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);
}