Utils.hpp

#pragma once
 
#include <glm/glm.hpp>
#include <string>

namespace light {
    enum LightType {
        LIGHT_DIRECTIONAL,
        LIGHT_POINT,
        LIGHT_SPOT,
    };
} // namespace light
 
// REMOVE THIS LINE
using namespace light;
 
#define SHADER_MAX_LIGHTS 32

struct LightConstraint {
    float constant = 1.f;
    float linear = .09f;
    float quadratic = .032f;
};

struct LightVectors {
    glm::vec3 ambient{.1f, .1f, .1f};
    glm::vec3 diffuse{.8f, .8f, .8f};
    glm::vec3 specular{1, 1, 1};
};
 
struct LightShaderBlock {
    int type = LightType::LIGHT_DIRECTIONAL;
    float intensity = 1;
    glm::vec3 color{1, 1, 1};
 
    glm::vec3 position{};
    glm::vec3 direction{};
 
    glm::vec3 ambient{.1f, .1f, .1f};
    glm::vec3 diffuse{.8f, .8f, .8f};
    glm::vec3 specular{1, 1, 1};
 
    float constant = 1;
    float linear = .09f;
    float quadratic = .032f;
 
    float cutoff = 12.5f;
    float outerCutoff = 17.5f;
 
    bool isSmooth = false;
};
 
enum LightComputation {
    NONE,
    PHONG,
    BLINN_PHONG,
    INT_PHONG,
    INT_BLINN_PHONG,
};
 
unsigned char *readImageData(const std::string &path, int &width, int &height, int &nrChannels, int desiredChannels = 0);
 
void flipImagesVertically(const bool &val);
 
void freeImageData(void *data);