glGenTextures(1, &CubeMapID);
glBindTexture(GL_TEXTURE_CUBE_MAP, CubeMapID);

glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);

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);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

#version 330 core
layout(location=0) in vec3 aPos;out vec3 TexCoords;uniform mat4 projection;
uniform mat4 view;void main()
{TexCoords=aPos;gl_Position = projection * view * vec4(aPos, 1.0);
}

#version 330 core
out vec4 FragColor;
in vec3 TexCoords;
uniform samplerCube skyBox;
void main()
{FragColor=texture(skyBox,TexCoords);
}

int main()
{glDepthMask(GL_FALSE);
//绘制天空盒
//...
glDepthMask(GL_TRUE);
//绘制其他物体
}

view=glm::mat4(glm::mat3(view))

#version 330 core
layout(location=0) in vec3 aPos;out vec3 TexCoords;uniform mat4 projection;
uniform mat4 view;void main()
{TexCoords=aPos;vec4 pos = projection * view * vec4(aPos, 1.0);gl_Position = pos.xyww;
}

glDepthFunc(GL_LEQUAL);
//绘制天空盒
glDepthFunc(GL_LESS);

#version 330 core
layout (location=0) in vec3 aPos;
layout (location=1) in vec3 aNormal;out vec3 fragPos;
out vec3 Normal;uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;void main()
{  Normal=mat3(transpose(inverse(view*model)))*aNormal;fragPos=vec3(view*model*vec4(aPos,1.0));gl_Position=projection*view*model*vec4(aPos,1.0);
}

#version 330 core
out vec4 FragColor; in vec3 Normal;
in vec3 fragPos;uniform samplerCube skybox;void main()
{ //环境映射反射vec3 I=normalize(fragPos);vec3 R=reflect(I,normal);FragColor=vec4(texture(skybox,R).xyz,1.0);
}

struct Material
{sampler2D texture_diffuse0;sampler2D texture_specular0;sampler2D texture_normal0;sampler2D texture_reflection0;float shininess;//影响镜面高光的散射/半径
};

float reflectRate=(texture(material.texture_reflection0,TexCoords).r+texture(material.texture_reflection0,TexCoords).g+texture(material.texture_reflection0,TexCoords).b)/3;

   float reflectRate=texture(material.texture_reflection0,TexCoords).r;

void main()
{ vec3 normal=normalize(Normal);vec3 viewDir=normalize(-fragPos);//观察空间下进行vec3 Direction=CalcDirectionalLight(dirLight,normal,viewDir);vec3 Point = CalcPointLight(pointLight,normal,fragPos,viewDir);vec3 Spot=CalcSpotLight(spotLight,normal,fragPos,viewDir);//环境映射反射vec3 I=normalize(fragPos);vec3 R=reflect(I,normal);float reflectRate=texture(material.texture_reflection0,TexCoords).r;vec4 reflection=texture(skybox,R);FragColor=vec4(reflectRate*reflection.xyz+(1-reflectRate)*(Spot+Point+Direction),1.0);
}

float ratio=1.0/1.33;
vec3 I=normalize(fragPos);
vec3 R=refract(I,normal,ratio);FragColor=vec4(texture(skybox,R).xyz,1.0);

vec3 refract(vec3 I,vec3 normal,float ratio)
{vec3 OC=dot(-I,normal)*normal;vec3 CA=-I-OC;vec3 EB=-ratio*CA;float EB_length_2=EB.x*EB.x+EB.y*EB.y+EB.z+EB.z;vec3 OE=-sqrt(1-EB_length_2)*normal;return EB+OE;
}