daily update

basic-lighting/myshader.hh

@@ -0,0 +1,109 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <string.h>
+
+#include <fstream>
+#include <glm/glm.hpp>
+#include <iostream>
+#include <iterator>
+#include <sstream>
+class Shader {
+   public:
+    // 程序ID
+    unsigned int ID;
+    // 构造器读取并构建着色器
+    Shader(const char* vertexPath, const char* fragmentPath) {
+        std::string vertexCode;
+        std::string fragmentCode;
+        std::ifstream vShaderFile;
+        std::ifstream fShaderFile;
+
+        vShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+        fShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+
+        try {
+            vShaderFile.open(vertexPath);
+            fShaderFile.open(fragmentPath);
+            std::stringstream vShaderStream, fShaderStream;
+            vShaderStream << vShaderFile.rdbuf();
+            fShaderStream << fShaderFile.rdbuf();
+            vShaderFile.close();
+            fShaderFile.close();
+            vertexCode = vShaderStream.str();
+            fragmentCode = fShaderStream.str();
+        } catch (std::ifstream::failure e) {
+            std::cout << "Error::SHADER::FILE_NOT_SUCCESFULLY_READ"
+                      << std::endl;
+            std::cout << "=====Error Path=====" << std::endl
+                      << vertexPath << std::endl
+                      << fragmentPath << std::endl;
+        }
+
+        const char* vShaderCode = vertexCode.c_str();
+        const char* fShaderCode = fragmentCode.c_str();
+
+        // 编译着色器
+        unsigned int vertex, fragment;
+        int success;
+        char infoLog[512];
+
+        // 顶点着色器
+        vertex = glCreateShader(GL_VERTEX_SHADER);
+        glShaderSource(vertex, 1, &vShaderCode, NULL);
+        glCompileShader(vertex);
+        glGetShaderiv(vertex, GL_COMPILE_STATUS, &success);
+        if (!success) {
+            glGetShaderInfoLog(vertex, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n"
+                      << infoLog << std::endl;
+        }
+
+        // 片段着色器
+        fragment = glCreateShader(GL_FRAGMENT_SHADER);
+        glShaderSource(fragment, 1, &fShaderCode, NULL);
+        glCompileShader(fragment);
+        glGetShaderiv(fragment, GL_COMPILE_STATUS, &success);
+        if (!success) {
+            glGetShaderInfoLog(fragment, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n"
+                      << infoLog << std::endl;
+        }
+
+        ID = glCreateProgram();
+        glAttachShader(ID, vertex);
+        glAttachShader(ID, fragment);
+        glLinkProgram(ID);
+        glGetProgramiv(ID, GL_LINK_STATUS, &success);
+        if (!success) {
+            glGetShaderInfoLog(ID, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::PROGRAM::LINKING_FAILED\n"
+                      << infoLog << std::endl;
+        }
+
+        glDeleteShader(vertex);
+        glDeleteShader(fragment);
+    }
+    // 使用/激活程序
+    void use() { glUseProgram(ID); }
+    // uniform工具函数
+    void setBool(const std::string& name, bool value) const {
+        glUniform1i(glGetUniformLocation(ID, name.c_str()), (int)value);
+    }
+    void setInt(const std::string& name, int value) const {
+        glUniform1i(glGetUniformLocation(ID, name.c_str()), value);
+    }
+    void setFloat(const std::string& name, float value) const {
+        glUniform1f(glGetUniformLocation(ID, name.c_str()), value);
+    }
+    void setMat4(const std::string& name, glm::mat4 m) {
+        glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE,
+                           &m[0][0]);
+    }
+    void setVec3(const std::string& name, float x, float y, float z) {
+        glUniform3f(glGetUniformLocation(ID, name.c_str()), x, y, z);
+    }
+    void setVec3(const std::string& name, const glm::vec3 v) {
+        glUniform3fv(glGetUniformLocation(ID, name.c_str()), 1, &v[0]);
+    }
+};