104 lines
2.8 KiB
C#
104 lines
2.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using OpenRA.Traits;
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namespace OpenRA.Graphics
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{
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sealed class TerrainRenderer : IDisposable
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{
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readonly IVertexBuffer<Vertex> vertexBuffer;
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readonly Vertex[] updateCellVertices = new Vertex[4];
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readonly int rowStride;
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readonly WorldRenderer worldRenderer;
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readonly Theater theater;
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readonly CellLayer<TerrainTile> mapTiles;
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readonly Map map;
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float terrainPaletteIndex;
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public TerrainRenderer(World world, WorldRenderer wr)
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{
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worldRenderer = wr;
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theater = wr.Theater;
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map = world.Map;
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mapTiles = map.MapTiles.Value;
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terrainPaletteIndex = wr.Palette("terrain").TextureIndex;
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rowStride = 4 * map.Bounds.Width;
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vertexBuffer = Game.Renderer.Device.CreateVertexBuffer(rowStride * map.Bounds.Height);
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UpdateMap();
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map.MapTiles.Value.CellEntryChanged += UpdateCell;
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map.MapHeight.Value.CellEntryChanged += UpdateCell;
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wr.PaletteInvalidated += () =>
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{
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terrainPaletteIndex = wr.Palette("terrain").TextureIndex;
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UpdateMap();
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};
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}
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void GenerateTileVertices(Vertex[] vertices, int offset, CPos cell)
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{
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var tile = theater.TileSprite(mapTiles[cell]);
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var pos = worldRenderer.ScreenPosition(map.CenterOfCell(cell)) + tile.Offset - 0.5f * tile.Size;
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Util.FastCreateQuad(vertices, pos, tile, terrainPaletteIndex, offset, tile.Size);
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}
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void UpdateMap()
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{
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var nv = 0;
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var vertices = new Vertex[rowStride * map.Bounds.Height];
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foreach (var cell in map.Cells)
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{
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GenerateTileVertices(vertices, nv, cell);
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nv += 4;
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}
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vertexBuffer.SetData(vertices, nv);
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}
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public void UpdateCell(CPos cell)
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{
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var uv = cell.ToMPos(map.TileShape);
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var offset = rowStride * (uv.V - map.Bounds.Top) + 4 * (uv.U - map.Bounds.Left);
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GenerateTileVertices(updateCellVertices, 0, cell);
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vertexBuffer.SetData(updateCellVertices, offset, 4);
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}
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public void Draw(WorldRenderer wr, Viewport viewport)
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{
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var cells = viewport.VisibleCells;
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// Only draw the rows that are visible.
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// VisibleCells is clamped to the map, so additional checks are unnecessary
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var firstRow = cells.TopLeft.ToMPos(map).V - map.Bounds.Top;
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var lastRow = cells.BottomRight.ToMPos(map).V - map.Bounds.Top + 1;
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Game.Renderer.WorldSpriteRenderer.DrawVertexBuffer(
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vertexBuffer, rowStride * firstRow, rowStride * (lastRow - firstRow),
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PrimitiveType.QuadList, wr.Theater.Sheet);
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foreach (var r in wr.World.WorldActor.TraitsImplementing<IRenderOverlay>())
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r.Render(wr);
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}
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public void Dispose()
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{
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vertexBuffer.Dispose();
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}
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}
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}
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