Is the texture initialized when you call glTexSubImage2D? You need to call glTexImage2D (not Sub) one time to initialize the texture object. Use NULL for the data pointer, OpenGL will then initialize a texture without copying data. answered EDIT You’re not supplying mipmaping levels. So did you disable mipmaping? glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILER, linear_interpolation ? GL_LINEAR : … Read more
I suspect there is some issue with OpenCL in latest NVidia drivers on some video cards. Here and here are some reports about those. Try to repeat test on GPU from another family.
“If it ain’t broke, don’t fix it.” See if you can find anyone telling you why Simplex is better. “It’s faster and extends to multiple dimensions” and “simplex noise attempts to reduce the complexity of higher dimensional noise functions” were what I found. Most of us work in 2 or 3 dimensions, maybe 4 if … Read more
There are mainly four texture compression types supported on Android: ETC1 (Ericsson texture compression). This format is supported by all Android phones. But, it doesn’t support an alpha channel, so can only be used for opaque textures. PVRTC (PowerVR texture compression). Supported by devices with PowerVR GPUs (Nexus S, Kindle fire, etc.). ATITC (ATI texture … Read more
All About OpenGL Objects The standard model for OpenGL objects is as follows. Objects have state. Think of them as a struct. So you might have an object defined like this: struct Object { int count; float opacity; char *name; }; The object has certain values stored in it and it has state. OpenGL objects … Read more