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gts-devel-0.7.6-15.fc15.i686.rpm

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><H1
><A
NAME="GTS-OUT-OF-CORE-SIMPLIFICATION"
></A
>Out-of-core simplification</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN13242"
></A
><H2
>Name</H2
>Out-of-core simplification&nbsp;--&nbsp;objects for simplification based on vertex clustering.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN13245"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>&#13;#include &lt;gts.h&gt;


#define     <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-CLASS:CAPS"
>GTS_CLUSTER_CLASS</A
>               (klass)
#define     <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER:CAPS"
>GTS_CLUSTER</A
>                     (obj)
#define     <A
HREF="gts-out-of-core-simplification.html#GTS-IS-CLUSTER:CAPS"
>GTS_IS_CLUSTER</A
>                  (obj)
            <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
>;
            <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
>;
            <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERID"
>GtsClusterId</A
>;

<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
>* <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-CLASS"
>gts_cluster_class</A
>          (void);
<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
>* <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-NEW"
>gts_cluster_new</A
>                 (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
> *klass,
                                             <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERID"
>GtsClusterId</A
> id,
                                             <A
HREF="gts-vertices.html#GTSVERTEXCLASS"
>GtsVertexClass</A
> *vklass);
<GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-ADD"
>gts_cluster_add</A
>                 (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
> *c,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p,
                                             <GTKDOCLINK
HREF="GPOINTER"
>gpointer</GTKDOCLINK
> data);
<GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-UPDATE"
>gts_cluster_update</A
>              (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
> *c);

#define     <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-CLASS:CAPS"
>GTS_CLUSTER_GRID_CLASS</A
>          (klass)
#define     <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID:CAPS"
>GTS_CLUSTER_GRID</A
>                (obj)
#define     <A
HREF="gts-out-of-core-simplification.html#GTS-IS-CLUSTER-GRID:CAPS"
>GTS_IS_CLUSTER_GRID</A
>             (obj)
            <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
>GtsClusterGridClass</A
>;
            <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
>;

<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
>GtsClusterGridClass</A
>* <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-CLASS"
>gts_cluster_grid_class</A
> (void);
<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
>* <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-NEW"
>gts_cluster_grid_new</A
>        (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
>GtsClusterGridClass</A
> *klass,
                                             <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
> *cluster_class,
                                             <A
HREF="gts-surfaces.html#GTSSURFACE"
>GtsSurface</A
> *s,
                                             <A
HREF="gts-bounding-boxes-trees.html#GTSBBOX"
>GtsBBox</A
> *bbox,
                                             <GTKDOCLINK
HREF="GDOUBLE"
>gdouble</GTKDOCLINK
> delta);
<GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-ADD-TRIANGLE"
>gts_cluster_grid_add_triangle</A
>   (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
> *cluster_grid,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p1,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p2,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p3,
                                             <GTKDOCLINK
HREF="GPOINTER"
>gpointer</GTKDOCLINK
> data);
<A
HREF="gts-simple-statistics.html#GTSRANGE"
>GtsRange</A
>    <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-UPDATE"
>gts_cluster_grid_update</A
>         (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
> *cluster_grid);</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN13293"
></A
><H2
>Description</H2
><P
>Using vertex clusters and vertex cluster grids it is easy to design out-of-core algorithms for surface simplification. This approach has been detailed in a recent paper by Lindstrom and Turk ("Out-of-core simplification of large polygonal models", 2000).</P
><P
>Vertex clusters are just groups of vertices collapsed into a single vertex. The position of this single representative vertex can be derived with different techniques. The default GTS implementation <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
> just takes the average of the positions of the vertices in a given cluster as the representative position. Clusters are created using <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-NEW"
><CODE
CLASS="FUNCTION"
>gts_cluster_new()</CODE
></A
>. The cluster is initially empty and the position of the representative vertex is set to the origin. Vertices are added using <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-ADD"
><CODE
CLASS="FUNCTION"
>gts_cluster_add()</CODE
></A
> which calls the <GTKDOCLINK
HREF="ADD"
><CODE
CLASS="FUNCTION"
>add()</CODE
></GTKDOCLINK
> virtual method of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>. Once all the vertices have been added <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-UPDATE"
><CODE
CLASS="FUNCTION"
>gts_cluster_update()</CODE
></A
> computes the position of the representative vertex.</P
><P
>Clusters are grouped using the <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
><SPAN
CLASS="TYPE"
>GtsClusterGrid</SPAN
></A
> object which is just an implementation of the hash-table based regular grid of Lindstrom and Turk. This regular grid is created using <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-NEW"
><CODE
CLASS="FUNCTION"
>gts_cluster_grid_new()</CODE
></A
>. Once created triangles of the surface to be simplified can be added using <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-ADD-TRIANGLE"
><CODE
CLASS="FUNCTION"
>gts_cluster_grid_add_triangle()</CODE
></A
> which adds the vertices of the triangle to the <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
> they belong to and adds the corresponding faces to the simplified surface. After all the triangles of the original surface have been added the position of the representative vertex of all the vertex clusters is computed using <A
HREF="gts-out-of-core-simplification.html#GTS-CLUSTER-GRID-UPDATE"
><CODE
CLASS="FUNCTION"
>gts_cluster_grid_update()</CODE
></A
>. The simplified surface is then complete and the cluster grid can be destroyed using <A
HREF="gts-object-class.html#GTS-OBJECT-DESTROY"
><CODE
CLASS="FUNCTION"
>gts_object_destroy()</CODE
></A
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN13322"
></A
><H2
>Details</H2
><DIV
CLASS="REFSECT2"
><A
NAME="AEN13324"
></A
><H3
><A
NAME="GTS-CLUSTER-CLASS:CAPS"
></A
>GTS_CLUSTER_CLASS()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_CLUSTER_CLASS(klass)</PRE
><P
>Casts <CODE
CLASS="PARAMETER"
>klass</CODE
> to <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13335"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>klass</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a descendant of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13342"
></A
><H3
><A
NAME="GTS-CLUSTER:CAPS"
></A
>GTS_CLUSTER()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_CLUSTER(obj)</PRE
><P
>Casts <CODE
CLASS="PARAMETER"
>obj</CODE
> to <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13353"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>obj</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a descendant of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13360"
></A
><H3
><A
NAME="GTS-IS-CLUSTER:CAPS"
></A
>GTS_IS_CLUSTER()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_IS_CLUSTER(obj)</PRE
><P
>Evaluates to <TT
CLASS="LITERAL"
>TRUE</TT
> if <CODE
CLASS="PARAMETER"
>obj</CODE
> is a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>, <TT
CLASS="LITERAL"
>FALSE</TT
> otherwise.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13373"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>obj</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a pointer to test.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13378"
></A
><H3
><A
NAME="GTSCLUSTERCLASS"
></A
>GtsClusterClass</H3
><PRE
CLASS="PROGRAMLISTING"
>typedef struct {
  GtsObjectClass parent_class;

  void (* add) (GtsCluster * c, GtsPoint * p, gpointer data);
  void (* update) (GtsCluster * c);
} GtsClusterClass;</PRE
><P
>The cluster class derived from <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>. Virtual function <CODE
CLASS="PARAMETER"
>add</CODE
> adds point <CODE
CLASS="PARAMETER"
>p</CODE
> to the cluster while passing user-data <CODE
CLASS="PARAMETER"
>data</CODE
>. Virtual function <CODE
CLASS="PARAMETER"
>update</CODE
> computes the position of the representative vertex.</P
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13391"
></A
><H3
><A
NAME="GTSCLUSTER"
></A
>GtsCluster</H3
><PRE
CLASS="PROGRAMLISTING"
>typedef struct {
  GtsObject parent;

  GtsClusterId id;
  GtsVertex * v;
  guint n;
} GtsCluster;</PRE
><P
>The cluster object.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13399"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-object-class.html#GTSOBJECT"
>GtsObject</A
>&nbsp;<CODE
CLASS="STRUCTFIELD"
>parent</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>The parent object.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13405"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERID"
>GtsClusterId</A
>&nbsp;<CODE
CLASS="STRUCTFIELD"
>id</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Unique identifier.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13411"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-vertices.html#GTSVERTEX"
>GtsVertex</A
>&nbsp;*<CODE
CLASS="STRUCTFIELD"
>v</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
><A
HREF="gts-vertices.html#GTSVERTEX"
><SPAN
CLASS="TYPE"
>GtsVertex</SPAN
></A
> representative of all the vertices in the cluster.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13419"><SPAN
STYLE="white-space: nowrap"
><GTKDOCLINK
HREF="GUINT"
>guint</GTKDOCLINK
>&nbsp;<CODE
CLASS="STRUCTFIELD"
>n</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Number of vertices added to the cluster.&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13425"
></A
><H3
><A
NAME="GTSCLUSTERID"
></A
>GtsClusterId</H3
><PRE
CLASS="PROGRAMLISTING"
>typedef struct {
  guint x, y, z;
} GtsClusterId;</PRE
><P
></P
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13432"
></A
><H3
><A
NAME="GTS-CLUSTER-CLASS"
></A
>gts_cluster_class ()</H3
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
>* gts_cluster_class          (void);</PRE
><P
></P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13442"><SPAN
STYLE="white-space: nowrap"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Returns</I
></SPAN
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13449"
></A
><H3
><A
NAME="GTS-CLUSTER-NEW"
></A
>gts_cluster_new ()</H3
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
>* gts_cluster_new                 (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
> *klass,
                                             <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERID"
>GtsClusterId</A
> id,
                                             <A
HREF="gts-vertices.html#GTSVERTEXCLASS"
>GtsVertexClass</A
> *vklass);</PRE
><P
></P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13462"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>klass</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13469"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>id</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the id of the new cluster.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13474"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>vklass</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-vertices.html#GTSVERTEXCLASS"
><SPAN
CLASS="TYPE"
>GtsVertexClass</SPAN
></A
> for the representative vertex of the cluster.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13481"><SPAN
STYLE="white-space: nowrap"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Returns</I
></SPAN
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a new <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13488"
></A
><H3
><A
NAME="GTS-CLUSTER-ADD"
></A
>gts_cluster_add ()</H3
><PRE
CLASS="PROGRAMLISTING"
><GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        gts_cluster_add                 (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
> *c,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p,
                                             <GTKDOCLINK
HREF="GPOINTER"
>gpointer</GTKDOCLINK
> data);</PRE
><P
>Adds point <CODE
CLASS="PARAMETER"
>p</CODE
> to cluster <CODE
CLASS="PARAMETER"
>c</CODE
>.</P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13503"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>c</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13510"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>p</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-points.html#GTSPOINT"
><SPAN
CLASS="TYPE"
>GtsPoint</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13517"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>data</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> data to pass to the <GTKDOCLINK
HREF="ADD"
><CODE
CLASS="FUNCTION"
>add()</CODE
></GTKDOCLINK
> virtual method of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterClass</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13526"
></A
><H3
><A
NAME="GTS-CLUSTER-UPDATE"
></A
>gts_cluster_update ()</H3
><PRE
CLASS="PROGRAMLISTING"
><GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        gts_cluster_update              (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
>GtsCluster</A
> *c);</PRE
><P
>Updates the position of the vertex representative of all the
vertices added to <CODE
CLASS="PARAMETER"
>c</CODE
>.</P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13538"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>c</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13545"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID-CLASS:CAPS"
></A
>GTS_CLUSTER_GRID_CLASS()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_CLUSTER_GRID_CLASS(klass)</PRE
><P
>Casts <CODE
CLASS="PARAMETER"
>klass</CODE
> to <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterGridClass</SPAN
></A
>.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13556"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>klass</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a descendant of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterGridClass</SPAN
></A
>.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13563"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID:CAPS"
></A
>GTS_CLUSTER_GRID()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_CLUSTER_GRID(obj)</PRE
><P
>Casts <CODE
CLASS="PARAMETER"
>obj</CODE
> to <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13574"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>obj</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a descendant of <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13581"
></A
><H3
><A
NAME="GTS-IS-CLUSTER-GRID:CAPS"
></A
>GTS_IS_CLUSTER_GRID()</H3
><PRE
CLASS="PROGRAMLISTING"
>#define     GTS_IS_CLUSTER_GRID(obj)</PRE
><P
>Evaluates to <TT
CLASS="LITERAL"
>TRUE</TT
> if <CODE
CLASS="PARAMETER"
>obj</CODE
> is a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTER"
><SPAN
CLASS="TYPE"
>GtsCluster</SPAN
></A
>, <TT
CLASS="LITERAL"
>FALSE</TT
> otherwise.</P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13594"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>obj</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>a pointer to test.
&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13599"
></A
><H3
><A
NAME="GTSCLUSTERGRIDCLASS"
></A
>GtsClusterGridClass</H3
><PRE
CLASS="PROGRAMLISTING"
>typedef struct {
  GtsObjectClass parent_class;
} GtsClusterGridClass;</PRE
><P
>The cluster grid class derived from <A
HREF="gts-object-class.html#GTSOBJECTCLASS"
><SPAN
CLASS="TYPE"
>GtsObjectClass</SPAN
></A
>.</P
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13608"
></A
><H3
><A
NAME="GTSCLUSTERGRID"
></A
>GtsClusterGrid</H3
><PRE
CLASS="PROGRAMLISTING"
>typedef struct {
  GtsObject parent;

  GtsSurface * surface;
  GtsBBox * bbox;
  GtsVector size;

  GtsClusterClass * cluster_class;
  GHashTable * clusters;
} GtsClusterGrid;</PRE
><P
>The cluster grid object. </P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13616"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-object-class.html#GTSOBJECT"
>GtsObject</A
>&nbsp;<CODE
CLASS="STRUCTFIELD"
>parent</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>The parent object.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13622"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-surfaces.html#GTSSURFACE"
>GtsSurface</A
>&nbsp;*<CODE
CLASS="STRUCTFIELD"
>surface</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Surface being simplified.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13628"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-bounding-boxes-trees.html#GTSBBOX"
>GtsBBox</A
>&nbsp;*<CODE
CLASS="STRUCTFIELD"
>bbox</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Bounding box of the original surface.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13634"><SPAN
STYLE="white-space: nowrap"
><GTKDOCLINK
HREF="GTSVECTOR"
>GtsVector</GTKDOCLINK
>&nbsp;<CODE
CLASS="STRUCTFIELD"
>size</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Size of the simplification grid.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13640"><SPAN
STYLE="white-space: nowrap"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
>&nbsp;*<CODE
CLASS="STRUCTFIELD"
>cluster_class</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Private.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13646"><SPAN
STYLE="white-space: nowrap"
><GTKDOCLINK
HREF="GHASHTABLE"
>GHashTable</GTKDOCLINK
>&nbsp;*<CODE
CLASS="STRUCTFIELD"
>clusters</CODE
>;</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
>Private.&#13;</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13652"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID-CLASS"
></A
>gts_cluster_grid_class ()</H3
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
>GtsClusterGridClass</A
>* gts_cluster_grid_class (void);</PRE
><P
></P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13662"><SPAN
STYLE="white-space: nowrap"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Returns</I
></SPAN
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterGridClass</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13669"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID-NEW"
></A
>gts_cluster_grid_new ()</H3
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
>* gts_cluster_grid_new        (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
>GtsClusterGridClass</A
> *klass,
                                             <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERCLASS"
>GtsClusterClass</A
> *cluster_class,
                                             <A
HREF="gts-surfaces.html#GTSSURFACE"
>GtsSurface</A
> *s,
                                             <A
HREF="gts-bounding-boxes-trees.html#GTSBBOX"
>GtsBBox</A
> *bbox,
                                             <GTKDOCLINK
HREF="GDOUBLE"
>gdouble</GTKDOCLINK
> delta);</PRE
><P
></P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13684"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>klass</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRIDCLASS"
><SPAN
CLASS="TYPE"
>GtsClusterGridClass</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13691"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>cluster_class</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the klass to be used for the vertex clusters.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13696"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>s</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the simplified surface.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13701"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>bbox</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> bounding box of the surface to be simplified.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13706"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>delta</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> the size of one grid cell of the simplification grid.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13711"><SPAN
STYLE="white-space: nowrap"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Returns</I
></SPAN
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a new <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
><SPAN
CLASS="TYPE"
>GtsClusterGrid</SPAN
></A
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13718"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID-ADD-TRIANGLE"
></A
>gts_cluster_grid_add_triangle ()</H3
><PRE
CLASS="PROGRAMLISTING"
><GTKDOCLINK
HREF="VOID"
>void</GTKDOCLINK
>        gts_cluster_grid_add_triangle   (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
> *cluster_grid,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p1,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p2,
                                             <A
HREF="gts-points.html#GTSPOINT"
>GtsPoint</A
> *p3,
                                             <GTKDOCLINK
HREF="GPOINTER"
>gpointer</GTKDOCLINK
> data);</PRE
><P
>Adds the triangle defined by <CODE
CLASS="PARAMETER"
>p1</CODE
>, <CODE
CLASS="PARAMETER"
>p2</CODE
> and <CODE
CLASS="PARAMETER"
>p3</CODE
> to the respective clusters
of <CODE
CLASS="PARAMETER"
>cluster_grid</CODE
>.</P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13737"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>cluster_grid</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
><SPAN
CLASS="TYPE"
>GtsClusterGrid</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13744"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>p1</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-points.html#GTSPOINT"
><SPAN
CLASS="TYPE"
>GtsPoint</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13751"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>p2</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-points.html#GTSPOINT"
><SPAN
CLASS="TYPE"
>GtsPoint</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13758"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>p3</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-points.html#GTSPOINT"
><SPAN
CLASS="TYPE"
>GtsPoint</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13765"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>data</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> user data to pass to the cluster <GTKDOCLINK
HREF="ADD"
><CODE
CLASS="FUNCTION"
>add()</CODE
></GTKDOCLINK
> method.</P
></TD
></TR
></TBODY
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN13772"
></A
><H3
><A
NAME="GTS-CLUSTER-GRID-UPDATE"
></A
>gts_cluster_grid_update ()</H3
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gts-simple-statistics.html#GTSRANGE"
>GtsRange</A
>    gts_cluster_grid_update         (<A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
>GtsClusterGrid</A
> *cluster_grid);</PRE
><P
>Updates the representative vertices of all the clusters of <CODE
CLASS="PARAMETER"
>cluster_grid</CODE
>.</P
><P
></P
><P
></P
><TABLE
CLASS="variablelist"
BORDER="0"
CELLSPACING="0"
CELLPADDING="4"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13784"><SPAN
STYLE="white-space: nowrap"
><CODE
CLASS="PARAMETER"
>cluster_grid</CODE
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-out-of-core-simplification.html#GTSCLUSTERGRID"
><SPAN
CLASS="TYPE"
>GtsClusterGrid</SPAN
></A
>.</P
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
NAME="AEN13791"><SPAN
STYLE="white-space: nowrap"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Returns</I
></SPAN
>&nbsp;:</SPAN
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><P
> a <A
HREF="gts-simple-statistics.html#GTSRANGE"
><SPAN
CLASS="TYPE"
>GtsRange</SPAN
></A
> describing the statistics for the number of vertices
added to each cluster of <CODE
CLASS="PARAMETER"
>cluster_grid</CODE
>.</P
></TD
></TR
></TBODY
></TABLE
></DIV
></DIV
><TABLE
CLASS="navigation"
WIDTH="100%"
SUMMARY="Navigation footer"
CELLPADDING="2"
CELLSPACING="2"
><TR
VALIGN="middle"
><TD
ALIGN="left"
><A
ACCESSKEY="p"
HREF="gts-surface-simplification-and-refinement.html"
><B
>&lt;&lt;&lt;&nbsp;Surface simplification and refinement</B
></A
></TD
><TD
ALIGN="right"
><A
ACCESSKEY="n"
HREF="gts-isosurfaces-from-3d-functions.html"
><B
>Isosurfaces from 3D functions&nbsp;&gt;&gt;&gt;</B
></A
></TD
></TR
></TABLE
></BODY
></HTML
>

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