mirror of
https://github.com/aharabada/glitchy-engine-beef.git
synced 2026-09-05 21:01:52 +00:00
initial VoxelGame commit
This commit is contained in:
Simon Lübeß
@@ -0,0 +1,256 @@
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using System.Collections;
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using GlitchyEngine.Renderer;
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using GlitchyEngine.Math;
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using System;
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using System.Diagnostics;
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using static Sandbox.VoxelFun.VoxelTestLayer;
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namespace Sandbox.VoxelFun
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{
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enum BlockFace
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{
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case None = 0;
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case Front = 1;
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case Back = 2;
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case Left = 4;
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case Right = 8;
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case Top = 16;
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case Bottom = 32;
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case All = Bottom | Top | Right | Left | Back | Front;
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public BlockFace Opposite
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{
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get
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{
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switch(this)
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{
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case Front:
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return Back;
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case Back:
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return Front;
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case Left:
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return Right;
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case Right:
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return Left;
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case Top:
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return Bottom;
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case Bottom:
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return Top;
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default:
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return None;
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}
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}
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}
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}
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class VoxelGeometryGenerator
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{
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public GraphicsContext Context;
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public VertexLayout Layout;
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[Inline]
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Color HtoRGB(float h)
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{
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var h;
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h = h % 360.0f;
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float x = (1 - Math.Abs((h / 60.0f) % 2 - 1));
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Vector3 cStrich;
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if(h < 60)
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cStrich = .(1, x, 0);
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else if(h < 120)
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cStrich = .(x, 1, 0);
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else if(h < 180)
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cStrich = .(0, 1, x);
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else if(h < 240)
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cStrich = .(0, x, 1);
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else if(h < 300)
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cStrich = .(x, 0, 1);
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else
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cStrich = .(1, 0, x);
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cStrich *= 255.0f;
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return .((uint8)cStrich.X, (uint8)cStrich.Y, (uint8)cStrich.Z);
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}
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//[/Inline]
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BlockFace GetVisibleFaces(VoxelChunk chunk, int x, int y, int z)
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{
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BlockFace visibleFaces = .None;
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if(z == 0 || chunk.Data[x][y][z - 1] == 0)
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visibleFaces |= .Back;
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if(z == VoxelChunk.SizeZ - 1 || chunk.Data[x][y][z + 1] == 0)
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visibleFaces |= .Front;
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if(x == 0 || chunk.Data[x - 1][y][z] == 0)
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visibleFaces |= .Left;
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if(x == VoxelChunk.SizeX - 1 || chunk.Data[x + 1][y][z] == 0)
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visibleFaces |= .Right;
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if(y == 0 || chunk.Data[x][y - 1][z] == 0)
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visibleFaces |= .Bottom;
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if(y == VoxelChunk.SizeY - 1 || chunk.Data[x][y + 1][z] == 0)
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visibleFaces |= .Top;
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return visibleFaces;
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}
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public GeometryBinding GenerateGeometry(VoxelChunk chunk)
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{
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List<VertexColorTexture> vertices = scope List<VertexColorTexture>();
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List<uint32> indices = scope List<uint32>();
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uint32 lastIndex = 0;
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Stopwatch sw = .StartNew();
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for(int x < VoxelChunk.SizeX)
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for(int y < VoxelChunk.SizeY)
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for(int z < VoxelChunk.SizeZ)
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{
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uint16 blockIndex = chunk.Data[x][y][z];
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Vector3 blockPos = .(x, y, z);
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if(blockIndex != 0)
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{
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BlockFace visibleFaces = GetVisibleFaces(chunk, x, y, z);
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if(visibleFaces != .None)
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GenerateBlockModel(blockIndex, blockPos, visibleFaces, vertices, indices, ref lastIndex);
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}
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}
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GeometryBinding gb;
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if(indices.Count > 0)
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{
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VertexBuffer vb = new VertexBuffer(Context, typeof(VertexColorTexture), (.)vertices.Count, .Default, .None);
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vb.SetData<VertexColorTexture>(vertices);
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IndexBuffer ib = new IndexBuffer(Context, (.)indices.Count, .Default, .None, .Index32Bit);
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ib.SetData<uint32>(indices);
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gb = new GeometryBinding(Context);
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gb.SetVertexBufferSlot(vb, 0);
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gb.SetIndexBuffer(ib);
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gb.SetPrimitiveTopology(.TriangleList);
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gb.SetVertexLayout(Layout);
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vb.ReleaseRef();
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ib.ReleaseRef();
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}
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else
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{
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gb = null;
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}
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sw.Stop();
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Debug.WriteLine($"Generation: {sw.ElapsedMilliseconds}");
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delete sw;
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return gb;
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}
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Random r = new Random(1337) ~ delete _;
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float f = 0.0f;
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void GenerateBlockModel(uint16 blockIndex, Vector3 blockPosition, BlockFace visibleFaces, List<VertexColorTexture> vertices, List<uint32> indices, ref uint32 lastIndex)
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{
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Color c = .Pink;
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if(blockIndex == 1)
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c = .Gray;
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else if(blockIndex == 2)
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c = .SaddleBrown;
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else if(blockIndex == 3)
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c = .Green;
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//Color c = .(blockIndex, blockIndex, blockIndex);
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//c = HtoRGB(f += r.Next(0, 0xBEEF));
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if(blockPosition.Y == 63)
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c = .Red;
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if(visibleFaces.HasFlag(.Back))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 0), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 0), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 0), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 0), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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if(visibleFaces.HasFlag(.Top))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 0), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 0), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 1), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 1), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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if(visibleFaces.HasFlag(.Bottom))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 1), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 1), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 0), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 0), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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if(visibleFaces.HasFlag(.Front))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 1), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 1), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 1), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 1), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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if(visibleFaces.HasFlag(.Right))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 0), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 0, 1), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 1), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(1, 1, 0), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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if(visibleFaces.HasFlag(.Left))
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{
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 1), c, .UnitY));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 0, 0), c, .One));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 0), c, .UnitX));
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vertices.Add(VertexColorTexture(blockPosition + .(0, 1, 1), c, .Zero));
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AddQuadIndices(ref lastIndex, indices);
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}
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}
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void AddQuadIndices(ref uint32 lastIndex, List<uint32> indices)
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{
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uint32[6] inds;
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inds[0] = lastIndex;
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inds[1] = lastIndex + 1;
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inds[2] = lastIndex + 2;
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inds[3] = lastIndex + 2;
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inds[4] = lastIndex + 3;
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inds[5] = lastIndex;
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indices.AddRange(inds);
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lastIndex += 4;
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}
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}
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}
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