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Back to Graphics and GPU Programming

OpenGL, in game GUI

Started by
11 comments, last by iwoplaza 11 years, 11 months ago

OpenGL, in game GUI


[color=#000000][font=arial, sans-serif]

[background=rgb(245, 245, 245)]I've tried[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]to create a[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]GUI[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]in the[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]background of[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]the game,[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]where will be showed[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]the amount of money[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)], the amount[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]of life[/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)] [/background][/font][font=arial, sans-serif]

[background=rgb(245, 245, 245)]etc. and I don't know how to make it sad.png. I want it to look like that:[/background][/font]


asdozx.png



Can you help me?


P.S. I'm sorry for my bad English.

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void __fastcall draw4x3()
{
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex2f(0,0);
glTexCoord2f(1,0);
glVertex2f(FCOpenGL->Width,0);
glTexCoord2f(1,1);
glVertex2f(FCOpenGL->Width,FCOpenGL->Height);
glTexCoord2f(0,1);
glVertex2f(0,FCOpenGL->Height);
glEnd();
}

if (draw_2d_menu == true) {
glPushAttrib(GL_DEPTH_TEST); // Save the current Depth test settings (Used for blending )
glDisable(GL_DEPTH_TEST); // Turn off depth testing (otherwise we get no FPS)

glMatrixMode(GL_PROJECTION); // Switch to the projection matrix
glPushMatrix(); // Save current projection matrix
glLoadIdentity();
// GetWindowRect(GetDesktopWindow(), drawRect); // Get current window size
glOrtho(0, FCOpenGL->Width, 0, FCOpenGL->Height, -1, 1); // Change the projection matrix using an orthgraphic projection
glMatrixMode(GL_MODELVIEW); // Return to the modelview matrix
glPushMatrix(); // Save the current modelview matrix
glLoadIdentity();
glColor3f(1.0, 1.0, 1.0); // Text color
glEnable(GL_TEXTURE_2D); // Restore the old base list
// glEnable(GL_BLEND);
//
// glBlendFunc(GL_ONE,GL_ONE);
glBindTexture(GL_TEXTURE_2D,MENUE);
draw4x3();
//glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_PROJECTION); //Switch to projection matrix
glPopMatrix(); // Restore the old projection matrix
glMatrixMode(GL_MODELVIEW); // Return to modelview matrix
glPopMatrix(); // Restore old modelview matrix
glPopAttrib(); // Restore depth testing

}



for displ;aying text is more trickier

you must build font list context


void BuildFont2(unsigned int & Ufont, int size)
{
HFONT font;
Ufont = glGenLists(256); // Generate enough display lists to hold
font = CreateFont(size, // height of font
0, // average character width
0, // angle of escapement
0, // base-line orientation angle
FW_BOLD, // font weight
0, // italic
0, // underline
0, // strikeout
DEFAULT_CHARSET, // character set
OUT_TT_PRECIS, // output precision
CLIP_DEFAULT_PRECIS, // clipping precision
ANTIALIASED_QUALITY, // output quality
FF_DONTCARE || DEFAULT_PITCH, // pitch and family
"Courier New"); // font
SelectObject((*dc), font); // Sets the new font as the current font in the device context
wglUseFontBitmaps((*dc), 0, 256, Ufont); // Creates a set display lists containing the bitmap fonts

}



how to initialize this
===================================================================
------------------ thease are global - global for opengl window class called here FCOpenGL
unsigned int titleb;
HDC dc;
----------------


HDC*ki=new HDC;
(*ki)=FCOpenGL->dc;
Initialize_OPENGL_ATTACH(ki,FCOpenGL->Width,FCOpenGL->Height);

====================================================================
void __fastcall Initialize_OPENGL_ATTACH(HDC *adc,int w, int h)
{
dc = adc; //this dc is not from FCOpenGL because its in different file this is: HDC * dc; so it's a pointer the procedure buildfont is in the same file as this proc
BuildFont2(titleb,38);
WINDOW_HEIGHT = h;
WINDOW_WIDTH = w;
}






and ad last writing text



void glWriteTEXT(int X,int Y, AnsiString text)
{
glPushAttrib(GL_DEPTH_TEST); // Save the current Depth test settings (Used for blending )
glDisable(GL_DEPTH_TEST); // Turn off depth testing (otherwise we get no FPS)

glMatrixMode(GL_PROJECTION); // Switch to the projection matrix
glPushMatrix(); // Save current projection matrix
glLoadIdentity();
// GetWindowRect(GetDesktopWindow(), drawRect); // Get current window size
glOrtho(0, WINDOW_WIDTH, 0, WINDOW_HEIGHT, -1, 1); // Change the projection matrix using an orthgraphic projection
glMatrixMode(GL_MODELVIEW); // Return to the modelview matrix
glPushMatrix(); // Save the current modelview matrix
glLoadIdentity();
// glColor3f(1.0, 1.0, 1.0); // Text color
glRasterPos2i(X, Y); // Position the Text
glPushAttrib(GL_LIST_BIT); // Save's the current base list
glListBase(base); // Set the base list to our character list
glCallLists(text.Length(), GL_UNSIGNED_BYTE, text.c_str()); // Display the text
glPopAttrib(); // Restore the old base list
glMatrixMode(GL_PROJECTION); //Switch to projection matrix
glPopMatrix(); // Restore the old projection matrix
glMatrixMode(GL_MODELVIEW); // Return to modelview matrix
glPopMatrix(); // Restore old modelview matrix

glPopAttrib(); // Restore depth testing

}



you can also download source from here
https://sites.google.com/site/imoomohomozumo/documents/OPENGL_ATTACH.cpp?attredirects=0&d=1
https://sites.google.com/site/imoomohomozumo/documents/OPENGL_ATTACH.h?attredirects=0&d=1
Master & Mentor
https://sites.google.com/site/customprog/
I have problem with that code unsure.png . Im working in Dev-C++ and I have errors.
This is my code of GUI:


////
////GUI Code
////
unsigned int titleb;
HDC dc;
HDC*ki=new HDC;
(ki)=FCOpenGL->dc;
Initialize_OPENGL_ATTACH(ki,FCOpenGL->Width,FCOpenGL->Height);
void __fastcall Initialize_OPENGL_ATTACH(HDC *adc,int w, int h)
{
BuildFont2(titleb,38);
WINDOW_HEIGHT = h;
WINDOW_WIDTH = w;
}
void __fastcall draw4x3()
{
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex2f(0,0);
glTexCoord2f(1,0);
glVertex2f(FCOpenGL->Width,0);
glTexCoord2f(1,1);
glVertex2f(FCOpenGL->Width,FCOpenGL->Height);
glTexCoord2f(0,1);
glVertex2f(0,FCOpenGL->Height);
glEnd();
}
if (draw_2d_menu == true) {
glPushAttrib(GL_DEPTH_TEST); // Save the current Depth test settings (Used for blending )
glDisable(GL_DEPTH_TEST); // Turn off depth testing (otherwise we get no FPS) glMatrixMode(GL_PROJECTION); // Switch to the projection matrix
glPushMatrix(); // Save current projection matrix
glLoadIdentity();
// GetWindowRect(GetDesktopWindow(), drawRect); // Get current window size
glOrtho(0, FCOpenGL->Width, 0, FCOpenGL->Height, -1, 1); // Change the projection matrix using an orthgraphic projection
glMatrixMode(GL_MODELVIEW); // Return to the modelview matrix
glPushMatrix(); // Save the current modelview matrix
glLoadIdentity();
glColor3f(1.0, 1.0, 1.0); // Text color
glEnable(GL_TEXTURE_2D); // Restore the old base list
// glEnable(GL_BLEND);
//
// glBlendFunc(GL_ONE,GL_ONE);
glBindTexture(GL_TEXTURE_2D,MENUE);
draw4x3();
//glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_PROJECTION); //Switch to projection matrix
glPopMatrix(); // Restore the old projection matrix
glMatrixMode(GL_MODELVIEW); // Return to modelview matrix
glPopMatrix(); // Restore old modelview matrix
glPopAttrib(); // Restore depth testing
}
void BuildFont2(unsigned int & Ufont, int size)
{
HFONT font;
Ufont = glGenLists(256); // Generate enough display lists to hold
font = CreateFont(size, // height of font
0, // average character width
0, // angle of escapement
0, // base-line orientation angle
FW_BOLD, // font weight
0, // italic
0, // underline
0, // strikeout
DEFAULT_CHARSET, // character set
OUT_TT_PRECIS, // output precision
CLIP_DEFAULT_PRECIS, // clipping precision
ANTIALIASED_QUALITY, // output quality
FF_DONTCARE || DEFAULT_PITCH, // pitch and family
"Courier New"); // font
SelectObject((*dc), font); // Sets the new font as the current font in the device context
wglUseFontBitmaps((*dc), 0, 256, Ufont); // Creates a set display lists containing the bitmap fonts}
////GUI Code


What I'm doing wrong.
It would help if you could tell us the errors you were getting.
Errors:
-cannot convert `HDC__' to `HDC__*' for argument `1' to `void* SelectObject(HDC__*, void*)'
-cannot convert `HDC__' to `HDC__*' for argument `1' to `BOOL wglUseFontBitmapsA(HDC__*, DWORD, DWORD, DWORD)'
-expected constructor, destructor, or type conversion before '=' token
-expected `,' or `;' before '=' token
-expected constructor, destructor, or type conversion before '(' token
-expected `,' or `;' before '(' token
-In function `void Initialize_OPENGL_ATTACH(HDC__**, int, int)':
-`BuildFont2' undeclared (first use this function)
-(Each undeclared identifier is reported only once for each function it appears in.)
-`WINDOW_HEIGHT' undeclared (first use this function)
-`WINDOW_WIDTH' undeclared (first use this function)
-In function `void draw4x3()':
-`FCOpenGL' undeclared (first use this function)
-At global scope:
-expected unqualified-id before "if"
-expected `,' or `;' before "if"
- In function `void BuildFont2(unsigned int&, int)':
-`void BuildFont2(unsigned int&, int)' used prior to declaration
- cannot convert `HDC__' to `HDC__*' for argument `1' to `void* SelectObject(HDC__*, void*)'
- cannot convert `HDC__' to `HDC__*' for argument `1' to `BOOL wglUseFontBitmapsA(HDC__*, DWORD, DWORD, DWORD)'
- [Build Error] [main.o] Error 1

void __fastcall Initialize_OPENGL_ATTACH(HDC *adc,int w, int h)
{
dc = adc; //this dc is not from FCOpenGL because its in different file this is: HDC * dc; so it's a pointer the procedure buildfont is in the same file as this proc
BuildFont2(titleb,38);
WINDOW_HEIGHT = h;
WINDOW_WIDTH = w;
}


In Line "dc = adc;" is error. Why its wrong?
first of all selectobject and wglbitamp whate ever is used in wingdi.h


second thing is that FCOpenGL->dc is the opengl device context



PIXELFORMATDESCRIPTOR pfd;
int pf;


dc = GetDC( FCOpenGL->Handle ); <--- SEEE ?
ZeroMemory( &pfd, sizeof( pfd));
pfd.nSize = sizeof( pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 32;
pfd.cDepthBits = 32; pfd.cStencilBits = 8;
pfd.iLayerType = PFD_MAIN_PLANE;

pf = ChoosePixelFormat(dc, &pfd);
SetPixelFormat(dc, pf, &pfd);
rc = wglCreateContext(dc);
wglMakeCurrent(dc,rc);



initialize openglattach sets its own dc (pointer) to point onto this FCOpenGL->dc (device context)


you use only one HDC dc;(the FCOpenGL device context - opengl window context)

and in opengl_attach.h there is almost similar var called HDC *dc; BUT THIS IS A POINTER


so the steps you must achieve:

CREATE OPENGL WINDOW (you create device and rendering contexts)
then you do opengl_attach_initialize();


HDC*ki=new HDC;
(*ki)=FCOpenGL->dc; the opengl device context
Initialize_OPENGL_ATTACH(ki,Width,Height); <-- set the pointer to point onto our opengl device context...



you misunderstood what you must put into those functions you cannot create a global variable HDC dc; (that is your opengkl device context)
sad.png




OK IN OTHER WORD I THINK YOU WANT TO PUT THIS ALL INTO ONE SINGLE FILE SO READ NOW:

create variables

HGLRC rc;// : ; // Rendering Context
HDC dc;// : ; // Device Context
etc.
HDC *dc_SSH;
unsigned int base; //our font list

CREATE OPENGL DEVICE AND RENDERING CONTEXT (opengl window)

the dc is HDC dc; (getwindowdc(COMPONENT->Handle);) every win32 control has its own handle (or not every but in most cases)

replace dc with dc_SSH in code below


void BuildFont(unsigned int & Ufont)
{
HFONT font;
Ufont = glGenLists(256); // Generate enough display lists to hold
font = CreateFont(22, // height of font
0, // average character width
0, // angle of escapement
0, // base-line orientation angle
FW_BOLD, // font weight
0, // italic
0, // underline
0, // strikeout
DEFAULT_CHARSET, // character set
OUT_TT_PRECIS, // output precision
CLIP_DEFAULT_PRECIS, // clipping precision
ANTIALIASED_QUALITY, // output quality
FF_DONTCARE || DEFAULT_PITCH, // pitch and family
"Courier New"); // font
SelectObject((*dc), font); // Sets the new font as the current font in the device context
wglUseFontBitmaps((*dc), 0, 256, Ufont); // Creates a set display lists containing the bitmap fonts

}


AFTER VREATING OPENGL WINDOW AND INITIALIZING OPENGL



HDC*ki=new HDC;

(*ki)=dc;

Initialize_OPENGL_ATTACH(ki,Width,Height);

where

void __fastcall Initialize_OPENGL_ATTACH(HDC *adc,int w, int h)
{
dc_SSH = adc;
BuildFont(base);


}


that should do the trick

or delete pointers and (*) surrounding opengl device context

it is only a typecast (*int) is equal to int
Master & Mentor
https://sites.google.com/site/customprog/
You send me link to source code that does not work too well. I had to a little change it. Although it's still not working. Can you send me the completed source code?
i gave you everything you need to get it working, tell my what problems you have now, you do something wrong
Master & Mentor
https://sites.google.com/site/customprog/
I'm from Poland but you should understand me.

This topic is closed to new replies.

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