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@tsubaki
Last active August 31, 2018 07:48
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VectorGraphicsで曲線を描画するデモ
using System.Collections;
using System.Collections.Generic;
using Unity.VectorGraphics;
using UnityEngine;
[RequireComponent(typeof(MeshRenderer))]
[RequireComponent(typeof(MeshFilter))]
[DisallowMultipleComponent]
public class Spline : MonoBehaviour
{
[SerializeField] [Range(0.01f, 0.5f)] float thick;
[SerializeField] Color color;
[SerializeField] Transform[] controlPoints;
private Scene scene;
private Path path;
private VectorUtils.TessellationOptions options;
private Mesh mesh;
void Awake()
{
scene = new Scene();
path = new Path()
{
// パスの設定
Contour = new BezierContour() {
Segments = new BezierPathSegment[3], // 頂点数は3つ
Closed = false // パスを閉じない
},
// 線のパラメーター
PathProps = new PathProperties()
{
Stroke = new Stroke() {
Color = Color.white, // 色
HalfThickness = thick // 線の太さ
}
}
};
// メッシュに形状を登録
// 単一パスなのでルートに登録するだけ
var node = new SceneNode()
{
Drawables = new List<IDrawable> { path }
};
scene.Root = node;
// 生成するメッシュの設定
options = new VectorUtils.TessellationOptions() {
StepDistance = 100,
MaxCordDeviation = 0.05f,
MaxTanAngleDeviation = 0.05f,
SamplingStepSize = 0.01f
};
mesh = new Mesh();
GetComponent<MeshFilter>().mesh = mesh;
}
private void OnDestroy()
{
Destroy(mesh);
}
private void Update()
{
bool isChanged = false;
// ---------------------- セグメント 1 ------------------------
if (controlPoints[0].hasChanged)
{
path.Contour.Segments[0].P0 = controlPoints[0].localPosition;
controlPoints[0].hasChanged = false;
isChanged = true;
}
if (controlPoints[1].hasChanged)
{
path.Contour.Segments[0].P1 = controlPoints[1].localPosition;
controlPoints[1].hasChanged = false;
isChanged = true;
}
// ---------------------- セグメント 2 ------------------------
if (controlPoints[2].hasChanged)
{
path.Contour.Segments[0].P2 = controlPoints[2].localPosition;
controlPoints[2].hasChanged = false;
isChanged = true;
}
if (controlPoints[3].hasChanged)
{
path.Contour.Segments[1].P0 = controlPoints[3].localPosition;
controlPoints[3].hasChanged = false;
isChanged = true;
}
if (controlPoints[4].hasChanged)
{
path.Contour.Segments[1].P1 = controlPoints[4].localPosition;
controlPoints[4].hasChanged = false;
isChanged = true;
}
// ---------------------- セグメント 3 ------------------------
if (controlPoints[5].hasChanged)
{
path.Contour.Segments[1].P2 = controlPoints[5].localPosition;
controlPoints[5].hasChanged = false;
isChanged = true;
}
if (controlPoints[6].hasChanged)
{
path.Contour.Segments[2].P0 = controlPoints[6].localPosition;
controlPoints[6].hasChanged = false;
isChanged = true;
}
if (isChanged)
{
UpdateMesh();
}
}
void UpdateMesh()
{
var geoms = VectorUtils.TessellateScene(scene, options); // ジオメトリを生成
VectorUtils.FillMesh(mesh, geoms, 1.0f); // メッシュに焼き付け
Debug.Log("tranform update");
}
private void OnDrawGizmos()
{
Gizmos.DrawLine(controlPoints[0].localPosition, controlPoints[1].localPosition);
Gizmos.DrawLine(controlPoints[2].localPosition, controlPoints[3].localPosition);
Gizmos.DrawLine(controlPoints[3].localPosition, controlPoints[4].localPosition);
Gizmos.DrawLine(controlPoints[5].localPosition, controlPoints[6].localPosition);
}
}
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tsubaki commented Aug 31, 2018

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