83 lines
2.3 KiB
C#
83 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using OpenRa.FileFormats;
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using BluntDirectX.Direct3D;
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using System.Drawing;
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using System.IO;
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namespace OpenRa.Game
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{
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class TerrainRenderer
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{
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FvfVertexBuffer<Vertex> vertexBuffer;
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IndexBuffer indexBuffer;
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Sheet terrainSheet;
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TileSet tileSet;
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Renderer renderer;
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Map map;
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public TerrainRenderer(Renderer renderer, Map map, Package tilePackage)
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{
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this.renderer = renderer;
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this.map = map;
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tileSet = new TileSet(tilePackage, map.TileSuffix);
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Dictionary<TileReference, SheetRectangle<Sheet>> tileMapping =
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new Dictionary<TileReference, SheetRectangle<Sheet>>();
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Size tileSize = new Size(24, 24);
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List<Vertex> vertices = new List<Vertex>();
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List<ushort> indices = new List<ushort>();
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for (int j = 0; j < map.Height; j++)
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for (int i = 0; i < map.Width; i++)
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{
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TileReference tileRef = map.MapTiles[i + map.XOffset, j + map.YOffset];
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SheetRectangle<Sheet> tile;
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if (!tileMapping.TryGetValue(tileRef, out tile))
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tileMapping.Add(tileRef, tile = CoreSheetBuilder.Add(tileSet.GetBytes(tileRef), tileSize));
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terrainSheet = tile.sheet;
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Util.CreateQuad(vertices, indices, new PointF(24 * i, 24 * j), tile, 0);
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}
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vertexBuffer = new FvfVertexBuffer<Vertex>(renderer.Device, vertices.Count, Vertex.Format);
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vertexBuffer.SetData(vertices.ToArray());
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indexBuffer = new IndexBuffer(renderer.Device, indices.Count);
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indexBuffer.SetData(indices.ToArray());
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}
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public void Draw( Size screenSize, PointF scrollPos )
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{
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int indicesPerRow = map.Width * 6;
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int verticesPerRow = map.Width * 4;
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int visibleRows = (int)(screenSize.Height / 24.0f + 2);
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int firstRow = (int)(scrollPos.Y / 24.0f);
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int lastRow = firstRow + visibleRows;
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if (lastRow < 0 || firstRow > map.Height)
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return;
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if (firstRow < 0) firstRow = 0;
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if (lastRow > map.Height) lastRow = map.Height;
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renderer.DrawWithShader(ShaderQuality.Low, delegate
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{
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renderer.DrawBatch(vertexBuffer, indexBuffer,
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new Range<int>(verticesPerRow * firstRow, verticesPerRow * lastRow),
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new Range<int>(indicesPerRow * firstRow, indicesPerRow * lastRow),
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terrainSheet.Texture);
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});
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}
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}
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}
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