const int POINTLIGHT_MAX_NUM = 4;
struct PointLight
{
    vec3 position;
    vec3 color;
};
uniform PointLight pointlights[POINTLIGHT_MAX_NUM];

struct Material
{
    sampler2D albedoMap;
    sampler2D normalMap;
    sampler2D metallicMap;
    sampler2D roughnessMap;
    sampler2D aoMap;
    sampler2D emissionMap;
};
uniform Material material;