|
The solution is x=x0-y0*(x1-x0)/(y1-y0), not exactly what you wrote. Also, the code considers whether the given segment (not the whole line) intersects the x axis.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
|
|
|
|
|
Actually x0-y0*(x1-x0)/(y1-y0) = x1-y1*(x1-x0)/(y1-y0) = (x0y1-x1y0)/(y1-y0).
She's so dirty, she threw a boomerang and it wouldn't even come back.
|
|
|
|
|
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
|
|
|
|
|
BlackKattle wrote:
how do I write a variant of LineTo where I use SetPixel, instead of LineTo???
You don't have to. Just plug in your drawing (SetPixel) backend callback to LineDDA .
|
|
|
|
|
hello,
i need a matrix!!! but i have no const int values. my values are all int (because the values changed inside the programm). is there a possibility to make a two dimensional array (int array[n][m]) without const int values????
MFC
|
|
|
|
|
You must have one of the dimentions fixed, i bealive
use the operator "new"
Casa.Sapo.pt
|
|
|
|
|
You can possibly try a vector inside a vector, or a list of vectors, but your going to need VC++ 7, as I think templated templates are new to VC++.
Then again you could try Perl. It lets you do it.
|
|
|
|
|
No, you can do a vector of vectors in VC6.
Christian
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002
|
|
|
|
|
Didn't know that. For some reason, I though template templates where new to VC7.
Thanks.;)
Giles
|
|
|
|
|
in VC++ 6 I've used vector of vectors (and even more!), like this:
#typedef std::vector<string> StringVector;
#typedef std::vector<stringvector> StringMatrix;
and it works
nobody is perfect
|
|
|
|
|
What makes you think they need to be constant values ? Or do you mean for the dimensions ?
Do this:
int ** ppInt = new int[nRows];
for (int i = 0; i < nRows; ++i)
ppInt[i] = new int[nCols];
Now you can reference each element as ppInt[x][y] ( unless I got rows and columns the wrong way around, which I am want to do ).
As has been said, a vector of vectors is a better solution in terms of memory management, but if it were me, I'd probaby write a matrix class which wraps a int ** and does common matrix manipulations for me. Or search the web for one.
Christian
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002
|
|
|
|
|
thanks for reply.
yes, you are right, i mean the dimensions as constant values.
my compiler has problems with int ** ppInt = new int[nRows]; .
error: int* cannot convert in int**
and with ppInt[i] = new int[nCols]; .
error: int* cannot convert in int
what´s wrong?
nRows and nCols are integers in my program.
MFC
|
|
|
|
|
MFC is the Best wrote:
ppInt[i] = new int[nCols];.
try
ppInt[i] = new int*[ncols];
-c
No matter how fast light travels it finds the darkness has always got there first, and is waiting for it.
-- Terry Pratchett,
|
|
|
|
|
I need to display XML ( heirarchical view ) like in IE in a Edit box .
I am using the XML DOM mechanism to extract XML from the xml file .
the XMLnode->xml returns the XML string to me .
When i display it now I get text which doesnt look pretty .
as for eg I should get
<parent>
<child1>hello
<child2>hello2
all i get now is
<parent><child1>hello<child2>hello2
Please if anyone knows a better Control or Method of displaying this lemme know !
|
|
|
|
|
The .NET framework contains methods to return XML nicely formatted, if that's not available to you, I don't know if there is anything else, or if you'll need to parse it yourself. It's not hard though, just keep track of how many tabs in you are, and put returns after a >.
Christian
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002
|
|
|
|
|
In the code below IDC_EDIT1 is a dynamically created control. Does the MSG structure identify what control had focus when the message was sent? The outer IF statement works just fine, how do I write the inner IF statement?
Thanks
BOOL CTestDlgDlg::PreTranslateMessage(MSG* pMsg)
{
static int iCount=0;
// TODO: Add your specialized code here and/or call the base class
if(pMsg->message == WM_CHAR)
{
//if(dynamically created edit control IDC_EDIT1 has focus)
//{
TRACE("got %d\n", iCount++);
// }
}
return CDialog::PreTranslateMessage(pMsg);
}
|
|
|
|
|
an MSG struct has an hwnd member.
if (pMsg->hwnd = GetDlgItem(ID_...)) ...
-c
No matter how fast light travels it finds the darkness has always got there first, and is waiting for it.
-- Terry Pratchett,
|
|
|
|
|
Do I feel silly or what...
thank you Chris
|
|
|
|
|
Hi,
After trying my VC+ 6.0 with different things wihout any
success, can any one help me just to set my ListBox (as a ListCtrl)
BackGround becomes Black & the Text color becomes White?
Many thanks,
|
|
|
|
|
Does not CListCtrl::SetBkColor work?
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
|
|
|
|
|
Hi,
I am sorry about this, since I am working on a big project that involves ListBoxes & ListCtrl's ... I did mixed-up my message ListBox (as ListCtrl) ... I appologize for this!
Actually, I could not set BackGround color & Text color for my ListBox (not a ListCtrl)
You still can help?
Sorry & regards
|
|
|
|
|
One solution is to design a custom-draw.
http://www.codeproject.com/listctrl/xlistctrl.asp
Kuphryn
|
|
|
|
|
Hi,
I am sorry about this, since I am working on a big project that involves ListBoxes & ListCtrl's ... I did mixed-up my message ListBox (as ListCtrl) ... I appologize for this!
Actually, I could not set BackGround color & Text color for my ListBox (not a ListCtrl)
You still can help?
Sorry & regards
|
|
|
|
|
The only way I believe to change the color of a listbox is via owner-draw. You have to derived a class from CListBox or whatever and draw your own boxes. There are classes available that allows you to change its color.
Kuphryn
|
|
|
|
|
Hello,
I'm trying to write a small program that connects to an Oracle database.
Oracle delivers an oci.lib file when installing the Oracle client.
I'm also using a stream template to facilitate the working with Oracle API.
I include the oci.lib in my project's link tab, specify the location where the lib file can be found and everything works as expected. So far so good.
When I transfer my small program to a computer which doesn't have an Oracle client installed, the program complains about missing dll's. This, I can understand.
My question is: is it possible to statically link all the libraries/dll's in the lib file to my executable?
If I look at the dependecies, my program requires a lot of (Oracle) dll's. Will all of these dll's be statically linked to my executable?
And what exactly is a lib file. Just someting Visual C++ exports when you create a dll so other people can easily make use of the dll?
Thanks in advance
Wim
|
|
|
|