98 lines
2.3 KiB
C#
Executable File
98 lines
2.3 KiB
C#
Executable File
using System;
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using Godot;
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using VirtualChemistry.Demo.Concepts;
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public partial class SingleBond : Bond2D
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{
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private static int BIndex(int index, int multi)
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{
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if (multi == 1)
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return 0;
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if (multi % 2 == 1)
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{
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int center = multi / 2 + 1;
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return center - index;
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}
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if (multi % 2 == 0)
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{
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double center = multi / 2 + 0.5;
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return (int)(center > index ? Math.Ceiling(center - index) : Math.Floor(center - index));
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}
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return 0;
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}
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private void MakeCurve(float curveRate=20f, int cDir = 1)
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{
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Vector2 Start = AtomFrom.Position + new Vector2(32, 32);;
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Vector2 End = AtomTo.Position + new Vector2(32, 32);;
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Vector2[] xs = new Vector2[17];
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int[] x2 = new[] { 4, 12 };
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int[] x3 = new[] { 2, 6, 10, 14};
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int[] x4 = new[] { 1, 3, 5, 7, 9, 11, 13, 15 };
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Vector2 vd = End - Start;
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Vector2 nor = vd.Rotated(Mathf.Pi / 2 * cDir);
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Vector2 center = vd / 2 + 4f * nor / curveRate;
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xs[0] = Start;
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xs[16] = End;
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xs[8] = center + xs[0];
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foreach (int i in x2)
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{
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Vector2 v = xs[i + 4] - xs[i - 4];
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Vector2 n = v.Rotated(Mathf.Pi / 2 * cDir);
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Vector2 w = v / 2 + 2f * n / curveRate;
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xs[i] = w + xs[i - 4];
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}
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foreach (int i in x3)
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{
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Vector2 v = xs[i + 2] - xs[i - 2];
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Vector2 n = v.Rotated(Mathf.Pi / 2 * cDir);
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Vector2 w = v / 2 + n / curveRate;
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xs[i] = w + xs[i - 2];
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}
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foreach (int i in x4)
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{
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Vector2 v = xs[i + 1] - xs[i - 1];
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Vector2 n = v.Rotated(Mathf.Pi / 2 * cDir);
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Vector2 w = v / 2 + n / curveRate;
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xs[i] = w + xs[i - 1];
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}
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BondTypeA.Position = xs[10];
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BondTypeB.Position = xs[6];
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Points = xs;
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}
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public override void BondUpdate()
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{
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Reindex();
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int bindex = BIndex(Index, Multi);
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if (bindex == 0)
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{
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Vector2 v1 = AtomFrom.Position + new Vector2(32, 32);
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Vector2 v2 = AtomTo.Position + new Vector2(32, 32);
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Vector2 m = (v1 + v2) / 2;
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Points = new[] { v1, m, v2 };
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BondTypeA.Position = m - new Vector2(10, 10);
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BondTypeB.Position = m + new Vector2(10, 10);
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}
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else
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{
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float curveRate = 25 - Math.Abs(bindex)*5;
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int cDir = bindex > 0 ? 1 : -1;
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MakeCurve(curveRate, cDir);
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}
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BondTypeA.Text = BondFrom.BondType;
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BondTypeB.Text = BondTo.BondType;
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}
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// Called every frame. 'delta' is the elapsed time since the previous frame.
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public override void _Process(double delta)
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{
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}
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}
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