C++ 一个粒子太多：生成GL\u无效\u值错误&书信电报；启动>；不满足着色器存储缓冲区的最低对齐要求

我的粒子系统有一个奇怪的错误。我可以动态设置缓冲区的大小，并且可以根据需要更改粒子的数量。我在玩30k、40k等数字，以及介于两者之间的所有数字。最大值为40800。。。然后我从输出终端的标题中得到错误

代码如下：

Log::logInfo(m_Name, "Bind particle buffers...");

    /// ssbo sizes
    constexpr ptrdiff_t positionSSBOsize = sizeof(glm::vec4) * NUM_PARTICLES;
    constexpr ptrdiff_t velocitySSBOsize = sizeof(glm::vec2) * NUM_PARTICLES;
    constexpr ptrdiff_t forceSSBOsize = sizeof(glm::vec2) * NUM_PARTICLES;
    constexpr ptrdiff_t densitySSBOsize = sizeof(float) * NUM_PARTICLES;
    constexpr ptrdiff_t pressureSSBOsize = sizeof(float) * NUM_PARTICLES;

    /// total size
    constexpr ptrdiff_t packedBufferSize = positionSSBOsize + velocitySSBOsize + forceSSBOsize + densitySSBOsize + pressureSSBOsize;

    /// ssbo offsets
    constexpr ptrdiff_t positionSSBOoffset = 0;
    constexpr ptrdiff_t velocitySSBOoffset = positionSSBOsize;
    constexpr ptrdiff_t forceSSBOoffset = velocitySSBOoffset + velocitySSBOsize;
    constexpr ptrdiff_t densitySSBOoffset = forceSSBOoffset + forceSSBOsize;
    constexpr ptrdiff_t pressureSSBOoffset = densitySSBOoffset + densitySSBOsize;

    /// set inital positions
    this->initParticleSeeds(packedBufferSize, positionSSBOsize, m_PackedParticlesBufferHandle);

    /// bind to inital positions data
    this->bindBufferToVertexArrayObject(m_ParticlePositionVaoHandle, m_PackedParticlesBufferHandle, PARTICLE_SEEDS_NR);

    /// bindings 
    //@TODO: Here we got a problem after increasing NUM_PARTICLES, the error that the MAX_SHADER_STORAGE_BUFFER_BINDINGS are reached, thats why INVALID_ERROR is thrown
    Log::logInfo(m_Name, "Bind particle buffers: positions");
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, SHADER_PART_POS_NR, m_PackedParticlesBufferHandle, positionSSBOoffset, positionSSBOsize);   /// Particle Positions
    Log::logInfo(m_Name, "Bind particle buffers: velocities");
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, SHADER_PART_VEL_NR, m_PackedParticlesBufferHandle, velocitySSBOoffset, velocitySSBOsize);   /// Particle Velocities
    Log::logInfo(m_Name, "Bind particle buffers: force");
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, SHADER_PART_FRC_NR, m_PackedParticlesBufferHandle, forceSSBOoffset, forceSSBOsize);         /// Particle Force
    Log::logInfo(m_Name, "Bind particle buffers: density");
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, SHADER_PART_DNS_NR, m_PackedParticlesBufferHandle, densitySSBOoffset, densitySSBOsize);     /// Particle Density
    Log::logInfo(m_Name, "Bind particle buffers: pressure");
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, SHADER_PART_PRS_NR, m_PackedParticlesBufferHandle, pressureSSBOoffset, pressureSSBOsize);   /// Particle Pressure

    Log::logInitSucc(m_Name, "particle buffers");

正如我所说，一切正常，除了在40801粒子时，以下错误显示在我的日志中，并且我的一些缓冲区不再加载：

[APPLICATION]::  Bind particle buffers...
[APPLICATION]::  Init particle seeds ...
[APPLICATION]::  Save data in buffer ...

[SOURCE_API]::   [TYPE_OTHER][131185] [SEVERITY_NOTIFICATION] Buffer detailed info: Buffer object 3 (bound to GL_SHADER_STORAGE_BUFFER, usage hint is GL_STATIC_DRAW) will use VIDEO memory as the source for buffer object operations.

[APPLICATION]::  Init particle seeds SUCCESS!
[APPLICATION]::  Bind vertex array object (VAO) to buffer ...
[APPLICATION]::  Init VAO SUCCESS!
[APPLICATION]::  Bind particle buffers: positions
[APPLICATION]::  Bind particle buffers: velocities

[SOURCE_API]::   [TYPE_ERROR][1281] [SEVERITY_HIGH] GL_INVALID_VALUE error generated. <start> does not meet minimum alignment requirements for shader storage buffers.

[APPLICATION]::  Bind particle buffers: force

[SOURCE_API]::   [TYPE_ERROR][1281] [SEVERITY_HIGH] GL_INVALID_VALUE error generated. <start> does not meet minimum alignment requirements for shader storage buffers.

[APPLICATION]::  Bind particle buffers: density
[APPLICATION]::  Bind particle buffers: pressure

[SOURCE_API]::   [TYPE_ERROR][1281] [SEVERITY_HIGH] GL_INVALID_VALUE error generated. <start> does not meet minimum alignment requirements for shader storage buffers.

[应用]：：绑定粒子缓冲区。。。
[应用]：：初始化粒子种子。。。
[应用程序]：：将数据保存在缓冲区中。。。
[SOURCE_API]：：[TYPE_OTHER][131185][SEVERITY_NOTIFICATION]缓冲区详细信息：缓冲区对象3（绑定到GL_SHADER_STORAGE_Buffer，使用提示为GL_STATIC_DRAW）将使用视频内存作为缓冲区对象操作的源。
[应用]：：初始化粒子种子成功！
[应用]：：将顶点数组对象（VAO）绑定到缓冲区。。。
[应用]：：初始化VAO成功！
[应用]：：绑定粒子缓冲区：位置
[应用]：：绑定粒子缓冲区：速度
[SOURCE_API]：[TYPE_ERROR][1281][SEVERITY_HIGH]生成GL_无效值错误。不满足着色器存储缓冲区的最低对齐要求。
[应用]：：绑定粒子缓冲区：强制
[SOURCE_API]：[TYPE_ERROR][1281][SEVERITY_HIGH]生成GL_无效值错误。不满足着色器存储缓冲区的最低对齐要求。
[应用]：：绑定粒子缓冲区：密度
[应用]：：绑定粒子缓冲区：压力
[SOURCE_API]：[TYPE_ERROR][1281][SEVERITY_HIGH]生成GL_无效值错误。不满足着色器存储缓冲区的最低对齐要求。

使用

glBindBufferRange

无法将任意偏移量写入缓冲区。偏移量必须是各个缓冲区偏移量对齐的倍数，这取决于所使用的缓冲区类型。此限制取决于平台，并由GPU上的底层内存体系结构施加

对于SSBO（此处使用），可使用以下代码查询相关路线：

glGetIntegeri_v(GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT, &alignment);

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更多细节可以在

Is

Velocitysbooffset

GL\u SHADER\u STORAGE\u BUFFER\u OFFSET\u ALIGNMENT的倍数中找到？老实说，我不知道。我在这里或互联网上找不到有关GL_着色器_存储_缓冲区_偏移_对齐的信息。如何确保它是多重的？GL\U着色器\U存储\U缓冲区\U偏移量\U对齐是可以查询的参数之一。原来GL\U着色器\U存储\U缓冲区\U偏移量\U对齐是32。设置od粒子数，并将velocitySSBOoffset设置为32的倍数，解决了此错误！非常感谢你！你能解释为什么会这样吗？我使用GLint64着色器存储缓冲区偏移对齐；glGetInteger64v（GL_着色器_存储_缓冲区_偏移量_对齐和着色器存储缓冲区偏移量对齐），格尔杰不为人知