GeezerVison is showing github.com — Silverback/LevelEditor/Engine/Terrain.cs at master · SilverbackSoPra/Silverback

Expand file tree

Terrain.cs

Copy path

More file actions

Latest commit

History

324 lines (241 loc) · 11.6 KB

Terrain.cs

Copy path

File metadata and controls

324 lines (241 loc) · 11.6 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

using System;

using LevelEditor.Engine.Mesh;

using Microsoft.Xna.Framework;

using Microsoft.Xna.Framework.Content;

using Microsoft.Xna.Framework.Graphics;

using System.IO;

using System.Runtime.Serialization;

using System.Xml.Serialization;

namespace LevelEditor.Engine

{

[Serializable()]

public sealed class Terrain : IActor, ISerializable

{

public Actor Actor { get; }

public int Size { get; }

[XmlIgnore]

public Grass mGrass;

private const float TerrainScale = 1.0f;

private readonly float TerrainMaxHeight = 40.0f;

private const float TextureRepitions = 1.0f;

private readonly int mHeight;

private readonly int mWidth;

public readonly string mHeightMapPath;

public readonly string mTexturePath;

private readonly ContentManager mContent;

private readonly GraphicsDevice mGraphics;

public void Update(GameTime gameTime)

{

throw new NotImplementedException();

}

public Terrain(ContentManager content, GraphicsDevice device, string heightMapPath, string texturePath)

{

mContent = content;

mGraphics = device;

mHeightMapPath = heightMapPath;

mTexturePath = texturePath;

var meshData = new MeshData();

var heightMapStream = new FileStream(heightMapPath, FileMode.Open, FileAccess.Read);

var heightmap = Texture2D.FromStream(device, heightMapStream);

heightMapStream.Close();

mWidth = heightmap.Width;

mHeight = heightmap.Height;

meshData.mVertices = new VertexPositionTexture[mWidth * mHeight];

meshData.mIndices = new int[(mWidth * 2 + 2) * (mHeight - 1)];

var subData = new MeshData.SubData();

var material = new Material();

var textureStream = new FileStream(texturePath, FileMode.Open, FileAccess.Read);

material.mDiffuseMap = Texture2D.FromStream(device, textureStream);

material.DiffuseMapStream = textureStream;

material.mGraphicsDevice = device;

textureStream.Close();

material.mDiffuseColor = new Vector3(1.0f);

subData.mIndicesOffset = 0;

subData.mMaterialIndex = 0;

subData.mNumPrimitives = (heightmap.Width * 2 + 2) * (heightmap.Height - 1);

meshData.mMaterials.Add(material);

meshData.mSubDatas.Add(subData);

meshData.mPrimitiveType = PrimitiveType.TriangleStrip;

meshData.mTotalNumPrimitives = (heightmap.Width * 2 + 2) * (heightmap.Height - 1);

meshData.mBoundingSphere.Radius = (float)Math.Sqrt(Math.Pow(heightmap.Width / 2.0f, 2) + Math.Pow(heightmap.Height / 2.0f, 2));

meshData.mIsTerrain = true;

Actor = new Actor(new Mesh.Mesh(mGraphics, meshData),null) {mCastShadow = false};

Size = mWidth;

LoadVertices(heightmap);

LoadIndices();

Actor.mMesh.UpdateData();

mGrass = new Grass(this);

mGrass.Generate();

}

public void Reload()

{

var meshData = Actor.mMesh.mMeshData;

var heightMapStream = new FileStream(mHeightMapPath, FileMode.Open, FileAccess.Read);

var heightmap = Texture2D.FromStream(mGraphics, heightMapStream);

heightMapStream.Close();

if (heightmap.Height == mHeight && heightmap.Width == mWidth)

{

var textureStream = new FileStream(mTexturePath, FileMode.Open, FileAccess.Read);

meshData.mMaterials[0].mDiffuseMap = Texture2D.FromStream(mGraphics, textureStream);

textureStream.Close();

LoadVertices(heightmap);

Actor.mMesh.UpdateData();

mGrass.Generate();

}

public float GetHeight(Vector3 location)

{

float height;

var x = mWidth / 2f + location.X;

var z = mHeight / 2f + location.Z;

if (x < 0 || z < 0 || x >= (mWidth - 1) * TerrainScale || z >= (mHeight - 1) * TerrainScale)

{

return 0.0f;

}

var position = new Vector2((int)Math.Floor(x / TerrainScale), (int)Math.Floor(z / TerrainScale));

if (position.X < 0 || position.Y < 0 ||

(int)position.X >= mWidth * TerrainScale || (int)position.Y >= mHeight * TerrainScale)

{

return 0.0f;

}

var coord = new Vector2(x % TerrainScale / TerrainScale, z % TerrainScale / TerrainScale);

if (coord.X > coord.Y)

{

height = BarryCentric(new Vector3(0.0f,

Actor.mMesh.mMeshData.mVertices[(int)(position.X + mWidth * position.Y)].Position.Y,

0.0f),

new Vector3(1.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + 1 + mWidth * position.Y)].Position.Y, 0.0f),

new Vector3(1.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + 1 + mWidth * (position.Y + 1))].Position.Y, 1.0f),

coord);

}

else

{

height = BarryCentric(new Vector3(0.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + mWidth * position.Y)].Position.Y, 0.0f),

new Vector3(1.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + 1 + mWidth * (position.Y + 1))].Position.Y, 1.0f),

new Vector3(0.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + mWidth * (position.Y + 1))].Position.Y, 1.0f),

coord);

}

return height;

}

public float GetSlope(Vector3 location)

{

var x = mWidth / 2f + location.X;

var z = mHeight / 2f + location.Z;

if (x < 0 || z < 0 || x >= (mWidth - 1) * TerrainScale || z >= (mHeight - 1) * TerrainScale)

{

return 0.0f;

}

var position = new Vector2((int)Math.Floor(x / TerrainScale), (int)Math.Floor(z / TerrainScale));

if (position.X < 0 || position.Y < 0 ||

(int)position.X >= mWidth * TerrainScale || (int)position.Y >= mHeight * TerrainScale)

{

return 0.0f;

}

var northWest = new Vector3(0.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + mWidth * position.Y)].Position.Y, 0.0f);

var northEast = new Vector3(1.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + 1 + mWidth * position.Y)].Position.Y, 0.0f);

var southWest = new Vector3(0.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + mWidth * (position.Y + 1))].Position.Y, 1.0f);

var southEast = new Vector3(1.0f, Actor.mMesh.mMeshData.mVertices[(int)(position.X + 1 + mWidth * (position.Y + 1))].Position.Y, 1.0f);

var min = northWest;

min = min.Y > northEast.Y ? northEast : min;

min = min.Y > southWest.Y ? southWest : min;

min = min.Y > southEast.Y ? southEast : min;

var max = northWest;

max = max.Y < northEast.Y ? northEast : max;

max = max.Y < southWest.Y ? southWest : max;

max = max.Y < southEast.Y ? southEast : max;

var distance = Vector2.Distance(new Vector2(min.X, min.Z), new Vector2(max.X, max.Z));

var difference = max.Y - min.Y;

return (float)Math.Sinh(difference / distance);

}

private float GetHeightFromData(VertexPositionTexture[] vertices, int x, int z)

{

if (x < mWidth && z < mHeight && z >= 0 && x >= 0)

{

return vertices[z * mWidth + x].Position.Y;

}

else

{

return vertices[0].Position.Y;

}

private static float BarryCentric(Vector3 p1, Vector3 p2, Vector3 p3, Vector2 pos)

{

var det = (p2.Z - p3.Z) * (p1.X - p3.X) + (p3.X - p2.X) * (p1.Z - p3.Z);

var l1 = ((p2.Z - p3.Z) * (pos.X - p3.X) + (p3.X - p2.X) * (pos.Y - p3.Z)) / det;

var l2 = ((p3.Z - p1.Z) * (pos.X - p3.X) + (p1.X - p3.X) * (pos.Y - p3.Z)) / det;

var l3 = 1.0f - l1 - l2;

return l1 * p1.Y + l2 * p2.Y + l3 * p3.Y;

}

private void LoadVertices(Texture2D heightMap)

{

var newHeightVal = new Color[mWidth * mHeight];

heightMap.GetData(newHeightVal);

var meshData = Actor.mMesh.mMeshData;

for (int z = 0; z < mHeight; z++)

{

for (int x = 0; x < mWidth; x++)

{

//Position

meshData.mVertices[x + z * mWidth].Position.X = (x - mWidth / 2.0f) * TerrainScale;

meshData.mVertices[x + z * mWidth].Position.Y = newHeightVal[x + z * mWidth].G / 255.0f * TerrainMaxHeight;

meshData.mVertices[x + z * mWidth].Position.Z = (z - mHeight / 2.0f) * TerrainScale;

//Texture

meshData.mVertices[x + z * mWidth].TextureCoordinate.X = (float)x / mWidth * TextureRepitions;

meshData.mVertices[x + z * mWidth].TextureCoordinate.Y = (float)z / mHeight * TextureRepitions;

}

private void LoadIndices()

{

var meshData = Actor.mMesh.mMeshData;

//Calculates the triangle strip

var i = 0;

for (int z = 0; z < mHeight - 1; z++)

{

meshData.mIndices[i++] = z * mWidth;

for (int x = 0; x < mWidth; x++)

{

meshData.mIndices[i++] = z * mWidth + x;

meshData.mIndices[i++] = (z + 1) * mWidth + x;

}

meshData.mIndices[i++] = (z + 1) * mWidth + (mWidth - 1);

}

public void GetObjectData(SerializationInfo info, StreamingContext context)

{

info.AddValue("Actor", Actor);

info.AddValue("Size", Size);

info.AddValue("mGrass", mGrass);

info.AddValue("TerrainMaxHeight", TerrainMaxHeight);

info.AddValue("mHeight", mHeight);

info.AddValue("mWidth", mWidth);

info.AddValue("mHeightMapPath", mHeightMapPath);

info.AddValue("mTexturePath", mTexturePath);

info.AddValue("mContent", mContent);

info.AddValue("mGraphics", mGraphics);

}

public Terrain(SerializationInfo info, StreamingContext context)

{

Actor = (Actor)info.GetValue("Actor", typeof(Actor));

Size = (int)info.GetValue("Size", typeof(int));

mGrass = (Grass)info.GetValue("mGrass", typeof(Grass));

TerrainMaxHeight = (float)info.GetValue("TerrainMaxHeight", typeof(float));

mHeight = (int)info.GetValue("mHeight", typeof(int));

mWidth = (int)info.GetValue("mWidth", typeof(int));

mHeightMapPath = (string)info.GetValue("mHeightMapPath", typeof(string));

mTexturePath = (string)info.GetValue("mTexturePath", typeof(string));

mContent = (ContentManager)info.GetValue("mContent", typeof(ContentManager));

mGraphics = (GraphicsDevice)info.GetValue("mGraphics", typeof(GraphicsDevice));

}

public Terrain()

{

mGrass = new Grass(this);

}

[OnDeserialized()]

internal void OnSerializedMethod(StreamingContext context)

{

// Setting this as parent property for Child object

Actor.IActor = this;

}