ThomagicRenderer/Runtime/InstanceMatrix.cs

using UnityEngine;

namespace Assets.ThoMagic.Renderer
{
    public struct InstanceData
    {
        public const int Add = 1;
        public const int Delete = 2;
        public static readonly int Stride = 48;
        public readonly Vector4 Packed1;
        public readonly Vector4 Packed2;
        public readonly uint prefabId;
        //Used to stream out new instances
        public readonly int uploadAction;
        public readonly int uploadId;
        public readonly int padding;

        public InstanceData(
          int uploadAction,
          int uploadId,
          uint prefabId,
          float x,
          float y,
          float z,
          in Quaternion rotation,
          float scaleXZ,
          float scaleY)
        {
            float num = rotation.w > 0.0 ? 1f : -1f;
            Packed1.x = x;
            Packed1.y = y;
            Packed1.z = z;
            Packed1.w = (rotation.x * num);
            Packed2.x = scaleXZ;
            Packed2.y = scaleY;
            Packed2.z = (rotation.y * num);
            Packed2.w = (rotation.z * num);
            this.prefabId = prefabId;
            this.uploadAction = uploadAction;
            this.uploadId = uploadId;
            padding = 0;
        }

        public InstanceData(
          int uploadAction,
          int uploadId)
        {
            Packed1.x = 0;
            Packed1.y = 0;
            Packed1.z = 0;
            Packed1.w = 0;
            Packed2.x = 0;
            Packed2.y = 0;
            Packed2.z = 0;
            Packed2.w = 0;
            this.prefabId = 0;
            this.uploadAction = uploadAction;
            this.uploadId = uploadId;
            padding = 0;
        }
    }

    public struct PrefabData
    {
        public static readonly int Stride = 228;
        public uint batchIndex;
        public uint indexBufferStartOffset;
        public uint maxCount;
        public uint lodCount;
        public uint fadeLods;
        public Vector4 densityInDistance;
        public Vector4 lodData0;
        public Vector4 lodData1;
        public Vector4 lodData2;
        public Vector4 lodData3;
        public Vector4 lodData4;
        public Vector4 lodData5;
        public Vector4 lodData6;
        public Vector4 lodData7;
        public uint indirectArgsOffset0;
        public uint indirectArgsCount0;
        public uint indirectArgsOffset1;
        public uint indirectArgsCount1;
        public uint indirectArgsOffset2;
        public uint indirectArgsCount2;
        public uint indirectArgsOffset3;
        public uint indirectArgsCount3;
        public uint indirectArgsOffset4;
        public uint indirectArgsCount4;
        public uint indirectArgsOffset5;
        public uint indirectArgsCount5;
        public uint indirectArgsOffset6;
        public uint indirectArgsCount6;
        public uint indirectArgsOffset7;
        public uint indirectArgsCount7;

        public void SetLods(Vector4[] lodData, uint[] indirectArgsPerLodOffset, uint[] indirectArgsPerLodCount)
        {
            this.lodData0 = lodCount > 0 ? lodData[0] : Vector4.zero;
            this.lodData1 = lodCount > 1 ? lodData[1] : Vector4.zero;
            this.lodData2 = lodCount > 2 ? lodData[2] : Vector4.zero;
            this.lodData3 = lodCount > 3 ? lodData[3] : Vector4.zero;
            this.lodData4 = lodCount > 4 ? lodData[4] : Vector4.zero;
            this.lodData5 = lodCount > 5 ? lodData[5] : Vector4.zero;
            this.lodData6 = lodCount > 6 ? lodData[6] : Vector4.zero;
            this.lodData7 = lodCount > 7 ? lodData[7] : Vector4.zero;

            this.indirectArgsOffset0 = lodCount > 0 ? indirectArgsPerLodOffset[0] : 0;
            this.indirectArgsOffset1 = lodCount > 1 ? indirectArgsPerLodOffset[1] : 0;
            this.indirectArgsOffset2 = lodCount > 2 ? indirectArgsPerLodOffset[2] : 0;
            this.indirectArgsOffset3 = lodCount > 3 ? indirectArgsPerLodOffset[3] : 0;
            this.indirectArgsOffset4 = lodCount > 4 ? indirectArgsPerLodOffset[4] : 0;
            this.indirectArgsOffset5 = lodCount > 5 ? indirectArgsPerLodOffset[5] : 0;
            this.indirectArgsOffset6 = lodCount > 6 ? indirectArgsPerLodOffset[6] : 0;
            this.indirectArgsOffset7 = lodCount > 7 ? indirectArgsPerLodOffset[7] : 0;

            this.indirectArgsCount0 = lodCount > 0 ? indirectArgsPerLodCount[0] : 0;
            this.indirectArgsCount1 = lodCount > 1 ? indirectArgsPerLodCount[1] : 0;
            this.indirectArgsCount2 = lodCount > 2 ? indirectArgsPerLodCount[2] : 0;
            this.indirectArgsCount3 = lodCount > 3 ? indirectArgsPerLodCount[3] : 0;
            this.indirectArgsCount4 = lodCount > 4 ? indirectArgsPerLodCount[4] : 0;
            this.indirectArgsCount5 = lodCount > 5 ? indirectArgsPerLodCount[5] : 0;
            this.indirectArgsCount6 = lodCount > 6 ? indirectArgsPerLodCount[6] : 0;
            this.indirectArgsCount7 = lodCount > 7 ? indirectArgsPerLodCount[7] : 0;
        }
                
        public PrefabData(
            uint batchIndex,
            uint indexBufferStartOffset,
            uint maxCount,
            uint lodCount,
            uint fadeLods,
            Vector4 densityInDistance,
            Vector4[] lodData,
            uint[] indirectArgsPerLodOffset,
            uint[] indirectArgsPerLodCount
          )
        {
            this.batchIndex = batchIndex;
            this.indexBufferStartOffset = indexBufferStartOffset;
            this.maxCount = maxCount;
            this.lodCount = lodCount;
            this.fadeLods = fadeLods;
            this.densityInDistance = densityInDistance; 

            this.lodData0 = lodCount > 0 ? lodData[0] : Vector4.zero;
            this.lodData1 = lodCount > 1 ? lodData[1] : Vector4.zero;
            this.lodData2 = lodCount > 2 ? lodData[2] : Vector4.zero;
            this.lodData3 = lodCount > 3 ? lodData[3] : Vector4.zero;
            this.lodData4 = lodCount > 4 ? lodData[4] : Vector4.zero;
            this.lodData5 = lodCount > 5 ? lodData[5] : Vector4.zero;
            this.lodData6 = lodCount > 6 ? lodData[6] : Vector4.zero;
            this.lodData7 = lodCount > 7 ? lodData[7] : Vector4.zero;

            this.indirectArgsOffset0 = lodCount > 0 ? indirectArgsPerLodOffset[0] : 0;
            this.indirectArgsOffset1 = lodCount > 1 ? indirectArgsPerLodOffset[1] : 0;
            this.indirectArgsOffset2 = lodCount > 2 ? indirectArgsPerLodOffset[2] : 0;
            this.indirectArgsOffset3 = lodCount > 3 ? indirectArgsPerLodOffset[3] : 0;
            this.indirectArgsOffset4 = lodCount > 4 ? indirectArgsPerLodOffset[4] : 0;
            this.indirectArgsOffset5 = lodCount > 5 ? indirectArgsPerLodOffset[5] : 0;
            this.indirectArgsOffset6 = lodCount > 6 ? indirectArgsPerLodOffset[6] : 0;
            this.indirectArgsOffset7 = lodCount > 7 ? indirectArgsPerLodOffset[7] : 0;

            this.indirectArgsCount0 = lodCount > 0 ? indirectArgsPerLodCount[0] : 0;
            this.indirectArgsCount1 = lodCount > 1 ? indirectArgsPerLodCount[1] : 0;
            this.indirectArgsCount2 = lodCount > 2 ? indirectArgsPerLodCount[2] : 0;
            this.indirectArgsCount3 = lodCount > 3 ? indirectArgsPerLodCount[3] : 0;
            this.indirectArgsCount4 = lodCount > 4 ? indirectArgsPerLodCount[4] : 0;
            this.indirectArgsCount5 = lodCount > 5 ? indirectArgsPerLodCount[5] : 0;
            this.indirectArgsCount6 = lodCount > 6 ? indirectArgsPerLodCount[6] : 0;
            this.indirectArgsCount7 = lodCount > 7 ? indirectArgsPerLodCount[7] : 0;
        }
    }
}