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TouchPosition.cs
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TouchPosition.cs
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class TouchPosition : MonoBehaviour {
private Vector2 _box_start_pos = Vector2.zero;
private Vector2 _box_end_pos = Vector2.zero;
public Texture2D SelectionTexture;
/// <summary>
/// Handles the case where the user draws a rectangle to select some units.
/// </summary>
///
void Update ()
{
// Called while the user is holding the mouse down.
if(Input.GetKey(KeyCode.Mouse0))
{
// Called on the first update where the user has pressed the mouse button.
if (Input.GetKeyDown(KeyCode.Mouse0))
_box_start_pos = Input.mousePosition;
else // Else we must be in "drag" mode.
_box_end_pos = Input.mousePosition;
}
else
{
// Handle the case where the player had been drawing a box but has now released.
if (_box_end_pos != Vector2.zero && _box_start_pos != Vector2.zero)
Debug.Log (_box_start_pos);
Debug.Log (_box_end_pos);
// HandleUnitSelection();
// Reset box positions.
//_box_end_pos = _box_start_pos = Vector2.zero;
}
}
/// <summary>
/// Draws the selection rectangle if the user is holding the mouse down.
/// </summary>
///
void OnGUI()
{
// If we are in the middle of a selection draw the texture.
if(_box_start_pos != Vector2.zero && _box_end_pos != Vector2.zero)
{
// Create a rectangle object out of the start and end position while transforming it
// to the screen's cordinates.
var rect = new Rect(_box_start_pos.x, Screen.height - _box_start_pos.y,
_box_end_pos.x - _box_start_pos.x,
-1 * (_box_end_pos.y - _box_start_pos.y));
// Draw the texture.
GUI.DrawTexture(rect, SelectionTexture);
}
}
}