photocopy texture

In the previous example, we either directly assign a color value to the vertex, or set the diffuse and specular coefficients in the vertex attribute to calculate the surface color of the Object Based on illumination parameters, however, the color will be much less realistic. If we map an image directly to the triangle surface to obtain the surface color value of the object, the effect will be much better, such as the two images below, the picture on the right maps an image to two triangles.

1. Create a texture imageOpenGL requires that the texture height and width must both be the Npower of 2. This texture image is valid only when this condition is met. Once the pixel value is obtained, we can pass the data to OpenGL to generate a texture map for OpenGL:Glgentextures (1, @

I. texture filtering: When the polygon in a 3D space changes to a set of pixels on a two-dimensional screen through coordinate transformation, projection, raster, and other processes, each pixel needs to be sampled in the corresponding texture image, this process is called texture filtering. Ii. texture filtering is ge

Details about the Texturing texture of OpenGL ES 3.0 (2), opengltexturing Texture Filtering and Mipmapping Texture Filtering and multi-level Texture We have already introduced the 2D texture of a single 2D image. This article mainly describes multi-level textures.

Label: SDL direct3d OpenGL texture The previous article analyzed the sdl_createrenderer () function used to create a Renderer in SDL (). This article continues to analyze the source code of SDL. This document analyzes the SDL texture (sdl_texture ). The code process for playing a video by using SDL is as follows. Initialization: Sdl_init (): Initialize SDL. Sdl_createwindow (): create a win

SDL2 source code analysis 4: texture (SDL_Texture), sdl2sdl_textureThe previous article analyzed the SDL_CreateRenderer () function used to create a Renderer in SDL (). This article continues to analyze the source code of SDL. This document analyzes the SDL texture (SDL_Texture ).The code process for playing a video by using SDL is as follows.Initialization: SDL_Init (): Initialize SDL. SDL_CreateWindow

OpenglES2.0 for Android: Further discussion on texture mapping prefaceIn the previous section we implemented a simple texture mapping example-a simple map, this section we do some slightly more complicated examples, and finally give us a texture in front of the cube.Texture stretchingRepeat stretch modeThis is a frequently used

3. Texture triangle 　 Although the triangle in the previous chapter looks bright, it is often not practical. We want to display an image on a triangle, or more appropriately, we want to display the part corresponding to the triangle in an image. This can be achieved through practical texture images. This is the purpose of this chapter. To enable webgl to access the specified image data, we need to save the

Author: Fan yipeng When you do texture ing, do you often notice the obvious sertices displayed on the screen, and the texture pixels you use are too obvious? Now we will talk about how to solve this problem, and the method we use is to filter your texture. Next, we will introduce several common filtering methods. At last, we will introduce the implementation of b

By ho minggui (http://blog.csdn.net/hmg25)Reprinted please indicate the source The previous examples are solid 3D models. Today, we began to attach the gorgeous textures to these models to make them look closer to the real objects we remember. Function startup To use textures, we need to turn on some OpenGL switches to start some of the features we need: gl.glEnable(GL10.GL_TEXTURE_2D); . This call is indispensable. If you do not enable this function, you cannot map the image to a polygon.

Rectangle TextureThe texture target is gl_texture_rectangle.First, the rectangular texture cannot be mip-mapped;Then, the rectangular texture is not normalized (actually addressing the pixels)Finally, texture coordinates cannot be duplicated, and texture compression is not s

I. Summary The Finnish IT service company digia OYj said that the company would invest 4 million euros to buy Nokia's QT software business, digia OYj said, the company will invest 4 million euros to purchase Nokia's QT software business. QT is a very good team. I hope QT will develop better after leaving Nokia. After the previous tutorial, we have a preliminary understanding of the 3D world. Today we want to learn about light and texture filtering. Ii

Tags: SDL OpenGL direct3d texture function call The previous article analyzed the texture creation function sdl_createtexture () of SDL (). This article continues to analyze the source code of SDL. This article analyzes the sdl_updatetexture () function of SDL to update texture data (). The code process for playing a video by using SDL is as follows. Initializa

OpenGL cubic Map CopyrightNVIDIA Corporation, 1999. Specified cial publication in written, electronic, or other forms without expressed written permission is prohibited. Electronic redistribution for educational or private use is permitted. SummaryThis tutorial explains the purpose of hardware cube textures. Cube maps can be used for Environment Maps, stable specular highlights, and bump maps for Pixel-by-pixel illumination ). Programmers can download the instance code and learn about OpenGL. Ex

SDL2 source code analysis 5: Update texture (SDL_UpdateTexture ()), The previous article analyzed the texture creation function SDL_CreateTexture () of SDL (). This article continues to analyze the source code of SDL. This article analyzes the SDL_UpdateTexture () function of SDL to update texture data (). The code process for playing a video by using SDL is as

Reprint Please specify source: http://www.cnblogs.com/Ray1024I. OverviewWe all know that direct2d can load and display pictures, but don't know if you ever think that this 2D graphics engine can be blended with textures? If we can do texture blending, then our 2D graphics engine can do more things, such as the concept of masks, we can do a lot more work on the image.People who have touched the knowledge of 3D rendering know the shader, in 3D rendering

Note: The article is translated from http://wgld.org/, the original author Sambonja 広 (Doxas) The effect of this demo Lufy: First wordy a few words, really good years did not write a blog, after the work to re-contact HTML5 development, although not as strong as before the desire to write the article, but looked at the previous WebGL tutorial only translated a half, so good tutorial, so broken more also really pity, So I'll try to take some time to fill in this part of the article. attributes

Fixed: I looked at the terrain of the torque engine demo and found that he had used at most three textures in a square. Three texture stages are required for the three pasters, and two stages with Alpha values are added. A total of five texture stages are required. This is too demanding for the video card. At least my video card supports only four texture stage

Create a texture object 1: HRESULT CreateTexture(2: uint width,//Width3: uint height,//Height4: uint levels,//Multilevel progressive texture sequence level5: DWORD usage,//Purpose6: d3dformat format,//Pixel format7: d3dpool,//Memory Pool Type8: idirect3dtexture9 ** pptexture,//Texture Object Pointer created9: handle * psharedhandle // reserved value; con

Rendering to textures is an advanced technology in d3d. On the one hand, it is very simple, on the other hand it is very powerful and can produce many special effects. For example, the luminous effect, Environment ing, and shadow ing can all be achieved through it. Rendering to texture is only an extension of rendering to the surface. We only need to add more. First, we need to create a texture and take pre