51 lines
1.3 KiB
C#
51 lines
1.3 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using Obi;
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[ExecuteInEditMode]
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public class SpiralCurve : MonoBehaviour {
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public float radius = 0.25f;
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public float radialStep = 0.8f;
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public float heightStep = 0.04f;
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public float points = 30;
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public float rotationalMass = 1;
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public float thickness = 1;
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void Awake ()
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{
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Generate();
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}
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public void Generate()
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{
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var rod = GetComponent<ObiRopeBase>();
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if (rod == null) return;
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var blueprint = rod.sourceBlueprint as ObiRopeBlueprintBase;
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if (blueprint == null) return;
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blueprint.path.Clear();
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float ang = 0;
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float height = 0;
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for (int i = 0; i < points; ++i)
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{
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Vector3 point = new Vector3(Mathf.Cos(ang) * radius, height, Mathf.Sin(ang) * radius);
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// optimal handle length for circle approximation: 4/3 tan(pi/(2n))
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Vector3 tangent = new Vector3(-point.z, heightStep, point.x).normalized * (4.0f / 3.0f) * Mathf.Tan(radialStep / 4.0f) * radius;
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blueprint.path.AddControlPoint(point, -tangent, tangent, Vector3.up, 1, rotationalMass, thickness, 1, Color.white, "control point " + i);
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ang += radialStep;
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height += heightStep;
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}
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blueprint.path.FlushEvents();
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}
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}
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