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V_Sim API - Reference Manual | ![]() |
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#define ISOSURFACES_PROPERTY_POTENTIAL struct SurfaceResource_struct; typedef SurfaceResource; struct SurfacesOrder_struct; typedef SurfacesOrder; struct Surfaces_struct; typedef Surfaces; Surfaces* isosurfacesNew (); void isosurfacesAllocate (Surfaces *surf, int nsurf, int npolys, int npoints); void isosurfacesReallocate (Surfaces **surf, int nsurf, int npolys, int npoints); void isosurfacesFree (Surfaces *surf); gboolean isosurfacesRemove (Surfaces *surf, int idSurf); gboolean isosurfacesLoad_file (const char *file, Surfaces **surf, GError **error); void isosurfacesDraw_surfaces (int openGLId, OpenGLView *view, Surfaces *surf[], SurfacesOrder *order); void isosurfacesCopy_resource (SurfaceResource *res, SurfaceResource *res_old); void isoSurfacesSet_fitToBox (VisuData *data, Surfaces *surf); void isosurfacesSet_showAll (Surfaces *surf, gboolean show); void isosurfacesSet_surfaceResource (Surfaces *surf, int surf_index, SurfaceResource *res); int isosurfacesGet_nbSurfaces (Surfaces *surf); int isosurfacesGet_surfaceId (Surfaces *surf, int i); int isosurfacesGet_surfacePosition (Surfaces *surf, int id); gboolean isosurfacesGet_surfaceRendered (Surfaces *surf, int surf_index); SurfaceResource* isosurfacesGet_surfaceResource (Surfaces *surf, int surf_index); const gchar* isosurfacesGet_surfaceName (Surfaces *surf, int surf_index); int* isosurfacesGet_surfaceSortedById (Surfaces *surf); SurfaceResource* isosurfacesGet_resourceFromName (const gchar *surf_name, gboolean *new); int isosurfacesGet_newId (Surfaces *surf); float* isosurfacesGet_floatProperty (Surfaces *surf, const gchar *name); float* isosurfacesAdd_floatProperty (Surfaces *surf, const gchar *name); gboolean isosurfacesGet_floatPropertyValue (Surfaces *surf, int idSurf, const gchar *name, float *value); SurfacesOrder* isosurfacesOrder_new (); void isosurfacesOrder_free (SurfacesOrder *order); void isosurfacesOrder_polygons (SurfacesOrder *order, Surfaces *surf[]); void isosurfacesInit (); void isosurfacesCheck_consistency (Surfaces *surf);
Originally written by Luc Billard for his Visualize program. This module allows loading of .surf files to draw scalar fields on top of the current display scene. .surf files are text files which specs are the following :
1st line is arbitrary
2nd line must contain 3 real (float) values: dxx dyx dyy
3rd line must contain 3 real (float) values: dzx dzy dzz
4th line must contain 3 positive integers which represents respectively the number of surfaces, the total number of polys, and the total number of points
Then, for each of these surfaces :
next line must contain the name of the surface : it is a string which should match the pattern surface_*
next line must contain 2 positive integer values: the number of polys (num_polys) and the number of points (num_points) used by the surface
each of the following num_polys lines must match the pattern [n i_1 i_2 i_3 ... i_n] where n is the number of vertices in the poly (n >= 3) and [i_1 i_2 i_3 ... i_n] are the numbering of these vertices (vertices numbered from 1 to num_points)
each of the following num_points lines must contain 6 real values for the successive (1 to num_points) points : [x y z nx ny nz], where x y z are the coordinates of the point and nx ny nz are the coordinates of the unit normal at the point
It is the responsibility of the user to guarantee that dxx, dyx, dyy, dzx, dzy, dzz match the one currently loaded in V_Sim's current context. Though if you use panelSurfaces you can ask to resize the surfaces so that they fit in the current loaded box.
#define ISOSURFACES_PROPERTY_POTENTIAL "potential_values"
Flag used in an ASCII surf file to give informations on the value the surface is built from.
struct SurfaceResource_struct { /* Name used to label the surface. */ gchar *surfnom; /* Material used to draw a specific surface. */ Color *color; float material[5]; /* Rendered or not */ gboolean rendered; };
This structure defines some drawing properties of a set of Surfaces.
gchar *surfnom ; |
the name of the surface (in UTF-8) ; |
Color *color ; |
a Color for the surface ; |
float material [5]; |
the lighting effects of the surface ; |
gboolean rendered ; |
boolean for the visibility of the surface. |
typedef struct SurfaceResource_struct SurfaceResource;
Short name to adress SurfaceResource_struct objects.
struct SurfacesOrder_struct;
An opaque structure to store the order of drawn polygons when surfaces are involved.
typedef struct SurfacesOrder_struct SurfacesOrder;
Short name to adress SurfacesOrder_struct objects.
struct Surfaces_struct { /* Number of different surfaces. */ int nsurf; /* Number of polygons */ int num_polys, num_points; /* Give the number of the surface when the number of the polygon is given. */ int *poly_surf_index; /* Return the number of vertices when the id of the polygon is given. */ int *poly_num_vertices; /* Return the id j of the vertice of polygon i. */ int **poly_vertices; /* Vectors giving points and normal of the vertice i. */ float **poly_points; float **poly_normals; /* The description of the box where surfaces are drawn. */ float local_box[6]; /* Resources for each surfaces. */ SurfaceResource **resources; /* Id for each surfaces. */ int *ids; /* Table to add properties to surfaces. */ GHashTable *properties; };
This structure stores surfaces. Several surfaces are stored in a single structure for improved performences.
int nsurf ; |
number of surfaces encoded in this structure ; |
int num_polys ; |
number of polygoins stored in this structure ; |
int num_points ; |
number of vertices stored in this structure ; |
int *poly_surf_index ; |
gives the id of the surface for each polygon ; |
int *poly_num_vertices ; |
gives the number of vertices used by each polygons ; |
int **poly_vertices ; |
returns the id j of the vertices of polygon i ; |
float **poly_points ; |
vectors giving points of the vertex i ; |
float **poly_normals ; |
vectors giving normals of the vertex i ; |
float local_box [6]; |
the description of the box where surfaces are drawn ; |
SurfaceResource **resources ; |
for each surface points on a SurfaceResource ; |
int *ids ; |
gives a list of ids used to index surfaces ; |
GHashTable *properties ; |
an hashtable of properties. |
Surfaces* isosurfacesNew ();
Create a new (with unallocated internal arrays) structure to store surfaces.
Returns : | a newly allocated Surfaces structure. |
void isosurfacesAllocate (Surfaces *surf, int nsurf, int npolys, int npoints);
Allocate internal arrays to store surfaces having the given description.
surf : |
a Surfaces structure ; |
nsurf : |
the number of surfaces to store ; |
npolys : |
the number of polygons (in total) ; |
npoints : |
the total number of vertices. |
void isosurfacesReallocate (Surfaces **surf, int nsurf, int npolys, int npoints);
Change the allocation of internal arrays to store surfaces with the updated description.
surf : |
a Surfaces structure ; |
nsurf : |
the number of surfaces to store ; |
npolys : |
the number of polygons (in total) ; |
npoints : |
the total number of vertices. |
void isosurfacesFree (Surfaces *surf);
Free all memory associated to the given surfaces.
surf : |
a Surfaces structure. |
gboolean isosurfacesRemove (Surfaces *surf, int idSurf);
Remove from memory all polygons from the given surface.
surf : |
a Surfaces object ; |
idSurf : |
the id of the surf to remove. |
Returns : | TRUE if the surface list is reduced to zero (and surf
to be freed).
|
gboolean isosurfacesLoad_file (const char *file, Surfaces **surf, GError **error);
This loads a surface file and set default material properties for it. See surf file specifications.
file : |
target file to load ; |
surf : |
a set of surfaces (location) ; |
error : |
a location to store errors. |
Returns : | TRUE in case of success, FALSE otherwise. Even in case of success
error may have been set.
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void isosurfacesDraw_surfaces (int openGLId, OpenGLView *view, Surfaces *surf[], SurfacesOrder *order);
Rebuild each visible surface's list. The order in which to draw the surfaces
is given in the order
argument.
openGLId : |
an id for the OpenGL list ; |
view : |
a OpenGLView object that describes the rendering box. |
surf : |
an array of Surfaces object, must be NULL terminated. |
order : |
a SurfacesOrder object. |
void isosurfacesCopy_resource (SurfaceResource *res, SurfaceResource *res_old);
This method copies all values from res_old
to res
.
res : |
an allocated SurfaceResource object to receive values ; |
res_old : |
a SurfaceResource to read the values from. |
void isoSurfacesSet_fitToBox (VisuData *data, Surfaces *surf);
This method changes the position of all vertices in the structure
to match the box description given in data
.
data : |
a VisuData object ; |
surf : |
a set of surfaces. |
void isosurfacesSet_showAll (Surfaces *surf, gboolean show);
Shows or hides all surfaces and check their "draw" status in the panel accordingly.
surf : |
a Surfaces object ; |
show : |
TRUE to show all surfaces, FALSE to hide them. |
void isosurfacesSet_surfaceResource (Surfaces *surf, int surf_index, SurfaceResource *res);
This method is used to change the resource of a surface.
surf : |
the surface object ; |
surf_index : |
the number of the surface ; |
res : |
the new resource. |
int isosurfacesGet_nbSurfaces (Surfaces *surf);
Retrieves th number of surfaces stired in a given surf
object.
surf : |
the surface object. |
Returns : | number of surfaces. |
int isosurfacesGet_surfaceId (Surfaces *surf, int i);
This returns for the given i
its id information.
surf : |
the surface object ; |
i : |
the number of the surface. |
Returns : | the id of the surface or 0, if i is invalid.
|
int isosurfacesGet_surfacePosition (Surfaces *surf, int id);
This returns for the given id
its number.
surf : |
the surface object ; |
id : |
the id of the surface. |
Returns : | the number of the surface or 0, if id is invalid.
|
gboolean isosurfacesGet_surfaceRendered (Surfaces *surf, int surf_index);
This returns for the given surf_index
its visibility.
surf : |
the surface object ; |
surf_index : |
the number of the surface. |
Returns : | the visibility of the surface or FALSE, if surf_index is invalid.
|
SurfaceResource* isosurfacesGet_surfaceResource (Surfaces *surf, int surf_index);
This returns for the given surf_index
its resource information.
surf : |
the surface object ; |
surf_index : |
the number of the surface. |
Returns : | the resource of the surface or NULL, if surf_index is invalid.
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const gchar* isosurfacesGet_surfaceName (Surfaces *surf, int surf_index);
This returns for the given surf_index
its name
(1 <= surf_index <= surfaces_number)
surf : |
the surface object ; |
surf_index : |
the number of the surface. |
Returns : | the name of the surface or empty name or NULL, if surf_index is invalid.
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int* isosurfacesGet_surfaceSortedById (Surfaces *surf);
This returns the surface numbers sorted using their ids.
surf : |
the surface object. |
Returns : | a newly allocated array with surface numbers. |
SurfaceResource* isosurfacesGet_resourceFromName (const gchar *surf_name, gboolean *new);
This returns the resource information matching the given surf_name
. If
the resource doesn't exist, it is created and new
is set to TRUE.
surf_name : |
the name of the surface ; |
new : |
a location to store a boolean value (can be NULL). |
Returns : | the resource of the surface or NULL, if surf_name is invalid.
|
int isosurfacesGet_newId (Surfaces *surf);
This returns a unique id to create a new surface.
surf : |
the surface object. |
Returns : | a value suitable to create a new surface in this set of surfaces. |
float* isosurfacesGet_floatProperty (Surfaces *surf, const gchar *name);
Some properties can be associated to the surfaces stored in surf
.
This method is used to retrieve floating point values properties.
surf : |
a Surfaces object ; |
name : |
the name of the property to look for. |
Returns : | a table with the values if the property is found, NULL otherwise. |
float* isosurfacesAdd_floatProperty (Surfaces *surf, const gchar *name);
Some properties can be associated to the surfaces stored in surf
.
This method is add a new property.
surf : |
a Surfaces object ; |
name : |
the name of the property to add. |
Returns : | a newly allocated array that can be populated. |
gboolean isosurfacesGet_floatPropertyValue (Surfaces *surf, int idSurf, const gchar *name, float *value);
This method retrieves a float value stored as a property called name
for
the surface defined by its number idSurf
.
surf : |
a Surfaces object ; |
idSurf : |
a surface number ; |
name : |
the name of the property to get the value from ; |
value : |
a location to store the value. |
Returns : | TRUE if a value is indeed found. |
SurfacesOrder* isosurfacesOrder_new ();
Create an object to hold the order in which the surfaces must be
drawn. See isosurfacesOrder_polygons()
to set this object.
Returns : | a newly created SurfacesOrder object without any values. |
void isosurfacesOrder_free (SurfacesOrder *order);
Free memory used by a SurfacesOrder object.
order : |
the object to be freed. |
void isosurfacesOrder_polygons (SurfacesOrder *order, Surfaces *surf[]);
Re-orders the polygons in back to front order. This function should be called everytime a redraw is needed.
order : |
the description of the polygons order ; |
surf : |
an array of Surfaces object, must be NULL terminated. |
void isosurfacesInit ();
Method used to initialised the surface handling, should not be called.