//Proof of concept being done with renderdistance = 4
public void Execute(Entity entity, int index, [ReadOnly] ref Translation translation, [ReadOnly] ref Chunk chunk, [ReadOnly] ref Ungenerated ungenerated)
{
ushort x, y, z;
const ushort transparent = 1 << 15;
blocks[entity].Clear();
NativeArray <int> heights = new NativeArray <int>(16 * 16, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (ushort i = 0; i < 16 * 16; i++)
{
//x = (ushort)(i % 16);
//z = (ushort) (i / 16);
heights[i] = 40 + (int)(noise((translation.Value.x + (ushort)(i % 16)) * 0.0078125f,
(translation.Value.z + (ushort)(i / 16)) * 0.0078125f)
* 24.0f);
}
int height;
for (ushort i = 0; i < 16 * 16 * 16; i++)
{
//x = i & 15;
//y = i >> 8;
//z = (i >> 4) & 15;
MortonUtility.m3d_d_sLUT16(i, &x, &y, &z);
//height = 40 + (int) (noise((translation.Value.x + x) * 0.0078125f,
// (translation.Value.z + z) * 0.0078125f)
// * 24.0f);
//heights[z*16+x]
if (translation.Value.y + y < heights[z * 16 + x])
{
if (translation.Value.y + y < 32)
{
//sand
blocks[entity].Add(4);
}
else
{
//dirt
blocks[entity].Add(0);
}
}
else
{
if (translation.Value.y + y < 26)
{
//water
blocks[entity].Add(transparent + 3);
}
else
{
//air
blocks[entity].Add(transparent + 1);
}
}
}
CommandBuffer.RemoveComponent <Ungenerated>(index, entity);
}
//TODO
//Try https://forum.unity.com/threads/dynamicbuffer-is-awfully-slow.728663/
//instead of add-ing
public void Execute(ArchetypeChunk archChunk, int chunkIndex, int firstEntityIndex)
{
//Testing updating meshes slowly
if (meshesThisFrame > 8)
{
return;
}
meshesThisFrame++;
const ushort transparent = 1 << 15;
var entities = archChunk.GetNativeArray(EntityType);
var entity = entities[0];
if (Vertices[entity].Length > 0)
{
//Debug.Log("had to clear");
Vertices[entity].Clear();
Tris[entity].Clear();
Uvs[entity].Clear();
Normals[entity].Clear();
}
//TODO try without any variables and compare
//int xOff = 1;
//int yOff = 256;
//int zOff = 16;
int vertIndex = 0;
ushort x, y, z;
int3 queriedChunkPos;
Entity e;
bool draw = false;
ushort currBlock = 0;
for (ushort i = 0; i < 4096; i++)
{
//skip air
if (blocks[entity][i] == (transparent + 1))
{
continue;
}
//x = i & 15;
//y = i >> 8;
//z = (i >> 4) & 15;
MortonUtility.m3d_d_sLUT16(i, &x, &y, &z);
//Solid cubical blocks are all under 2000
//since i likely cant access static data about block types
//some sort of inherent organization may be necessary for now
//tris 6 others 4
//unity is cw for front facing triangles
//What is faster for checks, reassigning this value, or modifying it with math I wonder
//also test with different check orders, make sure it is optimized
currBlock = blocks[entity][i];
//c# is dumb and returns an int when ~-ing ushorts so i have to take only the bits I need from that
currBlock &= (~transparent & 0xFFFF);
//left
draw = false;
if (x == 0)
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.x -= 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
//hopefully length is always greater than
//wrap x to 15, same y/z
//block is transparent next to this one, so we must draw
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)15, y, z)].Value > transparent)
{
draw = true;
}
}
else
{
//there is no chunk next to this one, so draw (this is the outside)
draw = false;
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16((ushort)(x - 1), y, z)].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(-1, 0, 0));
Normals[entity].Add(new float3(-1, 0, 0));
Normals[entity].Add(new float3(-1, 0, 0));
Normals[entity].Add(new float3(-1, 0, 0));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 0));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 0));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 1));
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 3);
Tris[entity].Add(vertIndex + 2);
//I could use ternary to make it look cleaner but this saves on compares
if (currBlock == 0)
{
Uvs[entity].Add(new float3(1, 0, currBlock + 1));
Uvs[entity].Add(new float3(1, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 0, currBlock + 1));
}
else
{
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
Uvs[entity].Add(new float3(0, 0, currBlock));
}
vertIndex += 4;
}
//right
draw = false;
if (x == 15)
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.x += 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)0, y, z)].Value > transparent)
{
draw = true;
}
}
else
{
draw = false;
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16((ushort)(x + 1), y, z)].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(1, 0, 0));
Normals[entity].Add(new float3(1, 0, 0));
Normals[entity].Add(new float3(1, 0, 0));
Normals[entity].Add(new float3(1, 0, 0));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 0));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 0));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 1));
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 3);
if (currBlock == 0)
{
Uvs[entity].Add(new float3(1, 0, currBlock + 1));
Uvs[entity].Add(new float3(1, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 0, currBlock + 1));
}
else
{
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
Uvs[entity].Add(new float3(0, 0, currBlock));
}
vertIndex += 4;
}
//back
draw = false;
if (z == 0)
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.z -= 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)x, y, 15)].Value > transparent)
{
draw = true;
}
}
else
{
draw = false;
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16(x, y, (ushort)(z - 1))].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(0, 0, -1));
Normals[entity].Add(new float3(0, 0, -1));
Normals[entity].Add(new float3(0, 0, -1));
Normals[entity].Add(new float3(0, 0, -1));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 0));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 0));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 0));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 0));
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 3);
if (currBlock == 0)
{
Uvs[entity].Add(new float3(1, 0, currBlock + 1));
Uvs[entity].Add(new float3(1, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 0, currBlock + 1));
}
else
{
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
Uvs[entity].Add(new float3(0, 0, currBlock));
}
vertIndex += 4;
}
//front
draw = false;
if (z == 15)
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.z += 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)x, y, 0)].Value > transparent)
{
draw = true;
}
}
else
{
draw = false;
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16(x, y, (ushort)(z + 1))].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(0, 0, 1));
Normals[entity].Add(new float3(0, 0, 1));
Normals[entity].Add(new float3(0, 0, 1));
Normals[entity].Add(new float3(0, 0, 1));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 1));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 1));
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 3);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 0);
if (currBlock == 0)
{
Uvs[entity].Add(new float3(1, 0, currBlock + 1));
Uvs[entity].Add(new float3(1, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 1, currBlock + 1));
Uvs[entity].Add(new float3(0, 0, currBlock + 1));
}
else
{
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
Uvs[entity].Add(new float3(0, 0, currBlock));
}
vertIndex += 4;
}
//below
draw = false;
if (y == 0)
{
if (chunk[entity].pos.y == 0)
{
draw = false;
}
else
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.y -= 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)x, 15, z)].Value > transparent)
{
draw = true;
}
}
else
{
draw = false;
}
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16(x, (ushort)(y - 1), z)].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(0, -1, 0));
Normals[entity].Add(new float3(0, -1, 0));
Normals[entity].Add(new float3(0, -1, 0));
Normals[entity].Add(new float3(0, -1, 0));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 0));
Vertices[entity].Add(new float3(x + 0, y + 0, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 0, z + 0));
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 3);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 0);
if (currBlock == 0)
{
Uvs[entity].Add(new float3(0, 0, currBlock + 2));
Uvs[entity].Add(new float3(1, 0, currBlock + 2));
Uvs[entity].Add(new float3(1, 1, currBlock + 2));
Uvs[entity].Add(new float3(0, 1, currBlock + 2));
}
else
{
Uvs[entity].Add(new float3(0, 0, currBlock));
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
}
vertIndex += 4;
}
//above
if (y == 15)
{
queriedChunkPos = chunk[entity].pos;
queriedChunkPos.y += 1;
if (ChunkEntities.TryGetValue(queriedChunkPos, out e))
{
if (blocks[e][(int)MortonUtility.m3d_e_sLUT16((ushort)x, 0, z)].Value > transparent)
{
draw = true;
}
}
else
{
draw = false;
}
}
else if (blocks[entity][(int)MortonUtility.m3d_e_sLUT16(x, (ushort)(y + 1), z)].Value > transparent)
{
draw = true;
}
if (draw)
{
Normals[entity].Add(new float3(0, 1, 0));
Normals[entity].Add(new float3(0, 1, 0));
Normals[entity].Add(new float3(0, 1, 0));
Normals[entity].Add(new float3(0, 1, 0));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 0));
Vertices[entity].Add(new float3(x + 0, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 1));
Vertices[entity].Add(new float3(x + 1, y + 1, z + 0));
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 1);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 0);
Tris[entity].Add(vertIndex + 2);
Tris[entity].Add(vertIndex + 3);
Uvs[entity].Add(new float3(0, 0, currBlock));
Uvs[entity].Add(new float3(1, 0, currBlock));
Uvs[entity].Add(new float3(1, 1, currBlock));
Uvs[entity].Add(new float3(0, 1, currBlock));
vertIndex += 4;
}
}
//meshDirty_in.Dirty = true;
// = new MeshDirty { Entity = entity, Dirty = true };
CommandBuffer.AddComponent <MeshDirty>(chunkIndex, entity, new MeshDirty {
Entity = entity
});
}