Difference between revisions of "QCad/C2/Drawing-Methods-in-QCAD/English-timed"

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{| style="border-spacing:0;"
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{|border=1
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|'''Visual Cue'''
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|'''Time'''
 
|'''Narration'''
 
|'''Narration'''
  
 
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|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Show slide number 1
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| 00:00
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| Hello and welcome back to another QCAD tutorial
  
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(00-00:08)
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|-
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| 00:04
 +
| '''Drawing methods in QCAD''' and knowing coordinate system.
  
 +
|-
 +
|  00:09
 +
| QCAD uses Cartesian co-ordinate system which consists of two numbered scales, called as x-axis, y-axis.
  
 +
|-
 +
|  00:17
 +
| These are perpendicular to each other. These axes divide coordinate system into 4 quadrants.
  
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''0.00 '''Hello and welcome back to another QCAD tutorial.  
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|-
 +
|00:24
 +
|Your work in QCAD will mostly be in quadrant I.
  
 +
|-
 +
|00:27
 +
|The point where these axes meet is called as '''absolute origin''' or the origin point.
  
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'''0.04 '''Drawing methods in QCAD and knowing coordinate system.
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|-
 +
| 00:34
 +
| For this tutorial, I am using the '''GNU Linux operating system Ubuntu''' Version '''10.04 LTS'''  
  
 
|-
 
|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 2
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|00:40
 +
|and '''QCAD Community Edition''' Version '''2.0.5.0'''
  
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(Cartesian coordinate system) (00:09-00:33)
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|-
 +
| 00:46
 +
| In this tutorial, we will see:  
  
 +
|-
 +
|00:48
 +
| '''Cartesian coordinate system'''
  
 +
|-
 +
|00:51
 +
|How to use '''command line''' to draw objects and
  
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''0.09 '''Qcad uses Cartesian co-ordinate system, which consists of two numbered scales, called as x-axis, y-axis.
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|-
 +
|00:53
 +
| different drawing methods available in QCAD.  
  
 +
|-
 +
| 00:56
 +
| Let's first see how to use '''command line''' to put in co-ordinates, to draw points and draw objects of required measurements
  
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'''0.17'''These are perpendicular to each other. These axis do divide coordinate system into 4 quadrants.
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|-
 +
|01:06
 +
|using the Cartesian coordinate system.
  
 +
|-
 +
|01:08
 +
|Please have the '''QCAD application''' open in your system.
  
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'''0.24'''Your work in QCAD will mostly be in quadrant I
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|-
 +
|01:11
 +
| If you want to know how to install QCAD, please refer to the earlier tutorial called 'Introduction to QCAD'
  
 +
|-
 +
|01:18
 +
|which is available on '''spoken-tutorial''' website.
  
−
'''0.27 '''The point where these axis meet is called as absolute origin or the origin point.
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|-
 +
|01:22
 +
|Once the '''application''' is open, from the tool bar on left, choose '''Line''' tool- '''Line with two points'''.
  
 
|-
 
|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 3
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|01:28
 +
|Now focus on the command prompt because we are going to use '''command line''' to put in exact coordinates.
  
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(Lesson Plan)(00:34-00:45).
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|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''0.34 '''For this tutorial, I am using the GNU Linux operating system Ubuntu Version 10.04 LTS
+
|01:35
 +
|It is asking to 'specify first point'. Let's put 10 comma 10.  
  
 +
|-
 +
|01:41
 +
|We always put X-axis value first and then the Y-axis value.
  
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'''0.40 '''and QCAD Community Edition Version 2.0.5.0
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|-
 +
|01:45
 +
|What it is going to do is, it will add a point, 10 units away from X and from Y-axis.
  
 
|-
 
|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Slide number 3
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|01:53
 +
|Hit '''Enter'''. See the point is entered in relation to this origin or '''absolute''' 0, 0
  
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(Lesson Plan)(00:46-00:55)
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|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''0.46 '''In this tutorial we will see
+
|02:00  
 +
|which is 10 units away from X and 10 units away from Y-axis.
  
 +
|-
 +
|02:05
 +
| Now, suppose I want to draw a horizontal line in this direction, going away from this point, say 10 units.
  
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'''0.48 '''Cartesian coordinate system
+
|-
 +
|02:13
 +
|For the next point, I will add 20, 10.  
  
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'''0.51 '''How to use command line to draw objects
+
|-
 +
|02:18
 +
|X-axis value is 20 because this point, the new point, will always be in relation to this absolute zero.
  
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'''0.53 '''and different drawing methods available in QCAD
+
|-
 +
|02:27
 +
|So, to meet the distance of 10, I will have to add 10 units to the earlier point's X-value.
  
 
|-
 
|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 4
+
|02:35
 +
|And Y-value will not change; so, it will be 10 here.
  
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(Drawing methods)
+
|-
 +
|02:40
 +
|Now, if I want to go vertical line downwards again of 10 units,
  
−
(00:56-4:08)
+
|-
 +
|02:46
 +
|for the next point at the command prompt, I will put 20, 0.
  
 +
|-
 +
|02:56
 +
|X-axis value won't change, Y-axis will be 20 units -ve from the earlier value. So, it will be 0.
  
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Switch to QCAD tool->
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|-
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''0.56 '''Let's first see how to use command line to put in co-ordinates to draw points and draw objects of required measurements.
+
|03:05
 +
|Now, again to go horizontal in 9 (nine) O'clock direction, for the next point, I will put (showing on application so pause for 4 sec. 3:11-3:15) 10, 0.
  
 +
|-
 +
|03:20
 +
|Here, Y-axis won't change and X-axis will be -10
  
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'''1.06''' Using the Cartesian coordinate system.
+
|-
 +
|03:26
 +
|in relation to the previously drawn point.
  
 +
|-
 +
|03:29
 +
|Now, to close my drawing I can always put 'c' and hit '''Enter''' or
  
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'''1.08 '''Please have the QCAD application open in your system.
+
|-
 +
|03:35
 +
|I can go back to my original point which was 10, 10
  
 +
|-
 +
|03:39
 +
|and it will close the drawing. This is how you draw using the '''command line input'''.
  
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'''1.11 '''If you want to know how to install QCAD please refer to the earlier tutorial called as 'Introduction to QCAD'.
+
|-
 +
|03:45
 +
|You can draw any drawing by using this coordinate system by adding, subtracting '''absolute co-ordinates''' for any point or vertex between two segments
  
 +
|-
 +
|03:56
 +
|like I did to draw this 10 units.
  
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'''1.18 '''Which is available on spoken-tutorial website.
+
|-
 +
|04:00
 +
|But this is going to be little complicated.
  
 +
|-
 +
|04:03
 +
|Rather QCAD offers three easy methods to draw objects with.
  
−
'''1.22 '''Once the application is open from the tool bar on left choose line tool- line with two points.
+
|-
 +
| 04:09
 +
| First is '''Relative co-ordinates System'''.  
  
 +
|-
 +
|04:12
 +
|It uses coordinates that are relative to the last point designated, rather than a 0,0 point of the drawing area.
  
−
'''1.28 '''Now focus on the command prompt, because we are going to use command line to put in exact coordinates.
+
|-
 +
|04:19
 +
|"@" symbol is used to enter data, using this system.
  
 +
|-
 +
|04:26
 +
|Let's try drawing this previously drawn square, using relative coordinate system.
  
−
'''1.35 '''It is asking to 'specify first point' Let's enter 10 comma 10
+
|-
 +
|04:30
 +
|Let me clear my drawing.
  
 +
|-
 +
|04:35
 +
|Go back to line tool- '''Line with two points'''.
  
−
'''1.41 '''We always add x axis value first and then y axis value.
+
|-
 +
|04:38
 +
|To specify first point, at the command prompt, enter 10,10- again X and Y-axis.
  
 +
|-
 +
|04:46
 +
|It is going to put point at 10,10 distance. For the next point, now that we are using relative system, we have to put '@' symbol.
  
−
'''1.45 '''What it is going to do is, it will add a point 10 units away from x and from y axis.
+
|-
 +
|04:57
 +
|Whenever we want to use relative system '@' symbol is a must.
  
 +
|-
 +
|05:01
 +
|After that, I want to draw horizontal line in 3 O'clock direction of 10 units.
  
−
'''1.53 '''Hit enter. See the point is entered in relation to this origin or absolute 0, 0
+
|-
 +
|05:08
 +
|So, X value is 10. So, I put @10,0 because Y value is zero here.
  
 +
|-
 +
|05:16
 +
|Now, for the vertical line going in downward direction, again for relative I use '@'.
  
−
'''2,00 '''Which is 10 units away from x and 10 units away from y axis.
+
|-
 +
|05:24
 +
|Then X value is zero but Y becomes -10 because it is going in opposite direction. That is why value is -ve (negetive) here.
  
 +
|-
 +
|05:36
 +
|For the next horizontal line in 9 O'clock direction, I say @.
  
−
'''2.05''' Now suppose I want to draw a horizontal line in this direction, going away from this pint. Say 10 units.
+
|-
 +
|05:43
 +
|Now X-axis is -ve (negetive), it is going in opposite direction in relation to the previously drawn point -10,0.
  
 +
|-
 +
|05:53
 +
|And now, to close the drawing, I can put 'C' and '''Enter'''.
  
−
'''2.13''' For the next point, I will add 20,10  
+
|-
 +
|05:57
 +
|Or to go back to that original point- This case I say @ 0  X-axis is zero and Y is going vertical in +ve direction, so +10.
  
 +
|-
 +
|06:11
 +
|This is how you draw using '''relative coordinate''' method.
  
−
'''2.18 '''X-axis value is 20 because, this point the new point will always be in relation to this absolute zero.
+
|-
 +
| 06:16
 +
| Next is '''Relative Polar co-ordinate system'''.
  
 +
|-
 +
|06:20
 +
|It relies on distance and angle relative to the last specified point.
  
−
'''2.27 '''So to meet this distance of 10 I will have to add 10 units to the earlier point's X-value.
+
|-
 +
|06:24
 +
|Always it is positive and represents distance away from the first point.
  
 +
|-
 +
|06:30
 +
|Let's try and draw the previously drawn square, using this (relative) polar coordinate system.
  
−
'''2.35''' And Y value will not change so it will be 10 here.
+
|-
 +
|06:36
 +
| In polar coordinates, right towards 3 O'clock is always default zero angle.
  
 +
|-
 +
|06:42
 +
|All other angles are calculated in anti-clockwise direction related to default zero.
  
−
'''2.40 '''Now if I want to go vertical line downwards again of 10 units
+
|-
 +
|06:48
 +
|So, let's go to '''Line''' tool – again '''Line with two points'''.
  
 +
|-
 +
|06:52
 +
|At the '''command prompt''', specify first point as 10,10. '''Enter'''. Point is drawn.
  
−
'''2.46 '''for the next point at the command prompt I will put (showing on application so pause for 4 sec. 2:49-2:53) then say 20,0
+
|-
 +
|07:00
 +
|Now, to draw horizontal line of 10 units using relative polar coordinates, I first put @ symbol because it is relative method.
  
 +
|-
 +
|07:10
 +
|Then I say distance, I know which is 10.
  
−
'''2.56 '''X-axis value won't change, Y-axis will be 20 units -ve from the earlier value. So it will be 0.
+
|-
 +
|07:14
 +
|I use this symbol (<) less than symbol “<” for angle
  
 +
|-
 +
|07:23
 +
|I know angle is in 3 O'clock direction, which is zero. (@10<0)
  
−
'''3.05 '''Now again to go horizontal in 9 O'clock direction for the next point I will put (showing on application so pause for 4 sec. 3:11-3:15) 10,0
+
|-
 +
|07:28
 +
|So, my horizontal line of 10 units is drawn.
  
 +
|-
 +
|07:30
 +
|For the vertical line in downward direction, I again put @10<270
  
−
'''3.20 '''Here Y-axis won't change and X-axis will be -10.
+
|-
 +
|07:37
 +
|and 270 as angle this time because anti-clockwise downward is 270.
  
 +
|-
 +
|07:50
 +
|For the next point, horizontal line in 9 O'clock direction,
  
−
'''3.26 '''In relation to the previously drawn point.
+
|-
 +
|07:54
 +
| I say @10<180, angle will be 180 as it is exactly opposite to the default zero position.
  
 +
|-
 +
|08:05
 +
|Lastly, I can always put 'c' to close or else enter the point as @10<90; because, it is going in upward direction.
  
−
'''3.29''' Now to close my drawing I can always put 'c' and hit enter or
+
|-
 +
|08:16
 +
|This completes our drawing in '''Polar coordinates''' method.
  
 +
|-
 +
| 08:19
 +
|Third is the '''Direct distance''' method
  
−
'''3.35 '''I can go back to my original point which was 10,10.
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|-
 +
|08:22
 +
|which can be used to draw lines by specifying first point in relation to already drawn object using '''snapping tools'''  
  
 +
|-
 +
|08:30
 +
|by placing a cursor at that point and entering a distance value.
  
−
'''3.39''' and it will close the drawing. This is how you draw using the command line input.
+
|-
 +
|08:35
 +
| Let's say- in this drawing, if I want to put a horizontal line going in 3 O'clock direction exactly from this point.
  
 +
|-
 +
|08:43
 +
|I can do so by using this '''direct''' method.
  
−
'''3.45 '''You can draw any drawing by using this coordinate system by adding, subtracting absolute co-ordinates for any point or vertex between two segments.
+
|-
 +
|08:50
 +
|I choose '''Line- Line with two points'''. Now I know exactly at what point I want line ahead.
  
 +
|-
 +
|08:57
 +
|So, from '''Snapping''' options on the left tool bar, I choose 'snap to endpoint' and then go on that point and left-click to select the first point.
  
−
'''3.56 '''Like I did to draw this 10 units.
+
|-
 +
|09:09
 +
|Now, in relation to this I want to draw horizontal line of 20 units.
  
 +
|-
 +
|09:15
 +
|So, I use '''command line''' to specify my next point.
  
−
'''4.00''' But this is going to be little complicated.
+
|-
 +
|09:20
 +
|I can use '''relative polar coordinate system''' here.
  
 +
|-
 +
|09:24
 +
|Since it is relative, I say @ now distance is 20 and in 3 O'clock direction which is default zero angle. So, I say @20<0
 +
|-
 +
|09:36
 +
|and '''Enter'''. The line is drawn.
  
−
'''4.03 '''Rather QCAD offers three easy methods to draw objects with.
+
|-
 +
|09:39
 +
|Now say, I want vertical line of say 7 units going in 90 degrees direction.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 4
+
|09:46
 +
|I can use now '''relative co-ordinate''' method here.
  
−
(Drawing methods)  
+
|-
 +
|09:52
 +
|And, say @ (I know 7 is Y direction and X is zero) so 0,7
  
−
(4:09-6:15)
+
|-
 +
|10:01
 +
|and I can use '''relative coordinate''' method to draw this vertical line.
  
 +
|-
 +
|10:07
 +
|Again, if I want horizontal line going in 9 O'clock direction, say 5 units away.
  
−
Switch to QCAD tool->
+
|-
−
| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''4.09 '''First is Relative co-ordinates System,  
+
|10:12
 +
|I can again use relative coordinate method. At the '''command prompt''', I say @ -5 now because X value will be negetive comma 0, Y is zero.
  
 +
|-
 +
|10:18
 +
|Now, I can close down this line because I know the distance is 7.
  
−
'''4.12 '''It uses coordinates that are relative to the last point designated, rather than a 0,0 point of the drawing area.  
+
|-
 +
|10:33
 +
|I can draw vertical line going towards 6 O'clock direction.
  
 +
|-
 +
|10:39
 +
|Once I know all the different methods I can draw objects with, I can use combination of any to draw objects.
  
−
'''4.19 '''@ symbol is used to enter data using this system.
+
|-
 +
|10:46
 +
|So, now to draw that vertical line, I can use relative polar method.  
  
 +
|-
 +
|10:51
 +
|<nowiki> So, I say @ I know distance is 7, I use '<' (angle) symbol since it is 6 O'clock direction, it is going to be 270. </nowiki>
  
−
'''4.26 '''Lets try drawing this previously drawn square using relative coordinate method.
+
|-
 +
|11:00
 +
|This completes our drawing.
  
 +
|-
 +
|11:06
 +
|This is how you use different methods in QCAD.
  
−
'''4.30'''Let me clear the drawing area
+
|-
 +
|11:10
 +
|Now that you are familiar with drawing methods and the coordinates system in QCAD,
  
 +
|-
 +
|11:15
 +
|Let's come to the assignment.
  
−
'''4.35 '''Go to back line tool- Line with two points.
+
|-
 +
|11:17
 +
|I would like you to draw diagram as shown in the figure.  
  
−
 
+
|-
−
'''4.38 '''To specify first point at the command prompt enter 10,10- again x and y axis.
+
|11:20
−
 
+
|You can either use relative coordinate, relative polar, direct method or combination of any method to draw this.
−
 
+
−
'''4.46 '''It is going to put point at 10,10 distance. For the next point now that we are using relative system we have to put '@' symbol.
+
−
 
+
−
 
+
−
'''4.57 '''Whenever we want to use relative system @ symbol is a must.
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−
 
+
−
 
+
−
'''5.01 '''After that, I want to draw horizontal line in 3 O'clock direction of 10 units.
+
−
 
+
−
 
+
−
'''5.08 '''So X value is 10 so I put @10,0 because Y value is zero here.
+
−
 
+
−
 
+
−
'''5.16 '''Now for the vertical line going in downward direction, again for relative I use @
+
−
 
+
−
 
+
−
'''5.24 '''Then X value is zero but Y becomes -10 because it is going in opposite direction that is why value is -ve here.
+
−
 
+
−
 
+
−
'''5.36 '''For the next horizontal line in 9 O'clock direction, I say @
+
−
 
+
−
 
+
−
'''5.43 '''Now X axis is -ve, it is going in opposite direction in relation to the previously drawn point. -10,0
+
−
 
+
−
 
+
−
'''5.53 '''Now to close the drawing I can put 'C' and enter.
+
−
 
+
−
 
+
−
'''5.57 '''Or to go back to that original point. This case I say @ 0- X-axis is zero and Y is going in +ve direction so +10.
+
−
 
+
−
 
+
−
'''6.11 '''This is how you draw using relative coordinate method.
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 4
+
|11:29
−
 
+
| I would like to acknowledge the '''Spoken tutorial''' project which is part of the '''Talk to a teacher''' project.
−
(Drawing methods)
+
−
 
+
−
(6:16-8:18)
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−
 
+
−
 
+
−
Switch to QCAD tool->
+
−
| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''6.16 '''Next is Relative Polar co-ordinate system
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−
 
+
−
 
+
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'''6.20 '''It relies on distance and angle relative to the last specified point.
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−
 
+
−
 
+
−
'''6.24 '''Always it is +ve and represents distance away from the first point.
+
−
 
+
−
'''6.30 '''Let's try and draw the Previously drawn square using this relative polar coordinate system.
+
−
 
+
−
 
+
−
'''6.36 '''In polar coordinate, right towards towards 3 O'clock is always default zero angle.
+
−
 
+
−
 
+
−
'''6.42 '''All other angles are calculated in anti-clockwise direction related to default zero.
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−
 
+
−
 
+
−
'''6.48 '''So let's go to line tool – again line with two points
+
−
 
+
−
 
+
−
'''6.52 '''at the command prompt specify first point as 10,10 -Enter. Point is drawn.
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−
 
+
−
 
+
−
'''7.00 '''Now to draw horizontal line of 10 units using relative polar coordinates. I first put @ symbol because it is relative method.
+
−
 
+
−
 
+
−
'''7.10 '''Then I say distance, I know which is 10
+
−
 
+
−
 
+
−
'''7.14 '''<nowiki>I use this symbol (<)less than symbol “<”for angle</nowiki>
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−
 
+
−
 
+
−
'''7.23 '''<nowiki>I know angle is in 3 O'clock direction, which is zero. (@10<0)</nowiki>
+
−
 
+
−
 
+
−
'''7.28 '''so my horizontal line of 10 units is drawn.
+
−
 
+
−
 
+
−
'''7.30 '''<nowiki>For the vertical line in downward direction I again put @10<270</nowiki>
+
−
 
+
−
 
+
−
'''7.37''' and 270 as angle this time because anti-clockwise downward is 270
+
−
 
+
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'''7.50 '''for the next point horizontal line in 9 O'clock direction
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'''7.54 '''<nowiki>I say @10<180, angle will be 180, as it is exactly opposite to the default zero position.</nowiki>
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'''8.05 '''<nowiki>Lastly I can always put 'c' to close or else enter the point as @10<90, because it is going in upward direction.</nowiki>
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'''8.16 '''This completes our drawing in Polar coordinate method.
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to slide number 4
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|11:33
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|It is supported by the National Mission on Education through ICT, MHRD, government of India.
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(Drawing methods)
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(8:19-11:09)
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Switch to QCAD tool->
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''8.19 '''Third is the Direct distance method
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'''8.22 '''Which can be used to draw lines by specifying first point in relation to already drawn object using snapping tools.
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'''8.30 '''By placing a cursor at that point and entering a distance value.
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'''8.35 '''Let's say in this drawing, if I want to put a horizontal line going in 3 O'clock direction exactly from this point.
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'''8.43 '''I can do so by using this direct method.
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'''8.50 '''I choose line- line with two points
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Now I know exactly at what point I want line ahead
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'''9.09 '''Now in relation to this I want to draw horizontal line of 20 units.
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'''9.24 '''<nowiki>Since it is relative I say @ now distance is 20 and in 3O'clock direction, which is default zero angle so I say @20<0</nowiki>
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'''9.36 '''and Enter. The line is drawn.
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'''10.39 '''Once I know all the different methods I can draw objects with. I can use combination of any to draw objects.
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'''10.46 '''Now to draw that vertical line, I can use relative polar coordinate.
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'''11.00'''This completes our drawing.
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'''11.06 '''This is how you use different methods in QCAD.
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|11:40
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|For more information on this, please visit following website.  
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(Assignment)
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(11:10-11:27)
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''11.10 '''Now that you are familiar with drawing methods and the coordinates system in QCAD.
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'''11.15 '''Lets come to the to the ASSIGNMENT.
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[[Image:]]
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'''11.17 '''i would like you to draw diagram as shown in the figure.
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'''11.20 '''You can either use relative coordinate, relative polar, direct method or combination of any method to draw this.
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to Slide 6
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| 11:46
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|Thank you.Hope you are enjoying exploring QCAD.
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(Acknowledgement)
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11:28-11:45)
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''11.29 '''I would like to acknowledge the spoken tutorial project which is part of the talk to a teacher project.
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'''11.33 '''It is supported by the National Mission on Education through ICT, MHRD government of India.
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'''11.40 '''For more information on this please visit following website.  
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:none;padding:0.097cm;"| Switch to Slide 7
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|11:50
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|This is Leena, signing off.  
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(11:46-11:52)
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| style="border-top:none;border-bottom:0.002cm solid #000000;border-left:0.002cm solid #000000;border-right:0.002cm solid #000000;padding:0.097cm;"| '''11.46 '''Thank you.
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'''11.47 '''Hope you are enjoying exploring QCAD
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'''11.50'''This is Leena signing off.  
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Latest revision as of 17:29, 23 March 2017

Time Narration
00:00 Hello and welcome back to another QCAD tutorial
00:04 Drawing methods in QCAD and knowing coordinate system.
00:09 QCAD uses Cartesian co-ordinate system which consists of two numbered scales, called as x-axis, y-axis.
00:17 These are perpendicular to each other. These axes divide coordinate system into 4 quadrants.
00:24 Your work in QCAD will mostly be in quadrant I.
00:27 The point where these axes meet is called as absolute origin or the origin point.
00:34 For this tutorial, I am using the GNU Linux operating system Ubuntu Version 10.04 LTS
00:40 and QCAD Community Edition Version 2.0.5.0
00:46 In this tutorial, we will see:
00:48 Cartesian coordinate system
00:51 How to use command line to draw objects and
00:53 different drawing methods available in QCAD.
00:56 Let's first see how to use command line to put in co-ordinates, to draw points and draw objects of required measurements
01:06 using the Cartesian coordinate system.
01:08 Please have the QCAD application open in your system.
01:11 If you want to know how to install QCAD, please refer to the earlier tutorial called 'Introduction to QCAD'
01:18 which is available on spoken-tutorial website.
01:22 Once the application is open, from the tool bar on left, choose Line tool- Line with two points.
01:28 Now focus on the command prompt because we are going to use command line to put in exact coordinates.
01:35 It is asking to 'specify first point'. Let's put 10 comma 10.
01:41 We always put X-axis value first and then the Y-axis value.
01:45 What it is going to do is, it will add a point, 10 units away from X and from Y-axis.
01:53 Hit Enter. See the point is entered in relation to this origin or absolute 0, 0
02:00 which is 10 units away from X and 10 units away from Y-axis.
02:05 Now, suppose I want to draw a horizontal line in this direction, going away from this point, say 10 units.
02:13 For the next point, I will add 20, 10.
02:18 X-axis value is 20 because this point, the new point, will always be in relation to this absolute zero.
02:27 So, to meet the distance of 10, I will have to add 10 units to the earlier point's X-value.
02:35 And Y-value will not change; so, it will be 10 here.
02:40 Now, if I want to go vertical line downwards again of 10 units,
02:46 for the next point at the command prompt, I will put 20, 0.
02:56 X-axis value won't change, Y-axis will be 20 units -ve from the earlier value. So, it will be 0.
03:05 Now, again to go horizontal in 9 (nine) O'clock direction, for the next point, I will put (showing on application so pause for 4 sec. 3:11-3:15) 10, 0.
03:20 Here, Y-axis won't change and X-axis will be -10
03:26 in relation to the previously drawn point.
03:29 Now, to close my drawing I can always put 'c' and hit Enter or
03:35 I can go back to my original point which was 10, 10
03:39 and it will close the drawing. This is how you draw using the command line input.
03:45 You can draw any drawing by using this coordinate system by adding, subtracting absolute co-ordinates for any point or vertex between two segments
03:56 like I did to draw this 10 units.
04:00 But this is going to be little complicated.
04:03 Rather QCAD offers three easy methods to draw objects with.
04:09 First is Relative co-ordinates System.
04:12 It uses coordinates that are relative to the last point designated, rather than a 0,0 point of the drawing area.
04:19 "@" symbol is used to enter data, using this system.
04:26 Let's try drawing this previously drawn square, using relative coordinate system.
04:30 Let me clear my drawing.
04:35 Go back to line tool- Line with two points.
04:38 To specify first point, at the command prompt, enter 10,10- again X and Y-axis.
04:46 It is going to put point at 10,10 distance. For the next point, now that we are using relative system, we have to put '@' symbol.
04:57 Whenever we want to use relative system '@' symbol is a must.
05:01 After that, I want to draw horizontal line in 3 O'clock direction of 10 units.
05:08 So, X value is 10. So, I put @10,0 because Y value is zero here.
05:16 Now, for the vertical line going in downward direction, again for relative I use '@'.
05:24 Then X value is zero but Y becomes -10 because it is going in opposite direction. That is why value is -ve (negetive) here.
05:36 For the next horizontal line in 9 O'clock direction, I say @.
05:43 Now X-axis is -ve (negetive), it is going in opposite direction in relation to the previously drawn point -10,0.
05:53 And now, to close the drawing, I can put 'C' and Enter.
05:57 Or to go back to that original point- This case I say @ 0 X-axis is zero and Y is going vertical in +ve direction, so +10.
06:11 This is how you draw using relative coordinate method.
06:16 Next is Relative Polar co-ordinate system.
06:20 It relies on distance and angle relative to the last specified point.
06:24 Always it is positive and represents distance away from the first point.
06:30 Let's try and draw the previously drawn square, using this (relative) polar coordinate system.
06:36 In polar coordinates, right towards 3 O'clock is always default zero angle.
06:42 All other angles are calculated in anti-clockwise direction related to default zero.
06:48 So, let's go to Line tool – again Line with two points.
06:52 At the command prompt, specify first point as 10,10. Enter. Point is drawn.
07:00 Now, to draw horizontal line of 10 units using relative polar coordinates, I first put @ symbol because it is relative method.
07:10 Then I say distance, I know which is 10.
07:14 I use this symbol (<) less than symbol “<” for angle
07:23 I know angle is in 3 O'clock direction, which is zero. (@10<0)
07:28 So, my horizontal line of 10 units is drawn.
07:30 For the vertical line in downward direction, I again put @10<270
07:37 and 270 as angle this time because anti-clockwise downward is 270.
07:50 For the next point, horizontal line in 9 O'clock direction,
07:54 I say @10<180, angle will be 180 as it is exactly opposite to the default zero position.
08:05 Lastly, I can always put 'c' to close or else enter the point as @10<90; because, it is going in upward direction.
08:16 This completes our drawing in Polar coordinates method.
08:19 Third is the Direct distance method
08:22 which can be used to draw lines by specifying first point in relation to already drawn object using snapping tools
08:30 by placing a cursor at that point and entering a distance value.
08:35 Let's say- in this drawing, if I want to put a horizontal line going in 3 O'clock direction exactly from this point.
08:43 I can do so by using this direct method.
08:50 I choose Line- Line with two points. Now I know exactly at what point I want line ahead.
08:57 So, from Snapping options on the left tool bar, I choose 'snap to endpoint' and then go on that point and left-click to select the first point.
09:09 Now, in relation to this I want to draw horizontal line of 20 units.
09:15 So, I use command line to specify my next point.
09:20 I can use relative polar coordinate system here.
09:24 Since it is relative, I say @ now distance is 20 and in 3 O'clock direction which is default zero angle. So, I say @20<0
09:36 and Enter. The line is drawn.
09:39 Now say, I want vertical line of say 7 units going in 90 degrees direction.
09:46 I can use now relative co-ordinate method here.
09:52 And, say @ (I know 7 is Y direction and X is zero) so 0,7
10:01 and I can use relative coordinate method to draw this vertical line.
10:07 Again, if I want horizontal line going in 9 O'clock direction, say 5 units away.
10:12 I can again use relative coordinate method. At the command prompt, I say @ -5 now because X value will be negetive comma 0, Y is zero.
10:18 Now, I can close down this line because I know the distance is 7.
10:33 I can draw vertical line going towards 6 O'clock direction.
10:39 Once I know all the different methods I can draw objects with, I can use combination of any to draw objects.
10:46 So, now to draw that vertical line, I can use relative polar method.
10:51 So, I say @ I know distance is 7, I use '<' (angle) symbol since it is 6 O'clock direction, it is going to be 270.
11:00 This completes our drawing.
11:06 This is how you use different methods in QCAD.
11:10 Now that you are familiar with drawing methods and the coordinates system in QCAD,
11:15 Let's come to the assignment.
11:17 I would like you to draw diagram as shown in the figure.
11:20 You can either use relative coordinate, relative polar, direct method or combination of any method to draw this.
11:29 I would like to acknowledge the Spoken tutorial project which is part of the Talk to a teacher project.
11:33 It is supported by the National Mission on Education through ICT, MHRD, government of India.
11:40 For more information on this, please visit following website.
11:46 Thank you.Hope you are enjoying exploring QCAD.
11:50 This is Leena, signing off.

Contributors and Content Editors

Minal, Nancyvarkey, PoojaMoolya, Pratik kamble, Sandhya.np14

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