textures

I'm using texture atlas for handling my images. I didn't created the atlas by myself however I let Xcode to do this for me: My question is: How can I see this file or know its properties (I mean, sizes and weight)? What if and how can I know if the sizes exceed the maximum size of 4098 x 4098 pixel? 来源： https://stackoverflow.com/questions/33561727/how-check-the-spriteatlas-sizes-generated-by-xcode

i use D3DXCreateSphere method to create sphere mesh. and i want to apply an earth texture on it. i calculate the texture coordinate in pixel shader with following code: sampler ShadeSampler = sampler_state { Texture = (ShadeTex); AddressU = Mirror; AddressV = Mirror; MinFilter = LINEAR; MagFilter = LINEAR; MipFilter = LINEAR; }; PS_OUTPUT PSMain(VS_OUTPUT input){ PS_OUTPUT output = (PS_OUTPUT)0; vector uv; uv.x = 0.5 + atan2(input.normal.z, input.normal.x) / piMul2; uv.y = 0.5f - asin(input.normal.y) / pi; vector b = tex2D(ShadeSampler, uv.xy); output.diffuse = b * input.diffuse; return output

I'm trying to make a simple game and when I try rendering my SDL_Texture , I get an inexplicable error. I've set up everything right, I'm able to successfully clear the screen with SDL_RenderClear , and my texture isn't null, so it should have been created properly. But when I try calling the render() function I get an error, and SDL_GetError() returns "Invalid texture". Edit: I have now created an MCVE as requested, and I tested it to verify that it reproduces the error. It should display the image at the path "gfx/grid.bmp" in the window, but instead it gives me the error. Here is the full

I am having trouble fetching a texture of floats. The texture is defined as follows: texture<float, 2, cudaReadModeElementType> cornerTexture; The binding and parameter settings are: cornerTexture.addressMode[0] = cudaAddressModeClamp; cornerTexture.addressMode[1] = cudaAddressModeClamp; cornerTexture.filterMode = cudaFilterModePoint; cornerTexture.normalized = false; cudaChannelFormatDesc cornerDescription = cudaCreateChannelDesc<float>(); cudaBindTexture2D(0, &cornerTexture, cornerImage->imageData_device, &cornerDescription, cornerImage->width, cornerImage->height, cornerImage->widthStep);

I'm creating an openGL game and so far I have been using .pngs in the RGBA8888 format as texture sheets, but those are too memory hungry, and my app crashes frequently. I read in Apple's site that such format such be used just when too much quality is needed, and recommends to use RGBA4444 and RGBA5551 instead ( I already converted my textures to PVR but the quality loss is too great in most of the sprite sheets). I only need to use GL_UNSIGNED_SHORT_5_5_5_1 or GL_UNSIGNED_SHORT_4_4_4_4 in my glTexImage2D call inside my texture loader class in order to load my textures, but I need to convert

I have been working on porting an open source game written using a fixed function pipeline to Metal. I have been able to redo all the projection transformation and have things being drawn where they should be drawn with the correct texture and vertex information but I'm having lots of trouble getting the fragment shader to match the OpenGL blending, the textures look correct but the blending and brightness are off. Here is what I'm trying to match: here is how it is currently rendering: The code I can see controlling the GL Blending looks like: glShadeModel(GL_SMOOTH); glEnable(GL_ALPHA_TEST);