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 }