</span>noise_get<span class="code-symbol">(</span>noise2d<span
class="code-symbol">,</span><span class="code-symbol">[</span><span class="code-value">0.5</span><span
class="code-symbol">,</span><span class="code-value">0.7</span><span class="code-symbol">]</span><span
class="code-symbol">,</span> libtcod<span class="code-symbol">.</span><span
class="code-tcod">NOISE_PERLIN</span><span class="code-symbol">)</span></p>
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