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hello guys.
Im not a graphics person but I need help with something.I need a man, preferebly South African with all the states.I want to be able to click on the individual states and get to another picture.Im designing a web page for my company and I have subsidiaries in different states.I want info of those subsidiaries when I click, which I can display on the page.How do I get a map like that.ive googled and don get anything.
kagiso
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Create a second bitmap with the same dimensions which you don't display. Give each unique area a unique color.
The next step is, when the user clicks your bitmap get the mouse coordinates relative to your bitmap and use these coords on your internal map.
DWORD ID = GetPixel( x, y );
switch ( ID )
{
case 12: //South African;
}
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Can any one provide me links or docs for perspective image transform
i wanna implement perspective transform on images.
I had look at AGG but its so much complicated to undersrand the actual logic due to templates.
Pleasae some guidnace will highly appreciated..
Please urgent..
Thanks,
Sandip.
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SandipG wrote: Can any one provide me links or docs for perspective image transform
i wanna implement perspective transform on images.
http://en.wikipedia.org/wiki/3D_projection[^]
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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www.geocities.com/eyalzach/tdt.zip
good luck 
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hi people!
can anyone tell me how to copy to a bitmap what's under my window? I was trying to get full aero effect in XP, bluring, light aura ect. got OK, but I can't get waht to blur 
P.S. Sorry for my horryble English...
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The best way i can suggest is to grab a screenshot of the entire desktop and then grab the area around your window which can be done by using the top, left, width and height properies of the form.
Here is a link to code to screenshot the desktop
http://www.developerfusion.co.uk/show/4630/[^]
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thanks man! but but this code seems difficult to translate, if you know something like this in Delphi, please let me know...
and "grab a screenshot of the entire desktop and then grab the area around your window" seems too slow  and I need to draw my window to it myself, like dsct.Canvas.draw(wndpo.x,wndpos.y,wndbitmap);
P.S. I hope Delphi is not a shame here....
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hi all,
I ve a problem.I created a user control(Marquee control,logic:-drawing the string at system.Threading.Timer event),it is working fine.When I place the control in one of the form(form is accessing a web service,will take few seconds to get the data),control is not running smoothly.it is hanging for a while (web serice cause the delay).I created a thread & put the WS,Now the form(GUI) is hanging for a while,when it refresh the marquee text is running like Fast forward for a while.It means the marquee is running at the back ground, but I can not see,how to make marquee visible(running smoothly)
Thanks in advance,
ebin
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Hi, I'm creating a button, that has specified BG color. Color of it's text is calculated using simple algorithm from this BG color. For this purpose, I use HSL color scheme. algorithm of text color calculation is very simple :
Hue - same as background
Saturation - 0
Luminance - if background luminance exceeds 0.5f , set 0F, else 1f
otherwords - use white color if the bacground color is kind of dark, otherwise use black color.
And now my problem :
lets say we have a color like :
Hue = whatever
Saturation = 1f
Luminance = .5f
(that should be clearest mixture for any hue)
the problem is that some color values are very bright in this configuration and some are very dark:
pure blue (0.66 hue) - too dark
cyan (0.5f hue) - too bright
so sometimes the difference(for human eye) between specified background color and calculated text color is almost none (even when luminance difference is at least .5f)
can you help me out with any better way to calculate text color (I would like to keep it in gray scale)
thanx
I hope you'll understand my English ))
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I'm trying to add visual effects to the desktop.
I want to be able to use the desktop as normal at the same time.
This is what I have been coding so far. But the triangle is never painted to the screen.
<br />
#include <windows.h><br />
#include <gl/gl.h><br />
<br />
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)<br />
{<br />
HDC hDC;<br />
HGLRC hRC;<br />
float theta = 0.0f;<br />
<br />
<br />
PIXELFORMATDESCRIPTOR pfd;<br />
int format;<br />
<br />
hDC = GetWindowDC(NULL);<br />
<br />
ZeroMemory( &pfd, sizeof( pfd ) );<br />
pfd.nSize = sizeof( pfd );<br />
pfd.nVersion = 1;<br />
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;<br />
pfd.iPixelType = PFD_TYPE_RGBA;<br />
pfd.cColorBits = 24;<br />
pfd.cDepthBits = 16;<br />
pfd.iLayerType = PFD_MAIN_PLANE;<br />
format = ChoosePixelFormat( hDC, &pfd );<br />
SetPixelFormat( hDC, format, &pfd );<br />
<br />
hRC = wglCreateContext( hDC );<br />
wglMakeCurrent( hDC, hRC );<br />
<br />
<br />
while ( true )<br />
{<br />
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );<br />
glClear( GL_COLOR_BUFFER_BIT );<br />
<br />
glPushMatrix();<br />
glRotatef( theta, 0.0f, 0.0f, 1.0f );<br />
glBegin( GL_TRIANGLES );<br />
glColor3f( 1.0f, 0.0f, 0.0f ); glVertex2f( 0.0f, 1.0f );<br />
glColor3f( 0.0f, 1.0f, 0.0f ); glVertex2f( 0.87f, -0.5f );<br />
glColor3f( 0.0f, 0.0f, 1.0f ); glVertex2f( -0.87f, -0.5f );<br />
glEnd();<br />
glPopMatrix();<br />
<br />
SwapBuffers( hDC );<br />
<br />
theta += 1.0f;<br />
}<br />
<br />
return 0;<br />
<br />
}<br />
Have anyone done something like this before?
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Firstly, what do the #includes actually include. I assume they are unimportant and have either been left out or forgotten.
But more to the point, you should have a look at PFD_DRAW_TO_WINDOW in the variable pfd.dwFlags. I too am using OpenGL for a small project I am making. I don't know that much about it but i think you might have to set it to draw to the DESKTOP. I think the desktop is just a special kind of window.
What you are trying to do sounds interesting. Let me know when you have it working
--------------------------------
Customer in computer shop: "Can you copy the Internet onto this disk for me?"
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Is there anything out there as an Open Source, that I can use to open the AutoCAD drawing (*.DWG extension)without requiring AutoCAD. I have searched online a lot but didn't find anything useful that I can use in my application development.
Any help in this matter will be great. Thanks for your time. looking forward to hear from the experts out there.
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Open Design Alliance[^] offers a full DWG API. It's free so long as you are using it internally. There are significant costs if you want to license it to include in a product you plan to sell.
Cheers,
Drew.
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Hi, i am writing an app that copies the screen, warps/distorts the image, then draws it back. I already got the code working in a visualization i am making for Windows Media Player but for some reason it won't work now.
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
enableBlend();
glColor4f(1.0f, 1.0f, 1.0f, 0.9f);
renderBackground(wf);
enableTexture(image);
glBegin(GL_QUADS);
glTexCoord2f(0, 1); glVertex2f(0, 0);
glTexCoord2f(0, 0); glVertex2f(0, 512);
glTexCoord2f(1, 0); glVertex2f(512, 512);
glTexCoord2f(1, 1); glVertex2f(512, 0);
glEnd();
glBindTexture(GL_TEXTURE_2D, backTexture);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 512, 512, 0);
disableTexture();
disableBlend();
That's basically it, renderBackground() draws the texture over a grid of warp points which is stored in a WarpFile object. The enable/disable methods are just wrappers for the OpenGL commands. Is there anything i am doing wrong? I tried pbuffers do copy/render to but it was too hard.
If you need me to post more code (like the renderBackground method) just ask
thanks
--------------------------------
Customer in computer shop: "Can you copy the Internet onto this disk for me?"
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VizCoder wrote: That one bug has really been p...
You should consider switching to a modern programming language ...
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Get in the habit of doing this:
if (BG_WARP == bgType)
That won't compile with the single =
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I wanna change Hue of image how can i do ??
Using ColorMatrix or using manual loop Lockbits(),Unlockbits..
Please help Urgent.
I tried to see QColorMatrix but its little complicated..
i am already doing lot of processing on image using color matrix as well as looping(lockbits and unlockbits.) also.
Also i waana know how can i control blur ?? if i Apply blur filter it does blur little if i waanna blur more do i have to apply blur filter again and again on the blurre image???
Is there way to control blurr using some factor in only one filter??
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How can I highlight a specific part of an Image in a PictureBox or an Image on a Label in C#.NET.
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I'm trying to turn my PPM (lossless image file) into a texture, but the texture is not showing up correctly. I've tried loading a bitmap image as a texture using glaux and a call to auxDIBImageLoad(), however, I would simply like to implement my own parser for PPM. Basically, in PPM, the line after the getting the value for "int maxValue" is a long line of binary data that stores the 8-bit RGB (total 24 bits) going from left to right, top to bottom in the image. If we think about this in a 2D coordinate system, parsing the file would first get you (x, y) = (0, 0), then (1, 0), then (2, 0), until the end of the width, then (0, 1), and etc.
Knowing this, does anyone know why my texture is being parsed incorrectly?
ifstream texFile("brickbump.ppm");
if (texFile.is_open())
{
char propBuf[8];
texFile.getline(propBuf, 8);
string format = propBuf;
texFile.getline(propBuf, 8);
int x = atoi(propBuf);
texFile.getline(propBuf, 8);
int y = atoi(propBuf);
texFile.getline(propBuf, 8);
int maxValue = atoi(propBuf);
char* texArray = new char[3 * x * y];
int count = 0;
while (!texFile.eof())
{
texFile.get(texArray[count]);
count++;
}
glGenTextures(1, &m_textures[0]);
glBindTexture(GL_TEXTURE_2D, m_textures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, x, y, 0, GL_RGB, GL_UNSIGNED_BYTE, texArray);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
delete [] texArray;
}
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I am allowing users to resize images dynamically using CRectTracker .
What i observed is while resizing using mouse sometimes images appears blurred and if i further resize again it becomes good this keeps on happening.
I have set Interpolation mode to InterpolationmodeHighQualityBicubic.
What can be the reason for image to appear blurred.??
i am little confused with this as everytime it follows same code flow.
and every time i am using one original image for resizing(the resized image is not used for further resizing.)
Some hellp or some hints would be highly appreciated.
Thanks,
Sandip.
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What is CRectTracker ?
The blurring is what a bicubic filter does, it blends values from imaginary subpixels, so as not to create a harsher effect by simply rounding the values.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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