mirror of
https://mirror.ghproxy.com/https://github.com/dexyfex/CodeWalker
synced 2024-11-16 20:17:30 +08:00
269 lines
8.8 KiB
C#
269 lines
8.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using SharpDX;
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using SharpDX.Direct3D;
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using SharpDX.Direct3D11;
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using Device = SharpDX.Direct3D11.Device;
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using Buffer = SharpDX.Direct3D11.Buffer;
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using SharpDX.DXGI;
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namespace CodeWalker.Rendering
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{
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public class UnitCapsule
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{
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private Buffer VertexBuffer { get; set; }
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private Buffer IndexBuffer { get; set; }
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private InputLayout InputLayout { get; set; }
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private VertexBufferBinding vbbinding;
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private int indexcount;
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private struct SphTri
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{
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public int v1;
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public int v2;
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public int v3;
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public SphTri(int i1, int i2, int i3)
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{
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v1 = i1;
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v2 = i2;
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v3 = i3;
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}
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}
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public UnitCapsule(Device device, byte[] vsbytes, int detail)
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{
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InputLayout = new InputLayout(device, vsbytes, new[]
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{
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new InputElement("POSITION", 0, Format.R32G32B32A32_Float, 0, 0),
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//new InputElement("NORMAL", 0, Format.R32G32B32A32_Float, 16, 0),
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});
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List<Vector4> verts = new List<Vector4>();
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Dictionary<Vector4, int> vdict = new Dictionary<Vector4, int>();
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List<SphTri> curtris = new List<SphTri>();
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//List<SphTri> nxttris = new List<SphTri>();
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verts.Add(new Vector4(0.0f, -1.0f, 0.0f, 0.0f));//top end
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verts.Add(new Vector4(0.0f, 1.0f, 0.0f, 1.0f));//bottom end
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//detail = nlats each hemisphere
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//nlons = detail*4
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int nlats = detail;
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int nlons = detail * 4;
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int firstlat = 1 - nlats;
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int lastlat = nlats-1;
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int lastlon = nlons - 1;
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int vertsperlon = 2 + (nlats - 1) * 2;
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float latrng = 1.0f / (detail);
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float lonrng = 1.0f / (nlons);
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float halfpi = (float)(0.5 * Math.PI);
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float twopi = (float)(2.0 * Math.PI);
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for (int lon = 0; lon < nlons; lon++)
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{
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float tlon = lon * lonrng;
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float rlon = tlon * twopi;
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float lonx = (float)Math.Sin(rlon);
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float lonz = (float)Math.Cos(rlon);
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for (int lat = firstlat; lat < nlats; lat++)
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{
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float tlat = lat * latrng;
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float rlat = tlat * halfpi;
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float laty = (float)Math.Sin(rlat);
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float latxz = (float)Math.Cos(rlat);
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float hemi = (lat > 0) ? 1.0f : 0.0f;
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verts.Add(new Vector4(lonx * latxz, laty, lonz * latxz, hemi));
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if (lat == 0)
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{
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verts.Add(new Vector4(lonx * latxz, laty, lonz * latxz, 1.0f)); //split at the "equator"
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}
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}
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}
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for (int lon = 0; lon < nlons; lon++)
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{
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int i0 = 2 + lon * vertsperlon;//top row
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int i1 = i0 + vertsperlon;
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int i2 = i1 - 1;//bottom row
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int i3 = i2 + vertsperlon;
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if (lon == lastlon)
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{
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i1 = 2;
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i3 = 1 + vertsperlon;
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}
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curtris.Add(new SphTri(0, i1, i0)); //top cap triangles
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for (int lat = firstlat; lat <= lastlat; lat++)
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{
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int offs = lat - firstlat;
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int f1 = i0 + offs;
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int f2 = f1 + vertsperlon;
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int f3 = f1 + 1;
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if (lon == lastlon)
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{
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f2 = 2 + offs;
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}
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int f4 = f2 + 1;
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curtris.Add(new SphTri(f1, f2, f3));
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curtris.Add(new SphTri(f3, f2, f4)); //fill the rest
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}
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curtris.Add(new SphTri(1, i2, i3)); //bottom cap triangles
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}
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#region cube version (unfinished)
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/* cube version
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verts.Add(new Vector4(-1.0f, 0.0f, 0.0f, 0.0f));
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verts.Add(new Vector4(1.0f, 0.0f, 0.0f, 0.0f));
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verts.Add(new Vector4(0.0f, -1.0f, 0.0f, 0.0f));
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verts.Add(new Vector4(0.0f, 1.0f, 0.0f, 1.0f));//bottom end
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verts.Add(new Vector4(0.0f, 0.0f, -1.0f, 0.0f));
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verts.Add(new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
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verts.Add(new Vector4(-1.0f, 0.0f, 0.0f, 1.0f));//0==6 - bottom equator split
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verts.Add(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));//1==7
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verts.Add(new Vector4(0.0f, 0.0f, -1.0f, 1.0f));//4==8
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verts.Add(new Vector4(0.0f, 0.0f, 1.0f, 1.0f));//5==9
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curtris.Add(new SphTri(0, 4, 2));
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curtris.Add(new SphTri(4, 1, 2));
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curtris.Add(new SphTri(1, 5, 2));
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curtris.Add(new SphTri(5, 0, 2));
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curtris.Add(new SphTri(8, 6, 3));//split halves - Y axis
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curtris.Add(new SphTri(7, 8, 3));
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curtris.Add(new SphTri(9, 7, 3));
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curtris.Add(new SphTri(6, 9, 3));
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for (int i = 0; i < verts.Count; i++)
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{
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vdict[verts[i]] = i;
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}
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for (int i = 0; i < detail; i++)
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{
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nxttris.Clear();
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foreach (var tri in curtris)
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{
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Vector4 v1 = verts[tri.v1];
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Vector4 v2 = verts[tri.v2];
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Vector4 v3 = verts[tri.v3];
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Vector4 s1 = new Vector4(Vector3.Normalize((v1 + v2).XYZ()), v1.W);
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Vector4 s2 = new Vector4(Vector3.Normalize((v2 + v3).XYZ()), v1.W);
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Vector4 s3 = new Vector4(Vector3.Normalize((v3 + v1).XYZ()), v1.W);
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int i1, i2, i3;
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if (!vdict.TryGetValue(s1, out i1))
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{
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i1 = verts.Count;
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verts.Add(s1);
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vdict[s1] = i1;
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}
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if (!vdict.TryGetValue(s2, out i2))
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{
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i2 = verts.Count;
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verts.Add(s2);
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vdict[s2] = i2;
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}
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if (!vdict.TryGetValue(s3, out i3))
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{
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i3 = verts.Count;
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verts.Add(s3);
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vdict[s3] = i3;
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}
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nxttris.Add(new SphTri(tri.v1, i1, i3));
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nxttris.Add(new SphTri(tri.v2, i2, i1));
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nxttris.Add(new SphTri(tri.v3, i3, i2));
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nxttris.Add(new SphTri(i1, i2, i3));
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}
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var cur = curtris;
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curtris = nxttris;
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nxttris = cur;
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}
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*/
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#endregion
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List<uint> idata = new List<uint>();
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foreach (var tri in curtris)
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{
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idata.Add((uint)tri.v1);
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idata.Add((uint)tri.v2);
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idata.Add((uint)tri.v3);
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}
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VertexBuffer = Buffer.Create(device, BindFlags.VertexBuffer, verts.ToArray());
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vbbinding = new VertexBufferBinding(VertexBuffer, 16, 0);
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IndexBuffer = Buffer.Create(device, BindFlags.IndexBuffer, idata.ToArray());
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indexcount = idata.Count;
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}
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public void Draw(DeviceContext context)
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{
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context.InputAssembler.InputLayout = InputLayout;
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context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
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context.InputAssembler.SetVertexBuffers(0, vbbinding);
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context.InputAssembler.SetIndexBuffer(IndexBuffer, Format.R32_UInt, 0);
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context.DrawIndexed(indexcount, 0, 0);
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}
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public void DrawInstanced(DeviceContext context, int count)
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{
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context.InputAssembler.InputLayout = InputLayout;
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context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
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context.InputAssembler.SetVertexBuffers(0, vbbinding);
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context.InputAssembler.SetIndexBuffer(IndexBuffer, Format.R32_UInt, 0);
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context.DrawIndexedInstanced(indexcount, count, 0, 0, 0);
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}
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public void Dispose()
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{
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if (VertexBuffer != null)
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{
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VertexBuffer.Dispose();
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VertexBuffer = null;
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}
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if (IndexBuffer != null)
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{
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IndexBuffer.Dispose();
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IndexBuffer = null;
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}
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if (InputLayout != null)
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{
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InputLayout.Dispose();
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InputLayout = null;
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}
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}
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}
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}
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