Creating Live Path Effects - Revision history

Kris: cat

2012-02-28T22:05:23Z

cat

← Older revision		Revision as of 22:05, 28 February 2012
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	*[[Latice Deformation]]		*[[Latice Deformation]]

	~~{{DevDiscussion}}~~		[[Category:Developer Documentation]]
	[[Category:LPE]]		[[Category:LPE]]

2012-02-28T22:03:35Z

cat

← Older revision		Revision as of 22:03, 28 February 2012
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	The parameters will automatically appear in the Live Path Effects dialog!		The parameters will automatically appear in the Live Path Effects dialog!

	~~[[Category:Developer Documentation]]~~

	=LPE on group : get the entire bounding box=		=LPE on group : get the entire bounding box=
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	*[[Envelope Deformation]]		*[[Envelope Deformation]]
	*[[Latice Deformation]]		*[[Latice Deformation]]

			{{DevDiscussion}}
			[[Category:LPE]]

2010-06-13T18:40:36Z

Groundwork

← Older revision		Revision as of 18:40, 13 June 2010
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	It is best to put your new effect in the /live_effects directory. Copy lpe-skeleton.cpp and lpe-skeleton.h to your files (say lpe-youreffect.cpp and lpe-youreffect.h), and rename everything from <i>skeleton</i> to your name.		It is best to put your new effect in the /live_effects directory. Copy lpe-skeleton.cpp and lpe-skeleton.h to your files (say lpe-youreffect.cpp and lpe-youreffect.h), and rename everything from <i>skeleton</i> to your name.

	In effect.h:		In effect-enum.h:
	Add your effect to the enumeration: "enum EffectType". This way, Inkscape knows how to refer to your effect.		Add your effect to the enumeration: "enum EffectType". This way, Inkscape knows how to refer to your effect.

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	That's all! Now your effect should pop up in the LivePathEffect dialog in Inkscape! But your effect won't do anything now, it would just pass along the original path. Time to start writing the main machinery of your cool effect!		That's all! Now your effect should pop up in the LivePathEffect dialog in Inkscape! But your effect won't do anything now, it would just pass along the original path. Time to start writing the main machinery of your cool effect!



	=Write your effect=		=Write your effect=

2009-06-19T15:41:12Z

← Older revision	Revision as of 15:41, 19 June 2009
(No difference)

2008-06-03T22:40:31Z

Bounding box for LPE on groups

← Older revision		Revision as of 22:40, 3 June 2008
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	[[Category:Developer Documentation]]		[[Category:Developer Documentation]]

			=LPE on group : get the entire bounding box=
			Some effects, such as [[Bend_Path\|Bend Path]], need the information of the size of the entire Bounding Box of the item on which the effect is applied.

			How to get the Bounding box of the item ?

			in ''lpe-YourEffect.h :''

			#include "live_effects/lpegroupbbox.h"

			Then inherit from GroupBBoxEffect :

			class LPESkeleton : public Effect, GroupBBoxEffect {

			Now we can use the ''original_bbox(SPLPEItem *)'' method.
			When it is called, it stores the bounding box dimensions in ''Geom::Interval boundingbox_X'' and ''Geom::Interval boundingbox_Y''. So let's call it before the calculation of the effect :

			- Overload the ''doBeforeEffect'' method

			'''lpe-YourEffect.h''' :
			virtual void doBeforeEffect (SPLPEItem *lpeitem);

			'''lpe-YourEffect.cpp''' :
			void
			LPEBendPath::doBeforeEffect (SPLPEItem *lpeitem)
			{
			original_bbox(lpeitem);
			}

			And to set defaults values :

			- the ''reset Defaults'' method
			'''lpe-YourEffect.h :'''
			virtual void resetDefaults(SPItem * item);

			'''lpe-YourEffect.cpp :'''
			void
			LPEBendPath::resetDefaults(SPItem * item)
			{
			original_bbox(SP_LPE_ITEM(item));
			}

	=Examples and details=		=Examples and details=

2008-06-03T22:08:43Z

Examples:

← Older revision		Revision as of 22:08, 3 June 2008
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	[[Category:Developer Documentation]]		[[Category:Developer Documentation]]

	=Examples:=		=Examples and details=
	*[[Bend Path]]		*[[Bend Path]]
	*[[Envelope Deformation]]		*[[Envelope Deformation]]
			*[[Latice Deformation]]

2008-05-28T09:32:02Z

How they work:

← Older revision		Revision as of 09:32, 28 May 2008
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	[[Category:Developer Documentation]]		[[Category:Developer Documentation]]

	=~~How they work~~:=		=Examples:=
	==Envelope Deformation==		*[[Bend Path]]
			*[[Envelope Deformation]]

2008-05-28T09:28:27Z

How they work:

2008-05-28T09:27:28Z

Current Projects

← Older revision		Revision as of 09:27, 28 May 2008
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	That's all! Now your effect should pop up in the LivePathEffect dialog in Inkscape! But your effect won't do anything now, it would just pass along the original path. Time to start writing the main machinery of your cool effect!		That's all! Now your effect should pop up in the LivePathEffect dialog in Inkscape! But your effect won't do anything now, it would just pass along the original path. Time to start writing the main machinery of your cool effect!

	~~=Current Projects=~~
	*[[Deformation Envelope LPE]]

	*[[Perspective LPE]]

	*[[LPE for groups]]

	*[[LPE stacking]]

	=Write your effect=		=Write your effect=

2008-05-28T09:26:59Z

Parameter types:

← Older revision		Revision as of 09:26, 28 May 2008
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	[[Category:Developer Documentation]]		[[Category:Developer Documentation]]

			=How they work:=