是否可以使用带有立方贴图颜色附件的深度渲染缓冲区？

debugcn 发表于 Dev

斯凯尔兹

我正在尝试创建一个帧缓冲区，并使用GL_TEXTURE_CUBE_MAP作为颜色附件，并将GL_DEPTH24_STENCIL8作为深度缓冲区用于帧缓冲区的渲染缓冲区。

我坚信这会奏效，就像对带有GL_TEXTURE_2D颜色附件的帧缓冲区和以GL_DEPTH24_STENCIL8作为深度组件的渲染缓冲区一样。但是，它对于GL_TEXTURE_CUBE_MAP颜色附件似乎不起作用，因为我收到了Framebuffer Incomplete错误。另外，请注意，我正在尝试一次创建多个Framebuffer。

glGenFramebuffers(5, &FBO[0]);
glGenTextures(5, &FBO_texture[0]);
glGenRenderbuffers(5, &FBO_Renderbuffer[0]);

for (unsigned int i = 0; i < 5; i++)
{
    glBindTexture(GL_TEXTURE_CUBE_MAP, FBO_texture[i]);
    for (unsigned int j = 0; j < 6; j++)
    {
        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + j, 0, GL_R16F, shadow_map_width, shadow_map_height, 0, GL_RED, GL_FLOAT, NULL);
    }

    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

    glBindFramebuffer(GL_FRAMEBUFFER, FBO[i]);

    glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBO_texture[i], 0);

    glBindRenderbuffer(GL_RENDERBUFFER, FBO_Renderbuffer[i]);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, shadow_map_width, shadow_map_height);

    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, FBO_Renderbuffer[i]);

    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
        LOGGER->log(ERROR, "Renderer :  createFrameBuffers ", "Framebuffer is incomplete!");

    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glBindRenderbuffer(GL_RENDERBUFFER, 0);
}

我不明白为什么会收到Framebuffer不完整的错误。我在这里想念什么吗？

拉比德76

没有。

您必须GL_TEXTURE_CUBE_MAP使用GL_DEPTH24_STENCIL8深度缓冲区附件的格式创建一个纹理。例如：

glGenFramebuffers(5, &FBO[0]);
glGenTextures(5, &FBO_texture[0]);
glGenTextures(5, &FBO_depth_texture[0]);

for (unsigned int i = 0; i < 5; i++)
{
    glBindTexture(GL_TEXTURE_CUBE_MAP, FBO_texture[i]);
    for (unsigned int j = 0; j < 6; j++)
    {
        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + j, 0, GL_R16F, shadow_map_width, shadow_map_height, 0, GL_RED, GL_FLOAT, NULL);
    }
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

    glBindTexture(GL_TEXTURE_CUBE_MAP, FBO_depth_texture[i]);
    for (unsigned int j = 0; j < 6; j++)
    {
        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + j, 0, GL_DEPTH24_STENCIL8, shadow_map_width, shadow_map_height, 0, GL_DEPTH_STENCIL, GL_FLOAT, NULL);
    }
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

    glBindFramebuffer(GL_FRAMEBUFFER, FBO[i]);
    glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBO_texture[i], 0);
    glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, FBO_depth_texture[i], 0);

    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
        LOGGER->log(ERROR, "Renderer :  createFrameBuffers ", "Framebuffer is incomplete!");

    glBindFramebuffer(GL_FRAMEBUFFER, 0);
}

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