void SetupOutline(ChunkConfig chunk, Vector2Int loc)
{
var terrainGen = chunk.terrainGen;
using (ComputeBuffer outBuf = new ComputeBuffer(chunk.gridCount, sizeof(float)))
{
// Setup compute shader.
int k = terrainGen.FindKernel("Main");
terrainGen.SetFloat("pi", PI);
terrainGen.SetFloat("rdSeed", chunk.seed);
terrainGen.SetFloats("resolution", chunk.resolution.x, chunk.resolution.y);
terrainGen.SetFloat("caveShrinkY", chunk.caveShrinkY);
terrainGen.SetFloat("caveEliminateY", chunk.caveEliminateY);
terrainGen.SetFloats("roughness", chunk.roughness);
terrainGen.SetFloats("localScale", chunk.localScale.x, chunk.localScale.y);
terrainGen.SetFloats("freq", chunk.frequency.x, chunk.frequency.y);
terrainGen.SetFloats("offset", chunk.OffsetBottomLeft(loc).x, chunk.OffsetBottomLeft(loc).y);
terrainGen.SetFloats("amplitude", chunk.amplitude.x, chunk.amplitude.y);
terrainGen.SetBuffer(k, "output", outBuf);
// Draw chunk terrain.
terrainGen.Dispatch(k, CeilToInt(chunk.resolution.x / 16.0f), CeilToInt(chunk.resolution.y / 16.0f), 1);
// check the databuf and its size.
if (dataBuf == null || dataBuf.Length != chunk.gridCount)
{
dataBuf = new float[chunk.gridCount];
}
// get data from GPU back into main memory.
outBuf.GetData(dataBuf);
}
// Check chunk points.
// Mesh vertices should be in *local* space that relative to the bottom-left corner.
if (segs == null)
{
segs = new List <Segment>();
}
segs.Clear();
for (int x = 0; x < chunk.resolution.x; x++)
{
for (int y = 0; y < chunk.resolution.y; y++)
{
int val = RoundToInt(dataBuf[x + y * chunk.resolution.x]) ^ 0xF;
MarchingCube.Get(val, new Vector2(x, y), segs);
}
}
for (int i = 0; i < segs.Count; i++)
{
segs[i] = new Segment(segs[i].from * chunk.localScale, segs[i].to * chunk.localScale);
}
lks = segs.LinkUp().Smooth(Util.SmoothAverage).Smooth(Util.SmoothFill);
}
// Take configurations and setup all components of this GameObject.
public GameObject Setup(ChunkConfig config, Vector2Int loc)
{
this.gameObject.name = loc.EncodeChunkOffset();
// Setup verts and indices.
SetupOutline(config, loc);
// Prepare component builds.
var verts = new List <Vector3>();
foreach (var lk in lks)
{
for (int i = 1; i < lk.Count; i++)
{
verts.Add(lk[i - 1]);
verts.Add(lk[i]);
}
}
// Build up mesh.
// This mesh is used for rendering outlines.
var ms = gameObject.GetComponent <MeshFilter>();
var indices = new List <int>();
indices.AddIntRange(0, verts.Count - 1);
ms.mesh = new Mesh().SubmitData(verts, indices, MeshTopology.Lines);
// Build up colliders.
var col = new List <EdgeCollider2D>(GetComponentsInChildren <EdgeCollider2D>());
for (int i = 0; i < lks.Count; i++)
{
if (col.Count <= i)
{
col.Add(this.gameObject.AddComponent <EdgeCollider2D>());
}
var cx = col[i];
cx.points = lks[i].ToArray();
cx.offset = Vector2.zero;
cx.sharedMaterial = config.terrainMaterial;
}
transform.position = config.OffsetBottomLeft(loc);
this.config = config;
return(this.gameObject);
}
