LPE: Ellipse from Points - Revision history

Schwieni: renewed examples with Perspective circle and Steiner ellipses

2019-03-24T13:16:17Z

renewed examples with Perspective circle and Steiner ellipses

← Older revision		Revision as of 13:16, 24 March 2019
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	[[File:Pts2ellipseTests.png]]		[[File:Pts2ellipseTests.png]]

	[https://gitlab.com/inkscape/inkscape/uploads/~~2381a1062e7bcff73baf77bcb04ffea4~~/pts2ellipseTests.svg Example svg file for inkscape]		[https://gitlab.com/inkscape/inkscape/uploads/0d3c0b065251a2ce4c910cdcf2996139/pts2ellipseTests.svg Example svg file for inkscape]

	[https://gitlab.com/inkscape/inkscape/uploads/~~2ddc8206c932c8b9ff71f49760597435~~/pts2ellipseTests.pdf Example saved as pdf file]		[https://gitlab.com/inkscape/inkscape/uploads/ed8a1f823d401c498249033d492e53de/pts2ellipseTests.pdf Example saved as pdf file]

Schwieni: renewed examples with Perspective circle and Steiner ellipses

2019-03-24T13:10:38Z

renewed examples with Perspective circle and Steiner ellipses

← Older revision		Revision as of 13:10, 24 March 2019
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	[[File:Pts2ellipseTests.png]]		[[File:Pts2ellipseTests.png]]

	[https://gitlab.com/inkscape/inkscape/uploads/~~41a327df5da6bf5688c51dc7173c2e00~~/pts2ellipseTests.svg Example svg file for inkscape]		[https://gitlab.com/inkscape/inkscape/uploads/2381a1062e7bcff73baf77bcb04ffea4/pts2ellipseTests.svg Example svg file for inkscape]

	[https://gitlab.com/inkscape/inkscape/uploads/~~80f695eca7ffa454932ddd45ac4619d3~~/pts2ellipseTests.pdf Example saved as pdf file]		[https://gitlab.com/inkscape/inkscape/uploads/2ddc8206c932c8b9ff71f49760597435/pts2ellipseTests.pdf Example saved as pdf file]

Schwieni: new: Perspective circle and Steiner ellipses

2019-03-24T12:14:29Z

new: Perspective circle and Steiner ellipses

← Older revision		Revision as of 12:14, 24 March 2019
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	# '''Method:''' select from		# '''Method:''' select from
	## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.		## '''Auto ellipse:''' if the path contains 2...4 nodes (or points), a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.
	## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.		## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.
	## '''Isometric circle:''' uses the first 2 edges to construct an isometric ellipse.		## '''Isometric circle:''' uses the first 2 edges to construct an isometric ellipse.
	# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!		## '''Perspective circle:''' uses the first 4 nodes to construct an ellipse representing the circle inside the square viewed under perspective.
	# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).		## '''Steiner ellipse:''' uses the first 3 nodes to construct an ellipse around the triangle. See also [https://en.wikipedia.org/wiki/Steiner_ellipse]
	# '''Slice Arc:''' if checked, generates a sliced arc (only has an effect when Arc is selected).		## '''Steiner inellipse:''' identical to Steiner ellipse, however the ellipse is now inside the triangle.
	# '''Frame (isometric rectangle):''' if checked, generates an isometric rectangle  – a frame  – around the ellipse.		# '''Arc:''' (only applicable to '''Auto ellipse''' and '''Force circle''' methods) if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!
	# '''Axes:''' if checked, generates the (main) axes of the ellipse.		# '''Other Arc side:''' (only enabled if '''Arc''' is checked) if checked, uses the opposite side for the arc (only has an effect when Arc is selected).
			# '''Slice Arc:''' (only enabled if '''Arc''' is checked) if checked, generates a sliced arc (only has an effect when Arc is selected).
			# '''Frame (isometric rectangle):''' if checked, generates an isometric rectangle  – a frame  – around the ellipse. Rotates according to '''Axes rotation''' parameter.
			# '''Axes:''' if checked, generates the (main) axes of the ellipse. Rotates according to '''Axes rotation''' parameter.
			# '''Perspective square:''' (only enabled if '''Perspective circle''' is used) if checked, generates the square viewed under perspective. Rotates according to '''Axes rotation''' parameter in the correct perspective.
			# '''Perspective axes:''' (only enabled if '''Perspective circle''' is used) if checked, generates the axes of the circle. Rotates according to '''Axes rotation''' parameter in the correct perspective.
	# '''Axes rotation:''' rotates the whole ellipse including the resulting nodes, frame and axes (unit: [deg]).		# '''Axes rotation:''' rotates the whole ellipse including the resulting nodes, frame and axes (unit: [deg]).
	# '''Source Path:''' if checked, generates the source path. This is useful for modifying the source path and hence the resulting ellipse.		# '''Source Path:''' if checked, generates the source path. This is useful for modifying the source path and hence the resulting ellipse.

Schwieni: link to current test file

2018-03-25T20:01:54Z

link to current test file

← Older revision		Revision as of 20:01, 25 March 2018
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	[[File:Pts2ellipseTests.png]]		[[File:Pts2ellipseTests.png]]

	[https://gitlab.com/inkscape/inkscape/uploads/~~e37cc175c784ecf697c7b1c1205528ad~~/pts2ellipseTests.svg Example svg file for inkscape]		[https://gitlab.com/inkscape/inkscape/uploads/41a327df5da6bf5688c51dc7173c2e00/pts2ellipseTests.svg Example svg file for inkscape]

	[https://gitlab.com/inkscape/inkscape/uploads/~~629fb2a1130a697e5569fd4aa39905a5~~/pts2ellipseTests.pdf Example saved as pdf file]		[https://gitlab.com/inkscape/inkscape/uploads/80f695eca7ffa454932ddd45ac4619d3/pts2ellipseTests.pdf Example saved as pdf file]

Schwieni: typos corrected

2018-03-25T19:44:28Z

typos corrected

← Older revision		Revision as of 19:44, 25 March 2018
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	## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.		## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.
	## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.		## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.
	## '''~~Isonometric~~ circle:''' uses the first 2 edges to construct an ~~isonometric~~ ellipse.		## '''Isometric circle:''' uses the first 2 edges to construct an isometric ellipse.
	# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!		# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!
	# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).		# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).
	# '''Slice Arc:''' if checked, generates a sliced arc (only has an effect when Arc is selected).		# '''Slice Arc:''' if checked, generates a sliced arc (only has an effect when Arc is selected).
	# '''Frame (~~isonometric~~ rectangle):''' if checked, generates an ~~isonometric~~ rectangle  – a frame  – around the ellipse.		# '''Frame (isometric rectangle):''' if checked, generates an isometric rectangle  – a frame  – around the ellipse.
	# '''Axes:''' if checked, generates the (main) axes of the ellipse.		# '''Axes:''' if checked, generates the (main) axes of the ellipse.
	# '''Axes rotation:''' rotates the whole ellipse including the resulting nodes, frame and axes (unit: [deg]).		# '''Axes rotation:''' rotates the whole ellipse including the resulting nodes, frame and axes (unit: [deg]).
	# '''Source Path:''' if checked, generates the source path. This is useful for ~~modifing~~ the source path and hence the resulting ellipse.		# '''Source Path:''' if checked, generates the source path. This is useful for modifying the source path and hence the resulting ellipse.

	=== Examples ===		=== Examples ===

Schwieni: links to new files

2018-03-25T19:38:40Z

links to new files

← Older revision		Revision as of 19:38, 25 March 2018
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	[[File:Pts2ellipseTests.png]]		[[File:Pts2ellipseTests.png]]

	[https://gitlab.com/inkscape/inkscape/uploads/~~8fe0011ca8f3b528d303915a187b9c93~~/pts2ellipseTests.svg Example svg file for inkscape]		[https://gitlab.com/inkscape/inkscape/uploads/e37cc175c784ecf697c7b1c1205528ad/pts2ellipseTests.svg Example svg file for inkscape]

	[https://gitlab.com/inkscape/inkscape/uploads/~~dfc3681e39e303de4acbc42846565890~~/pts2ellipseTests.pdf Example saved as pdf file]		[https://gitlab.com/inkscape/inkscape/uploads/629fb2a1130a697e5569fd4aa39905a5/pts2ellipseTests.pdf Example saved as pdf file]

Schwieni: /* GUI Parameters */

2018-03-25T18:11:59Z

GUI Parameters

← Older revision		Revision as of 18:11, 25 March 2018
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	## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.		## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.
	## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.		## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.
	## '''Isonometric ~~ellipse~~:''' uses the first 2 edges to construct an isonometric ellipse.		## '''Isonometric circle:''' uses the first 2 edges to construct an isonometric ellipse.
	# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!		# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!
	# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).		# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).

Schwieni: /* GUI Parameters */

2018-03-25T18:11:36Z

GUI Parameters

← Older revision		Revision as of 18:11, 25 March 2018
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	# '''Method:''' select from		# '''Method:''' select from
	## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.		## '''Auto ellipse:''' if the path contains 2...4 nodes, a circle is created; if the path contains more than 5 nodes, an ellipse is created. Note, that a circle is properly defined with either 2 or 3 points and an ellipse requires at least 5 points.
	## '''~~Circle only~~:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.		## '''Force circle:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.
	## '''Isonometric ellipse:''' uses the first 2 edges to construct an isonometric ellipse.		## '''Isonometric ellipse:''' uses the first 2 edges to construct an isonometric ellipse.
	# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!		# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!

Schwieni: /* GUI Parameters */

2018-03-25T18:10:49Z

GUI Parameters

← Older revision		Revision as of 18:10, 25 March 2018
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	## '''Circle only:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.		## '''Circle only:''' similar to Auto Ellipse, but now a circle is always fitted. Requires a path with at least 2 nodes.
	## '''Isonometric ellipse:''' uses the first 2 edges to construct an isonometric ellipse.		## '''Isonometric ellipse:''' uses the first 2 edges to construct an isonometric ellipse.
	# '''Arc:''' if checked, generates an (open) elliptic arc.		# '''Arc:''' if checked, generates an (open) elliptic arc between the first and last node. Note, that for the fitting of the ellipse only the nodes of the input path count and not the order nor the form. So, going "backwards" is allowed. Just play by moving the nodes of the input path!
	# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).		# '''Other Arc side:''' if checked, uses the opposite side for the arc (only has an effect when Arc is selected).
	# '''Slice Arc:''' if checked, generates a sliced arc (only has an effect when Arc is selected).		# '''Slice Arc:''' if checked, generates a sliced arc (only has an effect when Arc is selected).

Schwieni: /* Examples */

2018-03-25T17:59:14Z

Examples

← Older revision		Revision as of 17:59, 25 March 2018
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	=== Examples ===		=== Examples ===
			[[File:Pts2ellipseTests.png]]

	[https://gitlab.com/inkscape/inkscape/uploads/8fe0011ca8f3b528d303915a187b9c93/pts2ellipseTests.svg Example svg file]		[https://gitlab.com/inkscape/inkscape/uploads/8fe0011ca8f3b528d303915a187b9c93/pts2ellipseTests.svg Example svg file for inkscape]

	[https://gitlab.com/inkscape/inkscape/uploads/dfc3681e39e303de4acbc42846565890/pts2ellipseTests.pdf Example as pdf file]		[https://gitlab.com/inkscape/inkscape/uploads/dfc3681e39e303de4acbc42846565890/pts2ellipseTests.pdf Example saved as pdf file]