Source:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AtwalPaint : MonoBehaviour {
public Material currentMaterial;
private Color paintColor = Color.red;
private float paintSize = 0.1f;
private bool isPress = false;
private LineRenderer lineRenderer;
private List<Vector3> positions = new List<Vector3>();
private int lineCount = 0;
private void Update()
{
if (Input.GetMouseButtonDown(0))
{
isPress = true;
GameObject go = new GameObject("LineRenderer_" + lineCount);
go.transform.parent = gameObject.transform;
lineRenderer = go.AddComponent<LineRenderer>();
lineRenderer.startColor = paintColor;
lineRenderer.endColor = paintColor;
lineRenderer.startWidth = paintSize;
lineRenderer.endWidth = paintSize;
lineRenderer.material = currentMaterial;
lineRenderer.numCapVertices = 5;
lineRenderer.numCornerVertices = 5;
lineCount++;
AddPosition();
}
if (isPress)
{
AddPosition();
}
if (Input.GetMouseButtonUp(0))
{
lineRenderer = null;
positions.Clear();
isPress = false;
}
}
void AddPosition()
{
Vector3 position = GetMousePoint();
if (positions.Count > 0)
{
if (Vector3.Distance(position, positions[positions.Count - 1]) < 0.1f)
{
return;
}
}
position.z = -0.02f * lineCount;
positions.Add(position);
lineRenderer.positionCount = positions.Count;
lineRenderer.SetPositions(positions.ToArray());
}
Vector3 GetMousePoint()
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
bool isCollider = Physics.Raycast(ray, out hit);
if (isCollider)
{
return hit.point;
}
return Vector3.zero;
}
#region color
public void OnRedColorChange(bool isOn)
{
if (isOn)
{
paintColor = Color.red;
}
}
public void OnGreenColorChange(bool isOn)
{
if (isOn)
{
paintColor = Color.green;
}
}
public void OnBlueColorChange(bool isOn)
{
if (isOn)
{
paintColor = Color.blue;
}
}
#endregion
#region size
public void On1SizeChange(bool isOn)
{
if (isOn)
{
paintSize = 0.1f;
}
}
public void On2SizeChange(bool isOn)
{
if (isOn)
{
paintSize = 0.2f;
}
}
public void On4SizeChange(bool isOn)
{
if (isOn)
{
paintSize = 0.4f;
}
}
#endregion
}