textures

I want to use image2D as 2D storage for vertices which will be modified by compute shader but things doesnt work. Create textures: glGenTextures(1, &HeightMap); glBindTexture(GL_TEXTURE_2D, HeightMap); glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA32F, 513, 513, 0,GL_RGBA32F, GL_UNSIGNED_BYTE, 0); Use and dispatch compute shader: glUseProgram(ComputeProgram); glActiveTexture(GL_TEXTURE0); glBindImageTexture(0, HeightMap, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32F); glDispatchCompute(1, 1, 1 ); glMemoryBarrier( GL_ALL_BARRIER_BITS ); And compute shader: #version 430 core layout( std430, binding=1 )

When it comes to 3D animation, there are a lot of terms and concepts that I'm not familiar with (maybe a secondary question to append to this one: what are some good books to get familiar with the concepts?). I don't know what a "UV" is (in the context of 3D rendering) and I'm not familiar with what tools exist for mapping pixels on an image to points on a mesh. I have the following image being produced by a 360-degree camera (it's actually the output of an HTML video element): I want the center of this image to be the "top" of the sphere, and any radius of the circle in this image to be an

I seem to be getting really blurry textures when I look at my textures up close. I am creating a minecraft-like terrain thing and I would like the textures to be pixelated - like it is made rather than XNA try to smooth it out for me. Here is how it appears: http://s1100.photobucket.com/albums/g420/darestium/?action=view&current=bluryminecraftterrain.png Any suggestions would be much appeciated. It's not related to anti-aliasing... it's related to how the hardware samples the texels in the texture. The default filter in XNA is usually Linear, but to get those "blocky" looking textures you must

I want to: create a read and writable 1-channel texture that contains integers. using a shader, write integer "I" to the texture. use the texture as a source, sample it and compare if the sample is equal to the integer I. All this with core profile 3.3. This is what I've got so far: I create the texture like so: glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_INT, (java.nio.ByteBuffer) null); I've Also tried GL_R8I and GL_RED_INTEGER, but that won't work. I bind this texture as my FBO, set blendfunc to (GL_ONE, GL_ONE) (additive) and render 1 quad using a shader that simply

I'm exporting a three.js material using material.toJSON() provided method, this is the result: { "metadata":{"version":4.5,"type":"Material","generator":"Material.toJSON"}, "uuid":"8E6F9A32-1952-4E12-A099-632637DBD732", "type":"MeshStandardMaterial", "color":11141120, "roughness":1, "metalness":0.5, "emissive":0, "map":"876D3309-43AD-4EEE-946F-A8AE8BA53C9E", "transparent":true,"depthFunc":3,"depthTest":true,"depthWrite":true, "textures":[ { "uuid":"876D3309-43AD-4EEE-946F-A8AE8BA53C9E", "name":"", "mapping":300, "repeat":[1,1], "offset":[0,0], "center":[0,0], "rotation":0, "wrap":[1001,1001],

When I load a texture in OpenGL and this has one ( GL_ALPHA ) or three components per pixel ( GL_RGB ), the texture appears tilted. What makes this happen? As additional detail, the relation width/height seems to affect. For example, an image of 1366x768(683/384) appears tilted while an image of 1920x1080(16/9) is mapped correctly. This is probably a padding/alignment issue. GL, by default, expects rows of pixels to be padded to a multiple of 4 bytes. A 1366 wide texture with 1 byte or 3 byte wide pixels, will not be naturally 4 byte aligned. Possible fixes for this are: Tell GL how your

I'm using ffmpeg to decode video via d3dva based on this example https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c . I'm able to succesfully decode video. What I need to do next is to render decoded NV12 frame. I have created directx rendering texture based on this example https://github.com/balapradeepswork/D3D11NV12Rendering and set it as shared. D3D11_TEXTURE2D_DESC texDesc; texDesc.Format = DXGI_FORMAT_NV12; // Pixel format texDesc.Width = width; // Width of the video frames texDesc.Height = height; // Height of the video frames texDesc.ArraySize = 1; // Number of