cloudcompare/doc/fr_2.4/methods/samplePoints.lyx

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\begin_body

\begin_layout Subsection
Mesh > Sample Points
\end_layout

\begin_layout Standard
\begin_inset CommandInset label
LatexCommand label
name "subsection:samplePoints"

\end_inset

 
\begin_inset Index idx
status collapsed

\begin_layout Plain Layout
echantillonner@échantillonner!des points sur un maillage
\end_layout

\end_inset


\end_layout

\begin_layout Standard
Cette fonction échantillonne de manière aléatoire des points sur une surface
 décrite par un maillage triangulaire (voir figure
\begin_inset space ~
\end_inset


\begin_inset CommandInset ref
LatexCommand ref
reference "fig:pointsSampling"

\end_inset

).
\begin_inset Newline newline
\end_inset


\end_layout

\begin_layout Standard
\begin_inset Float figure
placement !h
wide false
sideways false
status open

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\align center
\begin_inset Graphics
	filename ../images/Partie3_Fonctions/pointsSampling.jpg
	width 90text%

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\begin_inset Caption

\begin_layout Plain Layout
\begin_inset CommandInset label
LatexCommand label
name "fig:pointsSampling"

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Illustration du principe de l'échantillonnage de points sur un maillage
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Standard
Cette fonction génère un nouveau nuage de points.
 L'utilisateur à le choix via l'interface
\begin_inset space ~
\end_inset


\begin_inset CommandInset ref
LatexCommand ref
reference "fig:samplePointsOnMeshDlg"

\end_inset

 de spécifier : 
\end_layout

\begin_layout Itemize
soit le nombre total de points désiré (approximatif).
 
\end_layout

\begin_layout Itemize
soit la densité par unité de surface.
 Attention, la surface est exprimée dans l'unité implicite (au carré) des
 sommets du maillage.
 Pour connaitre la surface totale du maillage 
\begin_inset Index idx
status collapsed

\begin_layout Plain Layout
surface, mesurer
\end_layout

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, vous pouvez appeler préalablement la fonction 
\begin_inset Quotes ard
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 Mesh > Measure surface 
\begin_inset Quotes ald
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 (section
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LatexCommand ref
reference "subsection:measureSurface"

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).
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placement !h
wide false
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\align center
\begin_inset Graphics
	filename ../images/Partie3_Fonctions/samplePointsOnMeshDlg.png
	width 30text%

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\begin_inset Caption

\begin_layout Plain Layout
\begin_inset CommandInset label
LatexCommand label
name "fig:samplePointsOnMeshDlg"

\end_inset

Interface pour l'échantillonnage de points sur un maillage
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

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