textures

The OpenGL SuperBible discusses texture buffer objects, which are textures formed from data inside VBOs. It looks like there are benefits to using them, but all the examples I've found create regular textures. Does anyone have any advice regarding when to use one over the other? According to the extension registry , texture buffers are only 1-dimensional, cannot do any filtering and have to be accessed by accessing explicit texels (by index), instead of normalized [0,1] floating point texture coordinates. So they are not really a substitution for regular textures, but for large uniform arrays

Following problem: I have two textures and I want to combine these two into a new texture. Thus, one texture is used as background, the other will be overlaid. The overlay texture is getting initialized with glClearColor(1.0, 1.0, 1.0, 0.0). Objects are draw onto the texture, these objects do have alpha values. Now blending between the two textures leaves a white border around the objects. The border comes from the fact that the background color in the second texture is white, isn't it? How can I use alpha blending where I do not have to think about the background color of the overlaying

I try to use data raw texture using GL_TEXTURE_RECTANGLE_ARB: void Display::tex(){ GLubyte Texture[16] = { 0,0,0,0, 0xFF,0xFF,0xFF,0xFF, 0xFF,0xFF,0xFF,0xFF, 0,0,0,0 }; GLuint Nom; glLoadIdentity();//load identity matrix glTranslatef(0.0f,0.0f,-4.0f);//move forward 4 units glEnable(GL_DEPTH_TEST); //Active le depth test glDisable( GL_CULL_FACE ); glEnable (GL_TEXTURE_RECTANGLE_ARB); glPixelStorei(GL_UNPACK_ROW_LENGTH, 2); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glGenTextures(1, &Nom); glBindTexture(GL_TEXTURE_RECTANGLE_ARB, Nom); glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,

I searched a lot but didn't find anything. I want to make a background for a layout , but instead of filling it with a color or a gradient I want to fill it with a texture and repeat it . I tried this but it didn't work . Can you tell me a solution. card_texture.xml <?xml version="1.0" encoding="utf-8"?> <bitmap xmlns:android="http://schemas.android.com/apk/res/android" android:src="@drawable/paper_texture" android:tileMode="repeat" /> card_shape.xml <?xml version="1.0" encoding="utf-8"?> <shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android"> <solid

What I've noticed when running project on iPhone 6+ simulator is that simulator don't pick up right images. Instead of @3x, @2x images are used. I tried reseting simulators content and settings, clean project and delete derived data from organizer and same thing still happens. When I look for the myatlas.atlasc folder inside the myapp.app (show package contents) at the path: /Users/username/Library/Developer/Xcode/DerivedData/appname-appspecificgeneratedstring/Build/Products/Debug-iphonesimulator/appname.app I can see myatlas.atlasc (note that this is not myatlas.atlas) and inside there are

In the main function: img = cvLoadImage("test.JPG"); //openCV functions to load and create matrix CvMat *mat = cvCreateMat(img->height,img->width,CV_8SC3 ); cvGetMat( img, mat,0,1); //creating the 3-dimensional array during runtime data = new float**[img->height]; for(int i=0;i<img->height;i++){ data[i] = new float*[img->width]; } for(int i=0;i<img->height;i++){ for(int j=0;j<img->width;j++) data[i][j] = new float[3]; } //setting RGB values for(int i=0;i<img->height;i++) { for(int j=0;j<img->width;j++) { CvScalar scal = cvGet2D( mat,i,j); data[i][j][0] = scal.val[0]; data[i][j][1] = scal.val[1