}
void FGLight::update_sky_color () {
- // if the 4th field is 0.0, this specifies a direction ...
- // const GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
- const GLfloat base_sky_color[4] = { 0.31, 0.43, 0.69, 1.0 };
- const GLfloat base_fog_color[4] = { 0.63, 0.72, 0.88, 1.0 };
+ const SGVec4f base_sky_color( 0.31, 0.43, 0.69, 1.0 );
+ const SGVec4f base_fog_color( 0.63, 0.72, 0.88, 1.0 );
SG_LOG( SG_EVENT, SG_DEBUG, "Updating light parameters." );
// sky_brightness = 0.15; // used to force a dark sky (when testing)
- // set fog and cloud color
- float sqrt_sky_brightness = (1.0 - sqrt(1.0 - sky_brightness))*_scattering;
- _fog_color[0] = base_fog_color[0] * sqrt_sky_brightness;
- _fog_color[1] = base_fog_color[1] * sqrt_sky_brightness;
- _fog_color[2] = base_fog_color[2] * sqrt_sky_brightness;
- _fog_color[3] = base_fog_color[3];
+ /** fog color */
+ float sqr_sky_brightness = sky_brightness * sky_brightness * _scattering;
+ _fog_color = base_fog_color * sqr_sky_brightness;
gamma_correct_rgb( _fog_color.data() );
- // set sky color
- _sky_color[0] = (base_sky_color[0] + (1.0f-base_sky_color[0]) * _overcast) * sky_brightness;
- _sky_color[1] = (base_sky_color[1] + (1.0f-base_sky_color[1]) * _overcast) * sky_brightness;
- _sky_color[2] = (base_sky_color[2] + (1.0f-base_sky_color[2]) * _overcast) * sky_brightness;
- _sky_color[3] = base_sky_color[3];
+ /** sky color */
+ static const SGVec4f one_vec( 1.0f, 1.0f, 1.0f, 1.0f);
+ SGVec4f overcast_color = (one_vec - base_sky_color) * _overcast;
+ _sky_color = (base_sky_color + overcast_color) * sky_brightness;
gamma_correct_rgb( _sky_color.data() );
- _cloud_color[0] = base_fog_color[0] * sky_brightness;
- _cloud_color[1] = base_fog_color[1] * sky_brightness;
- _cloud_color[2] = base_fog_color[2] * sky_brightness;
- _cloud_color[3] = base_fog_color[3];
+ /** cloud color */
+ _cloud_color = base_fog_color * sky_brightness;
- // adjust the cloud colors for sunrise/sunset effects (darken them)
+ /** adjust the cloud colors for sunrise/sunset effects (darken them) */
if (_sun_angle > 1.0) {
- float sun2 = sqrt(_sun_angle);
- _cloud_color[0] /= sun2;
- _cloud_color[1] /= sun2;
- _cloud_color[2] /= sun2;
+ float sun2 = 1.0 / sqrt(_sun_angle);
+ _cloud_color *= sun2;
}
gamma_correct_rgb( _cloud_color.data() );
- _scene_ambient[0] = _fog_color[0] * ambient;
- _scene_ambient[1] = _fog_color[1] * ambient;
- _scene_ambient[2] = _fog_color[2] * ambient;
- _scene_ambient[3] = 1.0;
+ /** ambient light */
+ _scene_ambient = _fog_color * ambient;
gamma_correct_rgb( _scene_ambient.data() );
+ /** diffuse light */
SGSky* thesky = globals->get_renderer()->getSky();
-
SGVec4f color = thesky->get_scene_color();
- _scene_diffuse[0] = color[0] * diffuse;
- _scene_diffuse[1] = color[1] * diffuse;
- _scene_diffuse[2] = color[2] * diffuse;
- _scene_diffuse[3] = 1.0;
+ _scene_diffuse = color * diffuse;
gamma_correct_rgb( _scene_diffuse.data() );
SGVec4f chrome = _scene_ambient * .4f + _scene_diffuse;
_chromeProps[i]->setValue(static_cast<double>(_scene_chrome[i]));
}
- // _sun_color = thesky->get_sun_color();
- _scene_specular[0] = _sun_color[0] * specular;
- _scene_specular[1] = _sun_color[1] * specular;
- _scene_specular[2] = _sun_color[2] * specular;
- _scene_specular[3] = 1.0;
+ /** specular light */
+ _sun_color = thesky->get_sun_color();
+ _scene_specular = _sun_color * specular;
gamma_correct_rgb( _scene_specular.data() );
}
float rf3 = 1.0 - rf2;
gamma = system_gamma * (0.9 - sif*avf);
- _adj_fog_color[0] = rf3 * _fog_color[0] + rf2 * _sun_color[0];
- _adj_fog_color[1] = rf3 * _fog_color[1] + rf2 * _sun_color[1];
- _adj_fog_color[2] = rf3 * _fog_color[2] + rf2 * _sun_color[2];
+ _adj_fog_color = rf3 * _fog_color + rf2 * _sun_color;;
gamma_correct_rgb( _adj_fog_color.data(), gamma);
// make sure the colors have their original value before they are being