Overview

Azmyth is a generic game framework used to create flexible RPG and adventure style games using procedural content generation in C#. It can be used to produce procedurally generated height maps and temperature maps that can be rendered in a variety of ways. It uses QuadTrees and Perlin Noise to generate psuedo-infinite maps in real time. It can also be configured to use different noise algorithms such as Simplex and Value noise. Demos are available in WinForms/GDI+ and XNA.

Features include:

Extensible Asset system.

Perlin Noise, Simplex Noise, Random Noise

Terrain noise generation using strategy pattern.

Flexible Stat/Attribute system.

Markov Chain name/text generator.

Dynamic Chunk loading using QuadTrees.

Planned Features:

Biomes.

Cities and Economic simulation.

Races and Classes.

Noise generators (Worley/Voronoi, Wavelet, etc).

Procedurally generated NPCS, Items, Quests.

Code Samples

Creating a World and Loading Chunks //Create World with random seed World world = new World ( 12345 ) ; //Set parameters world . CoastLine = 0.00 f ; //Coast starts at height 0 world . ShoreLine = 0.05 f ; //Shore line is 5% higher than coast line world . TreeLine = 0.40 f ; //Tree line is 40% higher than coast line world . SnowLine = 0.50 f ; //Snow line is 50% higher than coast line //Load 50x50 chunk at tile 0, 0 TerrainChunk chunk = world . LoadChunk ( new RectangleF ( 0 , 0 , 50 , 50 ) ) ; //Load 10x10 chunk at tile 5, 6 TerrainChunk chunk2 = world . LoadChunk ( new RectangleF ( 5 , 6 , 10 , 10 ) ) ; //Load 100x100 chunk at tile 0, 0 TerrainChunk chunk3 = world . LoadChunk ( new RectangleF ( 100 , 100 , 100 , 100 ) ) ;

Chunk Loading /// <summary> /// Loads tiles from world that are contained within chunkBounds /// </summary> public TerrainChunk ( World world , RectangleF chunkBounds ) : this ( ) { //Calculate total tiles in chunk int totalTiles = ( int ) chunkBounds . Width * ( int ) chunkBounds . Height ; //Loop through each tile for ( int index = 0 ; index < totalTiles ; index + + ) { //Convert index value into x and y coordinates. int cellX = ( int ) ( ( index / chunkBounds . Height ) ) + ( int ) chunkBounds . X ; int cellY = ( int ) ( ( index % chunkBounds . Height ) ) + ( int ) chunkBounds . Y ; //Load tile. TerrainTile tile = world . LoadTile ( cellX , cellY , this ) ; //Insert new tile into chunk QuadTree m_tiles . Insert ( tile ) ; } //Assign local variables m_world = world ; m_bounds = chunkBounds ; }

Chunk Rendering /// <summary> /// Draws the loaded chunks visible in the viewport /// </summary> public void Draw ( ) { //Convert the viewport rectangle into tiles RectangleF viewportRect = ScreenToTile ( new Rectangle ( Viewport . X , Viewport . Y , Viewport . Width , Viewport . Height ) ) ; //Load only the chunks visible in the viewport. (Includes partial chunks) List < TerrainChunk > chunks = m_world . GetChunks ( viewportRect ) ; m_spriteBatch . Begin ( SpriteSortMode . Deferred , null , null , null , null , null , Matrix . CreateTranslation ( 0 , 0 , 0 ) ) ; //Loop through each visible chunk. foreach ( TerrainChunk chunk in chunks ) { //Load only tiles visible in the viewport. (Includes partial tiles) List < TerrainTile > tiles = chunk . GetTiles ( viewportRect ) ; //Loop through each visible tile. foreach ( TerrainTile t in tiles ) { //Draw tile to screen. m_spriteBatch . Draw ( m_cellTextures [ t . Terrain ] , TileToScreen ( t . Bounds ) , Color . White ) ; //Add any additional rendering for tiles here. } // Add any additional rendering for chunks here. } m_spriteBatch . End ( ) ; }

Dynamic Chunk Loading /// <summary> /// Loads Moore Neighborhood of chunks around central chunk specified by X/Y paramters. /// </summary> /// <param name="x">X Origin of central chunk</param> /// <param name="y">Y Origin of central chunk<</param> /// <param name="chunkSize">size of chunks to load</param> public void UpdateChunks ( int x , int y , int chunkSize ) { System . Drawing . RectangleF chunkBounds ; List < Vector > newChunks = new List < Vector > ( ) ; // Calculate Coordinates int chunkX = ( int ) Numbers . ConvertCoordinate ( x , chunkSize ) ; int chunkY = ( int ) Numbers . ConvertCoordinate ( y , chunkSize ) ; // Calculate Moore neighborhood. for ( int offsetY = chunkY - 1 ; offsetY < = chunkY + 1 ; offsetY + + ) { for ( int offsetX = chunkX - 1 ; offsetX < = chunkX + 1 ; offsetX + + ) { newChunks . Add ( new Vector ( offsetX , offsetY , 0 ) ) ; } } // Get all the loaded Chunks. List < TerrainChunk > AllChunks = GetChunks ( ) ; // Cull Chunks outside of neighbor range. foreach ( TerrainChunk chunk in AllChunks ) { if ( ! newChunks . Contains ( new Vector ( ( int ) chunk . Bounds . X , ( int ) chunk . Bounds . Y , 0 ) ) ) { chunkBounds = new System . Drawing . RectangleF ( chunk . Bounds . X , chunk . Bounds . Y , chunkSize , chunkSize ) ; UnloadChunk ( chunkBounds ) ; } } // Load Neighbor Chunks foreach ( Vector chunk in newChunks ) { chunkBounds = new System . Drawing . RectangleF ( chunk . X * chunkSize , chunk . Y * chunkSize , chunkSize , chunkSize ) ; LoadChunk ( chunkBounds ) ; } }

License & Copyright

Copyright (c) 2014 Marissa du Bois

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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