81 lines
2.8 KiB
C#
81 lines
2.8 KiB
C#
using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using ArchimedsLab;
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[RequireComponent(typeof(MeshFilter))]
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public class FloatingGameEntityFlat : GameEntity
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{
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public Mesh buoyancyMesh;
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/* These 4 arrays are cache array, preventing some operations to be done each frame. */
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tri[] _triangles;
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tri[] worldBuffer;
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tri[] wetTris;
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tri[] dryTris;
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//These two variables will store the number of valid triangles in each cache arrays. They are different from array.Length !
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uint nbrWet, nbrDry;
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protected override void Awake()
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{
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base.Awake();
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//By default, this script will take the render mesh to compute forces. You can override it, using a simpler mesh.
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Mesh m = buoyancyMesh == null ? GetComponent<MeshFilter>().mesh : buoyancyMesh;
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//Setting up the cache for the game. Here we use variables with a game-long lifetime.
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WaterCutter.CookCache(m, ref _triangles, ref worldBuffer, ref wetTris, ref dryTris);
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}
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protected override void FixedUpdate()
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{
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base.FixedUpdate();
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if (rb.IsSleeping())
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return;
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/* It's strongly advised to call these in the FixedUpdate function to prevent some weird behaviors */
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//This will prepare static cache, modifying vertices using rotation and position offset.
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WaterCutter.CookMesh(transform.position, transform.rotation, ref _triangles, ref worldBuffer);
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/*
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Now mesh ae reprensented in World position, we can split the mesh, and split tris that are partially submerged.
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Here I use a very simple water model, already implemented in the DLL.
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You can give your own. See the example in Examples/CustomWater.
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*/
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WaterCutter.SplitMesh(worldBuffer, ref wetTris, ref dryTris, out nbrWet, out nbrDry, WaterSurface.flatWater);
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//This function will compute the forces depending on the triangles generated before.
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Archimeds.ComputeAllForces(wetTris, dryTris, nbrWet, nbrDry, speed, rb);
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}
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#if UNITY_EDITOR
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//Some visualizations for this buyoancy script.
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protected override void OnDrawGizmos()
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{
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base.OnDrawGizmos();
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if(!Application.isPlaying)
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return;
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Gizmos.color = Color.blue;
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for(uint i = 0 ; i < nbrWet ; i++)
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{
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Gizmos.DrawLine(wetTris[i].a, wetTris[i].b);
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Gizmos.DrawLine(wetTris[i].b, wetTris[i].c);
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Gizmos.DrawLine(wetTris[i].a, wetTris[i].c);
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}
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Gizmos.color = Color.yellow;
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for (uint i = 0; i < nbrDry; i++)
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{
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Gizmos.DrawLine(dryTris[i].a, dryTris[i].b);
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Gizmos.DrawLine(dryTris[i].b, dryTris[i].c);
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Gizmos.DrawLine(dryTris[i].a, dryTris[i].c);
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}
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}
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#endif
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}
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