View source for Inkscape/C2/Basics-of-Bezier-Tool/English-timed

{| Border = 1
| '''Time'''
| '''Narration'''

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| 00:00
| Welcome to the '''Spoken Tutorial''' on '''Basics of Bezier tool''' using '''Inkscape'''.

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| 00:06
| In this tutorial, we will learn to: 

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| 00:08
| Draw straight lines and closed shapes

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| 00:11
| Draw curved lines 

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| 00:13
| Add, edit and delete nodes.

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| 00:15
| To record this tutorial, I am using:

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| 00:18
| '''Ubuntu Linux''' 12.04 OS

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| 00:21
| '''Inkscape''' version 0.48.4

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| 00:24
|  I will be recording this tutorial in maximum resolution mode. 

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| 00:28
| This is to accommodate all the tools that will be demonstrated. 

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| 00:32
|  Let us open '''Inkscape.'''

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| 00:35
|  First let us draw a straight line using '''Bezier tool. '''

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| 00:39
| The '''Bezier tool''' is right below the '''Pencil tool.''' 

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| 00:42
| Let's click on it.

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| 00:44
| Observe the 4 options in the '''Tool controls bar '''at the top left.

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| 00:48
| There are 4 modes of drawing '''Bezier curve'''.

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| 00:51
| By default, the '''Create regular Bezier path '''option is enabled.

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| 00:57
| Click once on the '''canvas''' and move the cursor to the other end.

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| 01:01
| Click once again. Notice that the line drawn is highlighted in green color. 

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| 01:07
| Now, right-click to complete the line. 

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| 01:11
| The two end points of the line are called '''nodes. '''We will learn more about them a little later.

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| 01:17
| Next, let us draw a triangle. 

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| 01:21
| First, draw a slanted line. Click once and draw another line at an angle. 

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| 01:27
| Now click once more to draw a third line and join it with the starting '''node '''to complete the triangle.

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| 01:34
| Next, we will draw a curved line using '''Bezier tool.'''

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|01:38
| Click on the canvas to draw a straight line. Click again, hold and drag to form a curve. 

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| 01:46
| Right-click to complete the curve.

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| 01:48
| In a similar way, draw some more curve shapes on the canvas. 

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| 01:55
| Remember these steps- 1. Click and draw a straight line. 

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| 01:59
|2. Click again, hold and drag to form a curve.

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| 02:03
|3.  Then right-click to complete the curve. 

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| 02:06
| Press '''Ctrl + A''' and clear the canvas before proceeding further. 

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| 02:11
| Next, let us learn how to draw a closed curved path.

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| 02:15
| First draw a curved line on the canvas. 

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| 02:18
| Then we release the '''mouse''' and move the cursor away from the end node of the curved line.

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| 02:23
| We see a curved path in red color.

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| 02:27
| If you click once and move the cursor, we see a straight path in red color. To make it as a curve, click and drag.

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| 02:36
| Again at the end node, the line curves as we move. 

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| 02:41
| Again click once; we see a straight path in red color. To make the straight line curved, click and drag.

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| 02:50
| Again at the end node, the line curves as we move. Move the cursor and go back to the starting node and close the '''path'''.

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| 02:59
| Go to '''Tool controls bar.''' Click on the second icon of the mode. This helps to create spiral paths and irregular shapes.

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| 03:08
| Draw some irregular curves and close the path. 

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| 03:15
| Observe that it transforms into the closest spiral shape. Let me clear the canvas now.

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| 03:22
|  The third icon creates only straight lines. Click on it and draw lines on the '''canvas. '''

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| 03:29
|  Note, we cannot draw curved lines in this mode. 

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| 03:32
| We can draw triangles or polygons which have straight sides.

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| 03:40
|  Click on the last icon and draw on the''' canvas.'''

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| 03:44
|  In this mode, we can draw only parallel and perpendicular lines i.e. either vertical or horizontal lines.

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| 03:52
| So, we can draw squares and rectangles in this mode.

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| 03:58
|  Let me delete all the shapes drawn. 

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| 04:02
|  '''Shape''' option helps to draw lines or curves in a particular shape. 

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| 04:07
| Click on the drop-down button. 

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| 04:09
| There are 5 options here- '''None, Triangle in, Triangle out, Ellipse, From clipboard.'''

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| 04:18
| The first option that is '''None''' does not give any effect. So, we will move on to '''Triangle in. '''

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| 04:25
| Click on it and draw a line on the '''canvas. '''

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| 04:28
| The line is transformed to a triangle shape inwards.

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| 04:34
| Next, click on '''Triangle out '''and draw a line on the canvas. 

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| 04:39
| Now a triangle shape is formed outwards.

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| 04:43
| Click on the '''Ellipse''' and draw a line. 

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| 04:47
| Observe that the line is in '''ellipse '''shape.

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| 04:50
| We will learn about the last option that is '''From clipboard''' in later tutorial.

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| 04:56
|  Now, let us learn how to add, edit and delete '''nodes'''. 

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| 05:00
| This can be done using the '''Node tool.'''

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| 05:03
| Delete the lines on the '''canvas.'''

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| 05:06
| Go to '''Tool controls bar.''' Change the '''Mode''' to '''regular path '''and '''Shape''' to '''None.'''

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| 05:13
| Come back to the '''canvas''' and draw a rough human palm.

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| 05:23
| Now, click on the''' Node''' tool. 

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| 05:26
| Notice all the nodes in this figure are visible.

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| 05:30
| Turn your attention to the '''Tool Controls bar.'''

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| 05:33
| The first 6 icons here, help to add and delete''' nodes''' and '''paths'''. 

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| 05:38
| Refer to the tool tip to understand better.

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| 05:41
| Click on any segment. Notice both the nodes turn blue.

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| 05:48
| Then click on the '''Add node '''option.

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| 05:52
| Observe that a new node has been added exactly in-between the nodes of the selected segment.

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| 05:58
| Now, select a smaller segment and repeat the above steps.

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| 06:04
| You will see that a new node is added at the mid-point of the smaller segment.

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| 06:10
| Now, select the newly added node. 

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| 06:13
| Click on the '''Delete node '''option. The node is now deleted.

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| 06:18
| Click on any one of the '''nodes''' on the palm. 

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| 06:21
| To make the '''Bezier handle''' visible, click on the last but one icon on the '''Tool controls bar. '''

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| 06:27
| Now, the '''Bezier handles''' for the selected segment is visible. 

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| 06:32
| If not, then just click on the segment and without releasing the '''mouse''', move it a little.

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| 06:37
| The segment will curve and the '''Bezier handles''' will be visible now.

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| 06:41
| Click on the '''handles '''to resize and rotate the selected '''node'''.

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| 06:45
| In a similar way, modify the other '''nodes '''too.

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| 07:04
| The next icon helps to join '''nodes.'''

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| 07:07
| Observe, there is an extra '''node''' on the index finger. 

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| 07:11
| Select the extra middle '''node''' and the top '''node '''by using the '''Shift''' key.

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| 07:18
| Now, click on '''Join node''' icon. Observe that the nodes are now joined together.

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| 07:25
| The next icon helps to break '''path''' at selected '''nodes'''. 

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| 07:29
| Let me now break the connection between the thumb and the index finger. 

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| 07:33
| So, select the joining''' node''' in between and click on '''Break path''' icon.

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| 07:40
| Un-select the node. Then select it again and move it a little. 

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| 07:46
| You will notice that the path is broken and the '''nodes''' are separated into 2 distinct nodes.

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| 07:53
|  To join them, select the same 2 '''nodes''' and click on the '''Join selected end-nodes''' icon on the '''Tool controls bar. '''

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| 08:03
| Notice, a new '''path '''is created between these 2 '''nodes.'''

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| 08:08
| Click on the next icon i.e. '''Delete segment''' icon to remove the '''path''' or '''segment'''. Now the path is removed. 

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| 08:17
| Press '''Ctrl + Z''' to '''undo''' this action.

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| 08:20
| Let me keep this hand aside. Click on the '''Node tool '''once again.

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| 08:26
| Let us learn how to use next 4 icons on the '''Tool controls bar.'''

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| 08:30
| These icons help to '''edit''' the selected nodes.

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| 08:34
| Using the '''Bezier tool ''',draw an inverted '''U''' shape. Click on the '''Node''' tool. Observe there are 3 '''nodes.'''

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| 08:49
| Select the top node and click on '''Make selected nodes corner''' icon on the '''Tool controls bar.'''

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| 08:55
| This makes it as the corner node. 

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| 08:58
| Click on the '''Bezier handles''' and move them up and down to see the change. 

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| 09:03
|  Click on the next icon to make the '''node''' smooth. Observe the change in the shape.

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| 09:11
| Click on the next icon which makes the '''node''' symmetric.

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| 09:16
| Click on the next icon which makes the '''node''' auto smooth.

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| 09:20
| The next 2 icons work only on segments. So, select the left segment of the '''U '''shape and click on the first icon.

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| 09:30
| As the tool tip says, the segment is now made into a straight line.

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| 09:35
| Click on the '''Bezier handle''' and try to move. You will see that we cannot make it curved.

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| 09:44
| Click on the next icon to make it a curved line again. 

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| 09:49
| Now, move the '''Bezier handles''' and  now we can make it into a curve shape.

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| 09:54
| Click on the next icon to convert selected object to '''path.'''

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| 09:58
| Click on the next icon to convert the '''stroke''' to '''path'''. 

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| 10:02
| Click and drag the '''nodes''' to make the '''strokes '''visible.

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| 10:08
| The next 2 icons help to move the selected '''nodes''' in X and Y directions respectively.

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| 10:15
| Click on the up and down arrows and observe the change.

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|10:24
| The next 2 icons work only if the path has clipping and masking effects. 

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| 10:29
| You can explore these options on your own.

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| 10:33
|  Let us summarize.In this tutorial, we learnt to:

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| 10:37
| Draw straight lines and closed shapes

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| 10:39
| Draw curved lines 

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| 10:41
| Add, edit and delete nodes.

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| 10:43
| Here is an assignment for you-

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| 10:46
| Draw a flower with 5 petals, 1 stem and 2 leaves using '''Bezier tool'''.

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| 10:52
| Color the petals with pink color.

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| 10:54
| Color the stem and leaves with green color.

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| 10:57
| Your completed assignment should look like this. 

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| 11:00
| The video available at the following link summarizes the Spoken Tutorial project. Please watch it. 

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| 11:05
| The Spoken Tutorial Project team conducts workshops and gives certificates for those who pass an online test. 

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| 11:12
| For more details, please write to us. 

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| 11:14
| Spoken Tutorial Project is supported by NMEICT, MHRD, Government of India. 

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| 11:20
| More information on this mission is available at this link. 

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| 11:24
|  We have come to the end of this tutorial. 

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| 11:26
| This is Arthi and Saurabh from IIT Bombay, signing off. Thanks for joining. 

|}