D3D10常量缓冲区不工作 [英] D3D10 Constant buffer not working

问题描述

我使用常量缓冲区将数据传输到像素着色器

问题是缓冲区在运行时在着色器中包含x，x，y，z ，并且不管什么数据被更新到缓冲区，而是float4成员的w。

结构定义如下：

  //（C ++）
 struct Buffer 
 {
 XMMATRIX mvp_; 
 XMFLOAT4 rgba_; 
 int usemvp_; 
}; 
 
 
 // HLSL 
 cbuffer缓冲区：register（b0）
 {
 matrix mvp_; 
 float4 rgba_; 
 int usemvp_; 
}; 
  

任何帮助非常感谢

  //（C ++ ）
 struct缓冲区
 {
 XMMATRIX mvp_; 
 XMFLOAT4 rgba_; 
 int usemvp_; 
 float padding [3]; 
}; 
  

此外，还必须确保将常量缓冲区设置为正确的着色器阶段，即VSSetConstantBuffers vs PSSetConstantBuffers。

I am using a constant buffer to transfer data to my pixel shader

The problem is that the buffer contains 0s in the shader during runtime for x, y, z, and w of the float4 member, regardless of what data is updated to the buffer

Structure definitions are as follows:

// (C++)
struct Buffer
{
    XMMATRIX mvp_;
    XMFLOAT4 rgba_;
    int usemvp_;
};


// HLSL
cbuffer Buffer : register( b0 )
{
    matrix mvp_;
    float4 rgba_;
    int usemvp_;
};

Any help is much appreciated

解决方案

You need to pad your struct to make it 16 byte aligned.

// (C++)
struct Buffer
{
    XMMATRIX mvp_;
    XMFLOAT4 rgba_;
    int usemvp_;
    float padding[3];
};

Also you have to make sure that you are setting the constant buffer into the correct shader stage, ie VSSetConstantBuffers vs PSSetConstantBuffers.

这篇关于D3D10常量缓冲区不工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！