by Dennis Neal (1 Submission)
Category: Math/Dates
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Tue 3rd July 2001
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Draws a line from XStart, YStart at the angle passed in Degrees. LineLen is the length, and LineColor is the color of the line in QBColor
VBcoders
YStart As Integer, LineLen As Integer, LineColor As Byte)
' Draws a line from XStart, YStart at the angle passed in Degrees.
' LineLen is the length, and LineColor is the color of the line
' in QBColor values from 0 to 15.
' This assumes that zero degrees is up from the center, and
' increasing numbers are in a clockwise direction.
Dim LineXEnd As Integer
Dim LineYEnd As Integer
Dim Radians As Single
Dim PI As Single
PI = 3.141592654
Do Until Degrees < 360
Degrees = Degrees - 360
Loop
Select Case Degrees
Case 0
LineXEnd = XStart
LineYEnd = YStart - LineLen
Case Is > 0 And Degrees < 90
Radians = Degrees * (PI / 180)
LineXEnd = XStart + (Sin(Radians) * LineLen)
LineYEnd = YStart - (Cos(Radians) * LineLen)
Case 90
LineXEnd = XStart + LineLen
LineYEnd = YStart
Case Is > 90 And Degrees < 180
Radians = Degrees * (PI / 180)
LineXEnd = XStart + (Sin(Radians) * LineLen)
LineYEnd = YStart - (Cos(Radians) * LineLen)
Case 180
LineXEnd = XStart
LineYEnd = YStart + LineLen
Case Is > 180 And Degrees < 270
Radians = Degrees * (PI / 180)
LineXEnd = XStart + (Sin(Radians) * LineLen)
LineYEnd = YStart - (Cos(Radians) * LineLen)
Case 270
Radians = Degrees * (PI / 180)
LineXEnd = XStart + (Sin(Radians) * LineLen)
LineYEnd = YStart - (Cos(Radians) * LineLen)
Case Else
Radians = Degrees * (PI / 180)
LineXEnd = XStart + (Sin(Radians) * LineLen)
LineYEnd = YStart - (Cos(Radians) * LineLen)
End Select
Me.Line (XStart, YStart)-(LineXEnd, LineYEnd), QBColor(LineColor)
End Sub
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