OpenGL我的纹理显示为单色？

Question

OpenGL我的纹理显示为单色。尝试不同的纹理只能从纹理中单独出来。如果纹理多数为绿色，则输出为绿色。

我的纹理类

Texture::Texture(const std::string& FilePath)
    {
        this->RenderID = 0;
        this->FilePath = FilePath;
        this->localBuffer = nullptr;
        this->width = 0;
        this->height = 0;
        this->BPP = 0;

        stbi_set_flip_vertically_on_load(1);
        localBuffer = stbi_load(this->FilePath.c_str(), &width, &height, &BPP, 4);

        glGenTextures(1, &RenderID);
        glBindTexture(GL_TEXTURE_2D, RenderID);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);


        if (localBuffer)
        {
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, localBuffer);
            glGenerateMipmap(GL_TEXTURE_2D);
        }

        else
        {
            std::cout << "error damn it";
        }

        unbind();

        stbi_image_free(localBuffer);
    }

我的主循环

while (!window.isClosed())
{
    window.clear();
    render.Draw(vao, ibo, shade);
    texture.bind();
    shade.setUniform1i("u_texture", 0);
    window.update();
}

片段着色器：

#version 330 core
layout(location = 0) out vec4 FragColor;

in vec2 tex_out;

uniform sampler2D u_texture;
void main()
{
    vec4 tex = texture(u_texture , tex_out);
    FragColor = tex;
 }

使用的纹理：

输出：