Draw 2D texture with raylib in 3D space

DrawTexturePro3D.c

// Draws a texture in 3D space with pro parameters...
void DrawTexturePro3D(Texture2D texture, Rectangle sourceRec, Rectangle destRec, Vector3 origin, float rotation, float posZ, Color tint)
{
    // Check if texture is valid
    if (texture.id > 0)
    {
        float width = (float)texture.width;
        float height = (float)texture.height;
        
        bool flipX = false;

        if (sourceRec.width < 0) { flipX = true; sourceRec.width *= -1; }
        if (sourceRec.height < 0) sourceRec.y -= sourceRec.height;

        rlEnableTexture(texture.id);
        rlPushMatrix();
            rlTranslatef(destRec.x, destRec.y, 0.0f);
            rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
            rlTranslatef(-origin.x, -origin.y, -origin.z);

            rlBegin(RL_QUADS);
                rlColor4ub(tint.r, tint.g, tint.b, tint.a);
                rlNormal3f(0.0f, 0.0f, 1.0f);                          // Normal vector pointing towards viewer

                // Bottom-left corner for texture and quad
                if (flipX) rlTexCoord2f((sourceRec.x + sourceRec.width)/width, sourceRec.y/height);
                else rlTexCoord2f(sourceRec.x/width, sourceRec.y/height);
                rlVertex3f(0.0f, 0.0f, posZ);
                
                // Bottom-right corner for texture and quad
                if (flipX) rlTexCoord2f((sourceRec.x + sourceRec.width)/width, (sourceRec.y + sourceRec.height)/height);
                else rlTexCoord2f(sourceRec.x/width, (sourceRec.y + sourceRec.height)/height);
                rlVertex3f(0.0f, destRec.height, posZ);

                // Top-right corner for texture and quad
                if (flipX) rlTexCoord2f(sourceRec.x/width, (sourceRec.y + sourceRec.height)/height);
                else rlTexCoord2f((sourceRec.x + sourceRec.width)/width, (sourceRec.y + sourceRec.height)/height);
                rlVertex3f(destRec.width, destRec.height, posZ);

                // Top-left corner for texture and quad
                if (flipX) rlTexCoord2f(sourceRec.x/width, sourceRec.y/height);
                else rlTexCoord2f((sourceRec.x + sourceRec.width)/width, sourceRec.y/height);
                rlVertex3f(destRec.width, 0.0f, posZ);
            rlEnd();
        rlPopMatrix();
        rlDisableTexture();
    }
}

Can you make some examples? I don't really sure what posZ is going on. I just learned a method to draw 2D texture in 3D but matrix got in my attention because it is faster (please forgive me my english is bad)