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center numbers under colormap

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This commit is contained in:
Matthias Hochsteger 2022-10-06 15:29:13 +02:00
parent 27679c231a
commit 9443929806
4 changed files with 24 additions and 8 deletions
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25
libsrc/visualization/mvdraw.cpp
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@ -38,9 +38,11 @@ namespace netgen
*/
void (*opengl_text_function)(const char * text) = NULL;
void Set_OpenGLText_Callback ( void (*fun) (const char * text) )
int opengl_text_width = 0;
void Set_OpenGLText_Callback ( void (*fun) (const char * text), int width )
{
opengl_text_function = fun;
opengl_text_width = width;
}
void MyOpenGLText (const char * text)
@ -50,6 +52,11 @@ namespace netgen
// cout << "MyOpenGLText: " << text << endl;
}
int MyOpenGLTextWidth ()
{
return opengl_text_width;
}
// texture for color decoding
// GLubyte * VisualScene :: colortexture = NULL;
@ -602,20 +609,26 @@ namespace netgen
glPushAttrib (GL_LIST_BIT);
// glListBase (fontbase);
char buf[20];
constexpr size_t buf_size = 20;
char buf[buf_size];
GLint viewport[4];
glGetIntegerv (GL_VIEWPORT, viewport);
double char_width = 2.0*MyOpenGLTextWidth()/(viewport[3]);
for (int i = 0; i <= 4; i++)
{
double x = minx + i * (maxx-minx) / 4;
glRasterPos3d (x, 0.7,-5);
double val;
if (logscale)
val = minval * pow (maxval / minval, i / 4.0);
else
val = minval + i * (maxval-minval) / 4;
sprintf (buf, "%8.3e", val);
snprintf (buf, buf_size, "%8.3e", val);
auto n = strlen(buf);
// glCallLists (GLsizei(strlen (buf)), GL_UNSIGNED_BYTE, buf);
double x = minx + i * (maxx-minx) / 4;
x -= 0.5*char_width * n; // center text
glRasterPos3d (x, 0.7,-5);
MyOpenGLText (buf);
}

3
libsrc/visualization/mvdraw.hpp
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@ -84,7 +84,8 @@ namespace netgen
NGGUI_API extern void MyOpenGLText (const char * text);
NGGUI_API extern void Set_OpenGLText_Callback ( void (*fun) (const char * text) );
NGGUI_API extern int MyOpenGLTextWidth ();
NGGUI_API extern void Set_OpenGLText_Callback ( void (*fun) (const char * text), int width );
NGGUI_API extern VisualScene visual_scene_cross;
NGGUI_API extern VisualScene *visual_scene;

2
ng/fonts.hpp
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@ -2312,6 +2312,8 @@ namespace netgen {
return list_base;
}
int Width() { return w; };
int Height() { return h; };
};
// create Fonts statically and return pointer on selecting

2
ng/ngpkg.cpp
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@ -1992,7 +1992,7 @@ namespace netgen
SetVisualScene (Togl_Interp(togl));
visual_scene->DrawScene();
Set_OpenGLText_Callback (&MyOpenGLText_GUI);
Set_OpenGLText_Callback (&MyOpenGLText_GUI, font->Width());
return TCL_OK;
}