Light.cpp

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#include "Light.h"

Light::Light(int id)
{
        light_id = GL_LIGHT0 + id;
        
        ambient[0] = ambient[1] = ambient[2] = ambient[3] = 0;
        diffuse[0] = diffuse[1] = diffuse[2] = diffuse[3] = 0;
        specular[0] = specular[1] = specular[2] = specular[3] = 0;
        position[0] = position[1] = position[2] = 0;
        position[3] = is_positional = true;
        spot_dir[0] = spot_dir[1] = spot_dir[2] = 0;
        spot_exp = 1;
        spot_cutoff = 0;
        const_atten = 1;
        lin_atten = 0;
        quad_atten = 0;
        
        SetAll();
}

void Light::SetAll()
{
    glLightfv(light_id, GL_AMBIENT, ambient);
    glLightfv(light_id, GL_DIFFUSE, diffuse);
    glLightfv(light_id, GL_SPECULAR, specular);
    glLightfv(light_id, GL_POSITION, position);
    glLightfv(light_id, GL_SPOT_DIRECTION, spot_dir);
//    glLightfv(light_id, GL_SPOT_EXPONENT, const float(spot_exp));
//    glLightfv(light_id, GL_SPOT_CUTOFF, const(spot_cutoff));
//    glLightfv(light_id, GL_CONSTANT_ATTENUATION, const(const_atten));
//    glLightfv(light_id, GL_LINEAR_ATTENUATION, const(lin_atten));
//    glLightfv(light_id, GL_QUADRATIC_ATTENUATION, const(quad_atten));
}

void Light::SetPos(glVector new_pos)
{
    position[0] = new_pos.data[0];
    position[1] = new_pos.data[1];
    position[2] = new_pos.data[2];
    position[3] = is_positional;

    glLightfv(light_id, GL_POSITION, position);
}

void Light::SetColor(Color new_color, light_type type)
{
    switch (type)
    {
        case AMBIENT:
            glLightfv(light_id, GL_AMBIENT, new_color.color);
            break;
        case DIFFUSE:
            glLightfv(light_id, GL_DIFFUSE, new_color.color);
            break;
        case SPECULAR:
            glLightfv(light_id, GL_SPECULAR, new_color.color);
            break;
    }
}

void Light::Update()
{
    glLightfv(light_id, GL_POSITION, position);
}

void Light::On()
{
    glEnable(light_id);
}

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