/// <summary>
/// 计算叶片面积（Unity单位）
/// </summary>
private double ComputeLeafArea(GameObject meshModel)
{
Texture2D texture = GameObjectOperation.GetTexture(meshModel.transform.GetChild(0).gameObject) as Texture2D;
VisualPixelCount = 0;
PixelCount = texture.width * texture.height; //总像素个数
//统计非透明像素个数
for (int x = 0; x < texture.width; x++)
{
for (int y = 0; y < texture.height; y++)
{
if (texture.GetPixel(x, y).a > 0)
{
VisualPixelCount++;
}
}
}
VisibilityRatio = VisualPixelCount * 1.0f / PixelCount;
UniformMeshArea = GameObjectOperation.GetOrganArea(meshModel.transform.GetChild(0).gameObject) *
MaizeParams.SCALE * MaizeParams.SCALE; //㎡
//获取该模型的面积，并乘以非透明像素所占百分比即得叶片面积
return(UniformMeshArea * VisibilityRatio);
}
private void LeafMorphologicalInheritance()
{
OrganMorphologicalInheritance(); //基类中的数据继承
LeafIndex curLeafIndex = CurIndex as LeafIndex;
LeafIndex preLeafIndex = PreIndex as LeafIndex;
curLeafIndex.Width = preLeafIndex.Width;
curLeafIndex.LeafArea = preLeafIndex.LeafArea;
curLeafIndex.LeafArea_Uninsected = preLeafIndex.LeafArea_Uninsected;
curLeafIndex.LimitRatio = preLeafIndex.LimitRatio;
curLeafIndex.Texture_PreDay = GameObjectOperation.GetTexture(preLeafIndex.Belong);
curLeafIndex.MeshHashCode_PreDay = preLeafIndex.LeafMesh.GetHashCode();
}
private void ClearAllWormholeTex()
{
if (m_listOrganModels == null)
{
return;
}
foreach (GameObject OrganModel in m_listOrganModels)
{
Texture tex = GameObjectOperation.GetTexture(OrganModel);
if (tex.name == "Wormhole Texture")
{
GameObjectOperation.ClearTexture(OrganModel);
GameObject.DestroyObject(tex);
}
}
}
/// <summary>
/// 射线与三角形求交（有纹理）
/// </summary>
public static bool IntersectRayTriangleWithTexture(Ray _Ray, Triangle _Triangle, out float Distance)
{
float u, v;
if (!IntersectRayTriangleWithoutTexture(_Ray, _Triangle, out u, out v, out Distance))
{
return(false); //射线与面片无交点
}
Vector2 UV = _Triangle.GetUV(u, v); //获取该交点的UV坐标
Texture2D Texture = GameObjectOperation.GetTexture(_Triangle.Index.Belong) as Texture2D; //获取纹理
if (Texture.GetPixelBilinear(UV.x, UV.y).a > 0f) //获取该点的透明度，如果大于0.5则有碰撞
{
return(true);
}
else
{
return(false);
}
}
private Texture GetWormholeTex(double actualInsectIntake, out int threshold)
{
/*
* 阈值
* 用于后续关键帧动画中虫洞的模拟
* 当为0时表示虫洞未发生变化
*/
threshold = 0;
/*
* 存在的各种情况：
* 1、该叶片不受病虫影响
* 1.1、该叶片原先无病虫害，故现在也无病虫害，即叶面积（LeafArea）与未受病虫害的叶面积（LeafArea_Uninsected）相等
* 故该模型的纹理无需替换
* 1.2、该叶片原先有病虫害，再分两种情况：
* 1.2.1、与昨日的模型相同，即今日模型的哈希值与昨日模型的哈希值相同，故叶片形态、纹理与昨日相同
* 故直接调用昨日模型的纹理即可
* 1.2.2、与昨日的模型不同，即该叶片发育到不同的阶段（成熟或衰老），故调用的纹理与昨日不同
* 故重新生成虫洞纹理
* 2、该叶片受病虫影响
* 形态不同，故直接重新生成虫洞纹理
*/
if (LeafArea == LeafArea_Uninsected)
{
return(null);
}
else if (Texture_PreDay != null &&
actualInsectIntake <= 0 && LeafMesh.GetHashCode() == MeshHashCode_PreDay)
{
return(Texture_PreDay);
}
else
{
if (Texture_PreDay != null && Texture_PreDay.name == "Wormhole Texture")
{
if (LScene.GetInstance().HaveAnimator)
{
GameObjectOperation.DestroyTexWithoutAnimation(Texture_PreDay);
}
else
{
GameObject.Destroy(Texture_PreDay);
}
Texture_PreDay = null;
}
Texture leafTex = GameObjectOperation.GetTexture(Belong);
Texture wormholeTex = CelluarTex.CreateWormhole(InsectedRatio, leafTex, out threshold);
wormholeTex.name = "Wormhole Texture";
/*
* 清除纹理
* 释放内存
*/
if (leafTex.name == "Wormhole Texture")
{
GameObject.DestroyObject(leafTex);
}
return(wormholeTex);
}
}