Sonnensystem verbessert

public/solarsystem.php

@@ -2194,6 +2194,35 @@ function getMinorPlanetHelioPosition(minorPlanet, date) {
   };
 }
 
+function getMinorPlanetHelioPositionFromEccentricAnomaly(minorPlanet, eccentricAnomaly) {
+  if (!minorPlanet) {
+    return null;
+  }
+
+  const eccentricity = Math.max(0, Math.min(0.999999, minorPlanet.eccentricity));
+  const semimajorAxisAu = minorPlanet.semimajorAxisAu;
+  const inclination = minorPlanet.inclinationDeg * Math.PI / 180;
+  const ascendingNode = minorPlanet.ascendingNodeDeg * Math.PI / 180;
+  const argPerihelion = minorPlanet.argPerihelionDeg * Math.PI / 180;
+  const orbitalX = semimajorAxisAu * (Math.cos(eccentricAnomaly) - eccentricity);
+  const orbitalY = semimajorAxisAu * Math.sqrt(1 - eccentricity ** 2) * Math.sin(eccentricAnomaly);
+  const cosArg = Math.cos(argPerihelion);
+  const sinArg = Math.sin(argPerihelion);
+  const cosNode = Math.cos(ascendingNode);
+  const sinNode = Math.sin(ascendingNode);
+  const cosInc = Math.cos(inclination);
+  const sinInc = Math.sin(inclination);
+  const perifocalX = (cosArg * orbitalX) - (sinArg * orbitalY);
+  const perifocalY = (sinArg * orbitalX) + (cosArg * orbitalY);
+
+  return {
+    x: (cosNode * perifocalX) - (sinNode * perifocalY * cosInc),
+    y: (sinNode * perifocalX) + (cosNode * perifocalY * cosInc),
+    z: perifocalY * sinInc,
+    r: semimajorAxisAu * (1 - eccentricity * Math.cos(eccentricAnomaly)),
+  };
+}
+
 function ensureCometObjects() {
   if (!cometObjects) {
     cometObjects = new Map();
@@ -2383,12 +2412,22 @@ function rebuildMinorPlanetOrbit(id) {
   }
 
   const periodDays = minorPlanet.meanMotionDegPerDay > 0 ? 360 / minorPlanet.meanMotionDegPerDay : 365;
-  const steps = Math.max(180, Math.min(520, Math.round(periodDays / 8)));
+  const steps = Math.max(
+    360,
+    Math.min(
+      1440,
+      Math.round(
+        360
+        + (minorPlanet.eccentricity * 720)
+        + (Math.log10(Math.max(periodDays, 365) / 365) * 220)
+      )
+    )
+  );
   const positions = [];
 
   for (let step = 0; step <= steps; step += 1) {
-    const orbitDate = new Date(Date.parse(`${minorPlanet.epochDateIso}T00:00:00Z`) + ((periodDays * step) / steps) * 86400000);
-    const heliocentric = getMinorPlanetHelioPosition(minorPlanet, orbitDate);
+    const eccentricAnomaly = (step / steps) * Math.PI * 2;
+    const heliocentric = getMinorPlanetHelioPositionFromEccentricAnomaly(minorPlanet, eccentricAnomaly);
     if (!heliocentric) {
       continue;
     }
@@ -3087,7 +3126,7 @@ function attachPointerControls() {
 
   canvas.addEventListener('wheel', (event) => {
     event.preventDefault();
-    camRadiusTarget = Math.max(12, Math.min(900, camRadiusTarget * (1 + event.deltaY * 0.001)));
+    camRadiusTarget = Math.max(12, Math.min(2600, camRadiusTarget * (1 + event.deltaY * 0.001)));
     camRadius = camRadiusTarget;
     updateCamera();
   }, { passive: false });
@@ -3365,7 +3404,7 @@ async function initSolarSystem() {
 
     scene = new THREE.Scene();
 
-    camera = new THREE.PerspectiveCamera(45, 1, 0.1, 2000);
+    camera = new THREE.PerspectiveCamera(45, 1, 0.1, 6000);
     planetMeshes = new Map();
     orbitLines = new Map();
     labelElements = new Map();
@@ -3413,7 +3452,7 @@ async function initSolarSystem() {
       for (let i = 0; i < starCount; i++) {
         const theta = Math.random() * Math.PI * 2;
         const phi = Math.acos(2 * Math.random() - 1);
-        const r = 860 + Math.random() * 80;
+        const r = 2600 + Math.random() * 200;
         positions[i * 3]     = r * Math.sin(phi) * Math.cos(theta);
         positions[i * 3 + 1] = r * Math.sin(phi) * Math.sin(theta);
         positions[i * 3 + 2] = r * Math.cos(phi);