Question

我正在尝试在一个立方体对象上实现环境+漫射照明。我有2个多维数据集（光源和多维数据集对象）。我的环境光正常工作，但是当我添加漫反射时，立方体对象停止一起显示。这是我的代码（部分省略了长度）：

着色器：

const char* vertex_shader =
"#version 150\n"
"in vec3 vp;"
"in vec3 aNormal;"
"out vec3 normal;"
"out vec3 fragPos;"
"uniform mat4 model;"
"uniform mat4 view;"
"uniform mat4 projection;"
"void main() {"
"  fragPos = vec3(model * vec4(vp, 1.0));"
"  normal = aNormal;"
"  gl_Position = projection * view * model * vec4(vp, 1.0);"
"}";
const char* fragment_shader =
"#version 150\n"
"out vec4 frag_colour;"
"in vec3 normal;"
"in vec3 fragPos;"
"uniform vec3 objColor;"
"uniform vec3 lightColor;"
"uniform vec3 lightPos;"
"void main() {"
"  //diffuse"
"  vec3 norm = normalize(normal);"
"  vec3 lightDir = normalize(lightPos - fragPos);"
"  float diff = max(dot(norm, lightDir), 0.0);"
"  vec3 diffuse = diff * lightColor;"
"  //ambient"
"  float ambientVal = 0.1;"
"  vec3 ambient = ambientVal * lightColor;"
"  vec3 result = (ambient + diffuse) * objColor;"
"  frag_colour = vec4(1.0,1.0,1.0, 1.0);"
"}";

主要功能：

int main() {
    /... setup
    /////////////////////////////////////////////////

    float points[] = {
        /... position and normal vectors
    };
    //cube
    GLuint vbo = 0;//
    glGenBuffers(1, &vbo); //
    glBindBuffer(GL_ARRAY_BUFFER, vbo);//
    glBufferData(GL_ARRAY_BUFFER, sizeof(points), points, GL_STATIC_DRAW);//

    //vao for cube object
    GLuint vao = 0;//
    glGenVertexArrays(1, &vao); //
    glBindVertexArray(vao); //
    glEnableVertexAttribArray(0); // position vectors
    glBindBuffer(GL_ARRAY_BUFFER, vbo);//
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), NULL);//

    glEnableVertexAttribArray(1); // normal vectors
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));


    //vao for light
    /... drawing light source

    //starting loop
    while(!glfwWindowShouldClose(window)) {
        // wipe the drawing surface clear
        glClearColor(0.1f,0.1f,0.1f,1.0f);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        //activate OBJECT shader and set values
        glUseProgram(shader_program);
        glUniform3f(glGetUniformLocation(shader_program, "objColor"), 1.0f, 0.5f, 0.31f);
        glUniform3f(glGetUniformLocation(shader_program, "lightColor"), 1.0f, 1.0f, 1.0f);

        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)WIDTH / (float)HEIGHT, 0.1f, 100.0f);
        glm::mat4 view = camera.GetViewMatrix();

        glUniformMatrix4fv(glGetUniformLocation(shader_program,"projection"), 1, GL_FALSE, &projection[0][0]);
        glUniformMatrix4fv(glGetUniformLocation(shader_program,"view"), 1, GL_FALSE, &view[0][0]);
        glm::mat4 model = glm::mat4(1.0f);
        glUniformMatrix4fv(glGetUniformLocation(shader_program,"model"), 1, GL_FALSE, &model[0][0]);

        //glUniform3f(glGetUniformLocation(shader_program, "lightPos"), lightPos.x, lightPos.y, lightPos.z);
        glUniform3fv(glGetUniformLocation(shader_program, "lightPos"), 1, &lightPos[0]);

        glBindVertexArray(vao);
        glDrawArrays(GL_TRIANGLES, 0, 36); // draw w/ current in-use shader


        //activate LIGHT SOURCE shader and set values
        /... same for light source


        // update other events like input handling
        glfwPollEvents();
        // put the stuff we've been drawing onto the display
        glfwSwapBuffers(window);
    }

    // close GL context and any other GLFW resources
    glfwTerminate();
    return 0;
}

我相信这是因为多维数据集对象着色器未编译，但我不确定。任何帮助将不胜感激！

实施漫反射+环境照明，多维数据集对象未显示OpenGL

0 个答案: