void Start()
{
m_TopLeftPos = transform.parent.Find("TopLeftPos").position;
m_BottomDownPos = transform.parent.Find("BottomDownPos").position;
float Left = m_TopLeftPos.x;
float Width = m_BottomDownPos.x - m_TopLeftPos.x;
float Top = m_TopLeftPos.y;
float Bottom = m_BottomDownPos.y;
int nodeCount = Mathf.RoundToInt(Width) / 2;
m_Mass = 1;
m_BaseHeight = Top;
for (int i = 0; i < nodeCount; i++)
{
FluidNode node = new FluidNode();
node.m_LeftTopPos = new Vector2(Left + Width * i / nodeCount, Top);
node.m_BottomDownPos = new Vector2(Left + Width * (i + 1) / nodeCount, Bottom);
node.m_Acceleration = Vector2.zero;
node.m_Velocity = Vector2.zero;
node.m_Mesh = new Mesh();
Vector3[] vertices = new Vector3[4];
vertices[0] = new Vector3(node.m_LeftTopPos.x, node.m_LeftTopPos.y, 0);
vertices[1] = new Vector3(node.m_BottomDownPos.x, node.m_LeftTopPos.y, 0);
vertices[2] = new Vector3(node.m_LeftTopPos.x, node.m_BottomDownPos.y, 0);
vertices[3] = new Vector3(node.m_BottomDownPos.x, node.m_BottomDownPos.y, 0);
Vector2[] texCoords = new Vector2[4];
texCoords[0] = new Vector2(0, 1);
texCoords[1] = new Vector2(1, 1);
texCoords[2] = new Vector2(0, 0);
texCoords[3] = new Vector2(1, 0);
int[] indices = new int[6] {
0, 1, 3, 3, 2, 0
};
node.m_Mesh.vertices = vertices;
node.m_Mesh.uv = texCoords;
node.m_Mesh.triangles = indices;
node.m_MeshObject = Instantiate(m_FluidMesh, Vector3.zero, Quaternion.identity) as GameObject;
node.m_MeshObject.GetComponent <MeshFilter>().mesh = node.m_Mesh;
node.m_MeshObject.transform.parent = transform;
//node.m_MeshObject.transform.position = new Vector3((node.m_LeftTopPos.x + node.m_BottomDownPos.x) / 2,
// (node.m_LeftTopPos.y + node.m_BottomDownPos.y) / 2, 0);
node.m_MeshObject.AddComponent <BoxCollider2D>();
node.m_MeshObject.GetComponent <BoxCollider2D>().isTrigger = true;
node.m_MeshObject.AddComponent <FluidCollision>();
m_Fluid.Add(node);
}
}
public void Wave(float xpos, float velocity)
{
;
if (xpos >= m_Fluid[0].m_LeftTopPos.x && xpos <= m_Fluid[m_Fluid.Count - 1].m_BottomDownPos.x)
{
xpos -= m_Fluid[0].m_LeftTopPos.x;
int index = Mathf.RoundToInt(m_Fluid.Count * (xpos / (m_Fluid[m_Fluid.Count - 1].m_LeftTopPos.x - m_Fluid[0].m_LeftTopPos.x)));
FluidNode node = m_Fluid[index];
node.m_Velocity += new Vector2(0, velocity);
m_Fluid[index] = node;
}
}
void Update()
{
// 实现碰撞到的水面的阻尼运动
for (int i = 0; i < m_Fluid.Count; i++)
{
Vector2 force = new Vector2(0, m_Spring * (m_Fluid[i].m_LeftTopPos.y - m_BaseHeight)) + m_Fluid[i].m_Velocity * m_Damping;
FluidNode node = m_Fluid[i];
node.m_Acceleration = -force / m_Mass;
node.m_LeftTopPos = new Vector2(node.m_LeftTopPos.x, node.m_LeftTopPos.y + node.m_Velocity.y);
node.m_Velocity += node.m_Acceleration;
m_Fluid[i] = node;
}
// 碰撞到的水面带动附近的水面一起运动
for (int i = 0; i < m_Fluid.Count; i++)
{
if (i > 0)
{
FluidNode node = m_Fluid[i];
node.m_LeftHeightDiff = m_Spread * (m_Fluid[i].m_LeftTopPos.y - m_Fluid[i - 1].m_LeftTopPos.y);
m_Fluid[i] = node;
node = m_Fluid[i - 1];
node.m_Velocity = node.m_Velocity + new Vector2(0, m_Fluid[i].m_LeftHeightDiff);
m_Fluid[i - 1] = node;
}
if (i < m_Fluid.Count - 1)
{
FluidNode node = m_Fluid[i];
node.m_RightHeightDiff = m_Spread * (m_Fluid[i].m_LeftTopPos.y - m_Fluid[i + 1].m_LeftTopPos.y);
m_Fluid[i] = node;
node = m_Fluid[i + 1];
node.m_Velocity = node.m_Velocity + new Vector2(0, m_Fluid[i].m_RightHeightDiff);
m_Fluid[i + 1] = node;
}
}
for (int i = 0; i < m_Fluid.Count; i++)
{
if (i > 0)
{
FluidNode node = m_Fluid[i - 1];
node.m_LeftTopPos = new Vector2(node.m_LeftTopPos.x, node.m_LeftTopPos.y + m_Fluid[i].m_LeftHeightDiff);
m_Fluid[i - 1] = node;
}
if (i < m_Fluid.Count - 1)
{
FluidNode node = m_Fluid[i + 1];
node.m_LeftTopPos = new Vector2(node.m_LeftTopPos.x, node.m_LeftTopPos.y + m_Fluid[i].m_RightHeightDiff);
m_Fluid[i + 1] = node;
}
}
for (int i = 0; i < m_Fluid.Count; i++)
{
Vector3[] vertices = new Vector3[4];
vertices[0] = new Vector3(m_Fluid[i].m_LeftTopPos.x, m_Fluid[i].m_LeftTopPos.y, 0);
vertices[1] = new Vector3(m_Fluid[i].m_BottomDownPos.x, m_Fluid[i].m_LeftTopPos.y, 0);
vertices[2] = new Vector3(m_Fluid[i].m_LeftTopPos.x, m_Fluid[i].m_BottomDownPos.y, 0);
vertices[3] = new Vector3(m_Fluid[i].m_BottomDownPos.x, m_Fluid[i].m_BottomDownPos.y, 0);
m_Fluid[i].m_Mesh.vertices = vertices;
}
}
