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- /************************************************************************************
- Filename : ONSPPropagationGeometry.cs
- Content : Geometry Functions
- Attach to a game object with meshes and material scripts to create geometry
- NOTE: ensure that Oculus Spatialization is enabled for AudioSource components
- Copyright : Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
- Licensed under the Oculus SDK Version 3.5 (the "License");
- you may not use the Oculus SDK except in compliance with the License,
- which is provided at the time of installation or download, or which
- otherwise accompanies this software in either electronic or hard copy form.
- You may obtain a copy of the License at
- https://developer.oculus.com/licenses/sdk-3.5/
- Unless required by applicable law or agreed to in writing, the Oculus SDK
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- ************************************************************************************/
- #define INCLUDE_TERRAIN_TREES
- using UnityEngine;
- using System;
- using System.Collections.Generic;
- using Oculus.Spatializer.Propagation;
- public class ONSPPropagationGeometry : MonoBehaviour
- {
- public static string GeometryAssetDirectory = "AudioGeometry";
- public static string GeometryAssetPath { get { return Application.streamingAssetsPath + "/" + GeometryAssetDirectory; } }
- //-------
- // PUBLIC
- /// The path to the serialized mesh file that holds the preprocessed mesh geometry.
- public string filePathRelative = "";
- public string filePath { get { return GeometryAssetPath + "/" + filePathRelative; } }
- public bool fileEnabled = false;
- public bool includeChildMeshes = true;
- //-------
- // PRIVATE
- private IntPtr geometryHandle = IntPtr.Zero;
- //-------
- // PUBLIC STATIC
- public static int OSPSuccess = 0;
- public const string GEOMETRY_FILE_EXTENSION = "ovramesh";
- private static string GetPath(Transform current)
- {
- if (current.parent == null)
- return current.gameObject.scene.name + "/" + current.name;
- return GetPath(current.parent) + "-" + current.name;
- }
- /// <summary>
- /// If script is attached to a gameobject, it will try to create geometry
- /// </summary>
- void Awake()
- {
- CreatePropagationGeometry();
- }
- /// <summary>
- /// Call this function to create geometry handle
- /// </summary>
- void CreatePropagationGeometry()
- {
- // Create Geometry
- if (ONSPPropagation.Interface.CreateAudioGeometry(out geometryHandle) != OSPSuccess)
- {
- throw new Exception("Unable to create geometry handle");
- }
- // Upload Mesh
- if (filePath != null && filePath.Length != 0 && fileEnabled && Application.isPlaying)
- {
- if (!ReadFile())
- {
- Debug.LogError("Failed to read file, attempting to regenerate audio geometry");
- // We should not try to upload data dynamically if data already exists
- UploadGeometry();
- }
- }
- else
- {
- UploadGeometry();
- }
- }
- /// <summary>
- /// Update the world transform (TODO)
- /// </summary>
- private void Update()
- {
- if (geometryHandle == IntPtr.Zero)
- return;
- Matrix4x4 m = transform.localToWorldMatrix;
- // Note: flip Z to convert from left-handed (+Z forward) to right-handed (+Z backward)
- float[] matrix = { m[0,0], m[1,0], -m[2,0], m[3,0],
- m[0,1], m[1,1], -m[2,1], m[3,1],
- m[0,2], m[1,2], -m[2,2], m[3,2],
- m[0,3], m[1,3], -m[2,3], m[3,3] };
- ONSPPropagation.Interface.AudioGeometrySetTransform(geometryHandle, matrix);
- }
- /// <summary>
- /// Call when destroyed
- /// </summary>
- private void OnDestroy()
- {
- // DESTROY GEOMETRY
- if (geometryHandle != IntPtr.Zero && ONSPPropagation.Interface.DestroyAudioGeometry(geometryHandle) != OSPSuccess)
- {
- throw new Exception("Unable to destroy geometry");
- }
- geometryHandle = IntPtr.Zero;
- }
- //
- // FUNCTIONS FOR UPLOADING MESHES VIA GAME OBJECT
- //
- static int terrainDecimation = 4;
- private struct MeshMaterial
- {
- public MeshFilter meshFilter;
- public ONSPPropagationMaterial[] materials;
- }
- private struct TerrainMaterial
- {
- public Terrain terrain;
- public ONSPPropagationMaterial[] materials;
- public Mesh[] treePrototypeMeshes;
- }
- private static void traverseMeshHierarchy(GameObject obj, ONSPPropagationMaterial[] currentMaterials, bool includeChildren,
- List<MeshMaterial> meshMaterials, List<TerrainMaterial> terrainMaterials, bool ignoreStatic, ref int ignoredMeshCount)
- {
- if (!obj.activeInHierarchy)
- return;
- MeshFilter[] meshes = obj.GetComponents<MeshFilter>();
- Terrain[] terrains = obj.GetComponents<Terrain>();
- ONSPPropagationMaterial[] materials = obj.GetComponents<ONSPPropagationMaterial>();
- // Initialize the current material array to a new array if there are any new materials.
- if (materials != null && materials.Length > 0)
- {
- // Determine the length of the material array.
- int maxLength = materials.Length;
- if (currentMaterials != null)
- maxLength = Math.Max(maxLength, currentMaterials.Length);
- ONSPPropagationMaterial[] newMaterials = new ONSPPropagationMaterial[maxLength];
- // Copy the previous materials into the new array.
- if (currentMaterials != null)
- {
- for (int i = materials.Length; i < maxLength; i++)
- newMaterials[i] = currentMaterials[i];
- }
- currentMaterials = newMaterials;
- // Copy the current materials.
- for (int i = 0; i < materials.Length; i++)
- currentMaterials[i] = materials[i];
- }
- // Gather the meshes.
- foreach (MeshFilter meshFilter in meshes)
- {
- Mesh mesh = meshFilter.sharedMesh;
- if (mesh == null)
- continue;
- if (ignoreStatic && !mesh.isReadable)
- {
- Debug.LogWarning("Mesh: " + meshFilter.gameObject.name + " not readable, cannot be static.", meshFilter.gameObject);
- ++ignoredMeshCount;
- continue;
- }
- MeshMaterial m = new MeshMaterial();
- m.meshFilter = meshFilter;
- m.materials = currentMaterials;
- meshMaterials.Add(m);
- }
- // Gather the terrains.
- foreach (Terrain terrain in terrains)
- {
- TerrainMaterial m = new TerrainMaterial();
- m.terrain = terrain;
- m.materials = currentMaterials;
- terrainMaterials.Add(m);
- }
- // Traverse to the child objects.
- if (includeChildren)
- {
- foreach (Transform child in obj.transform)
- {
- if (child.GetComponent<ONSPPropagationGeometry>() == null) // skip children which have their own component
- traverseMeshHierarchy(child.gameObject, currentMaterials, includeChildren, meshMaterials, terrainMaterials, ignoreStatic, ref ignoredMeshCount);
- }
- }
- }
- //
- // CALL THIS ON GAME OBJECT THAT HAS GEOMETRY ATTACHED TO IT
- //
- private int uploadMesh(IntPtr geometryHandle, GameObject meshObject, Matrix4x4 worldToLocal)
- {
- int unused = 0;
- return uploadMesh(geometryHandle, meshObject, worldToLocal, false, ref unused);
- }
- private int uploadMesh(IntPtr geometryHandle, GameObject meshObject, Matrix4x4 worldToLocal, bool ignoreStatic, ref int ignoredMeshCount)
- {
- // Get the child mesh objects.
- List<MeshMaterial> meshes = new List<MeshMaterial>();
- List<TerrainMaterial> terrains = new List<TerrainMaterial>();
- traverseMeshHierarchy(meshObject, null, includeChildMeshes, meshes, terrains, ignoreStatic, ref ignoredMeshCount);
- #if INCLUDE_TERRAIN_TREES
- // TODO: expose tree material
- ONSPPropagationMaterial[] treeMaterials = new ONSPPropagationMaterial[1];
- treeMaterials[0] = gameObject.AddComponent<ONSPPropagationMaterial>();
- #if true
- treeMaterials[0].SetPreset(ONSPPropagationMaterial.Preset.Foliage);
- #else
- // Custom material that is highly transmissive
- treeMaterials[0].absorption.points = new List<ONSPPropagationMaterial.Point>{
- new ONSPPropagationMaterial.Point(125f, .03f),
- new ONSPPropagationMaterial.Point(250f, .06f),
- new ONSPPropagationMaterial.Point(500f, .11f),
- new ONSPPropagationMaterial.Point(1000f, .17f),
- new ONSPPropagationMaterial.Point(2000f, .27f),
- new ONSPPropagationMaterial.Point(4000f, .31f) };
- treeMaterials[0].scattering.points = new List<ONSPPropagationMaterial.Point>{
- new ONSPPropagationMaterial.Point(125f, .20f),
- new ONSPPropagationMaterial.Point(250f, .3f),
- new ONSPPropagationMaterial.Point(500f, .4f),
- new ONSPPropagationMaterial.Point(1000f, .5f),
- new ONSPPropagationMaterial.Point(2000f, .7f),
- new ONSPPropagationMaterial.Point(4000f, .8f) };
- treeMaterials[0].transmission.points = new List<ONSPPropagationMaterial.Point>(){
- new ONSPPropagationMaterial.Point(125f, .95f),
- new ONSPPropagationMaterial.Point(250f, .92f),
- new ONSPPropagationMaterial.Point(500f, .87f),
- new ONSPPropagationMaterial.Point(1000f, .81f),
- new ONSPPropagationMaterial.Point(2000f, .71f),
- new ONSPPropagationMaterial.Point(4000f, .67f) };
- #endif
- #endif
- //***********************************************************************
- // Count the number of vertices and indices.
- int totalVertexCount = 0;
- uint totalIndexCount = 0;
- int totalFaceCount = 0;
- int totalMaterialCount = 0;
- foreach (MeshMaterial m in meshes)
- {
- updateCountsForMesh(ref totalVertexCount, ref totalIndexCount, ref totalFaceCount, ref totalMaterialCount, m.meshFilter.sharedMesh);
- }
- for (int i = 0; i < terrains.Count; ++i)
- {
- TerrainMaterial t = terrains[i];
- TerrainData terrain = t.terrain.terrainData;
- #if UNITY_2019_3_OR_NEWER
- int w = terrain.heightmapResolution;
- int h = terrain.heightmapResolution;
- #else
- int w = terrain.heightmapWidth;
- int h = terrain.heightmapHeight;
- #endif
- int wRes = (w - 1) / terrainDecimation + 1;
- int hRes = (h - 1) / terrainDecimation + 1;
- int vertexCount = wRes * hRes;
- int indexCount = (wRes - 1) * (hRes - 1) * 6;
- totalMaterialCount++;
- totalVertexCount += vertexCount;
- totalIndexCount += (uint)indexCount;
- totalFaceCount += indexCount / 3;
- #if INCLUDE_TERRAIN_TREES
- TreePrototype[] treePrototypes = terrain.treePrototypes;
- t.treePrototypeMeshes = new Mesh[treePrototypes.Length];
- // assume the sharedMesh with the lowest vertex is the lowest LOD
- for (int j = 0; j < treePrototypes.Length; ++j)
- {
- GameObject prefab = treePrototypes[j].prefab;
- MeshFilter[] meshFilters = prefab.GetComponentsInChildren<MeshFilter>();
- int minVertexCount = int.MaxValue;
- int index = -1;
- for (int k = 0; k < meshFilters.Length; ++k)
- {
- int count = meshFilters[k].sharedMesh.vertexCount;
- if (count < minVertexCount)
- {
- minVertexCount = count;
- index = k;
- }
- }
- t.treePrototypeMeshes[j] = meshFilters[index].sharedMesh;
- }
- TreeInstance[] trees = terrain.treeInstances;
- foreach (TreeInstance tree in trees)
- {
- updateCountsForMesh(ref totalVertexCount, ref totalIndexCount, ref totalFaceCount, ref totalMaterialCount, t.treePrototypeMeshes[tree.prototypeIndex]);
- }
- terrains[i] = t;
- #endif
- }
- //***********************************************************************
- // Copy the mesh data.
- List<Vector3> tempVertices = new List<Vector3>();
- List<int> tempIndices = new List<int>();
- MeshGroup[] groups = new MeshGroup[totalMaterialCount];
- float[] vertices = new float[totalVertexCount * 3];
- int[] indices = new int[totalIndexCount];
- int vertexOffset = 0;
- int indexOffset = 0;
- int groupOffset = 0;
- foreach (MeshMaterial m in meshes)
- {
- MeshFilter meshFilter = m.meshFilter;
- // Compute the combined transform to go from mesh-local to geometry-local space.
- Matrix4x4 matrix = worldToLocal * meshFilter.gameObject.transform.localToWorldMatrix;
- uploadMeshFilter(tempVertices, tempIndices, groups, vertices, indices, ref vertexOffset, ref indexOffset, ref groupOffset, meshFilter.sharedMesh, m.materials, matrix);
- }
- foreach (TerrainMaterial t in terrains)
- {
- TerrainData terrain = t.terrain.terrainData;
- // Compute the combined transform to go from mesh-local to geometry-local space.
- Matrix4x4 matrix = worldToLocal * t.terrain.gameObject.transform.localToWorldMatrix;
- #if UNITY_2019_3_OR_NEWER
- int w = terrain.heightmapResolution;
- int h = terrain.heightmapResolution;
- #else
- int w = terrain.heightmapWidth;
- int h = terrain.heightmapHeight;
- #endif
- float[,] tData = terrain.GetHeights(0, 0, w, h);
- Vector3 meshScale = terrain.size;
- meshScale = new Vector3(meshScale.x / (w - 1) * terrainDecimation, meshScale.y, meshScale.z / (h - 1) * terrainDecimation);
- int wRes = (w - 1) / terrainDecimation + 1;
- int hRes = (h - 1) / terrainDecimation + 1;
- int vertexCount = wRes * hRes;
- int triangleCount = (wRes - 1) * (hRes - 1) * 2;
- // Initialize the group.
- groups[groupOffset].faceType = FaceType.TRIANGLES;
- groups[groupOffset].faceCount = (UIntPtr)triangleCount;
- groups[groupOffset].indexOffset = (UIntPtr)indexOffset;
- if (t.materials != null && 0 < t.materials.Length)
- {
- t.materials[0].StartInternal();
- groups[groupOffset].material = t.materials[0].materialHandle;
- }
- else
- groups[groupOffset].material = IntPtr.Zero;
- // Build vertices and UVs
- for (int y = 0; y < hRes; y++)
- {
- for (int x = 0; x < wRes; x++)
- {
- int offset = (vertexOffset + y * wRes + x) * 3;
- Vector3 v = matrix.MultiplyPoint3x4(Vector3.Scale(meshScale, new Vector3(y, tData[x * terrainDecimation, y * terrainDecimation], x)));
- vertices[offset + 0] = v.x;
- vertices[offset + 1] = v.y;
- vertices[offset + 2] = v.z;
- }
- }
- // Build triangle indices: 3 indices into vertex array for each triangle
- for (int y = 0; y < hRes - 1; y++)
- {
- for (int x = 0; x < wRes - 1; x++)
- {
- // For each grid cell output two triangles
- indices[indexOffset + 0] = (vertexOffset + (y * wRes) + x);
- indices[indexOffset + 1] = (vertexOffset + ((y + 1) * wRes) + x);
- indices[indexOffset + 2] = (vertexOffset + (y * wRes) + x + 1);
- indices[indexOffset + 3] = (vertexOffset + ((y + 1) * wRes) + x);
- indices[indexOffset + 4] = (vertexOffset + ((y + 1) * wRes) + x + 1);
- indices[indexOffset + 5] = (vertexOffset + (y * wRes) + x + 1);
- indexOffset += 6;
- }
- }
- vertexOffset += vertexCount;
- groupOffset++;
- #if INCLUDE_TERRAIN_TREES
- TreeInstance[] trees = terrain.treeInstances;
- foreach (TreeInstance tree in trees)
- {
- Vector3 pos = Vector3.Scale(tree.position, terrain.size);
- Matrix4x4 treeLocalToWorldMatrix = t.terrain.gameObject.transform.localToWorldMatrix;
- treeLocalToWorldMatrix.SetColumn(3, treeLocalToWorldMatrix.GetColumn(3) + new Vector4(pos.x, pos.y, pos.z, 0.0f));
- // TODO: tree rotation
- Matrix4x4 treeMatrix = worldToLocal * treeLocalToWorldMatrix;
- uploadMeshFilter(tempVertices, tempIndices, groups, vertices, indices, ref vertexOffset, ref indexOffset, ref groupOffset, t.treePrototypeMeshes[tree.prototypeIndex], treeMaterials, treeMatrix);
- }
- #endif
- }
- // Upload mesh data
- return ONSPPropagation.Interface.AudioGeometryUploadMeshArrays(geometryHandle,
- vertices, totalVertexCount,
- indices, indices.Length,
- groups, groups.Length);
- }
- private static void uploadMeshFilter(List<Vector3> tempVertices, List<int> tempIndices, MeshGroup[] groups, float[] vertices, int[] indices,
- ref int vertexOffset, ref int indexOffset, ref int groupOffset, Mesh mesh, ONSPPropagationMaterial[] materials, Matrix4x4 matrix)
- {
- // Get the mesh vertices.
- tempVertices.Clear();
- mesh.GetVertices(tempVertices);
- // Copy the Vector3 vertices into a packed array of floats for the API.
- int meshVertexCount = tempVertices.Count;
- for (int i = 0; i < meshVertexCount; i++)
- {
- // Transform into the parent space.
- Vector3 v = matrix.MultiplyPoint3x4(tempVertices[i]);
- int offset = (vertexOffset + i) * 3;
- vertices[offset + 0] = v.x;
- vertices[offset + 1] = v.y;
- vertices[offset + 2] = v.z;
- }
- // Copy the data for each submesh.
- for (int i = 0; i < mesh.subMeshCount; i++)
- {
- MeshTopology topology = mesh.GetTopology(i);
- if (topology == MeshTopology.Triangles || topology == MeshTopology.Quads)
- {
- // Get the submesh indices.
- tempIndices.Clear();
- mesh.GetIndices(tempIndices, i);
- int subMeshIndexCount = tempIndices.Count;
- // Copy and adjust the indices.
- for (int j = 0; j < subMeshIndexCount; j++)
- indices[indexOffset + j] = tempIndices[j] + vertexOffset;
- // Initialize the group.
- if (topology == MeshTopology.Triangles)
- {
- groups[groupOffset + i].faceType = FaceType.TRIANGLES;
- groups[groupOffset + i].faceCount = (UIntPtr)(subMeshIndexCount / 3);
- }
- else if (topology == MeshTopology.Quads)
- {
- groups[groupOffset + i].faceType = FaceType.QUADS;
- groups[groupOffset + i].faceCount = (UIntPtr)(subMeshIndexCount / 4);
- }
- groups[groupOffset + i].indexOffset = (UIntPtr)indexOffset;
- if (materials != null && materials.Length != 0)
- {
- int matIndex = i;
- if (matIndex >= materials.Length)
- matIndex = materials.Length - 1;
- materials[matIndex].StartInternal();
- groups[groupOffset + i].material = materials[matIndex].materialHandle;
- }
- else
- groups[groupOffset + i].material = IntPtr.Zero;
- indexOffset += subMeshIndexCount;
- }
- }
- vertexOffset += meshVertexCount;
- groupOffset += mesh.subMeshCount;
- }
- private static void updateCountsForMesh(ref int totalVertexCount, ref uint totalIndexCount, ref int totalFaceCount, ref int totalMaterialCount, Mesh mesh)
- {
- totalMaterialCount += mesh.subMeshCount;
- totalVertexCount += mesh.vertexCount;
- for (int i = 0; i < mesh.subMeshCount; i++)
- {
- MeshTopology topology = mesh.GetTopology(i);
- if (topology == MeshTopology.Triangles || topology == MeshTopology.Quads)
- {
- uint meshIndexCount = mesh.GetIndexCount(i);
- totalIndexCount += meshIndexCount;
- if (topology == MeshTopology.Triangles)
- totalFaceCount += (int)meshIndexCount / 3;
- else if (topology == MeshTopology.Quads)
- totalFaceCount += (int)meshIndexCount / 4;
- }
- }
- }
- //***********************************************************************
- // UploadGeometry
- public void UploadGeometry()
- {
- int ignoredMeshCount = 0;
- if (uploadMesh(geometryHandle, gameObject, gameObject.transform.worldToLocalMatrix, true, ref ignoredMeshCount) != OSPSuccess)
- throw new Exception("Unable to upload audio mesh geometry");
- if (ignoredMeshCount != 0)
- {
- Debug.LogError("Failed to upload meshes, " + ignoredMeshCount + " static meshes ignored. Turn on \"File Enabled\" to process static meshes offline", gameObject);
- }
- }
- #if UNITY_EDITOR
- //***********************************************************************
- // WriteFile - Write the serialized mesh file.
- public bool WriteFile()
- {
- if (filePathRelative == "")
- {
- filePathRelative = GetPath(transform);
- string modifier = "";
- int counter = 0;
- while (System.IO.File.Exists(filePath + modifier))
- {
- modifier = "-" + counter;
- ++counter;
- if (counter > 10000)
- {
- // sanity check to prevent hang
- throw new Exception("Unable to find sutiable file name");
- }
- }
- filePathRelative = filePathRelative + modifier;
- Debug.Log("No file path specified, autogenerated: " + filePathRelative);
- }
- // Create the directory
- string directoryName = filePathRelative.Substring(0, filePathRelative.LastIndexOf('/'));
- System.IO.Directory.CreateDirectory(GeometryAssetPath + "/" + directoryName);
- // Create a temporary geometry.
- IntPtr tempGeometryHandle = IntPtr.Zero;
- if (ONSPPropagation.Interface.CreateAudioGeometry(out tempGeometryHandle) != OSPSuccess)
- {
- throw new Exception("Failed to create temp geometry handle");
- }
- // Upload the mesh geometry.
- if (uploadMesh(tempGeometryHandle, gameObject, gameObject.transform.worldToLocalMatrix) != OSPSuccess)
- {
- Debug.LogError("Error uploading mesh " + gameObject.name);
- return false;
- }
- // Write the mesh to a file.
- if (ONSPPropagation.Interface.AudioGeometryWriteMeshFile(tempGeometryHandle, filePath) != OSPSuccess)
- {
- Debug.LogError("Error writing mesh file " + filePath);
- return false;
- }
- // Destroy the geometry.
- if (ONSPPropagation.Interface.DestroyAudioGeometry(tempGeometryHandle) != OSPSuccess)
- {
- throw new Exception("Failed to destroy temp geometry handle");
- }
- return true;
- }
- #endif
- //***********************************************************************
- // ReadFile - Read the serialized mesh file.
- public bool ReadFile()
- {
- if (filePath == null || filePath.Length == 0)
- {
- Debug.LogError("Invalid mesh file path");
- return false;
- }
- if (ONSPPropagation.Interface.AudioGeometryReadMeshFile(geometryHandle, filePath) != OSPSuccess)
- {
- Debug.LogError("Error reading mesh file " + filePath);
- return false;
- }
- return true;
- }
- public bool WriteToObj()
- {
- // Create a temporary geometry.
- IntPtr tempGeometryHandle = IntPtr.Zero;
- if (ONSPPropagation.Interface.CreateAudioGeometry(out tempGeometryHandle) != OSPSuccess)
- {
- throw new Exception("Failed to create temp geometry handle");
- }
- // Upload the mesh geometry.
- if (uploadMesh(tempGeometryHandle, gameObject, gameObject.transform.worldToLocalMatrix) != OSPSuccess)
- {
- Debug.LogError("Error uploading mesh " + gameObject.name);
- return false;
- }
- // Write the mesh to a .obj file.
- if (ONSPPropagation.Interface.AudioGeometryWriteMeshFileObj(tempGeometryHandle, filePath + ".obj") != OSPSuccess)
- {
- Debug.LogError("Error writing .obj file " + filePath + ".obj");
- return false;
- }
- // Destroy the geometry.
- if (ONSPPropagation.Interface.DestroyAudioGeometry(tempGeometryHandle) != OSPSuccess)
- {
- throw new Exception("Failed to destroy temp geometry handle");
- }
- return true;
- }
- }
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