texture-mapping

I'm trying to render a simple texture(64x64) to a 64x64 quad. The quad itself is rendering, but, not the texture. (It's rendering a blank white 64x64 quad.) I'm using SOIL to load the image. static GLuint LoadPNG(char* filename) { GLuint texture = SOIL_load_OGL_texture ( filename, SOIL_LOAD_AUTO, SOIL_CREATE_NEW_ID, SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT ); if (texture == 0) Log("Texture Load Error: " + string(filename)); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); return

How can I repeat a selection of a texture atlas? For example, my sprite (selection) is within the texture coordinates: GLfloat textureCoords[]= { .1f, .1f, .3f, .1f, .1f, .3f, .3f, .3f }; Then I want to repeat that sprite N times to a triangle strip (or quad) defined by: GLfloat vertices[]= { -100.f, -100.f, 100.f, -100.f, -100.f, 100.f, 100.f, 100.f }; I know it has something to do with GL_REPEAT and textureCoords going passed the range [0,1] . This however, doesn't work: (trying to repeat N = 10) GLfloat textureCoords[]= { 10.1f, 10.1f, 10.3f, 10.1f, 10.1f, 10.3f, 10.3f, 10.3f }; We're

I'm trying to understand Textures, Texture Units and Samplers in OpenGL 4.5. I'm attaching a picture of what I'm trying to figure out. I think in my example everything is correct, but I am not so sure about the 1D Sampler on the right side with the question mark. So, I know OpenGL offers a number of texture units/binding points where textures and samplers can be bound so they work together. Each of these binding points can support one of each texture targets (in my case, I'm binding targets GL_TEXTURE_2D and GL_TEXTURE_1D to binding point 0 , and another GL_TEXTURE_2D to binding point 1 ).

I have a set of points [x,y]=meshgrid(1:N,1:M) defined on a regular 2D, N x M grid. I have another set of points [u,v] that are some deformation of the original grid, i.e [u,v]=f(x,y)' (however I do not have the actual f that caused the deformation). How can I map a texture to the "deformed" grid defined by u,v ? i.e., given an image with aspect-ratio N/M how can I map it to the deformed grid? I think you are asking to get samples of the original texture at [u,v] . You can use interp2 . Let's say that the texture samples are in z and you want new samples z2 . To interpolate the original

How do I create a cube map in D3D11 from 6 images? All the examples I've found use only one .dds. Specifically, how do I upload individual faces of the cube texture? It works like this: D3D11_TEXTURE2D_DESC texDesc; texDesc.Width = description.width; texDesc.Height = description.height; texDesc.MipLevels = 1; texDesc.ArraySize = 6; texDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; texDesc.CPUAccessFlags = 0; texDesc.SampleDesc.Count = 1; texDesc.SampleDesc.Quality = 0; texDesc.Usage = D3D11_USAGE_DEFAULT; texDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE; texDesc.CPUAccessFlags = 0; texDesc.MiscFlags

It is possibile to create a texture (to use on a element in a canvas) from the getImageData array of another canvas (in the same html page)? maybe without three.js? Thanks a lot, Jennifer The coolest thing about WebGL's texImage2D method is that its last argument can be a DOM element instead of an ArrayBuffer, in which case it copies its rendered content into your texture object. For example: var canvas2d = document.getElementById('canvas2d'); gl.bindTexture(gl.TEXTURE_2D, myTexture); gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true); gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED