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Unity Shaderことはじめ4 NavMeshを描画

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はじめに

今回はシェーダーではなく、シェーダーに渡す頂点情報を用意してみるサンプル。

NavMeshはよく使うけど実行中に描画するオプションがなかったので、
何かに使えないかなと思ってNavMeshを参照してみた。

手順

  • NavMeshを生成
  • 頂点情報準備/描画用にEmpty GameObjectを配置
  • GameObjectにMeshFilter, MeshRendererを追加
  • GameObjectにNavMeshのMeshを用意するスクリプト追加

NavMeshからMeshを用意するスクリプト

結構シンプル

using UnityEngine;
using System.Collections;

public class NavMeshDrawer : MonoBehaviour {

	void Awake () {
		//NavMeshの三角形集合取得
		NavMeshTriangulation triangles = NavMesh.CalculateTriangulation();
		
		//三角形集合からMeshを生成
		Mesh mesh = new Mesh();
		mesh.vertices = triangles.vertices;
		mesh.triangles = triangles.indices;
		
		//MeshFilterに生成したMeshを渡す
		MeshFilter filter = GetComponent<MeshFilter>();
		filter.mesh = mesh;
	}	
}
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