Я пытаюсь сделать игру, в которой я отскакиваю от земли мяч, который изображен в виде замкнутой кривой (зеленая часть), я просто не знаю, как бы я рассчитал столкновение между мячом и кривая.
Я нарисовал и шарик, и кривую, используя графику в графическом окне, я думаю, что мне нужно сделать это математически, поскольку я не могу найти встроенную функциональность в Visual Basic, которая позволяет мне это делать.
Мой код:
Public Class Form1
Dim BallSpeedY, BallSpeedX As Double
Dim BallLoc As Point
Dim Start As Boolean = False
Dim gameTime As Decimal = 60.1
Dim gameTimeFont As New Font("Arial", 24, FontStyle.Bold)
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.WindowState = FormWindowState.Maximized
'Size of the picturebox that is being drawn on
PictureBox1.Width = Me.Width
PictureBox1.Height = Me.Height - 24
DrawGame(False, False, True)
End Sub
Private Sub DrawGame(refreshMap As Boolean, drawBall As Boolean, drawTime As Boolean)
Dim g As Graphics = Graphics.FromImage(PictureBox1.Image)
Static startcornerpt As PointF
Static firstpt As PointF
Static pt2 As PointF
Static pt3 As PointF
Static pt4 As PointF
Static pt5 As PointF
Static lastpt As PointF
Static Endcornerpt As PointF
' Clears the window
g.Clear(Color.White)
If refreshMap Then
Randomize() ' The rnd seed would always be the same if this is not done
' Creates 5 points chosen at random positions on the window within certain parameters
startcornerpt = New PointF(0, Me.Height)
pt2 = New PointF(Me.Width * 0.2, Me.Height * ((39 * Rnd() + 30) / 100))
firstpt = New PointF(0, pt2.Y * 0.5 * 2)
pt3 = New PointF(Me.Width * 0.4, Me.Height * ((39 * Rnd() + 30) / 100))
pt4 = New PointF(Me.Width * 0.6, Me.Height * ((39 * Rnd() + 30) / 100))
pt5 = New PointF(Me.Width * 0.8, Me.Height * ((39 * Rnd() + 30) / 100))
lastpt = New PointF(Me.Width, pt5.Y * 0.5 * 2)
Endcornerpt = New PointF(Me.Width, Me.Height)
End If
' Draws the map with the 5 points
Dim curvepoints As PointF() = {startcornerpt, firstpt, pt2, pt3, pt4, pt5, lastpt, Endcornerpt}
g.FillClosedCurve(Brushes.PaleGreen, curvepoints)
If drawBall Then
' Draws the ball
g.DrawEllipse(Pens.Blue, BallLoc.X, BallLoc.Y, 20, 20)
g.FillEllipse(Brushes.Blue, BallLoc.X, BallLoc.Y, 20, 20)
' Accelerates speed
BallSpeedY = BallSpeedY - 1
' Update position
BallLoc = New Point(BallLoc.X + BallSpeedX, BallLoc.Y - BallSpeedY)
End If
If drawTime Then
gameTime = gameTime - 0.1
gameTime.ToString()
g.DrawString(gameTime, gameTimeFont, Brushes.Black, Me.Width / 2 - 120, Me.Height * 0.025) ' Draws the gametime on screen,
' Width is set to be around the middle of the screen while height is just under the strip menu.
End If
PictureBox1.Refresh()
End Sub
Private Sub StartToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles StartToolStripMenuItem.Click
If Start = False Then
gameTime = 60.1
'Resets ball for testing
BallLoc.X = 800
BallLoc.Y = 300
BallSpeedY = 0
'Starts the timers
Gravity.Start()
Movement.Start()
Start = True
ElseIf Start = True Then
' Resets the ball
Dim ballloc As New Point(800, 300)
Gravity.Stop()
Movement.Stop()
Start = False
End If
End Sub
Private Sub NewMapToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles NewMapToolStripMenuItem.Click
' Creates a new map
DrawGame(True, False, False)
Start = False
End Sub
Private Sub Movement_Tick(sender As Object, e As EventArgs) Handles Movement.Tick
' Starts movement of the ball
DrawGame(False, True, True)
End Sub
End Class
РЕДАКТИРОВАТЬ: Collision теперь работает со следующими дополнениями:
Dim wider = CType(ground.Clone(), GraphicsPath)
Using widenizer As Pen = New Pen(Color.Black, ballDiameter)
wider.Widen(widenizer)
End Using
И
If ground.IsVisible(BallLoc) OrElse wider.IsVisible(BallLoc) Then
BallSpeedY = BallSpeedY + 50 ' rebound on collision
End If