A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using UnityEngine;
2using System.Collections.Generic;
3using System.Reflection;
4using System;
5
6namespace UnityEngine.Rendering
7{
8 /// <summary>
9 /// Helper to build and render a mesh for Gizmos, it is a lot more faster than drawing a ton of gizmos separately
10 /// </summary>
11 class MeshGizmo : IDisposable
12 {
13 public static readonly int vertexCountPerCube = 24;
14
15 public Mesh mesh;
16
17 List<Vector3> vertices;
18 List<int> indices;
19 List<Color> colors;
20
21 Material wireMaterial;
22 Material dottedWireMaterial;
23 Material solidMaterial;
24
25 public MeshGizmo(int capacity = 0)
26 {
27 vertices = new List<Vector3>(capacity);
28 indices = new List<int>(capacity);
29 colors = new List<Color>(capacity);
30 mesh = new Mesh { indexFormat = IndexFormat.UInt32, hideFlags = HideFlags.HideAndDontSave };
31#if UNITY_EDITOR
32 wireMaterial = (Material)UnityEditor.EditorGUIUtility.LoadRequired("SceneView/HandleLines.mat");
33 dottedWireMaterial = (Material)UnityEditor.EditorGUIUtility.LoadRequired("SceneView/HandleDottedLines.mat");
34 solidMaterial = UnityEditor.HandleUtility.handleMaterial;
35#endif
36 }
37
38 public void Clear()
39 {
40 vertices.Clear();
41 indices.Clear();
42 colors.Clear();
43 }
44
45 public void AddWireCube(Vector3 center, Vector3 size, Color color)
46 {
47 var halfSize = size / 2.0f;
48 Vector3 p0 = new Vector3(halfSize.x, halfSize.y, halfSize.z);
49 Vector3 p1 = new Vector3(-halfSize.x, halfSize.y, halfSize.z);
50 Vector3 p2 = new Vector3(-halfSize.x, -halfSize.y, halfSize.z);
51 Vector3 p3 = new Vector3(halfSize.x, -halfSize.y, halfSize.z);
52 Vector3 p4 = new Vector3(halfSize.x, halfSize.y, -halfSize.z);
53 Vector3 p5 = new Vector3(-halfSize.x, halfSize.y, -halfSize.z);
54 Vector3 p6 = new Vector3(-halfSize.x, -halfSize.y, -halfSize.z);
55 Vector3 p7 = new Vector3(halfSize.x, -halfSize.y, -halfSize.z);
56
57 AddEdge(center + p0, center + p1);
58 AddEdge(center + p1, center + p2);
59 AddEdge(center + p2, center + p3);
60 AddEdge(center + p3, center + p0);
61
62 AddEdge(center + p4, center + p5);
63 AddEdge(center + p5, center + p6);
64 AddEdge(center + p6, center + p7);
65 AddEdge(center + p7, center + p4);
66
67 AddEdge(center + p0, center + p4);
68 AddEdge(center + p1, center + p5);
69 AddEdge(center + p2, center + p6);
70 AddEdge(center + p3, center + p7);
71
72 void AddEdge(Vector3 p1, Vector3 p2)
73 {
74 vertices.Add(p1);
75 vertices.Add(p2);
76 indices.Add(indices.Count);
77 indices.Add(indices.Count);
78 colors.Add(color);
79 colors.Add(color);
80 }
81 }
82
83 void DrawMesh(Matrix4x4 trs, Material mat, MeshTopology topology, CompareFunction depthTest, string gizmoName)
84 {
85 mesh.Clear();
86 mesh.SetVertices(vertices);
87 mesh.SetColors(colors);
88 mesh.SetIndices(indices, topology, 0);
89
90 mat.SetFloat("_HandleZTest", (int)depthTest);
91
92 var cmd = CommandBufferPool.Get(gizmoName ?? "Mesh Gizmo Rendering");
93 cmd.DrawMesh(mesh, trs, mat, 0, 0);
94 Graphics.ExecuteCommandBuffer(cmd);
95 }
96
97 public void RenderWireframe(Matrix4x4 trs, CompareFunction depthTest = CompareFunction.LessEqual, string gizmoName = null)
98 => DrawMesh(trs, wireMaterial, MeshTopology.Lines, depthTest, gizmoName);
99
100 public void Dispose()
101 {
102 CoreUtils.Destroy(mesh);
103 }
104 }
105}