Phoenix Engine - Revision history

Poddus: added introduction

2015-02-12T11:41:10Z

added introduction

← Older revision		Revision as of 04:41, 12 February 2015
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	[[Category:Overgrowth]]		[[Category:Overgrowth]]
	<center>{{WQA in Progress}}</center>		<center>{{WQA in Progress}}</center>
	~~{{stub}}~~

	* This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.		''* This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features. If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.''

	~~If you have~~ the ~~time [[http://forums.wolfire.com/viewtopic~~.~~php?f=13&t=11935 SPF]] has~~ a ~~thread~~ with ~~links to some articles~~.		The Phoenix Game Engine is the core technology behind Overgrowth, and is being developed specifically for the game. It includes a built-in level editor, with which users can make and modify game levels.

			In order to achieve the desired fluidity in gameplay, the design principle behind the Phoenix engine emphasizes procedural generation of animation via keyframes and interpolation, and of sound effects through an ambient sound system.

			In large part as a means of simplifying modifications, a [[Scripting\|scripting system]] utilizing [http://www.angelcode.com/angelscript/ AngelScript] is deeply integrated into the game engine, which allows for control over various engine features.

	= Particle Effects =		= Particle Effects =

Poddus: Merged Effects System

2015-02-12T11:25:04Z

Merged Effects System

← Older revision		Revision as of 04:25, 12 February 2015
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	If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.		If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.


			= 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:

			== Simple Particle Example ==

			MakeParticle("Data/Particles/impactfast.xml",pos,vec3(0.0f));

			== Particle Stream Example ==
			float blood_force = sin(time_spurt_frequency)0.5f+0.5f;
			uint32 id = MakeParticle("Data/Particles/blooddrop.xml",bleed_pos,(head_transformvec3(0.0f,blood_amountblood_force,0.0f)+this_mo.velocity));
			if(last_blood_particle_id != 0){
			ConnectParticles(last_blood_particle_id, id);
			}
			last_blood_particle_id = id;

			= Post Processing Effects =
			''Post processing effects are image filters that are applied as a final step before each rendered frame is drawn to the screen -- much like Photoshop filters.'' This explanation is lifted word-for-word from David's blog post on the subject. He doesn't go into much detail about it in his blog posts, but here's links to [http://blog.wolfire.com/2009/04/post-processing-part-one/ part one] and [http://blog.wolfire.com/2009/04/post-processing-part-two/ part two] any way.

			= Shaders =
			Overgrowth uses GLSL shader language, and the users can create custom shaders. Some blog posts explain how some of the shaders work, such as the posts about [http://blog.wolfire.com/2008/12/object-lighting-part-1/ Object Lightning], [http://blog.wolfire.com/2009/09/character-rim-lighting/ Character Rim Lighting] and [http://blog.wolfire.com/2009/09/trees-in-the-breeze/ Trees in the Breeze]. Overgrowth's character animation is also done through a shader, as David mentioned in [http://blog.wolfire.com/2009/10/character-normal-maps/#comment-18448230 a blog comment].

			The skeletal animation is done in the vertex shader anyway, so it's actually
			faster and smoother-looking to just apply the bone matrices to the object-space
			normal map than it is to recalculate transformed normals and tangents for
			each vertex.


			= Motion Blur for Weapons =
			Overgrowth's weapons use motion blur based on stippling. Stippling is also used to render soft shadows, and the technique of stippling is explained in [http://blog.wolfire.com/2009/10/transparent-shadows-using-stippling/ this old blog post]. The motion blur for weapons works by drawing the weapon several times along it spath using different stipple patterns for each instance, as mentioned in the [http://blog.wolfire.com/2011/06/Overgrowth-a135-video-changelog A135 video].

			= Relevant blog posts =

			[http://blog.wolfire.com/2010/12/Overgrowth-graphics-overview A summary] of most blog posts explaining Overgrowth's graphical features, focusing on more technical details. There are additional links below, some of which are not mentioned in the summary.

			http://blog.wolfire.com/2008/12/object-lighting-part-1/
			http://blog.wolfire.com/2010/02/Gamma-correct-lighting

			http://blog.wolfire.com/2009/09/character-rim-lighting/
			http://blog.wolfire.com/2009/10/character-normal-maps/
			http://blog.wolfire.com/2009/09/soft-normal-maps-for-fur/

			http://blog.wolfire.com/2009/09/trees-in-the-breeze/
			http://blog.wolfire.com/2010/10/Imposters

			http://blog.wolfire.com/2009/05/decals-editor-part-one/
			http://blog.wolfire.com/2009/05/decals-editor-part-two/
			http://blog.wolfire.com/2009/06/decals-editor-part-three/

			[[Category: Tutorials]]
			[[Category: Modding]]
			[[Category: Overgrowth]]

Conner36 at 02:15, 17 June 2011

2011-06-17T02:15:01Z

← Older revision		Revision as of 19:15, 16 June 2011
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	[[Category:Overgrowth]]		[[Category:Overgrowth]]
	~~[[Category:Graphics]]~~
	<center>{{WQA in Progress}}</center>		<center>{{WQA in Progress}}</center>
	{{stub}}		{{stub}}

Conner36 at 20:58, 16 June 2011

2011-06-16T20:58:38Z

← Older revision		Revision as of 13:58, 16 June 2011
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	{{stub}}		{{stub}}

	~~MISLABELED THE PAGE SHOULD BE LABELED OG GRAPHICS NOT THE GENERIC GRAPHICS~~		* This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.
	~~(fix in to-do list as well)~~

	This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.

	If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.		If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.

Conner36: Graphics moved to Phoenix Engine: graphics was too generic

2011-06-16T20:56:11Z

Graphics moved to Phoenix Engine: graphics was too generic

← Older revision	Revision as of 13:56, 16 June 2011
(No difference)

Conner36 at 09:37, 16 June 2011

2011-06-16T09:37:56Z

← Older revision		Revision as of 02:37, 16 June 2011
Line 1:		Line 1:
	~~{{stub}}~~
	[[Category:Overgrowth]]		[[Category:Overgrowth]]
	[[Category:Graphics]]		[[Category:Graphics]]
			<center>{{WQA in Progress}}</center>
			{{stub}}

	MISLABELED THE PAGE SHOULD BE LABELED OG GRAPHICS NOT THE GENERIC GRAPHICS		MISLABELED THE PAGE SHOULD BE LABELED OG GRAPHICS NOT THE GENERIC GRAPHICS

Conner36 at 09:30, 16 June 2011

2011-06-16T09:30:55Z

← Older revision		Revision as of 02:30, 16 June 2011
Line 2:		Line 2:
	[[Category:Overgrowth]]		[[Category:Overgrowth]]
	[[Category:Graphics]]		[[Category:Graphics]]

			MISLABELED THE PAGE SHOULD BE LABELED OG GRAPHICS NOT THE GENERIC GRAPHICS
			(fix in to-do list as well)

	This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.		This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.

	If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.		If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.

Conner36: New page: {{stub}} Category:Overgrowth Category:Graphics This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features. If you have the...

2011-06-16T09:24:02Z

New page: {{stub}} Category:Overgrowth Category:Graphics This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features. If you have the...

New page

{{stub}}
[[Category:Overgrowth]]
[[Category:Graphics]]

This page needs a list of graphical features in OG with links to blog posts and short descriptions of the features.

If you have the time [[http://forums.wolfire.com/viewtopic.php?f=13&t=11935 SPF]] has a thread with links to some articles.