GL.LINES

説明

線(Line)描画の Begin モード

スクリーン空間に 2D の何かを描画したい場合、 probably you will want to use GL.LoadOrtho or GL.LoadPixelMatrix.
"3D" の場合は、実際の 3D 変換の GL.MultMatrix に続けて GL.LoadIdentity の使用を 検討してください。

See Also: GL.Begin, GL.End.

	// Draws a line from "startVertex" var to the curent mouse position.
	var mat : Material;
	private var startVertex : Vector3;
	private var mousePos : Vector3;
	startVertex = Vector3(0,0,0);

	function Update() {
		mousePos = Input.mousePosition;
		// Press space to update startVertex
		if(Input.GetKeyDown(KeyCode.Space)){
			startVertex = Vector3(mousePos.x/Screen.width, mousePos.y/Screen.height, 0);
		}
	}

	function OnPostRender() {
		if (!mat) {
			Debug.LogError("Please Assign a material on the inspector");
			return;
		}
		GL.PushMatrix();
		mat.SetPass(0);
		GL.LoadOrtho();
		GL.Begin(GL.LINES);
		GL.Color(Color.red);
		GL.Vertex(startVertex);
		GL.Vertex(Vector3(mousePos.x/Screen.width, mousePos.y/Screen.height, 0));
		GL.End();
		GL.PopMatrix();
	}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Material mat;
    private Vector3 startVertex;
    private Vector3 mousePos;
    void Update() {
        mousePos = Input.mousePosition;
        if (Input.GetKeyDown(KeyCode.Space))
            startVertex = new Vector3(mousePos.x / Screen.width, mousePos.y / Screen.height, 0);
        
    }
    void OnPostRender() {
        if (!mat) {
            Debug.LogError("Please Assign a material on the inspector");
            return;
        }
        GL.PushMatrix();
        mat.SetPass(0);
        GL.LoadOrtho();
        GL.Begin(GL.LINES);
        GL.Color(Color.red);
        GL.Vertex(startVertex);
        GL.Vertex(new Vector3(mousePos.x / Screen.width, mousePos.y / Screen.height, 0));
        GL.End();
        GL.PopMatrix();
    }
    void Example() {
        startVertex = new Vector3(0, 0, 0);
    }
}