Dissapearing vector

Dissapearing vector

InfiniteLoop

Member #8,434

March 2007

Hello All!

I am currently writing a game that uses a double buffering system. It is a tile game and as such, I have tiles of bitmaps with a vector (hline, vline) grid. This works fine and dandy, except when I open my options menu. The options menu is a seperate class that recieves the buffer that I was using for my double buffering system to use as a background. After I pass the buffer (that may or may not be the problem) I can no longer see any of my vector graphics. I have tested this by drawing a big rect and before the options menu it appears, during and after the otpions menu it doesn't. Is there some form of incompatability that I am just not aware of?

Thanks

Kris Asick

Member #1,424

July 2001

I recommend you post the code relating to this problem.

--- Kris Asick (Gemini)
--- http://www.pixelships.com

HoHo

Member #4,534

April 2004

Without code it is kind of difficult to understand what might be the problem.
Please post the code that deals is revelant to the menu switching.

__________
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InfiniteLoop

Member #8,434

March 2007

It works until this point:

menu = new CMenu(filename, challenge, buffer);
int ret = menu->loop();
if(ret == OK)
{
cleanUp();

setupGame(menu->getChallenge());
setupBitmap(menu->getFile());
}
delete menu;
menu = NULL;

This is the constructor of my CMenu class:

CMenu::CMenu(string name, int chal, BITMAP *back)
{
background = back;
challenge = chal;
file = name;
state = LOOP;

init();
}

From this point on, no vector graphics will appear.

Kris Asick

Member #1,424

July 2001

Probably something to do with CMenu::Init(), but you should show the code for your bitmap tile class as well.

Or, if you don't mind, you should attach all of your code into a ZIP/RAR file and post that.

You'd be surprised how completely unrelated a problem can be to where it occurs.

--- Kris Asick (Gemini)
--- http://www.pixelships.com

CGamesPlay

Member #2,559

July 2002

Also, use code tags when you post it.

--
Tomasu: Every time you read this: hugging!

Ryan Patterson - <http://cgamesplay.com/>

InfiniteLoop

Member #8,434

March 2007

Here is my CMenu::init() function. If there is a problem, I assume that it is here. The only different thing about this is the use of alpha blending for effect, maybe I need to turn alpha mode off afterwards?

1void CMenu::init()
2{
//bitmap init
okButton    = NULL;
cancelButton  = NULL;
imageText    = NULL;
challengeText  = NULL;
optionSquare  = NULL;
optionsBack    = NULL;
buffer      = NULL;
imageHighlight  = NULL;
easyText    = NULL;
mediumText    = NULL;
hardText    = NULL;
15 
okButton    = load_bitmap("images/okButton.bmp", NULL);
cancelButton  = load_bitmap("images/cancelButton.bmp", NULL);
imageText    = load_bitmap("images/imageText.bmp", NULL);
challengeText  = load_bitmap("images/challengeText.bmp", NULL);
easyText    = load_bitmap("images/challengeText.bmp", NULL);
mediumText    = load_bitmap("images/challengeText.bmp", NULL);
hardText    = load_bitmap("images/challengeText.bmp", NULL);
23 
//sprite sheet
imageSelect    = load_bitmap("images/sheet.bmp", NULL);
26 
buffer      = create_bitmap(SCREEN_W, SCREEN_H);
optionsBack    = create_bitmap(SCREEN_W, SCREEN_H);
optionSquare  = create_bitmap(SCREEN_W - 10, 200);
BITMAP *alpha  = create_bitmap(SCREEN_W, SCREEN_H);
imageHighlight  = create_bitmap(130, 130);
32 
//initialize them
clear_bitmap(buffer);
clear_to_color(alpha, makecol(200, 200, 200));
clear_to_color(optionSquare, makecol(82, 120, 189));
clear_to_color(imageHighlight, makecol(25, 25, 25));
38 
//prep options for trans
int x, y, c, a;
//set the alpha channel blend values
drawing_mode(DRAW_MODE_TRANS, NULL, 0, 0);
set_write_alpha_blender();
//blend the two bitmap alpha channels
for (y=0; y<alpha->h; y++) {
  for (x=0; x<alpha->w; x++) {
    //grab the pixel color
    c = getpixel(alpha, x, y);
    a = getr(c) + getg(c) + getb(c);
    //find the middle alpha value
    a = MID(0, a/2-128, 255);
    //copy the alpha-enabled pixel to the sprite
    putpixel(optionsBack, x, y, a);
  }
}
destroy_bitmap(alpha);  
57}

CGamesPlay

Member #2,559

July 2002

You haven't posted a single line of code that has anything to do with vectors.

[append]
But yeah, drawing_mode needs to be called again with DRAW_MODE_SOLID.

--
Tomasu: Every time you read this: hugging!

Ryan Patterson - <http://cgamesplay.com/>

InfiniteLoop

Member #8,434

March 2007

Quote:

You haven't posted a single line of code that has anything to do with vectors.

Irrelevant. Me writing a line of code to draw a vector graphic will do nothing to show that it does not show up.

At any rate:

Quote:

But yeah, drawing_mode needs to be called again with DRAW_MODE_SOLID.

this was the fix. Thank you

CGamesPlay

Member #2,559

July 2002

Oh, my mistake. I thought "vector" referred to the STL container class, not the grid. But it's fixed

--
Tomasu: Every time you read this: hugging!

Ryan Patterson - <http://cgamesplay.com/>