OPENGL如何使用glTexImage3D函数

下面的代码用于绘制海洋，我试图将其转换为c#代码，但我失败了，因为我不理解3d函数做什么，所以我想对这些函数(我的意思是3d纹理)进行一些解释…

int res = 64;
int nr = res / 2;
int nv = res * 2;
int nb = res / 2;
int na = 8;
f = fopen("E:''New folder''ConsoleApplication1''Debug''data''inscatter.raw", "rb");
data = new float[nr*nv*nb*na*4];
fread(data, 1, nr*nv*nb*na*4*sizeof(float), f);
fclose(f);
glActiveTexture(GL_TEXTURE0 + INSCATTER_UNIT);
glGenTextures(1, &inscatterTex);
glBindTexture(GL_TEXTURE_3D, inscatterTex);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA16F_ARB, na*nb, nv, nr, 0, GL_RGBA, GL_FLOAT, data);
delete[] data;