十八，镜面IBL-打印预过滤环境贴图

前面打印了各个级别的hdr环境贴图，也能看到预过滤环境贴图，现在进行打印各个级别的预过滤环境贴图。

运行结果如下
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
代码如下：
#include <osg/TextureCubeMap>
#include <osg/TexGen>
#include <osg/TexEnvCombine>
#include <osgUtil/ReflectionMapGenerator>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <osg/NodeVisitor>
#include <osg/ShapeDrawable>
#include <osgGA/TrackballManipulator>
#include <osgDB/WriteFile>

static const char * vertexShader =
{
//“#version 120 core\n”
“in vec3 aPos;\n”
“varying vec3 localPos;\n”
“void main(void)\n”
“{\n”
“localPos = aPos;\n”
" gl_Position = ftransform();\n"
//“gl_Position = view * view * vec4(aPos,1.0);”
“}\n”
};

static const char psShader =
{
“varying vec3 localPos;\n”
“uniform samplerCube environmentMap;”
“uniform float roughness;”
“const float PI = 3.1415926;”
“float VanDerCorpus(uint n, uint base) "
“{ "
" float invBase = 1.0 / float(base); "
" float denom = 1.0; "
" float result = 0.0; "
" for (uint i = 0u; i < 32u; ++i) "
" { "
" if (n > 0u) "
" { "
" denom = mod(float(n), 2.0); "
" result += denom * invBase; "
" invBase = invBase / 2.0; "
" n = uint(float(n) / 2.0); "
" } "
" } "
“return result; "
“} "
" "
“vec2 HammersleyNoBitOps(uint i, uint N) "
“{ "
" return vec2(float(i) / float(N), VanDerCorpus(i, 2u)); "
“} "
//“float RadicalInverse_Vdc(uint bits)\n”
//”{”
//“bits = (bits << 16u) | (bits >> 16u);”
//“bits = ((bits & 0x55555555u) << 1u ) | (bits & 0xAAAAAAAAu) >> 1u);”
//“bits = ((bits & 0x33333333u) << 2u ) | (bits & 0xCCCCCCCCu) >> 2u);”
//“bits = ((bits & 0x0F0F0F0Fu) << 4u ) | (bits & 0xF0F0F0F0u) >> 4u);”
//“bits = ((bits & 0x00FF00FFu) << 8u ) | (bits & 0xFF00FF00u) >> 8u);”
//“return float(bits) * 2.3283064365386963e-10;”
//”}”
//“vec2 Hammersley(uint i, uint N)”
//”{”
//“return vec2(float(i) / float(N), RadicalInverse_Vdc(i));”
//”}"
“vec3 ImportanceSampleGGX(vec2 Xi, vec3 N, float roughness)”
“{”
“float a = roughness * roughness;”
“float phi = 2.0 * PI * Xi.x;”
"float cosTheta = sqrt((1.0 - Xi.y)/(1.0+(aa-1.0) * Xi.y));"
“float sinTheta = sqrt(1.0 - cosTheta * cosTheta);”
“vec3 H;”
“H.x = cos(phi) * sinTheta;”
“H.y = sin(phi) * sinTheta;”
“H.z = cosTheta;”
“vec3 up = abs(N.z) < 0.999 ? vec3(0.0,0.0,1.0) : vec3(1.0,0.0,0.0);”
“vec3 tangent = normalize(cross(up,N));”
“vec3 bitangent = cross(N,tangent);”
“vec3 sampleVec = tangent * H.x + bitangent * H.y + N * H.z;”
“return normalize(sampleVec);”
“}”
"void main() "
"{ "
" vec3 N = normalize(localPos); "
" vec3 R = N; "
" vec3 V = R; "
" "
" const uint SAMPLE_COUNT = 1024u; "
" float totalWeight = 0.0; "
" vec3 prefilteredColor = vec3(0.0); "
" for (uint i = 0u; i < SAMPLE_COUNT; ++i) "
" { "
" vec2 Xi = HammersleyNoBitOps(i, SAMPLE_COUNT); "
" vec3 H = ImportanceSampleGGX(Xi, N, roughness); "
" vec3 L = normalize(2.0 * dot(V, H) * H - V); "
" "
" float NdotL = max(dot(N, L), 0.0); "
" if (NdotL > 0.0) "
" { "
" prefilteredColor += texture(environmentMap, L).rgb * NdotL; "
" totalWeight += NdotL; "
" } "
" } "
" prefilteredColor = prefilteredColor / totalWeight; "
" "
" gl_FragColor = vec4(prefilteredColor, 1.0); "
"} "
};
class MyNodeVisitor : public osg::NodeVisitor
{
public:
MyNodeVisitor() : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
{

}
void apply(osg::Geode& geode)
{int count = geode.getNumDrawables();for (int i = 0; i < count; i++){osg::ref_ptr<osg::Geometry> geometry = geode.getDrawable(i)->asGeometry();if (!geometry.valid()){continue;}osg::Array* vertexArray = geometry->getVertexArray();geometry->setVertexAttribArray(1, vertexArray);}traverse(geode);
}

};

osg::ref_ptrosg::TextureCubeMap getTextureCubeMap(osgViewer::Viewer& viewer,
int textureWidth,
int textureHeight)
{
unsigned int screenWidth, screenHeight;
osg::GraphicsContext::WindowingSystemInterface * wsInterface = osg::GraphicsContext::getWindowingSystemInterface();
wsInterface->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), screenWidth, screenHeight);

osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = screenWidth;
traits->height = screenHeight;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->readDISPLAY();
traits->setUndefinedScreenDetailsToDefaultScreen();osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (!gc)
{osg::notify(osg::NOTICE) << "GraphicsWindow has not been created successfully." << std::endl;return NULL;
}osg::ref_ptr<osg::TextureCubeMap> texture = new osg::TextureCubeMap;texture->setTextureSize(textureWidth, textureHeight);
texture->setInternalFormat(GL_RGB);
texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);osg::Camera::RenderTargetImplementation renderTargetImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
// front face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setName("Front face camera");camera->setGraphicsContext(gc.get());camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Y);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(0, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd());
}// top face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setName("Top face camera");camera->setGraphicsContext(gc.get());camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_Z);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(1, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 1.0, 0.0, 0.0));
}// left face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setName("Left face camera");camera->setGraphicsContext(gc.get());camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_X);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(2, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0, 1.0, 0.0) * osg::Matrixd::rotate(osg::inDegrees(-90.0f), 0.0, 0.0, 1.0));
}// right face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setName("Right face camera");camera->setGraphicsContext(gc.get());camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::POSITIVE_X);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(3, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0, 1.0, 0.0) * osg::Matrixd::rotate(osg::inDegrees(90.0f), 0.0, 0.0, 1.0));}// bottom face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setGraphicsContext(gc.get());camera->setName("Bottom face camera");camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Z);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(4, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(90.0f), 1.0, 0.0, 0.0) * osg::Matrixd::rotate(osg::inDegrees(180.0f), 0.0, 0.0, 1.0));}// back face
{osg::ref_ptr<osg::Camera> camera = new osg::Camera;camera->setName("Back face camera");camera->setGraphicsContext(gc.get());camera->setViewport(new osg::Viewport(0, 0, textureWidth, textureHeight));camera->setAllowEventFocus(false);camera->setRenderTargetImplementation(renderTargetImplementation);camera->setRenderOrder(osg::Camera::PRE_RENDER);//关联采样贴图camera->attach(osg::Camera::COLOR_BUFFER, texture, 0, osg::TextureCubeMap::NEGATIVE_Y);osg::ref_ptr<osg::Image> printImage = new osg::Image;printImage->setFileName(camera->getName());printImage->allocateImage(textureWidth, textureHeight, 1, GL_RGBA, GL_UNSIGNED_BYTE);texture->setImage(5, printImage);camera->attach(osg::Camera::COLOR_BUFFER, printImage);viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::rotate(osg::inDegrees(180.0f), 1.0, 0.0, 0.0));}viewer.getCamera()->setProjectionMatrixAsPerspective(90.0f, 1.0, 0.1, 10);//viewer.getCamera()->setNearFarRatio(0.0001f);
return texture;

}

int main()
{
int level = 0; //0,1,2,3,4
int maxLevel = 4;
float roughness = level * 1.0 / maxLevel;

int textureWidth = 128;
int textureHeight = 128;
float ratio = std::pow(0.5, level);
int mipWidth = textureWidth * ratio;
int mipHeight = textureHeight * ratio;
std::string strDir = "e:/hdr/lod/" + std::to_string(level) + "/";osg::ref_ptr<osg::TextureCubeMap> tcm = new osg::TextureCubeMap;
tcm->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
tcm->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
tcm->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
tcm->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
tcm->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP_TO_EDGE);std::string strImagePosX = strDir + "Right face camera.bmp";
osg::ref_ptr<osg::Image> imagePosX = osgDB::readImageFile(strImagePosX);
tcm->setImage(osg::TextureCubeMap::POSITIVE_X, imagePosX);
std::string strImageNegX = strDir + "Left face camera.bmp";
osg::ref_ptr<osg::Image> imageNegX = osgDB::readImageFile(strImageNegX);
tcm->setImage(osg::TextureCubeMap::NEGATIVE_X, imageNegX);std::string strImagePosY = strDir + "Front face camera.bmp";;
osg::ref_ptr<osg::Image> imagePosY = osgDB::readImageFile(strImagePosY);
tcm->setImage(osg::TextureCubeMap::POSITIVE_Y, imagePosY);
std::string strImageNegY = strDir + "Back face camera.bmp";;
osg::ref_ptr<osg::Image> imageNegY = osgDB::readImageFile(strImageNegY);
tcm->setImage(osg::TextureCubeMap::NEGATIVE_Y, imageNegY);std::string strImagePosZ = strDir + "Top face camera.bmp";
osg::ref_ptr<osg::Image> imagePosZ = osgDB::readImageFile(strImagePosZ);
tcm->setImage(osg::TextureCubeMap::POSITIVE_Z, imagePosZ);
std::string strImageNegZ = strDir + "Bottom face camera.bmp";
osg::ref_ptr<osg::Image> imageNegZ = osgDB::readImageFile(strImageNegZ);
tcm->setImage(osg::TextureCubeMap::NEGATIVE_Z, imageNegZ);osg::ref_ptr<osg::Box> box = new osg::Box(osg::Vec3(0, 0, 0), 1);
osg::ref_ptr<osg::ShapeDrawable> drawable = new osg::ShapeDrawable(box);
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
geode->addDrawable(drawable);
MyNodeVisitor nv;
geode->accept(nv);
osg::ref_ptr<osg::StateSet> stateset = geode->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0, tcm, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);//shaderosg::ref_ptr<osg::Shader> vs1 = new osg::Shader(osg::Shader::VERTEX, vertexShader);
osg::ref_ptr<osg::Shader> ps1 = new osg::Shader(osg::Shader::FRAGMENT, psShader);
osg::ref_ptr<osg::Program> program1 = new osg::Program;
program1->addShader(vs1);
program1->addShader(ps1);
program1->addBindAttribLocation("aPos", 1);osg::ref_ptr<osg::Uniform> tex0Uniform = new osg::Uniform("environmentMap", 0);
stateset->addUniform(tex0Uniform);
osg::ref_ptr<osg::Uniform> roughnessUniform = new osg::Uniform("roughness", roughness);
stateset->addUniform(roughnessUniform);
stateset->setAttribute(program1, osg::StateAttribute::ON);osgViewer::Viewer viewer;
osg::ref_ptr<osgGA::TrackballManipulator> manipulator = new osgGA::TrackballManipulator();
viewer.setCameraManipulator(manipulator);
osg::Vec3d newEye(0, 0, 0);
osg::Vec3 newCenter(0, 0, 0);
osg::Vec3 newUp(0, 1, 0);
manipulator->setHomePosition(newEye, newCenter, newUp);
osg::ref_ptr<osg::TextureCubeMap> textureCubeMap = getTextureCubeMap(viewer, mipWidth, mipHeight);
viewer.setSceneData(geode.get());bool bPrinted = false;
while (!viewer.done())
{viewer.frame();if (!bPrinted){bPrinted = true;int imageNumber = textureCubeMap->getNumImages();for (int i = 0; i < imageNumber; i++){osg::ref_ptr<osg::Image> theImage = textureCubeMap->getImage(i);std::string strPrintName = "e:/hdr/Prefilter/" + std::to_string(level) + "/" + theImage->getFileName() + ".bmp";osgDB::writeImageFile(*theImage, strPrintName);}}
}
return 0;

}

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.mzph.cn/news/92056.shtml

如若内容造成侵权/违法违规/事实不符，请联系多彩编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

JUC——并发编程—第二部分

JUC——并发编程—第二部分

集合类不安全 list不安全 //报错 java.util.ConcurrentModificationException public class ListTest {public static void main(String[] args) {List<String> list new CopyOnWriteArrayList<>();//并发下Arrayist边读边写会不安全的/*** 解决方案&#xff1a…
阅读更多...
iPhone苹果手机复制粘贴内容提示弹窗如何取消关闭提醒？

iPhone苹果手机复制粘贴内容提示弹窗如何取消关闭提醒？

经常使用草柴APP查询淘宝、天猫、京东商品优惠券拿购物返利的iPhone苹果手机用户&#xff0c;复制商品链接后打开草柴APP粘贴商品链接查券时总是弹窗提示粘贴内容&#xff0c;为此很多苹果iPhone手机用户联系客服询问如何关闭iPhone苹果手机复制粘贴内容弹窗提醒功能的方法如下…
阅读更多...
Java-API简析_java.util.Objects类（基于 Latest JDK）（浅析源码）

Java-API简析_java.util.Objects类（基于 Latest JDK）（浅析源码）

【版权声明】未经博主同意&#xff0c;谢绝转载&#xff01;&#xff08;请尊重原创&#xff0c;博主保留追究权&#xff09; https://blog.csdn.net/m0_69908381/article/details/133463511 出自【进步*于辰的博客】 因为我发现目前&#xff0c;我对Java-API的学习意识比较薄弱…
阅读更多...
Linux Ubuntu配置Git的方法

Linux Ubuntu配置Git的方法

本文介绍在Linux操作系统的Ubuntu版本中&#xff0c;配置分布式开源版本控制系统Git&#xff0c;随后基于Git克隆GitHub中项目的代码的详细方法。 在之前的文章分布式版本控制系统Git的下载、安装与使用其复制GitHub项目代码的方法&#xff08;https://blog.csdn.net/zhebushib…
阅读更多...
【前段基础入门之】=＞你不知道的 CSS 选择器的进阶使用！

【前段基础入门之】=＞你不知道的 CSS 选择器的进阶使用！

导语&#xff1a; 在上一章节中&#xff0c;我们了解了 CSS 的一些基本语法概念&#xff0c;那么在这一章节中我们就带来 CSS 选择器知识的分享&#xff0c;选择器这一章的知识点有一点多&#xff0c;不过我们只要认真去理解&#xff0c;学习它也是没什么问题的&#xff0c;还有…
阅读更多...
【模型压缩】Distiller学习-初认识

【模型压缩】Distiller学习-初认识

Distiller学习-初认识 简介 Intel AILab的神经网络压缩框架&#xff0c;建立在Pytorch基础上 安装 压缩方法 权重正则化方法权重剪枝方法训练后量化方法训练时量化方法条件计算低质分解方法知识蒸馏方法 总体目录 核心代码实现 所有案例的配置文件 举例 初始化网络评价网络…
阅读更多...
基于Vue和Element UI实现前后端分离和交互

基于Vue和Element UI实现前后端分离和交互

目录 前言 一、Element UI简介 1.Element UI是什么 2.Element UI的特点 二、项目搭建 1.创建一个SPA项目 2.安装 Element-UI 3.导入组件 4.创建登陆注册界面 登录组件---Login.vue 注册组件---Register.vue 定义组件与路由的对应关系 效果演示&#xff1a; 三、前…
阅读更多...
1.4.C++项目：仿muduo库实现并发服务器之buffer模块的设计

1.4.C++项目：仿muduo库实现并发服务器之buffer模块的设计

项目完整版在&#xff1a; 一、buffer模块&#xff1a; 缓冲区模块 Buffer模块是一个缓冲区模块&#xff0c;用于实现通信中用户态的接收缓冲区和发送缓冲区功能。 二、提供的功能 存储数据&#xff0c;取出数据 三、实现思想 1.实现换出去得有一块内存空间&#xff0c;采…
阅读更多...
Redis与分布式-集群搭建

Redis与分布式-集群搭建

接上文 Redis与分布式-哨兵模式 1. 集群搭建 搭建简单的redis集群&#xff0c;创建6个配置&#xff0c;开启集群模式&#xff0c;将之前配置过的redis删除&#xff0c;重新复制6份 针对主节点redis 1&#xff0c;redis 2&#xff0c;redis 3都是以上修改内容&#xff0c;只是…
阅读更多...
十、空闲任务及其钩子函数

十、空闲任务及其钩子函数

1、空闲任务的介绍 (1)一个良好的程序&#xff0c;它的任务都是事件驱动的&#xff1a;平时大部分时间处于阻塞状态。 (2)有可能我们自己创建的所有任务都无法执行&#xff0c;但是调度器必须能找到一个可以运行的任务。所以&#xff0c;我们要提供空闲任务。 (3)在使用vTas…
阅读更多...
格拉姆角场GAF将时序数据转换为图像并应用于凯斯西楚大学轴承故障诊断（Python代码，CNN模型）

格拉姆角场GAF将时序数据转换为图像并应用于凯斯西楚大学轴承故障诊断（Python代码，CNN模型）

1.运行效果&#xff1a; 格拉姆角场GAF将时序数据转换为图像并应用于故障诊断&#xff08;Python代码&#xff09;_哔哩哔哩_bilibili 环境库 只要tensorflow版本大于等于2.4.0即可运行 2.GAF的内容 GAF是一种用于时间序列数据可视化和特征提取的技术&#xff0c;通常用于…
阅读更多...
Linux——补充点（进程切换及页表映射）

Linux——补充点（进程切换及页表映射）

目录 补充点1&#xff1a;进程地址空间堆区管理 补充点2&#xff1a;Linux内核进程上下文切换 补充点3&#xff1a;页表映射 补充点4&#xff1a;两级页表 补充点1&#xff1a;进程地址空间堆区管理 Linux内核通过一个被称为进程描述符的task_struct结构体来管理进程&#…
阅读更多...
keil调试的时候没问题，下载时候没反应

keil调试的时候没问题，下载时候没反应

今天遇到这样一个问题。我下载商家的代码例程后单片机没反应&#xff0c;进入调试的时候一切正常。很奇怪&#xff0c;在网上找了教程问题解决&#xff0c;总结一下。 原因在于程序下载进去后没有按下复位键&#xff0c;导致还是之前的程序。我之前设置的是下载后自动复位运行…
阅读更多...
【STL】用一棵红黑树封装map和set

【STL】用一棵红黑树封装map和set

⭐博客主页&#xff1a;️CS semi主页 ⭐欢迎关注&#xff1a;点赞收藏留言 ⭐系列专栏&#xff1a;C进阶 ⭐代码仓库&#xff1a;C进阶 家人们更新不易&#xff0c;你们的点赞和关注对我而言十分重要&#xff0c;友友们麻烦多多点赞&#xff0b;关注&#xff0c;你们的支持是我…
阅读更多...
玩转gpgpu-sim 04记—— __cudaRegisterBinary() of gpgpu-sim 到底做了什么

玩转gpgpu-sim 04记—— __cudaRegisterBinary() of gpgpu-sim 到底做了什么

官方文档&#xff1a; GPGPU-Sim 3.x Manual __cudaRegisterBinary(void*) 被执行到的代码逻辑如下&#xff1a; void** CUDARTAPI __cudaRegisterFatBinary( void *fatCubin ) { #if (CUDART_VERSION < 2010)printf("GPGPU-Sim PTX: ERROR ** this version of GPGPU…
阅读更多...
小程序如何设置余额充值

小程序如何设置余额充值

在小程序中设置余额充值是一种非常有效的方式&#xff0c;可以帮助商家吸引更多的会员并提高用户的消费频率。下面将介绍如何在小程序中设置余额充值并使用。 第一步&#xff1a;创建充值方案 在小程序管理员后台->营销管理->余额充值页面&#xff0c;添加充值方案。可…
阅读更多...
Spark性能监测+集群配置

Spark性能监测+集群配置

spark-dashboard 参考链接 架构图 Spark官网中提供了一系列的接口可以查看任务运行时的各种指标 运行 卸载docker https://blog.csdn.net/wangerrong/article/details/126750198 sudo yum remove docker \docker-client \docker-client-latest \docker-common \docker-latest…
阅读更多...
Linux系统编程（七）：线程同步

Linux系统编程（七）：线程同步

参考引用 UNIX 环境高级编程 (第3版)黑马程序员-Linux 系统编程 1. 同步概念 所谓同步&#xff0c;即同时起步、协调一致。不同的对象&#xff0c;对 “同步” 的理解方式略有不同 设备同步&#xff0c;是指在两个设备之间规定一个共同的时间参考数据库同步&#xff0c;是指让…
阅读更多...
小白继续深入学习C++

小白继续深入学习C++

第1节 指针的基本概念 1、变量的地址&#xff1a; 变量是内存地址的简称&#xff0c;在C中&#xff0c;每定义一个变量&#xff0c;系统就会给变量分配一块内存&#xff0c;内存是有地址的。 C用运算符&获取变量在内存中的起始地址。 语法&#xff1a; &变…
阅读更多...
零基础Linux_9(进程)环境变量+进程地址空间+进程创建fork

零基础Linux_9(进程)环境变量+进程地址空间+进程创建fork

目录 1. 环境变量 1.1 环境变量基本概念 1.2 环境变量PATH 1.3 环境变量HOME和SHELL 1.4 获取环境变量&#xff08;main函数参数&#xff09; 1.4.1 main函数第三个参数 1.4.2 设置普通变量和环境变量 1.4.3 main函数前两个参数 2. 进程地址空间 2.1 验证进程地址空…
阅读更多...
推荐文章
最新文章

Copyright @ 2022~2023