106 lines
3.7 KiB
C#
106 lines
3.7 KiB
C#
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using UnityEngine;
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using System.Collections.Generic;
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using System.Reflection;
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using System;
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namespace UnityEngine.Rendering
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{
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/// <summary>
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/// Helper to build and render a mesh for Gizmos, it is a lot more faster than drawing a ton of gizmos separately
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/// </summary>
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class MeshGizmo : IDisposable
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{
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public static readonly int vertexCountPerCube = 24;
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public Mesh mesh;
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List<Vector3> vertices;
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List<int> indices;
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List<Color> colors;
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Material wireMaterial;
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Material dottedWireMaterial;
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Material solidMaterial;
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public MeshGizmo(int capacity = 0)
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{
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vertices = new List<Vector3>(capacity);
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indices = new List<int>(capacity);
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colors = new List<Color>(capacity);
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mesh = new Mesh { indexFormat = IndexFormat.UInt32, hideFlags = HideFlags.HideAndDontSave };
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#if UNITY_EDITOR
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wireMaterial = (Material)UnityEditor.EditorGUIUtility.LoadRequired("SceneView/HandleLines.mat");
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dottedWireMaterial = (Material)UnityEditor.EditorGUIUtility.LoadRequired("SceneView/HandleDottedLines.mat");
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solidMaterial = UnityEditor.HandleUtility.handleMaterial;
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#endif
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}
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public void Clear()
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{
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vertices.Clear();
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indices.Clear();
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colors.Clear();
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}
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public void AddWireCube(Vector3 center, Vector3 size, Color color)
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{
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var halfSize = size / 2.0f;
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Vector3 p0 = new Vector3(halfSize.x, halfSize.y, halfSize.z);
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Vector3 p1 = new Vector3(-halfSize.x, halfSize.y, halfSize.z);
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Vector3 p2 = new Vector3(-halfSize.x, -halfSize.y, halfSize.z);
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Vector3 p3 = new Vector3(halfSize.x, -halfSize.y, halfSize.z);
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Vector3 p4 = new Vector3(halfSize.x, halfSize.y, -halfSize.z);
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Vector3 p5 = new Vector3(-halfSize.x, halfSize.y, -halfSize.z);
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Vector3 p6 = new Vector3(-halfSize.x, -halfSize.y, -halfSize.z);
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Vector3 p7 = new Vector3(halfSize.x, -halfSize.y, -halfSize.z);
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AddEdge(center + p0, center + p1);
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AddEdge(center + p1, center + p2);
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AddEdge(center + p2, center + p3);
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AddEdge(center + p3, center + p0);
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AddEdge(center + p4, center + p5);
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AddEdge(center + p5, center + p6);
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AddEdge(center + p6, center + p7);
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AddEdge(center + p7, center + p4);
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AddEdge(center + p0, center + p4);
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AddEdge(center + p1, center + p5);
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AddEdge(center + p2, center + p6);
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AddEdge(center + p3, center + p7);
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void AddEdge(Vector3 p1, Vector3 p2)
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{
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vertices.Add(p1);
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vertices.Add(p2);
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indices.Add(indices.Count);
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indices.Add(indices.Count);
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colors.Add(color);
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colors.Add(color);
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}
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}
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void DrawMesh(Matrix4x4 trs, Material mat, MeshTopology topology, CompareFunction depthTest, string gizmoName)
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{
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mesh.Clear();
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mesh.SetVertices(vertices);
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mesh.SetColors(colors);
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mesh.SetIndices(indices, topology, 0);
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mat.SetFloat("_HandleZTest", (int)depthTest);
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var cmd = CommandBufferPool.Get(gizmoName ?? "Mesh Gizmo Rendering");
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cmd.DrawMesh(mesh, trs, mat, 0, 0);
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Graphics.ExecuteCommandBuffer(cmd);
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}
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public void RenderWireframe(Matrix4x4 trs, CompareFunction depthTest = CompareFunction.LessEqual, string gizmoName = null)
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=> DrawMesh(trs, wireMaterial, MeshTopology.Lines, depthTest, gizmoName);
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public void Dispose()
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{
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CoreUtils.Destroy(mesh);
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}
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}
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}
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