private Bounds ViewportBounds()
{
/*
* 获取当前植物的所有对象
* 逐个遍历
* 将对象的顶点坐标（世界坐标系下）转换成视窗坐标（viewport 以左下角为原点(0, 0)， 右上角为(1, 1)的坐标系）
* 根据视窗坐标最大最小值生成包围盒
* 用于确定当前对象在视窗中的位置，便于相机调整其自身位置
* 使视点合适
*/
List <GameObject> objects = new List <GameObject>();
foreach (TreeModel treeModel in LScene.GetInstance().TreeModels)
{
objects.AddRange(GameObjectOperation.GetGameObjects(treeModel.TreeModelInstance));
}
Vector3 max = Vector3.zero, min = Vector3.zero;
/*
* 判断是否初始化 max 和 min
*/
bool flag = true;
foreach (GameObject _object in objects)
{
//无顶点
if (!GameObjectValidate.HavaVertices(_object))
{
continue;
}
Vector3[] vertices = GameObjectOperation.GetVerticesInWorld(_object);
foreach (Vector3 vertex in vertices)
{
Vector3 viewport = mainCamera.WorldToViewportPoint(vertex);
if (flag)
{
max = viewport; min = viewport; flag = false; continue;
}
else
{
max = Vector3.Max(max, viewport);
min = Vector3.Min(min, viewport);
}
}
}
Bounds bounds = new Bounds((max + min) / 2.0f, max - min);
return(bounds);
}
private void ComputeAnimationFragment()
{
/*
* 初始化动画片段
* 防止数据重复
*/
InitialAnimationFragment();
InitialWormholeFragment();
/*
* 调整前后两关键帧顶点
* 保证前后两关键帧顶点个数相同
* 方便后续计算顶点的移动
*/
AdjustTree();
for (int i = 0; i < m_PreGameObjects.Count; i++)
{
/*
* 检验两个对象的Tag
* 保证两个对象的Tag一致
*/
GameObjectValidate.ValidateTagOfObject(m_PreGameObjects[i], m_CurGameObjects[i]);
/*
* 判断该组对象是否有顶点
* 因调整后，前后两对象顶点个数相同
* 故判断前一个对象是否有顶点即可
*/
if (!GameObjectValidate.HavaVertices(m_PreGameObjects[i]))
{
m_AnimationFragment.Add(new List <Vector3>());
m_WormholeFragment.Add(new WormholeFragment());
continue;
}
//ComputeAnimationFragment(GameObjectOperation.GetVerticesInWorld(m_PreGameObjects[i]), GameObjectOperation.GetVerticesInWorld(m_CurGameObjects[i]));
ComputeAnimationFragment(m_PreGameObjects[i], GameObjectOperation.GetVertices(m_PreGameObjects[i]), GameObjectOperation.GetVerticesInWorld(m_CurGameObjects[i]));
ComputeWormholeFragment(m_PreGameObjects[i], m_CurGameObjects[i]);
}
}
private Vector3 RecordBranchModel(BranchIndex index, Vector3 bottom)
{
/*
* 计算形态数据
* 根据形态数据即可绘制对应的GameObject
*/
index.MorphologicalSim();
if (cylinderObject.activeSelf)
{
cylinderObject.SetActive(false);
}
cylinderObject.transform.localRotation = Quaternion.Euler(Vector3.zero);
cylinderObject.transform.position = bottom + new Vector3(0, index.Length / 2f, 0) * SCALE; //该节间的中心位置
cylinderObject.transform.localScale = new Vector3(index.Radius / DEFAULT_RADIUS, index.Length / DEFAULT_HEIGHT, index.Radius / DEFAULT_RADIUS) * SCALE; //尺寸
RotationGameObject(cylinderObject, bottom, index.Rotation); //旋转该圆柱体
Vector3[] vertices = GameObjectOperation.GetVerticesInWorld(cylinderObject);
Vector2[] uv = GameObjectOperation.GetUV(cylinderObject);
if (temp_Vertices.Count == 0) //最底端的节间
{
for (int i = 0; i < 40; i++)
{
temp_Vertices.Add(vertices[i]);
temp_UV.Add(uv[i]);
}
AddTriangles(0, 20);
}
else //非最底端节间
{
for (int i = 0; i < 20; i++)
{
/*
* 添加顶点
* 由于底端的顶点与前驱节间的顶点相同
* 故只用添加后20个顶点即可
*/
temp_Vertices.Add(vertices[i + 20]);
/*
* 添加UV坐标
* 需要颠倒纹理（与上一个节间的纹理相反）
* 确保连接处的纹理过渡不会突兀
*/
temp_UV.Add(temp_UV[index.Previous.TopVerticesIndex - 20 + i]);
}
AddTriangles(index.Previous.TopVerticesIndex, temp_Vertices.Count - 20);
}
//删除GameObject，防止重复
//GameObject.Destroy(cylinderObject);
/*
* 补齐index的数据
* 用于后续生成节间
*/
index.BottomVerticesIndex = index.Previous.TopVerticesIndex == -1 ?
0 : index.Previous.TopVerticesIndex;
index.TopVerticesIndex = temp_Vertices.Count - 20;
/*
* 返回当前顶端的中心位置
* 由于枝干旋转，故根据顶端的顶点位置计算
*/
return(GetCenterPoint(index.TopVerticesIndex, temp_Vertices));
}