Difference between revisions of "Inkscape/C2/Layers-and-Boolean-operations/English-timed"

| Time

| Narration

| Welcome to the Spoken Tutorial on '''“Layers and boolean operations” '''using '''Inkscape.'''

| In this tutorial we will learn about Layers  

|Filters

 

| Boolean operations

| To record this tutorial, I am using

| '''Inkscape''' version 0.48.4

| Let us open '''Inkscape'''. Go to '''Dash home '''and type '''Inkscape'''.

| Let's open the '''Assignment_2.svg '''file that we created earlier.

|I had saved it in documents folder.

| Go to '''Layer menu '''and click on '''Layers '''option'''.'''

|Now the '''Layer palette''' is opened on the right side of the interface.

|  By default a '''layer''' is there. You can see, that is named as '''Layer 1'''.

| Now, we can decide the position of the '''layer''' by clicking on the '''Position''' drop down list.  

| Next let us learn to rename a '''layer.'''

|First double click on '''Layer 1'''. And then rename it as '''circle '''and press '''Enter.'''

| Coming back to our '''canvas'''. There are 2 eyes and a bow.

|  Select both the eyes by dragging the mouse.  

|Now click on the '''eye layer''' in the '''Layer Palette. '''

| Repeat the same action for the bow shape.

| These are particularly useful when we have to work on large and complex graphic assignments.

| Notice 2 icons namely, an''' eye''' and a '''lock,''' on the left of each '''layer.'''

| To lock or unlock layers, click on the '''lock''' icon. I have now locked the '''bow layer.'''

| Note that if a '''layer''' is locked, we cannot make any changes to that '''layer'''.

| Let's try to select the bow on the canvas. You will notice that it is not possible to do so.

| Now, I will unlock the '''bow layer'''.

| Now, I am able to select the '''bow''' object and change its properties, as well.

|04:07

| But we cannot see the new '''bow '''on the canvas. That is because the '''bow object '''is overlapped on the previous layer.  

|04:56

|  The four icons next to the '''plus''' icon in the '''Layers Palette''', helps to position the selected '''layer'''.

| The first icon raises the selected '''layer''' to be the topmost '''layer'''.  

|Click on this icon. The '''circle layer''' has moved above the '''eye layer.''' So the eyes are not visible.

| The third icon lowers the selected '''layer,''' one '''layer''' below.

|Click on this icon. Now the '''circle layer''' has moved below the '''eye layer.'''

| The minus icon at the end will delete the selected '''layer'''. Select the '''bow copy layer''' and click on it.

|Observe that the '''bow copy layer''' is no longer seen.

|This means that if objects overlap on the selected '''layers''', '''Inkscape''' will do a pixel-by-pixel blend of the two objects.

| So, keep the '''circle layer''' on the top to make the filters visible.

|  Click on the drop down list of '''Blend mode.''' Notice there are 5 options.

|  The first option that is '''Normal,''' does not add any filter to the layer.  

|Let me click on it. Observe no filter is added to the layer.

| Next click on''' Multiply. '''

|Notice''' '''that objects on the topmost layer, filters the light so that the objects on the bottom layers are visible.

|  If at any time you return the''' Blend mode''' back to''' Normal''', the blend filters applied so far, disappears.

| We can see many more filters in the '''Filters menu. '''

|To apply any particular filter, first select the object first and then click on the desired filter.

|  Move the '''circle layer''' to the bottom again.

| Let me select an eye. Go to '''Filters menu.''' Select '''Blur''' and '''Fancy blur.'''  

|Observe the changes on the eye.

| Let me select the other eye. Go to Filters '''menu.''' Select '''Bevel''' and '''Smart jelly.'''  

|Once again observe the changes applied to the eye.

| Now select the bow. Go to '''Filters menu.''' Select '''Scatter''' and '''Air spray'''

|The bow appears as if it has been air-sprayed.

| The '''Opacity''' option right below the '''Blend mode,''' helps to reduce the Opacity of the selected layer.

| Select the '''circle layer.'''

|Adjust the Opacity level and observe the change in the '''ellipse'''.

| Next we will learn about '''boolean operations. '''

|  Go to '''Path menu.''' These are the available boolean operations.

| Select both. Go to Path menu and click on Union. Observe the 2 shapes are now joined together

|  Now press '''Ctrl + Z''' on your keyboard to undo this action.  

| Again select both. Go to '''Path menu.'''

| Press '''Ctrl + Z '''again to undo this action.

| Again select both the objects. Go to '''Path menu''' and click on '''Intersection '''and observe the change in the shape.

 

|  Press '''Ctrl + Z '''again to undo this action.

|Again select both objects. Go to '''Path menu '''and click on '''Exclusion.'''  

|  Once again select both objects. Go to '''Path menu '''and click on '''Division.'''  

|Now press '''Ctrl + Z''' twice to undo these actions.

|  Select both objects again. Go to '''Path''' '''menu '''and click on '''Cut path. '''

|'''Cut path''' option works only if the object has stroke. Unselect the shapes first.  

|Now, select any one of the strokes and move it aside to make the cut path visible.

| Let us summarize. In this tutorial, we learnt about  

| Layers  

 

| Filters and Boolean Operations

| Here are 4 assignments for you

| Draw a 2 circles.

| Select both and use Difference.

|* Draw an ellipse.  

|Cut the crescent shape and paste in crescent layer.

| In a similar way do for the star shape.

| The Spoken Tutorial Project Team conducts workshops using spoken tutorials and gives certificates on passing online tests.

| Spoken Tutorial Project is supported by the National Mission on Education through ICT, MHRD, Government of India.

|More information on this Mission is available at the link shown.

|This is Arthi and Saurabh from IIT Bombay, signing off.  

 

 

Thanks for joining.