shader

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am writing a simple script in Python using Selenium to detect an element by its Css selector. I am accessing the Google page, and am targeting the input, by its CSS selector, which is input[name=q] The Chrome page opens as planned, but the issue is that it closes without actually finding the input, and throws the following error in the terminal: ERROR:shader_disk_cache.cc(237)] Failed to create shader cache entry: -2 I tried running the script when Google Chrome is closed, and even went as far as to close all the Chrome processes in Task

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to light to the texture plane but this is not work. Light on solid sphere is very well, but texture plane is not light. Whole Image Lighting on solid-sphere is working well. But, lighting on texture plane is not working. (GL_DECAL, GL_REPLACE; I also tried GL_MODULATE) This is a snippet of my rendering code. ( Whole code on GitHub ) Loading texture. sf::Image image; if (!image.loadFromFile(path)) return false; glGenTextures(1, &id); glBindTexture(GL_TEXTURE_2D, id); glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, image.getSize().x, image

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've just implemented deferred rendering and am having trouble getting my skybox working. I try rendering my skybox at the very end of my rendering loop and all I get is a black screen. Here's the rendering loop: //binds the fbo gBuffer.Bind(); //the shader that writes info to gbuffer geometryPass.Bind(); glDepthMask(GL_TRUE); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_DEPTH_TEST); glDisable(GL_BLEND); //draw geometry geometryPass.SetUniform("model", transform.GetModel()); geometryPass.SetUniform("mvp", camera

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to use geometry shaders to turn points into line segments (GL_POINTS to GL_LINE_STRIP), but no line segments appear. If I change the input to GL_LINES, and just repeat the vertex, then I get the behavior I'm expecting. What's going on? Here's a complete program that demonstrates the behavior. As-is, I get nothing but a black window. Setting USE_POINTS to False gets me the rotating psychedelic flashing lines I'm expecting. #!/usr/bin/python from OpenGL.GL import * from OpenGL.GLU import * from OpenGL.GLUT import * from OpenGL.GL

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am trying to add shaders with GLFW/GLEW. I am getting an error that the shaders are loaded but they don't have valid object code. This is the code I have for loading the shaders: class SHADER { public : void LoadShaders ( const char * vertexFile , const char * fragmentFile ); char * vertexShader ; char * fragmentShader ; private : int Load ( const char * filename , char *& shaderSource ); fstream file ; }; int SHADER :: Load ( const char * filename , char *& shaderSource ) { file . open ( filename , ios :: in ); if ( file . is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: The documentation for use of the python wrappers for GTk3 are somewhat limited. I have found several of the common widget examples. I am trying to use the Gtk.GLArea widget. The API documentation is for C and I have not had much luck guessing the equivalent python calls to use this widget. In the example the widget is created using the following C code: // create a GtkGLArea instance GtkWidget *gl_area = gtk_gl_area_new (); g_signal_connect (gl_area, "render", G_CALLBACK (render), NULL); Then the render function has openGL commands in it:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have problem with fragment shader in libgdx. Below is my fragment shader. #ifdef GL_ES precision mediump float ; #endif uniform float u_aspectRatio ; varying vec2 v_texCoords ; uniform sampler2D u_texture ; void main () { gl_FragColor = texture2D ( u_texture , v_texCoords ); } In program I do shader . setUniformi ( "u_texture" , 0 ); // work fine shader . setUniformf ( "u_aspectRatio" , 0.0f ); //no uniform with name 'u_aspectRatio' in shader shader.isCompiled() return true and first set work fine, but in second I have error "no

Shading mode 只要三角面的代表点（如：三角面中的第一个index点）被光照到什么颜色，就决定了该三角面的整个面的颜色。 某特殊情况，大家应该可以想象到： 如果一个很大的三角面中，第一个index点一个聚光灯照到，那么整个大三角面绘制出来的就是光源色 如果一个很大的三角面中，几乎被一个聚光灯照射到整个面，但就没照射到代表点（第一个index点），那么整个大三角面绘制出来的光源色就没有这个聚光灯的光源色 与Flat相比，仅仅是三角面所有像素颜色是根据三个顶点的光源色插值算出来的，所以上述Flat shading的某特殊情况，Gouraud shading也有类似的问题（顶点没被关照到时的颜色问题） 相比前两者的shading mode，该模式处理光照数据是在fragment阶段处理的，所以能精确控制到没个像素上，当然开销就比较大，像素处理光照时，每个像素的所在的三角面计算光照时的法线都会插值计算一下(根据三角面三顶点插值)，所以每个像素处理出来的光照效果是最平滑的。 Flat, Gouraud shading 都是在vertex阶段处理光照数据的 Phong shading是在fragment阶段处理光照数据的 所以如果我们用到了这三种光源处理shading，就按我们需要的风格来选择。 工程下载 (u3d ver : 2017.4.3f1, vs : vs2017

写在前面 Unity从学习到工作至今已经有三个年头了，开发中每次遇到难点第一件事就是百度搜索，从来没有自己的想法，甚是惭愧。想着不能再这样浑浑噩噩下去了，也决定开个博客，记录一下开发中自己觉得有用的东西，希望日后某一天回顾起来不会觉得日子白过，如果还能帮助到有需要有同学那就再好不过了。 关于Shader candycat 这个博主。工作后陆续遇到了shader方面的问题，基本都是无法个人解决的，带我的人就向我推荐了这个博主。当时连个CSDN账号都懒得登录，就这样一篇一篇的看着她的文章学习起了shader，期间还买了她出过的shader书籍，不过现在都还没看完，十分惭愧。学习到现在，虽然说无法吃透shader，但起码阅读起shader的代码，写一些简单的shader效果是没多大问题的。说起来 candycat 还是女生，年纪比我还小，无意识间敬佩又增加了一分。 正文 这里 看看。因为我是学Unity的，所以还是偏向于Shadertoy转Unity的Shaderlab之后的运用。首先要说的是 candycat 的那个shadertoy转shaderlab的模板。下面是这位博主的原代码。 //Design By candycat(https://blog.csdn.net/candycat1992) Shader "Shadertoy/Template" { Properties{

写在前面 Unity部分 Shader "Custom/circle" { Properties { //xy表示圆心在屏幕中的uv值,z为半径,w为圆边缘的平滑值 _parameters("circleParameter",Vector)=(0.5,0.5,10,0) _Color("circleColor",COLOR)=(1,1,1,1) } SubShader { Tags { "RenderType"="Opaque" } LOD 200 Pass{ CGPROGRAM #include "UnityCG.cginc" #pragma fragmentoption ARB_precision_hint_fastest #pragma target 3.0 #pragma vertex vert #pragma fragment frag #define vec2 float2 #define vec3 float3 #define vec4 float4 #define mat2 float2 #define mat3 float3 #define mat4 float4 #define iGlobalTime _Time.y #define mod fmod #define mix lerp #define fract frac #define Texture2D