OpenGL 8th editon 4th chapter source code errdata

void ShadowMapExample::Initialize(const char * title)
{
    base::Initialize(title);

    // Create the program for rendering the scene from the light's POV.
    glCreateProgram();

    ShaderInfo light_shaders[] =
    {
        { GL_VERTEX_SHADER, "shadowmap_shadow.vs.glsl" },
        { GL_FRAGMENT_SHADER, "shadowmap_shadow.fs.glsl" },
        { GL_NONE }
    };

    render_light_prog = LoadShaders(light_shaders);

    // Get the location of the projetion_matrix uniform
    render_light_uniforms.model_view_projection_matrix = glGetUniformLocation(render_light_prog, "model_view_projection_matrix");

    // Create the program for rendering the scene from the viewer's position
    ShaderInfo scene_shaders[] =
    {
        { GL_VERTEX_SHADER, "shadowmap_scene.vs.glsl" },
        { GL_FRAGMENT_SHADER, "shadowmap_scene.fs.glsl" },
        { GL_NONE }
    };

    render_scene_prog = LoadShaders(scene_shaders);

    // Get the locations of all the uniforms in the program
    render_scene_uniforms.model_matrix = glGetUniformLocation(render_scene_prog, "model_matrix");
    render_scene_uniforms.view_matrix = glGetUniformLocation(render_scene_prog, "view_matrix");
    render_scene_uniforms.projection_matrix = glGetUniformLocation(render_scene_prog, "projection_matrix");
    render_scene_uniforms.shadow_matrix = glGetUniformLocation(render_scene_prog, "shadow_matrix");
    render_scene_uniforms.light_position = glGetUniformLocation(render_scene_prog, "light_position");
    render_scene_uniforms.material_ambient = glGetUniformLocation(render_scene_prog, "material_ambient");
    render_scene_uniforms.material_diffuse = glGetUniformLocation(render_scene_prog, "material_diffuse");
    render_scene_uniforms.material_specular = glGetUniformLocation(render_scene_prog, "material_specular");
    render_scene_uniforms.material_specular_power = glGetUniformLocation(render_scene_prog, "material_specular_power");

    // Set the depth texture uniform to unit 0
    glUseProgram(render_scene_prog);
    glUniform1i(glGetUniformLocation(render_scene_prog, "depth_texture"), 0);

    // Create a depth texture
    glGenTextures(1, &depth_texture);
    glBindTexture(GL_TEXTURE_2D, depth_texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32, DEPTH_TEXTURE_SIZE, DEPTH_TEXTURE_SIZE, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glBindTexture(GL_TEXTURE_2D, 0);

    // Create FBO to render depth into
    glGenFramebuffers(1, &depth_fbo);
    glBindFramebuffer(GL_FRAMEBUFFER, depth_fbo);
    glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, depth_texture, 0);
    glDrawBuffer(GL_NONE);

    glBindFramebuffer(GL_FRAMEBUFFER, 0);

    // Upload geometry for the ground plane
    static const float ground_vertices[] =
    {
        -500.0f, -50.0f, -500.0f, 1.0f,
        -500.0f, -50.0f,  500.0f, 1.0f,
         500.0f, -50.0f,  500.0f, 1.0f,
         500.0f, -50.0f, -500.0f, 1.0f,
    };

    static const float ground_normals[] =
    {
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f
    };

    glGenVertexArrays(1, &ground_vao);
    glGenBuffers(1, &ground_vbo);
    glBindVertexArray(ground_vao);
    glBindBuffer(GL_ARRAY_BUFFER, ground_vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(ground_vertices) + sizeof(ground_normals), NULL, GL_STATIC_DRAW);
    glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(ground_vertices), ground_vertices);
    glBufferSubData(GL_ARRAY_BUFFER, sizeof(ground_vertices), sizeof(ground_normals), ground_normals);

    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid *)sizeof(ground_vertices));
    glEnableVertexAttribArray(0);
    glEnableVertexAttribArray(1);

    // Load the object
    object.LoadFromVBM("C:/Vermilion-Book/trunk/Code/media/armadillo_low.vbm", 0, 1, 2);
}


校正为：


void ShadowMapExample::Initialize(const char * title)
{
    base::Initialize(title);

    // Create the program for rendering the scene from the light's POV.
    glCreateProgram();

    ShaderInfo light_shaders[] =
    {
        { GL_VERTEX_SHADER, "shadowmap_shadow.vs.glsl" },
        { GL_FRAGMENT_SHADER, "shadowmap_shadow.fs.glsl" },
        { GL_NONE }
    };

    render_light_prog = LoadShaders(light_shaders);

    // Get the location of the projetion_matrix uniform
    render_light_uniforms.model_view_projection_matrix = glGetUniformLocation(render_light_prog, "model_view_projection_matrix");

    // Create the program for rendering the scene from the viewer's position
    ShaderInfo scene_shaders[] =
    {
        { GL_VERTEX_SHADER, "shadowmap_scene.vs.glsl" },
        { GL_FRAGMENT_SHADER, "shadowmap_scene.fs.glsl" },
        { GL_NONE }
    };

    render_scene_prog = LoadShaders(scene_shaders);

    // Get the locations of all the uniforms in the program
    render_scene_uniforms.model_matrix = glGetUniformLocation(render_scene_prog, "model_matrix");
    render_scene_uniforms.view_matrix = glGetUniformLocation(render_scene_prog, "view_matrix");
    render_scene_uniforms.projection_matrix = glGetUniformLocation(render_scene_prog, "projection_matrix");
    render_scene_uniforms.shadow_matrix = glGetUniformLocation(render_scene_prog, "shadow_matrix");
    render_scene_uniforms.light_position = glGetUniformLocation(render_scene_prog, "light_position");
    render_scene_uniforms.material_ambient = glGetUniformLocation(render_scene_prog, "material_ambient");
    render_scene_uniforms.material_diffuse = glGetUniformLocation(render_scene_prog, "material_diffuse");
    render_scene_uniforms.material_specular = glGetUniformLocation(render_scene_prog, "material_specular");
    render_scene_uniforms.material_specular_power = glGetUniformLocation(render_scene_prog, "material_specular_power");

    // Set the depth texture uniform to unit 0
    glUseProgram(render_scene_prog);
    glUniform1i(glGetUniformLocation(render_scene_prog, "depth_texture"), 0);

    // Create a depth texture
    glGenTextures(1, &depth_texture);
    glBindTexture(GL_TEXTURE_2D, depth_texture);

    // glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32, DEPTH_TEXTURE_SIZE, DEPTH_TEXTURE_SIZE, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
	  glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH32F_STENCIL8, DEPTH_TEXTURE_SIZE, DEPTH_TEXTURE_SIZE, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glBindTexture(GL_TEXTURE_2D, 0);

    // Create FBO to render depth into
    glGenFramebuffers(1, &depth_fbo);
    glBindFramebuffer(GL_FRAMEBUFFER, depth_fbo);
    glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, depth_texture, 0);
    
    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
    
    glDrawBuffer(GL_NONE);

    glBindFramebuffer(GL_FRAMEBUFFER, 0);

    // Upload geometry for the ground plane
    static const float ground_vertices[] =
    {
        -500.0f, -50.0f, -500.0f, 1.0f,
        -500.0f, -50.0f,  500.0f, 1.0f,
         500.0f, -50.0f,  500.0f, 1.0f,
         500.0f, -50.0f, -500.0f, 1.0f,
    };

    static const float ground_normals[] =
    {
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 1.0f, 0.0f
    };

    glGenVertexArrays(1, &ground_vao);
    glGenBuffers(1, &ground_vbo);
    glBindVertexArray(ground_vao);
    glBindBuffer(GL_ARRAY_BUFFER, ground_vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(ground_vertices) + sizeof(ground_normals), NULL, GL_STATIC_DRAW);
    glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(ground_vertices), ground_vertices);
    glBufferSubData(GL_ARRAY_BUFFER, sizeof(ground_vertices), sizeof(ground_normals), ground_normals);

    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid *)sizeof(ground_vertices));
    glEnableVertexAttribArray(0);
    glEnableVertexAttribArray(1);

    // Load the object
    object.LoadFromVBM("C:/Vermilion-Book/trunk/Code/media/armadillo_low.vbm", 0, 1, 2);
}