Particle Effects - Revision history

Constance: /* OGV-Based */ Added note declaring .ogv to be deprecated.

2022-07-12T21:32:50Z

OGV-Based: Added note declaring .ogv to be deprecated.

← Older revision		Revision as of 14:32, 12 July 2022
Line 22:		Line 22:
	===OGV-Based===		===OGV-Based===
	One Particle Effect is based on .ogv files found under Data/Textures/anims/ (though they are not referenced as .ogv but as .xml files in the Particle XML)		One Particle Effect is based on .ogv files found under Data/Textures/anims/ (though they are not referenced as .ogv but as .xml files in the Particle XML)

			This format is deprecated and no longer works.

	<!--bigexplosion.xml-->		<!--bigexplosion.xml-->

Silverfish: /* OGV-Based */ Removed information about the floats being between 1 and 0, corrected explanation of how inertia works.

2015-09-11T12:46:54Z

OGV-Based: Removed information about the floats being between 1 and 0, corrected explanation of how inertia works.

← Older revision		Revision as of 05:46, 11 September 2015
Line 49:		Line 49:
	'''<color/>''' - This tag has a varying number of attributes, one for each channel (RGB + Alpha), while the Alpha Channel may be defined as a range, requiring two attributes, alpha_min and alpha_max ''Range? perhaps floating point values from 0.0 to 1.0''		'''<color/>''' - This tag has a varying number of attributes, one for each channel (RGB + Alpha), while the Alpha Channel may be defined as a range, requiring two attributes, alpha_min and alpha_max ''Range? perhaps floating point values from 0.0 to 1.0''

	'''<behavior/>''' - This tag has 5 attributes. ~~All are likely floating point values from 0.0 to 1.0~~		'''<behavior/>''' - This tag has 5 attributes.
	* inertia - ~~Rate at which~~ the particle slows ~~its initial speed~~		* inertia - If this is 1.0 the particle retains all speed, the lower the value the more the particle slows down over time
	* gravity - Degree with which a downwards gravitational force acts upon the particle		* gravity - Degree with which a downwards gravitational force acts upon the particle
	* wind - Degree with which wind effects the particle vector		* wind - Degree with which wind effects the particle vector

Silverfish: /* OGV-Based */ Removed notes with questions about if they are bounded. They are not bounded.

2015-09-11T12:42:19Z

OGV-Based: Removed notes with questions about if they are bounded. They are not bounded.

← Older revision		Revision as of 05:42, 11 September 2015
Line 53:		Line 53:
	* gravity - Degree with which a downwards gravitational force acts upon the particle		* gravity - Degree with which a downwards gravitational force acts upon the particle
	* wind - Degree with which wind effects the particle vector		* wind - Degree with which wind effects the particle vector
	* size_decay_rate - Rate at which the size of the particle decreases ~~''NOTE: is this value range bounded by 0 & 1?''~~		* size_decay_rate - Rate at which the size of the particle decreases per second.
	* opacity_decay_rate - Rate at which the alpha channel values of the particle ~~increase ''NOTE: is this value range bounded by 0 & 1?''~~		* opacity_decay_rate - Rate at which the alpha channel values of the particle decreases in seconds.

	===Texture-Based===		===Texture-Based===

Silverfish: /* OGV-Based */ Added missing information about soft particles.

2015-09-11T12:40:23Z

OGV-Based: Added missing information about soft particles.

← Older revision		Revision as of 05:40, 11 September 2015
Line 43:		Line 43:
	* animation_effect - this is the only attribute specific to ogv-based particles and references the file path, starting from the Data folder, to a video file. ''NOTE: for some reason, as of a209, the files referenced are xml format, however all files under Data/Textures/anims/ are ogv format. Is the reference is a typo?''		* animation_effect - this is the only attribute specific to ogv-based particles and references the file path, starting from the Data folder, to a video file. ''NOTE: for some reason, as of a209, the files referenced are xml format, however all files under Data/Textures/anims/ are ogv format. Is the reference is a typo?''
	* shader - the name (not including file extension, typically .frag) of the shader in folder Data/GLSL/		* shader - the name (not including file extension, typically .frag) of the shader in folder Data/GLSL/
	* soft_shader - ?? usually just the name of the shader with the word "soft" appended to the end.		* soft_shader - The shader used when soft particles are on, usually just the name of the shader with the word "soft" appended to the end.

	'''<size/>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. Can also be defined by "min" and "max" attributes, see Texture-Based Particle below ''NOTE: Units are unknown''		'''<size/>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. Can also be defined by "min" and "max" attributes, see Texture-Based Particle below ''NOTE: Units are unknown''
Line 55:		Line 55:
	* size_decay_rate - Rate at which the size of the particle decreases ''NOTE: is this value range bounded by 0 & 1?''		* size_decay_rate - Rate at which the size of the particle decreases ''NOTE: is this value range bounded by 0 & 1?''
	* opacity_decay_rate - Rate at which the alpha channel values of the particle increase ''NOTE: is this value range bounded by 0 & 1?''		* opacity_decay_rate - Rate at which the alpha channel values of the particle increase ''NOTE: is this value range bounded by 0 & 1?''


	===Texture-Based===		===Texture-Based===

Poddus at 22:03, 13 February 2015

2015-02-13T22:03:43Z

← Older revision		Revision as of 15:03, 13 February 2015
Line 1:		Line 1:
	There isn't much information released about Overgrowth's particle system. Running or jumping on the ground creates small dust clouds at the characters' feet, and particle streams were added in [http://blog.wolfire.com/2011/04/Overgrowth-a128-video-changelog A128] along with blood dripping. Particles are controlled through scripts, examples below:		There isn't much information released about Overgrowth's particle system. Running or jumping on the ground creates small dust clouds at the characters' feet, and particle streams were added in [http://blog.wolfire.com/2011/04/Overgrowth-a128-video-changelog A128] along with blood dripping. Particles are controlled through scripts, examples below.

	==Simple Particle Example==		==Simple Particle Example==
Line 45:		Line 45:
	* soft_shader - ?? usually just the name of the shader with the word "soft" appended to the end.		* soft_shader - ?? usually just the name of the shader with the word "soft" appended to the end.

	'''<size/>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. ''NOTE: Units are unknown''		'''<size/>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. Can also be defined by "min" and "max" attributes, see Texture-Based Particle below ''NOTE: Units are unknown''

	'''<color/>''' - This tag has a varying number of attributes, one for each channel (RGB + Alpha), while the Alpha Channel may be defined as a range, requiring two attributes, alpha_min and alpha_max ''Range? perhaps floating point values from 0.0 to 1.0''		'''<color/>''' - This tag has a varying number of attributes, one for each channel (RGB + Alpha), while the Alpha Channel may be defined as a range, requiring two attributes, alpha_min and alpha_max ''Range? perhaps floating point values from 0.0 to 1.0''
Line 77:		Line 77:
	</particle>		</particle>
	</pre>		</pre>

			'''<textures/>''' - With texture-based particles, the "animation_effect" attribute has been replaced by two different ones
			* color_map - Path to a file in .tga format. ''Note: Constraints? Do textures need to be square, does their size need to be a power of two?
			* normal_map - Path to a file in .tga format.

	= Relevant blog posts =		= Relevant blog posts =

Poddus at 20:26, 13 February 2015

2015-02-13T20:26:54Z

← Older revision		Revision as of 13:26, 13 February 2015
Line 1:		Line 1:
	~~= Particle Effects =~~
	There isn't much information released about Overgrowth's particle system. Running or jumping on the ground creates small dust clouds at the characters' feet, and particle streams were added in [http://blog.wolfire.com/2011/04/Overgrowth-a128-video-changelog A128] along with blood dripping. Particles are controlled through scripts, examples below:		There isn't much information released about Overgrowth's particle system. Running or jumping on the ground creates small dust clouds at the characters' feet, and particle streams were added in [http://blog.wolfire.com/2011/04/Overgrowth-a128-video-changelog A128] along with blood dripping. Particles are controlled through scripts, examples below:

Poddus: split post processing effects into separate article

2015-02-13T20:26:17Z

split post processing effects into separate article

@@ Line 78: / Line 78: @@
 </particle>
 </pre>
 = Relevant blog posts =

Poddus: moved Effects System to Particle Effects: Split Particle Effects and Post-Processing Effects into separate Articles

2015-02-13T20:13:57Z

moved Effects System to Particle Effects: Split Particle Effects and Post-Processing Effects into separate Articles

← Older revision	Revision as of 13:13, 13 February 2015
(No difference)

Poddus at 20:12, 13 February 2015

2015-02-13T20:12:56Z

← Older revision		Revision as of 13:12, 13 February 2015
Line 43:		Line 43:
	'''<textures/>''' - This tag has 3 attributes.		'''<textures/>''' - This tag has 3 attributes.
	* animation_effect - this is the only attribute specific to ogv-based particles and references the file path, starting from the Data folder, to a video file. ''NOTE: for some reason, as of a209, the files referenced are xml format, however all files under Data/Textures/anims/ are ogv format. Is the reference is a typo?''		* animation_effect - this is the only attribute specific to ogv-based particles and references the file path, starting from the Data folder, to a video file. ''NOTE: for some reason, as of a209, the files referenced are xml format, however all files under Data/Textures/anims/ are ogv format. Is the reference is a typo?''
			* shader - the name (not including file extension, typically .frag) of the shader in folder Data/GLSL/
			* soft_shader - ?? usually just the name of the shader with the word "soft" appended to the end.

	* shader - the ~~name~~ (~~not including file extension, typically .frag~~) of the ~~shader in folder Data/GLSL~~/		'''<size/>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. ''NOTE: Units are unknown''

			'''<color/>''' - This tag has a varying number of attributes, one for each channel (RGB + Alpha), while the Alpha Channel may be defined as a range, requiring two attributes, alpha_min and alpha_max ''Range? perhaps floating point values from 0.0 to 1.0''

	* ~~soft_shader~~ - ~~?? usually just~~ the ~~name~~ of the ~~shader with~~ the ~~word "soft" appended to~~ the ~~end.~~		'''<behavior/>''' - This tag has 5 attributes. All are likely floating point values from 0.0 to 1.0
			* inertia - Rate at which the particle slows its initial speed
			* gravity - Degree with which a downwards gravitational force acts upon the particle
			* wind - Degree with which wind effects the particle vector
			* size_decay_rate - Rate at which the size of the particle decreases ''NOTE: is this value range bounded by 0 & 1?''
			* opacity_decay_rate - Rate at which the alpha channel values of the particle increase ''NOTE: is this value range bounded by 0 & 1?''

	~~'''<size>''' - This tag uses the attribute "val" (floating point number) to specify the size of the particle. ''NOTE: Units are unknown''~~

	===Texture-Based===		===Texture-Based===

Poddus: added section on File Structure

2015-02-13T20:01:43Z

added section on File Structure

@@ Line 2: / Line 2: @@
 There isn't much information released about Overgrowth's particle system. Running or jumping on the ground creates small dust clouds at the characters' feet, and particle streams were added in [http://blog.wolfire.com/2011/04/Overgrowth-a128-video-changelog A128] along with blood dripping. Particles are controlled through scripts, examples below:
-== Simple Particle Example ==
+==Simple Particle Example==
-            MakeParticle("Data/Particles/impactfast.xml",pos,vec3(0.0f));
+==Particle Stream Example==
 = Post Processing Effects =