Light.cpp

#include "Light.h"
#include <glm/gtc/type_ptr.hpp>
#include <iostream>

using namespace glm;

// Required for constexpr static members (pre-C++17 inline)
constexpr float PointLight::PRESETS[3];

// ================================================================
//  PointLight
// ================================================================
void PointLight::apply(Shader& shader) {
    shader.setVec3 ("pointLightPos",   position.x,  position.y,  position.z);
    shader.setVec3 ("pointLightColor", color.x,     color.y,     color.z);
    shader.setFloat("pointBrightness", brightness);
}

void PointLight::cycleIntensity() {
    presetIndex = (presetIndex + 1) % 3;
    brightness  = PRESETS[presetIndex];

    const char* names[] = { "Low", "Medium", "High" };
    std::cout << "[PointLight] Intensity: " << names[presetIndex] << std::endl;
}

// ================================================================
//  DirectionalLight
// ================================================================
void DirectionalLight::apply(Shader& shader) {
    shader.setVec3 ("dirLightDir",   direction.x, direction.y, direction.z);
    shader.setVec3 ("dirLightColor", color.x,     color.y,     color.z);
    shader.setFloat("dirBrightness", brightness);
}

// ================================================================
//  SpotLight
// ================================================================
void SpotLight::apply(Shader& shader) {
    shader.setVec3 ("spotPos",        position.x,  position.y,  position.z);
    shader.setVec3 ("spotDir",        direction.x, direction.y, direction.z);
    shader.setVec3 ("spotColor",      color.x,     color.y,     color.z);
    shader.setFloat("spotBrightness", brightness);
    shader.setFloat("spotCutOff",     glm::cos(glm::radians(cutOff)));
    shader.setFloat("spotOuterCutOff",glm::cos(glm::radians(outerCutOff)));
}