70 lines
2 KiB
C++
70 lines
2 KiB
C++
#include "NightSky.h"
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#include "AtmosphereDefinition.h"
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#include "AtmosphereRenderer.h"
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#include "CelestialBodyDefinition.h"
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#include "Color.h"
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#include "FloatNode.h"
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#include "Geometry.h"
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#include "LightComponent.h"
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#include "LightStatus.h"
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#include "Scenery.h"
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#include "SoftwareRenderer.h"
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#include "SurfaceMaterial.h"
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#include "Vector3.h"
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#include <algorithm>
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NightSky::NightSky(SoftwareRenderer *renderer) : renderer(renderer) {
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}
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NightSky::~NightSky() {
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}
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void NightSky::update() {
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}
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const Color NightSky::getColor(double altitude, const Vector3 &direction) {
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AtmosphereDefinition *atmosphere = renderer->getScenery()->getAtmosphere();
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Color result(0.01, 0.012, 0.03);
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Vector3 location(0.0, altitude, 0.0);
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// Get stars
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Vector3 sun_direction = renderer->getAtmosphereRenderer()->getSunDirection();
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if (sun_direction.y < 0.1) {
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double factor = (sun_direction.y < 0.0) ? 1.0 : 1.0 - (sun_direction.y * 10.0);
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for (const auto &star : atmosphere->stars) {
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if (star.location.dotProduct(direction) >= 0) {
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double radius = star.radius;
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Vector3 hit1, hit2;
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int hits = Geometry::rayIntersectSphere(location, direction, star.location, radius, &hit1, &hit2);
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if (hits > 1) {
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double dist =
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hit2.sub(hit1).getNorm() / radius; // distance between intersection points (relative to radius)
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Color color = star.col;
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if (dist <= 0.5) {
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color.a *= (1.0 - dist / 0.5) * factor;
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}
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result.mask(color);
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}
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}
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}
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}
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return result;
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}
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bool NightSky::getLightsAt(vector<LightComponent> &result, const Vector3 &location) const {
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LightComponent sky;
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sky.color = Color(0.01, 0.012, 0.03).scaled(1.0 - min(location.y / Scenery::ATMOSPHERE_WIDTH_SCALED, 1.0));
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sky.direction = VECTOR_DOWN;
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sky.reflection = 0.0;
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sky.altered = 0;
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result.push_back(sky);
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return true;
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}
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