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using System.Collections.Generic;
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using UnityEngine;
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using Mapbox.Unity.MeshGeneration.Data;
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using Mapbox.Unity.Map;
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using Mapbox.Unity.Utilities;
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namespace Mapbox.Unity.MeshGeneration.Factories.TerrainStrategies
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{
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public class FlatTerrainStrategy : TerrainStrategy
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{
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MeshDataArray _cachedQuad;
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public override int RequiredVertexCount
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{
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get { return 4; }
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}
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public override void Initialize(ElevationLayerProperties elOptions)
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{
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_elevationOptions = elOptions;
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}
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public override void RegisterTile(UnityTile tile)
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{
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if (_elevationOptions.unityLayerOptions.addToLayer && tile.gameObject.layer != _elevationOptions.unityLayerOptions.layerId)
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{
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tile.gameObject.layer = _elevationOptions.unityLayerOptions.layerId;
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}
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if (tile.RasterDataState != Enums.TilePropertyState.Loaded ||
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tile.MeshFilter.sharedMesh.vertexCount != RequiredVertexCount)
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{
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if (_elevationOptions.sideWallOptions.isActive)
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{
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var firstMat = tile.MeshRenderer.materials[0];
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tile.MeshRenderer.materials = new Material[2]
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{
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firstMat,
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_elevationOptions.sideWallOptions.wallMaterial
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};
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}
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}
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if ((int)tile.ElevationType != (int)ElevationLayerType.FlatTerrain)
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{
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tile.MeshFilter.sharedMesh.Clear();
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// HACK: This is here in to make the system trigger a finished state.
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GetQuad(tile, _elevationOptions.sideWallOptions.isActive);
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tile.ElevationType = TileTerrainType.Flat;
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}
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if (_elevationOptions.colliderOptions.addCollider)
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{
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var meshCollider = tile.Collider as MeshCollider;
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if (meshCollider)
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{
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meshCollider.sharedMesh = tile.MeshFilter.sharedMesh;
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}
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}
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}
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private void GetQuad(UnityTile tile, bool buildSide)
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{
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if (_cachedQuad != null)
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{
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var mesh = tile.MeshFilter.sharedMesh;
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mesh.vertices = _cachedQuad.Vertices;
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mesh.normals = _cachedQuad.Normals;
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mesh.triangles = _cachedQuad.Triangles;
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mesh.uv = _cachedQuad.Uvs;
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}
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else
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{
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if (buildSide)
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{
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BuildQuadWithSides(tile);
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}
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else
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{
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BuildQuad(tile);
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}
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}
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}
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private void BuildQuad(UnityTile tile)
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{
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var unityMesh = tile.MeshFilter.sharedMesh;
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var verts = new Vector3[4];
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var norms = new Vector3[4];
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verts[0] = tile.TileScale * ((tile.Rect.Min - tile.Rect.Center).ToVector3xz());
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verts[1] = tile.TileScale * (new Vector3((float)(tile.Rect.Max.x - tile.Rect.Center.x), 0, (float)(tile.Rect.Min.y - tile.Rect.Center.y)));
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verts[2] = tile.TileScale * ((tile.Rect.Max - tile.Rect.Center).ToVector3xz());
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verts[3] = tile.TileScale * (new Vector3((float)(tile.Rect.Min.x - tile.Rect.Center.x), 0, (float)(tile.Rect.Max.y - tile.Rect.Center.y)));
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norms[0] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[1] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[2] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[3] = Mapbox.Unity.Constants.Math.Vector3Up;
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unityMesh.vertices = verts;
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unityMesh.normals = norms;
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var trilist = new int[6] { 0, 1, 2, 0, 2, 3 };
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unityMesh.triangles = trilist;
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var uvlist = new Vector2[4]
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{
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new Vector2(0,1),
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new Vector2(1,1),
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new Vector2(1,0),
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new Vector2(0,0)
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};
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unityMesh.uv = uvlist;
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_cachedQuad = new MeshDataArray()
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{
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Vertices = verts,
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Normals = norms,
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Triangles = trilist,
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Uvs = uvlist
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};
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}
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private void BuildQuadWithSides(UnityTile tile)
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{
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var unityMesh = tile.MeshFilter.sharedMesh;
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var verts = new Vector3[20];
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var norms = new Vector3[20];
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verts[0] = tile.TileScale * ((tile.Rect.Min - tile.Rect.Center).ToVector3xz());
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verts[1] = tile.TileScale * (new Vector3((float)(tile.Rect.Max.x - tile.Rect.Center.x), 0, (float)(tile.Rect.Min.y - tile.Rect.Center.y)));
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verts[2] = tile.TileScale * ((tile.Rect.Max - tile.Rect.Center).ToVector3xz());
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verts[3] = tile.TileScale * (new Vector3((float)(tile.Rect.Min.x - tile.Rect.Center.x), 0, (float)(tile.Rect.Max.y - tile.Rect.Center.y)));
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norms[0] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[1] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[2] = Mapbox.Unity.Constants.Math.Vector3Up;
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norms[3] = Mapbox.Unity.Constants.Math.Vector3Up;
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//verts goes
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//01
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//32
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unityMesh.subMeshCount = 2;
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Vector3 norm = Mapbox.Unity.Constants.Math.Vector3Up;
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for (int i = 0; i < 4; i++)
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{
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verts[4 * (i + 1)] = verts[i];
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verts[4 * (i + 1) + 1] = verts[i + 1];
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verts[4 * (i + 1) + 2] = verts[i] + new Vector3(0, -_elevationOptions.sideWallOptions.wallHeight, 0);
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verts[4 * (i + 1) + 3] = verts[i + 1] + new Vector3(0, -_elevationOptions.sideWallOptions.wallHeight, 0);
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norm = Vector3.Cross(verts[4 * (i + 1) + 1] - verts[4 * (i + 1) + 2], verts[4 * (i + 1)] - verts[4 * (i + 1) + 1]).normalized;
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norms[4 * (i + 1)] = norm;
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norms[4 * (i + 1) + 1] = norm;
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norms[4 * (i + 1) + 2] = norm;
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norms[4 * (i + 1) + 3] = norm;
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}
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unityMesh.vertices = verts;
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unityMesh.normals = norms;
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var trilist = new List<int>(6) { 0, 1, 2, 0, 2, 3 };
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unityMesh.SetTriangles(trilist, 0);
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trilist = new List<int>(8);
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for (int i = 0; i < 4; i++)
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{
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trilist.Add(4 * (i + 1));
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trilist.Add(4 * (i + 1) + 2);
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trilist.Add(4 * (i + 1) + 1);
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trilist.Add(4 * (i + 1) + 1);
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trilist.Add(4 * (i + 1) + 2);
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trilist.Add(4 * (i + 1) + 3);
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}
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unityMesh.SetTriangles(trilist, 1);
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var uvlist = new Vector2[20];
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uvlist[0] = new Vector2(0, 1);
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uvlist[1] = new Vector2(1, 1);
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uvlist[2] = new Vector2(1, 0);
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uvlist[3] = new Vector2(0, 0);
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for (int i = 4; i < 20; i += 4)
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{
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uvlist[i] = new Vector2(1, 1);
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uvlist[i + 1] = new Vector2(0, 1);
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uvlist[i + 2] = new Vector2(1, 0);
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uvlist[i + 3] = new Vector2(0, 0);
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}
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unityMesh.uv = uvlist;
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_cachedQuad = new MeshDataArray()
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{
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Vertices = verts,
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Normals = norms,
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Triangles = trilist.ToArray(),
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Uvs = uvlist
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};
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}
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}
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}
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