koobas.hobune.stream
This question was
closed May 13, 2020 at 12:24 PM by
GravityL for the following reason:
Other
ECS mesh dissapears on camera move in Game or Scene
Hi, I'm having a weird bug rendering meshes with ECS. It renders but when I move the camera in the Game or Scene view it suddendly dissapears at some points.
A similar code implementing the same methods for chunk generation and triangles creation works just fine with GameObjects.
Here is a video showing it: Youtube
And the code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
using Unity.Rendering;
using Unity.Collections;
using Unity.Transforms;
using Unity.Mathematics;
public class Chunk : MonoBehaviour {
[SerializeField] private Mesh mesh;
[SerializeField] private Material material;
[SerializeField] private int xSize = 16;
[SerializeField] private int ySize = 225;
[SerializeField] private int zSize = 16;
FastNoise noise = new FastNoise();
float[,] heightMap ;
float[,] heightMap2;
private void Start(){
heightMap = new float[xSize,zSize];
heightMap2 = new float[xSize,zSize];
EntityManager entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
EntityArchetype entityArchetype = entityManager.CreateArchetype(
typeof(ChunkSize),
typeof(Translation),
typeof(RenderMesh),
typeof(LocalToWorld),
typeof(RenderBounds)
);
Entity entity = entityManager.CreateEntity(entityArchetype);
//NativeArray<Entity> entityArray = new NativeArray<Entity>(1,Allocator.Temp);
//entityManager.CreateEntity(entityArchetype, entityArray);
DynamicBuffer<Block> dynamicBuffer = entityManager.AddBuffer<Block>(entity);
List<Vector3> vertex = new List<Vector3>();
for(int x=0; x< xSize ; x++)
for(int y=0; y< ySize; y++)
for(int z=0; z< zSize; z++){
float simplex1 = noise.GetSimplex(x*.8f, z*.8f)*10;
float simplex2 = noise.GetSimplex(x * 3f, z * 3f) * 10*(noise.GetSimplex(x*.3f, z*.3f)+.5f);
float heightMap = simplex1 + simplex2;
float dirtHeight = ySize * .5f + heightMap;
dynamicBuffer.Add(new Block{
xCoord = x,
yCoord = y,
zCoord = z,
material = y > dirtHeight ? BlockMaterials.air : BlockMaterials.dirt
});
}
for(int x=0; x<= xSize ; x++)
for(int y=0; y<= ySize; y++)
for(int z=0; z<= zSize; z++){
vertex.Add(new Vector3(x,y,z));
}
DynamicBuffer<Block> blockBuffer = dynamicBuffer.Reinterpret<Block>();
Vector3 max = new Vector3(0,0,0);
foreach (var item in vertex.ToArray())
{
if(Vector3.Distance(item, Vector3.zero) > Vector3.Distance(max, Vector3.zero)){
max = item;
}
}
List<int> triangles = GenerateCubesByTriangles(xSize, ySize, zSize, blockBuffer);
UpdateMesh(vertex.ToArray(),triangles.ToArray());
entityManager.SetSharedComponentData(entity, new RenderMesh{
mesh = mesh,
material = material
});
// entityManager.SetComponentData(entity, new Translation{Value = new float3(0f,0f,0f)});
}
void UpdateMesh(Vector3[] vertices, int[] triangles){
mesh.Clear();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.RecalculateNormals();
}
List<int> GenerateCubesByTriangles(int _xSize, int _ySize, int _zSize, DynamicBuffer<Block> blockBuffer){
List<int> _triangles = new List<int>();
int vert = 0;
for(int x=0; x< _xSize ; x++){
for(int y=0; y< _ySize; y++){
for(int z=0; z< _zSize; z++){
if(blockBuffer[x*ySize+y*zSize+z].material == BlockMaterials.air) {vert++; continue;};
int[] formulas = new int[]{
vert + 0,
vert + 1 ,
vert + (_zSize + 1),
vert + (_zSize + 1) + 1,
vert + (_zSize + 1) * (_ySize + 1),
vert + (_zSize + 1) * (_ySize + 1) + 1,
vert + (_zSize + 1) * (_ySize + 1) + (_zSize + 1) ,
vert + (_zSize + 1) * (_ySize + 1) + (_zSize + 1) + 1
};
/* FRENTE */
if((x==0 &&blockBuffer[x*ySize+y*zSize+z].material != BlockMaterials.air) || (x>0 && blockBuffer[(x-1)*ySize+y*zSize+z].material == BlockMaterials.air)){
_triangles.Add(formulas[2]);
_triangles.Add(formulas[0]);
_triangles.Add(formulas[1]);
_triangles.Add(formulas[3]);
_triangles.Add(formulas[2]);
_triangles.Add(formulas[1]);
}
/* FONDO */
if((x==xSize-1 &&blockBuffer[x*ySize+y*zSize+z].material != BlockMaterials.air) || (x < xSize-1 && blockBuffer[(x+1)*ySize+y*zSize+z].material == BlockMaterials.air)){
_triangles.Add(formulas[4]);
_triangles.Add(formulas[6]);
_triangles.Add(formulas[5]);
_triangles.Add(formulas[5]);
_triangles.Add(formulas[6]);
_triangles.Add(formulas[7]);
}
/* PISO */
if((y==0 &&blockBuffer[x*ySize+y*zSize+z].material != BlockMaterials.air)|| (y>0 && blockBuffer[x*ySize+(y-1)*zSize+z].material == BlockMaterials.air)){
_triangles.Add(formulas[0]);
_triangles.Add(formulas[4]);
_triangles.Add(formulas[5]);
_triangles.Add(formulas[0]);
_triangles.Add(formulas[5]);
_triangles.Add(formulas[1]);
}
/* TECHO */
if(y<ySize-1 && blockBuffer[x*ySize+(y+1)*zSize+z].material == BlockMaterials.air){
_triangles.Add(formulas[7]);
_triangles.Add(formulas[6]);
_triangles.Add(formulas[2]);
_triangles.Add(formulas[7]);
_triangles.Add(formulas[2]);
_triangles.Add(formulas[3]);
}
/* LATERAL */
if((z==0 &&blockBuffer[x*ySize+y*zSize+z].material != BlockMaterials.air) || (z>0 && blockBuffer[x*ySize+y*zSize+z-1].material == BlockMaterials.air)){
_triangles.Add(formulas[6]);
_triangles.Add(formulas[4]);
_triangles.Add(formulas[0]);
_triangles.Add(formulas[2]);
_triangles.Add(formulas[6]);
_triangles.Add(formulas[0]);
}
/* LATERAL2 */
if((z==zSize-1 &&blockBuffer[x*ySize+y*zSize+z].material != BlockMaterials.air) || (z<zSize-1 && blockBuffer[x*ySize+y*zSize+z+1].material == BlockMaterials.air)){
_triangles.Add(formulas[7]);
_triangles.Add(formulas[1]);
_triangles.Add(formulas[5]);
_triangles.Add(formulas[7]);
_triangles.Add(formulas[3]);
_triangles.Add(formulas[1]);
}
vert++;
}
vert++;
}
vert += _zSize + 1;
}
return _triangles;
}
}
Block component:
using UnityEngine;
using Unity.Entities;
using Unity.Rendering;
public struct Block : IBufferElementData {
public BlockMaterials material;
public int xCoord;
public int yCoord;
public int zCoord;
}
public enum BlockMaterials
{
air,
water,
dirt,
stone,
sand,
sandstone
}
