exercise，add another material

Author: bYsdTd

include/renderer.h

@@ -28,7 +28,9 @@ class Renderer
 
     GLuint vertex_shader;
     GLuint fragment_shader;
+    GLuint fragment_shader2;
     GLuint program;
+    GLuint program2;
 };
 
 Renderer::Renderer()
@@ -99,6 +101,14 @@ void Renderer::init()
     "    FragColor = vec4(0.5, 0.5, 0.5, 1.0);\n"
     "}\n";
 
+    const char* fragment_shader_text2 =
+            "#version 330 core\n"
+            "out vec4 FragColor;"
+            "void main()\n"
+            "{\n"
+            "    FragColor = vec4(1, 0.5, 0.5, 1.0);\n"
+            "}\n";
+
     vertex_shader = glCreateShader(GL_VERTEX_SHADER);
     glShaderSource(vertex_shader, 1, &vertex_shader_text, NULL);
     glCompileShader(vertex_shader);
@@ -131,15 +141,38 @@ void Renderer::init()
         std::cout << "ERROR::SHADER::LINK_PROJGRAM_FAILED\n" << infoLog << std::endl;
     }
 
+    // 第二份材质
+    fragment_shader2 = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragment_shader2, 1, &fragment_shader_text2, NULL);
+    glCompileShader(fragment_shader2);
+    glGetShaderiv(fragment_shader2, GL_COMPILE_STATUS, &success);
+    if(!success)
+    {
+        glGetShaderInfoLog(fragment_shader2, 512, NULL, infoLog);
+        std::cout << "ERROR::SHADER::FRAGMENT2::COMPILATION_FAILED\n" << infoLog << std::endl;
+    }
+
+    program2 = glCreateProgram();
+    glAttachShader(program2, vertex_shader);
+    glAttachShader(program2, fragment_shader2);
+    glLinkProgram(program2);
+    glGetProgramiv(program2, GL_LINK_STATUS, &success);
+    if(!success) {
+        glGetProgramInfoLog(program2, 512, NULL, infoLog);
+        std::cout << "ERROR::SHADER::LINK_PROJGRAM2_FAILED\n" << infoLog << std::endl;
+    }
+
     glDeleteShader(vertex_shader);
     glDeleteShader(fragment_shader);
+    glDeleteShader(fragment_shader2);
 }
 
 void Renderer::render()
 {
     glUseProgram(program);
     glBindVertexArray(VAO);
     glDrawArrays(GL_TRIANGLES, 0, 3);
+    glUseProgram(program2);
     glBindVertexArray(VAO2);
     glDrawArrays(GL_TRIANGLES, 0, 3);
 

main.cpp

@@ -63,7 +63,7 @@ int main(void)
     renderer->init();
 
     // uncomment this call to draw in wireframe polygons.
-    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+//    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
 
     /* Loop until the user closes the window */
     while (!glfwWindowShouldClose(window))