TerrainMod

TerrainMod.cs

using GameCommon.Models;
using ProtoBuf;
using System;
using System.Collections.Generic;
using Unity.Mathematics;

namespace GameCommon.Features.Land
{
    [Serializable]
    [ProtoContract]
    public struct TerrainMod
    {
        [ProtoMember(1)]
        public float2 WorldPosition;
        [ProtoMember(2)]
        public float Height;
        [ProtoMember(3)]
        public TerrainSplatWeights Splat0;
        [ProtoMember(4)]
        public TerrainSplatWeights Splat1;

        public int Key
        {
            get
            {
                return (int)math.hash(WorldPosition);
            }
        }

    }

    [Serializable]
    [ProtoContract]
    public struct TerrainSplatWeights
    {
        [ProtoMember(1)]
        public byte r;
        [ProtoMember(2)]
        public byte g;
        [ProtoMember(3)]
        public byte b;
        [ProtoMember(4)]
        public byte a;

        public static TerrainSplatWeights FromFloat4(float4 value)
        {
            return new TerrainSplatWeights
            {
                r = ToByte(value.x),
                g = ToByte(value.y),
                b = ToByte(value.z),
                a = ToByte(value.w)
            };
        }

        public static byte ToByte(float value)
        {
            value = math.min(value, 1f);
            return (byte)math.floor((value * 100f));
        }

        public static float4x2 Normalize(TerrainSplatWeights w0, TerrainSplatWeights w1)
        {
            float sum = w0.Sum + w1.Sum;
            if (sum == 0f)
            {
                return default;
            }

            float ratio = 1f / sum;
            float4 v0 = w0.AsFloat4;
            float4 v1 = w1.AsFloat4;

            v0.x *= ratio;
            v0.y *= ratio;
            v0.z *= ratio;
            v0.w *= ratio;

            v1.x *= ratio;
            v1.y *= ratio;
            v1.z *= ratio;
            v1.w *= ratio;


            return new float4x2(v0, v1);
        }

        public float4 Normalize()
        {
            float sum = Sum;
            if (sum == 0f)
            {
                return default;
            }

            float ratio = 1f / sum;
            float4 v0 = AsFloat4;

            v0.x *= ratio;
            v0.y *= ratio;
            v0.z *= ratio;
            v0.w *= ratio;

            return v0;
        }

        public float Sum
        {
            get
            {
                float4 value = AsFloat4;
                return value.x + value.y + value.z + value.w;
            }
        }

        public float4 AsFloat4
        {
            get
            {
                return new float4(math.min(r / 100f, 1f), math.min(g / 100f, 1f), math.min(b / 100f, 1f), math.min(a / 100f, 1f));
            }
        }

        public override string ToString()
        {
            return string.Format("{0}.{1}.{2}.{3}", r, g, b, a);
        }
    }

   
}