58 lines
1.9 KiB
C#
58 lines
1.9 KiB
C#
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using Godot;
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using Theriapolis.Core;
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using Theriapolis.Core.Tactical;
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namespace Theriapolis.GodotHost.Rendering;
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/// <summary>
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/// One Node2D per tactical chunk. Positioned at (chunk.OriginX, chunk.OriginY)
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/// in world-pixel space; renders all CHUNK_SIZE x CHUNK_SIZE tiles via _Draw.
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///
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/// Godot caches CanvasItem _Draw output, so _Draw runs once on first paint
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/// and the rasterised result is reused every frame thereafter. We only call
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/// QueueRedraw() if the chunk's delta changes (M4 doesn't yet — chunks are
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/// static once generated).
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///
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/// Each tactical tile is 1 world pixel wide; the source sprite is
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/// TACTICAL_TILE_SPRITE_PX² and gets squashed into that 1×1 cell via
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/// DrawTextureRect's destination rect. The camera's zoom (32x for tactical
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/// view) magnifies the rasterisation back to native sprite resolution.
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/// </summary>
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public partial class TacticalChunkNode : Node2D
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{
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private TacticalChunk? _chunk;
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public void Bind(TacticalChunk chunk)
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{
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_chunk = chunk;
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Position = new Vector2(chunk.OriginX, chunk.OriginY);
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QueueRedraw();
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}
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public override void _Draw()
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{
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if (_chunk is null) return;
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int size = C.TACTICAL_CHUNK_SIZE;
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// Pass 1: surfaces.
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for (int ly = 0; ly < size; ly++)
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for (int lx = 0; lx < size; lx++)
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{
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ref var t = ref _chunk.Tiles[lx, ly];
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var tex = TacticalAtlas.GetSurface(t.Surface, t.Variant);
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DrawTextureRect(tex, new Rect2(lx, ly, 1, 1), false);
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}
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// Pass 2: decos on top.
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for (int ly = 0; ly < size; ly++)
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for (int lx = 0; lx < size; lx++)
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{
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ref var t = ref _chunk.Tiles[lx, ly];
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var tex = TacticalAtlas.GetDeco(t.Deco, t.Variant);
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if (tex is null) continue;
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DrawTextureRect(tex, new Rect2(lx, ly, 1, 1), false);
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}
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}
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}
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