EntitiesSample_9. CrossQuery
该示例重要的内容：1.URPMaterialPropertyBaseColor：Unity.Rendering空间下的材质组件，该结构体拥有一个float4颜色的变量，赋值和其他的组件一样
2.EntityQuery转数组
boxQuery.ToComponentDataArray<LocalTransform>(Allocator.Temp);
3.IJobChunk的利用
new CollisionJob
{
//获取LocalTransform组件的句柄
LocalTransformTypeHandle = SystemAPI.GetComponentTypeHandle<LocalTransform>(true),
//获取DefaultColor组件的句柄
DefaultColorTypeHandle = SystemAPI.GetComponentTypeHandle<DefaultColor>(true),
//获取URPMaterialPropertyBaseColor组件的句柄
BaseColorTypeHandle = SystemAPI.GetComponentTypeHandle<URPMaterialPropertyBaseColor>(),
//获取实体类型的句柄
EntityTypeHandle = SystemAPI.GetEntityTypeHandle(),
//实体查询对象转化为数组句柄
OtherChunks = boxQuery.ToArchetypeChunkArray(state.WorldUpdateAllocator)
//作业调度， Complete()：需要全部完成，然后执行下一次
}.ScheduleParallel(boxQuery, state.Dependency).Complete(); 特别注意的是IJobChunk接口中的句柄变量，都需要 标签修饰，例如：
public ComponentTypeHandle<LocalTransform> LocalTransformTypeHandle;
在Chunk作业中，需要利用ArchetypeChunk chunk获取当前要利用的变量值，示例代码是这样的没什么好解释的，就是双循环判定距离
public struct CollisionJob : IJobChunk
{
public ComponentTypeHandle<LocalTransform> LocalTransformTypeHandle;
public ComponentTypeHandle<DefaultColor> DefaultColorTypeHandle;
public ComponentTypeHandle<URPMaterialPropertyBaseColor> BaseColorTypeHandle;
public EntityTypeHandle EntityTypeHandle;
public NativeArray<ArchetypeChunk> OtherChunks;
public void Execute(in ArchetypeChunk chunk, int unfilteredChunkIndex, bool useEnabledMask,
in v128 chunkEnabledMask)
{
var transforms = chunk.GetNativeArray(ref LocalTransformTypeHandle);
var defaultColors = chunk.GetNativeArray(ref DefaultColorTypeHandle);
var baseColors = chunk.GetNativeArray(ref BaseColorTypeHandle);
var entities = chunk.GetNativeArray(EntityTypeHandle);
for (int i = 0; i < transforms.Length; i++)
{
var transform = transforms;
var baseColor = baseColors;
var entity = entities;
// reset to default color
baseColor.Value = defaultColors.Value;
for (int j = 0; j < OtherChunks.Length; j++)
{
var otherChunk = OtherChunks;
var otherTranslations = otherChunk.GetNativeArray(ref LocalTransformTypeHandle);
var otherEntities = otherChunk.GetNativeArray(EntityTypeHandle);
for (int k = 0; k < otherChunk.Count; k++)
{
var otherTranslation = otherTranslations;
var otherEntity = otherEntities;
if (entity != otherEntity && math.distancesq(transform.Position, otherTranslation.Position) < 1)
{
baseColor.Value.y = 0.5f; // set green channel
break;
}
}
}
baseColors = baseColor;
}
}
}
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