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

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|-
 
|-
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| 00.00  
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| 00:00  
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| Hello and welcome back to another QCAD tutorial.
+
| Hello and welcome back to another QCAD tutorial  
−
 
+
  
 
|-
 
|-
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| 00.04
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| 00:04
−
| Drawing methods in QCAD and knowing coordinate system.
+
| '''Drawing methods in QCAD''' and knowing coordinate system.
  
 
|-
 
|-
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|  00.09
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|  00:09
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| Qcad uses Cartesian co-ordinate system, which consists of two numbered scales, called as x-axis, y-axis.
+
| QCAD uses Cartesian co-ordinate system which consists of two numbered scales, called as x-axis, y-axis.
−
 
+
  
 
|-
 
|-
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|  00.17
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|  00:17
−
| These are perpendicular to each other. These axis do divide coordinate system into 4 quadrants.
+
| These are perpendicular to each other. These axes divide coordinate system into 4 quadrants.
−
 
+
  
 
|-
 
|-
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|00.24
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|00:24
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|Your work in QCAD will mostly be in quadrant I
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|Your work in QCAD will mostly be in quadrant I.
−
 
+
  
 
|-
 
|-
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|00.27
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|00:27
−
|The point where these axis meet is called as absolute origin or the origin point.
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|The point where these axes meet is called as '''absolute origin''' or the origin point.
  
 
|-
 
|-
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| 00.34  
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| 00:34  
−
| For this tutorial, I am using the GNU Linux operating system Ubuntu Version 10.04 LTS  
+
| For this tutorial, I am using the '''GNU Linux operating system Ubuntu''' Version '''10.04 LTS'''
−
 
+
  
 
|-
 
|-
−
|00.40
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|00:40
−
|and QCAD Community Edition Version 2.0.5.0
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|and '''QCAD Community Edition''' Version '''2.0.5.0'''
  
 
|-
 
|-
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| 00.46  
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| 00:46  
−
| In this tutorial we will see  
+
| In this tutorial, we will see:
  
 
|-
 
|-
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|00.48
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|00:48
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| Cartesian coordinate system
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| '''Cartesian coordinate system'''
  
 
|-
 
|-
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|00.51
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|00:51
−
|How to use command line to draw objects  
+
|How to use '''command line''' to draw objects and
  
 
|-
 
|-
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|00.53
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|00:53
−
|and different drawing methods available in QCAD  
+
| different drawing methods available in QCAD.
  
 
|-
 
|-
−
| 00.56  
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| 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.
+
| 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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|01.06
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|01:06
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|Using the Cartesian coordinate system.
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|using the Cartesian coordinate system.
  
 
|-
 
|-
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|1.08
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|01:08
−
|Please have the QCAD application open in your system.
+
|Please have the '''QCAD application''' open in your system.
  
 
|-
 
|-
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|01.11
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|01:11
−
| If you want to know how to install QCAD please refer to the earlier tutorial called as 'Introduction to QCAD'.
+
| If you want to know how to install QCAD, please refer to the earlier tutorial called 'Introduction to QCAD'
  
 
|-
 
|-
−
|01.18
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|01:18
−
|Which is available on spoken-tutorial website.
+
|which is available on '''spoken-tutorial''' website.
  
 
|-
 
|-
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|01.22
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|01:22
−
|Once the application is open from the tool bar on left choose line tool- line with two points.
+
|Once the '''application''' is open, from the tool bar on left, choose '''Line''' tool- '''Line with two points'''.
  
 
|-
 
|-
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|01.28
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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.
+
|Now focus on the command prompt because we are going to use '''command line''' to put in exact coordinates.
  
 
|-
 
|-
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|01.35  
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|01:35  
−
|It is asking to 'specify first point' Let's enter 10 comma 10  
+
|It is asking to 'specify first point'. Let's put 10 comma 10.
  
 
|-
 
|-
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|01.41
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|01:41
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|We always add x axis value first and then y axis value.
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|We always put X-axis value first and then the Y-axis value.
  
 
|-
 
|-
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|01.45
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|01:45
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|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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|What it is going to do is, it will add a point, 10 units away from X and from Y-axis.
  
 
|-
 
|-
−
|01.53  
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|01:53  
−
|Hit enter. See the point is entered in relation to this origin or absolute 0, 0
+
|Hit '''Enter'''. See the point is entered in relation to this origin or '''absolute''' 0, 0
−
 
+
  
 
|-
 
|-
 
|02:00  
 
|02:00  
−
|Which is 10 units away from x and 10 units away from y axis.
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|which is 10 units away from X and 10 units away from Y-axis.
−
 
+
  
 
|-
 
|-
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|02.05
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|02:05
−
| Now suppose I want to draw a horizontal line in this direction, going away from this pint. Say 10 units.
+
| Now, suppose I want to draw a horizontal line in this direction, going away from this point, say 10 units.
−
 
+
  
 
|-
 
|-
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|02.13
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|02:13
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|For the next point, I will add 20,10  
+
|For the next point, I will add 20, 10.
−
 
+
  
 
|-
 
|-
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|02.18
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|02:18
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|X-axis value is 20 because, this point the new point will always be in relation to this absolute zero.
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|X-axis value is 20 because this point, the new point, will always be in relation to this absolute zero.
  
 
|-
 
|-
−
|2.27
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|02:27
−
|So to meet this distance of 10 I will have to add 10 units to the earlier point's X-value.
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|So, to meet the distance of 10, I will have to add 10 units to the earlier point's X-value.
  
 
|-
 
|-
−
|02.35
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|02:35
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|And Y value will not change so it will be 10 here.
+
|And Y-value will not change; so, it will be 10 here.
−
 
+
  
 
|-
 
|-
−
|02.40
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|02:40
−
|Now if I want to go vertical line downwards again of 10 units
+
|Now, if I want to go vertical line downwards again of 10 units,
  
 
|-
 
|-
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|02.46
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|02:46
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|for the next point at the command prompt I will put then say 20,0
+
|for the next point at the command prompt, I will put 20, 0.
  
 
|-
 
|-
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|02.56
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|02:56
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|X-axis value won't change, Y-axis will be 20 units -ve from the earlier value. So it will be 0.
+
|X-axis value won't change, Y-axis will be 20 units -ve from the earlier value. So, it will be 0.
  
 
|-
 
|-
−
|03.05
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|03:05
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|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
+
|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.
  
 
|-
 
|-
−
|3.20
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|03:20
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|Here Y-axis won't change and X-axis will be -10.
+
|Here, Y-axis won't change and X-axis will be -10
  
 
|-
 
|-
−
|3.26  
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|03:26  
−
|In relation to the previously drawn point.
+
|in relation to the previously drawn point.
  
 
|-
 
|-
−
|3.29
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|03:29
−
|Now to close my drawing I can always put 'c' and hit enter or
+
|Now, to close my drawing I can always put 'c' and hit '''Enter''' or
−
 
+
  
 
|-
 
|-
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|03.35
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|03:35
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|I can go back to my original point which was 10,10.
+
|I can go back to my original point which was 10, 10
  
 
|-
 
|-
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|03.39
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|03:39
−
|and it will close the drawing. This is how you draw using the command line input.
+
|and it will close the drawing. This is how you draw using the '''command line input'''.
−
 
+
  
 
|-
 
|-
−
|03.45
+
|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.
+
|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  
+
|03:56  
−
|Like I did to draw this 10 units.
+
|like I did to draw this 10 units.
  
 
|-
 
|-
−
|04.00
+
|04:00
 
|But this is going to be little complicated.
 
|But this is going to be little complicated.
  
 
|-
 
|-
−
|04.03
+
|04:03
 
|Rather QCAD offers three easy methods to draw objects with.
 
|Rather QCAD offers three easy methods to draw objects with.
  
 
|-
 
|-
 
| 04:09
 
| 04:09
−
| First is Relative co-ordinates System,
+
| First is '''Relative co-ordinates System'''.
  
 
|-
 
|-
−
|04.12
+
|04:12
 
|It uses coordinates that are relative to the last point designated, rather than a 0,0 point of the drawing area.  
 
|It uses coordinates that are relative to the last point designated, rather than a 0,0 point of the drawing area.  
  
 
|-
 
|-
−
|04.19  
+
|04:19  
−
|@ symbol is used to enter data using this system.
+
|"@" symbol is used to enter data, using this system.
  
 
|-
 
|-
−
|04.26  
+
|04:26  
−
|Lets try drawing this previously drawn square using relative coordinate method.
+
|Let's try drawing this previously drawn square, using relative coordinate system.
−
 
+
  
 
|-
 
|-
−
|04.30
+
|04:30
−
|Let me clear the drawing area
+
|Let me clear my drawing.
  
 
|-
 
|-
−
|04.35
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|04:35
−
|Go to back line tool- Line with two points.
+
|Go back to line tool- '''Line with two points'''.
  
 
|-
 
|-
−
|04.38
+
|04:38
−
|To specify first point at the command prompt enter 10,10- again x and y axis.
+
|To specify first point, at the command prompt, enter 10,10- again X and Y-axis.
  
 
|-
 
|-
−
|04.46
+
|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.
+
|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  
+
|04:57  
−
|Whenever we want to use relative system @ symbol is a must.
+
|Whenever we want to use relative system '@' symbol is a must.
  
 
|-
 
|-
−
|05.01  
+
|05:01  
 
|After that, I want to draw horizontal line in 3 O'clock direction of 10 units.
 
|After that, I want to draw horizontal line in 3 O'clock direction of 10 units.
  
 
|-
 
|-
−
|05.08
+
|05:08
−
|So X value is 10 so I put @10,0 because Y value is zero here.
+
|So, X value is 10. So, I put @10,0 because Y value is zero here.
  
 
|-
 
|-
−
|05.16
+
|05:16
−
|Now for the vertical line going in downward direction, again for relative I use @
+
|Now, for the vertical line going in downward direction, again for relative I use '@'.
  
 
|-
 
|-
−
|05.24
+
|05:24
−
|Then X value is zero but Y becomes -10 because it is going in opposite direction that is why value is -ve here.
+
|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
+
|05:36
−
|For the next horizontal line in 9 O'clock direction, I say @
+
|For the next horizontal line in 9 O'clock direction, I say @.
  
 
|-
 
|-
−
|05.43
+
|05:43
−
|Now X axis is -ve, it is going in opposite direction in relation to the previously drawn point. -10,0
+
|Now X-axis is -ve (negetive), it is going in opposite direction in relation to the previously drawn point -10,0.
  
 
|-
 
|-
−
|05.53  
+
|05:53  
−
|Now to close the drawing I can put 'C' and enter.
+
|And now, to close the drawing, I can put 'C' and '''Enter'''.
−
 
+
  
 
|-
 
|-
−
|5.57
+
|05:57
−
|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.
+
|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.
  
 
|-
 
|-
−
|6.11
+
|06:11
−
|This is how you draw using relative coordinate method.
+
|This is how you draw using '''relative coordinate''' method.
  
 
|-
 
|-
 
| 06:16
 
| 06:16
−
| Next is Relative Polar co-ordinate system
+
| Next is '''Relative Polar co-ordinate system'''.
  
 
|-
 
|-
−
|06.20  
+
|06:20  
 
|It relies on distance and angle relative to the last specified point.
 
|It relies on distance and angle relative to the last specified point.
−
 
  
 
|-
 
|-
−
|06.24  
+
|06:24  
−
|Always it is +ve and represents distance away from the first point.
+
|Always it is positive and represents distance away from the first point.
  
 
|-
 
|-
−
|06.30
+
|06:30
−
|Let's try and draw the Previously drawn square using this relative polar coordinate system.
+
|Let's try and draw the previously drawn square, using this (relative) polar coordinate system.
−
 
+
  
 
|-
 
|-
−
|06.36
+
|06:36
−
| In polar coordinate, right towards towards 3 O'clock is always default zero angle.
+
| In polar coordinates, right towards 3 O'clock is always default zero angle.
  
 
|-
 
|-
−
|06.42
+
|06:42
 
|All other angles are calculated in anti-clockwise direction related to default zero.
 
|All other angles are calculated in anti-clockwise direction related to default zero.
  
 
|-
 
|-
−
|06.48
+
|06:48
−
|So let's go to line tool – again line with two points  
+
|So, let's go to '''Line''' tool – again '''Line with two points'''.
  
 
|-
 
|-
−
|06.52  
+
|06:52  
−
|at the command prompt specify first point as 10,10 -Enter. Point is drawn.
+
|At the '''command prompt''', specify first point as 10,10. '''Enter'''. Point is drawn.
  
 
|-
 
|-
−
|07.00
+
|07:00
−
|Now to draw horizontal line of 10 units using relative polar coordinates. I first put @ symbol because it is relative method.
+
|Now, to draw horizontal line of 10 units using relative polar coordinates, I first put @ symbol because it is relative method.
  
 
|-
 
|-
−
|07.10
+
|07:10
−
|Then I say distance, I know which is 10
+
|Then I say distance, I know which is 10.
−
 
+
  
 
|-
 
|-
−
|7.14
+
|07:14
−
|<nowiki>I use this symbol (<)less than symbol “<”for angle</nowiki>
+
|I use this symbol (<) less than symbol “<” for angle
−
 
+
  
 
|-
 
|-
−
|7.23  
+
|07:23  
−
|<nowiki>I know angle is in 3 O'clock direction, which is zero. (@10<0)</nowiki>
+
|I know angle is in 3 O'clock direction, which is zero. (@10<0)
  
 
|-
 
|-
−
|7.28  
+
|07:28  
−
|so my horizontal line of 10 units is drawn.
+
|So, my horizontal line of 10 units is drawn.
  
 
|-
 
|-
−
|7.30
+
|07:30
−
|<nowiki>For the vertical line in downward direction I again put @10<270</nowiki>
+
|For the vertical line in downward direction, I again put @10<270
  
 
|-
 
|-
−
|7.37
+
|07:37
−
|and 270 as angle this time because anti-clockwise downward is 270
+
|and 270 as angle this time because anti-clockwise downward is 270.
  
 
|-
 
|-
−
|7.50
+
|07:50
−
|for the next point horizontal line in 9 O'clock direction
+
|For the next point, horizontal line in 9 O'clock direction,
  
 
|-
 
|-
−
|07.54  
+
|07:54  
−
|<nowiki>I say @10<180, angle will be 180, as it is exactly opposite to the default zero position.</nowiki>
+
| I say @10<180, angle will be 180 as it is exactly opposite to the default zero position.
  
 
|-
 
|-
−
|08.05
+
|08:05
−
|<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>
+
|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
+
|08:16
−
|This completes our drawing in Polar coordinate method.
+
|This completes our drawing in '''Polar coordinates''' method.
  
 
|-
 
|-
 
| 08:19
 
| 08:19
−
|Third is the Direct distance method
+
|Third is the '''Direct distance''' method
  
 
|-
 
|-
−
|08.22
+
|08:22
−
|Which can be used to draw lines by specifying first point in relation to already drawn object using snapping tools.
+
|which can be used to draw lines by specifying first point in relation to already drawn object using '''snapping tools'''
−
 
+
  
 
|-
 
|-
−
|8.30  
+
|08:30  
−
|By placing a cursor at that point and entering a distance value.  
+
|by placing a cursor at that point and entering a distance value.  
  
 
|-
 
|-
−
|8.35
+
|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.
+
| Let's say- in this drawing, if I want to put a horizontal line going in 3 O'clock direction exactly from this point.
  
 
|-
 
|-
−
|8.43  
+
|08:43  
−
|I can do so by using this direct method.
+
|I can do so by using this '''direct''' method.
  
 
|-
 
|-
−
|8.50
+
|08:50
−
|I choose line- line with two points. Now I know exactly at what point I want line ahead
+
|I choose '''Line- Line with two points'''. Now I know exactly at what point I want line ahead.
  
 
|-
 
|-
−
|8.57  
+
|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.
+
|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.
  
 
|-
 
|-
−
|9.09
+
|09:09
−
|Now in relation to this I want to draw horizontal line of 20 units.
+
|Now, in relation to this I want to draw horizontal line of 20 units.
  
 
|-
 
|-
−
|9.15
+
|09:15
−
|So I use command line to specify my next point.
+
|So, I use '''command line''' to specify my next point.
  
 
|-
 
|-
−
|9.20  
+
|09:20  
−
|I can use relative polar coordinate system here.
+
|I can use '''relative polar coordinate system''' here.
−
 
+
  
 
|-
 
|-
−
|9.24
+
|09:24
−
|<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>
+
|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
−
 
+
 
|-
 
|-
−
|9.36
+
|09:36
−
|and Enter. The line is drawn.
+
|and '''Enter'''. The line is drawn.
  
 
|-
 
|-
−
|9.39  
+
|09:39  
−
|Now say I want vertical line of say 7 units going in 90 degrees direction.
+
|Now say, I want vertical line of say 7 units going in 90 degrees direction.
  
 
|-
 
|-
−
|9.46
+
|09:46
−
|I can use now relative coordinate method here.
+
|I can use now '''relative co-ordinate''' method here.
  
 
|-
 
|-
−
|9.52  
+
|09:52  
−
|and say @ (I know 7 is Y direction and X is zero)so 0,7
+
|And, say @ (I know 7 is Y direction and X is zero) so 0,7
  
 
|-
 
|-
−
|10.01  
+
|10:01  
−
|and I can use relative coordinate method to draw this vertical line.
+
|and I can use '''relative coordinate''' method to draw this vertical line.
  
 
|-
 
|-
−
|10.07
+
|10:07
−
|Again if I want horizontal line going in 9 O'clock direction say 5 units away.
+
|Again, if I want horizontal line going in 9 O'clock direction, say 5 units away.
−
 
+
  
 
|-
 
|-
−
|10.12
+
|10:12
−
|I can again use relative coordinate method.
+
|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.
  
 
|-
 
|-
−
|10.12
+
|10:18
−
| At the command prompt I say @ -5 now because X value will be -ve comma 0, Y is zero.
+
|Now, I can close down this line because I know the distance is 7.
  
 
|-
 
|-
−
|10.18
+
|10:33
−
|Now I can close down this line, because I know the distance is 7
+
|I can draw vertical line going towards 6 O'clock direction.
  
 
|-
 
|-
−
|10.33
+
|10:39
−
|I can draw vertical line going towards 6 O'clock directions
+
|Once I know all the different methods I can draw objects with, I can use combination of any to draw objects.
  
 
|-
 
|-
−
|10.39
+
|10:46
−
|Once I know all the different methods I can draw objects with. I can use combination of any to draw objects.
+
|So, now to draw that vertical line, I can use relative polar method.  
  
 
|-
 
|-
−
|10.46
+
|10:51
−
|Now to draw that vertical line, I can use relative polar coordinate.
+
|<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>
  
 
|-
 
|-
−
|10.51
+
|11:00
−
|<nowiki>So I say @I know distance is 7, I use '<' symbol, since it is 6 O'clock direction it is going to be 270 </nowiki>
+
−
 
+
−
 
+
−
|-
+
−
|11.00
+
 
|This completes our drawing.
 
|This completes our drawing.
  
 
|-
 
|-
−
|11.06  
+
|11:06  
 
|This is how you use different methods in QCAD.
 
|This is how you use different methods in QCAD.
  
 
|-
 
|-
−
|11.10
+
|11:10
−
|Now that you are familiar with drawing methods and the coordinates system in QCAD.
+
|Now that you are familiar with drawing methods and the coordinates system in QCAD,
  
 
|-
 
|-
−
|11.15
+
|11:15
−
|Lets come to the to the ASSIGNMENT.  
+
|Let's come to the assignment.  
  
 
|-
 
|-
−
|11.17
+
|11:17
−
|i would like you to draw diagram as shown in the figure.  
+
|I would like you to draw diagram as shown in the figure.  
  
 
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|You can either use relative coordinate, relative polar, direct method or combination of any method to draw this.
 
|You can either use relative coordinate, relative polar, direct method or combination of any method to draw this.
  
 
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|11:29
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| I would like to acknowledge the spoken tutorial project which is part of the talk to a teacher project.
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| 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  
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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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|It is supported by the National Mission on Education through ICT, MHRD, government of India.
  
 
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|11.40
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|11:40
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|For more information on this please visit following website.  
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|For more information on this, please visit following website.  
  
 
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| 11:46
 
| 11:46
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|Thank you.
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|Thank you.Hope you are enjoying exploring QCAD.
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|11.47
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|Hope you are enjoying exploring QCAD
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|This is Leena signing off.  
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|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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