这两天为了用户体验加了一个撒花的效果,记录如下:
基本逻辑:准备一些小的图片,备用!然后新建一个窗体,设置为透明模式,然后加一个定时器,一个list列表(用于存储多个图片的位置,下降速度,旋转角度),在定时器中,随机选取图片,计算(随机)下降速度,旋转角度,计算当前的位置 存到list中。然后将list中的所有图片绘制到一个bitmap上,然后更新到界面上即可!
代码如下,有需要的可以参考:
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace 撒花特效
{
public partial class Form1 : Form
{
private static readonly Random rand = new Random();
private readonly List<SnowFlake> SnowFlakes = new List<SnowFlake>();
private int Tick = 0;
private class SnowFlake
{
public float Rotation;//旋转角度
public float RotVelocity;//旋转速率
public float Scale;//图像缩放比例
public float X;//X坐标值
public float XVelocity;//X改变速率
public float Y;//Y坐标值
public float YVelocity;//Y改变速率
public int type = 0;//图像类型
//0 普通图像,1 不旋转图像,2 只下降的图像
public Image image;//源图像
}
System.Media.SoundPlayer sndPlayer;
private Boolean on = true;
Image screenImage;
public Form1()
{
InitializeComponent();
SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true);
}
private void SetBackground(Image img)
{
try
{
Bitmap bitmap = (Bitmap)img;
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new ApplicationException();
}
IntPtr hObject = IntPtr.Zero;
IntPtr zero = IntPtr.Zero;
IntPtr hDC = Win32.GetDC(IntPtr.Zero);
IntPtr ptr2 = Win32.CreateCompatibleDC(hDC);
try
{
hObject = bitmap.GetHbitmap(Color.FromArgb(0));
zero = Win32.SelectObject(ptr2, hObject);
Win32.Size size2 = new Win32.Size(bitmap.Width, bitmap.Height);
Win32.Size psize = size2;
Win32.Point point3 = new Win32.Point(0, 0);
Win32.Point pprSrc = point3;
point3 = new Win32.Point(base.Left, base.Top);
Win32.Point pptDst = point3;
Win32.BLENDFUNCTION pblend = new Win32.BLENDFUNCTION();
pblend.BlendOp = 0;
pblend.BlendFlags = 0;
pblend.SourceConstantAlpha = 0xff;
pblend.AlphaFormat = 1;
Win32.UpdateLayeredWindow(this.Handle, hDC, ref pptDst, ref psize, ptr2, ref pprSrc, 0, ref pblend, 2);
}
catch (Exception exception1)
{
Exception exception = exception1;
throw exception;
}
finally
{
Win32.ReleaseDC(IntPtr.Zero, hDC);
if (hObject != IntPtr.Zero)
{
Win32.SelectObject(ptr2, zero);
Win32.DeleteObject(hObject);
}
Win32.DeleteDC(ptr2);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
protected override System.Windows.Forms.CreateParams CreateParams
{
get
{
System.Windows.Forms.CreateParams createParams = base.CreateParams;
createParams.ExStyle |= 0x80000;
return createParams;
}
}
private void timer_Tick(object sender, EventArgs e)
{
Tick++;
if (Tick % 2 == 0)
{
if (Tick < 200)
{
SnowFlake s = new SnowFlake();
Random rd = new Random();
int ran;//随机图像加载
s.X = rand.Next(-20, this.Width + 20);//在水平方向随机产生一个位置
s.Y = 0;//从顶部出现
s.XVelocity = (float)(rand.NextDouble() – 0.5f) * 2f;//随机产生水平漂移速度
s.YVelocity = rand.Next(3) + 5 ; //(float)(rand.NextDouble() * 5.5) + 1f;//随机产生垂直变换速度
s.Rotation = rand.Next(0, 359);//随机产生旋转初始角度
s.RotVelocity = rand.Next(-2, 2);//随机产生旋转变换角速率
if (Tick % 1000 == 0)
{
ran = 6;
s.type = 2;
}
else
{
ran = rd.Next(100) % 9 + 1;
if (ran == 5)//不支持旋转
s.type = 1;
}
s.image = Image.FromFile(AppDomain.CurrentDomain.BaseDirectory + “\\” + ran + “.png”);//加载图像
if (s.RotVelocity == 0)
{
s.RotVelocity = 2;
}
s.Scale = (float)(rand.NextDouble() / 2) + 0.75f;//随机产生放缩比例
SnowFlakes.Add(s);
}
}
//这里做了控制,图片全部消失后,关闭窗口
if (Tick > 5 && SnowFlakes.Count == 0)
{
timer1.Stop();
this.Close();
}
Graphics g = Graphics.FromImage(screenImage);
g.Clear(Color.Transparent);
g.SmoothingMode = SmoothingMode.HighSpeed;
for (int i = 0; i < SnowFlakes.Count; i++)
{
SnowFlake s1 = SnowFlakes[i];
if (s1.type != 2)
s1.X += s1.XVelocity;//水平漂移
s1.Y += s1.YVelocity;//垂直漂移
if (s1.type == 0)
s1.Rotation += s1.RotVelocity;//旋转
else
s1.Rotation = 0;
s1.XVelocity += ((float)rand.NextDouble() – 0.5f) * 0.7f;//刷新水平速率
s1.XVelocity = Math.Max(s1.XVelocity, -2f);
s1.XVelocity = Math.Min(s1.XVelocity, +2f);
if (s1.Y > this.Height)//若元素下降到底部,销毁此元素
{
SnowFlakes.RemoveAt(i);
}
else
{
g.ResetTransform();
g.TranslateTransform(-16, -16, MatrixOrder.Append); //pan
g.ScaleTransform(s1.Scale, s1.Scale, MatrixOrder.Append); //scale
g.RotateTransform(s1.Rotation, MatrixOrder.Append); //rotate
g.TranslateTransform(s1.X, s1.Y, MatrixOrder.Append); //pan
g.DrawImage(s1.image, 0, 0); //draw
}
}
g.Dispose();
SetBackground(screenImage);
}
private void Form1_Load_1(object sender, EventArgs e)
{
screenImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
// //播放声音
sndPlayer = new System.Media.SoundPlayer(Application.StartupPath + @”/9347.wav”);
sndPlayer.PlayLooping();
timer1.Tick += timer_Tick;
}
}
}
源码已经上传:https://download.csdn.net/download/yunxiaobaobei/12691236
参考文章:http://blog.sina.com.cn/s/blog_9be6dec101011q5q.html#cmt_51A845CD-7F000001-6ADEC17E-87C-8A0
版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 举报,一经查实,本站将立刻删除。
文章由极客之音整理,本文链接:https://www.bmabk.com/index.php/post/51839.html