Community Roadmap

2008-09-01T20:31:05Z

Ddd:

Community Roadmap

2008-09-01T20:30:29Z

Ddd:

Community Roadmap - Compressed Texture Support

2008-09-01T20:18:18Z

Ddd: /* Discussion */

=== Goals ===
Load textures in a variety of compressed formats: DXT/S3TC, PVRTC, ETC for now.
=== OpenGL tokens ===
<pre>GL_EXT_texture_compression_s3tc

GL_COMPRESSED_RGB_S3TC_DXT1_EXT
GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
GL_COMPRESSED_RGBA_S3TC_DXT5_EXT

GL_IMG_texture_compression_pvrtc

GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG
GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG
GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG

GL_OES_compressed_ETC1_RGB8_texture

GL_ETC1_RGB8_OES</pre>
=== Discussion ===
I was initially going to add support for compressed textures directly to the existing texture loading functions, but given the differences in the way compressed textures are handled, this is not feasible. I plan to add a set of functions dedicated to loading compressed textures directly.

However, there are a few points in need of discussion:

'''Fallbacks:''' Although S3TC is present on all recent desktop hardware, PVRTC and ETC are specific to their respective hardware vendors, neither of which support S3TC.
Do we provide a fallback which decompresses these formats in software if they are not supported by the current hardware?
Do we provide a way for the application to query the supported compression formats at runtime?

'''Containers:''' Several of these formats have multiple containers, and some containers can contain multiple compression schemes.
Which format/container combination do we want to support?

'''>> Follow discussion on forum:''' [http://horde3d.org/forums/viewtopic.php?f=8&t=389 Texture Compression thread]

Template:Filmstrip

2008-08-27T17:33:53Z

Ddd:

File:Arrow right.gif

2008-08-27T17:32:24Z

Ddd: uploaded a new version of "Image:Arrow right.gif"

File:Arrow left.gif

2008-08-27T17:31:49Z

Ddd: uploaded a new version of "Image:Arrow left.gif"

Community Roadmap

2008-08-27T11:51:33Z

Ddd: Keep the nbsps otherwise rows will not be colored properlly. This is in need of a total styling.

Community Roadmap

2008-08-27T11:48:14Z

Ddd:

Community Roadmap

2008-08-27T11:47:41Z

Ddd: Reverted edits by Reiko (Talk); changed back to last version by Ddd

MediaWiki:Portal

2008-08-27T02:28:15Z

Ddd: New page: Community Portal

Community Portal

MediaWiki:Sidebar

2008-08-27T02:27:17Z

Ddd:

MediaWiki:Sidebar

2008-08-27T02:24:02Z

MediaWiki:Roadmap-url

2008-08-27T02:21:39Z

Ddd: New page: Community Roadmap

Community Roadmap

2008-08-27T02:16:01Z

Ddd: needs allot of formating

Main Page

2008-08-27T02:00:24Z

Ddd: moving Current Events page to community roadmap

__NOEDITSECTION__ __NOTOC__
{| width="800" border="0"
| colspan="2" | 

{{ContentBlock|width=806|color=orange
|content=
'''Welcome to the wiki for the open source next-generation graphics engine Horde3D.'''

This wiki collects information about how to make best use of the numerous features of Horde3D. Since it is a collaborative effort to which all community members are invited to contribute, the Horde3D team does not take any responsibility for the content or the accuracy of the content provided on these pages.
}}
{{SpacerBlock}}
{{ContentBlock|width=806|thickness=2 |color=#BFBFBF
|content=
{{Filmstrip}}
|description= [[Gallery]]: Here are a few of the [[samples]], add your own and get famous. [[Gallery|more...]]
}}
{{SpacerBlock}}
|-
|valign="top" | 
{{ContentBlock|width=500|color=#FF9900
|icon=InfoIcon.png
|iconsize=32
|halign=top
|header=Getting Started
|sub-header=Start here to learn all the H3D basics.
|content={{!!}}
* [http://www.horde3d.org/features.html Features supported by Horde3D.]
* [http://www.horde3d.org/screenshots.html Screenshots of sample applications created with Horde3D.]
* [http://www.horde3d.org/docs/_tutorial.html A small introductory tutorial which shows the API style.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=DevIcon.png
|iconsize=32
|halign=top
|header=Using Horde
|sub-header=Practical usage of the engine.
|content={{!!}}
* [http://www.horde3d.org/docs/_usageguide.html#Concepts Introduction to basic concepts.]
* [http://www.horde3d.org/docs/_usageguide.html#Content Advice for bringing content to the engine.]
* [http://www.horde3d.org/docs/_usageguide.html#Advanced Introduction to more advanced topics.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FF9900
|icon=ResourcesIcon.png
|iconsize=32
|halign=top
|header=Resources
|sub-header=Explore the website, forums, and [[Horde3D_Wiki:Community_Portal| Community Portal]].
|content={{!!}}
* [[Horde3D_Wiki:Community_Portal | The Community Portal Tutorials.]]
* [http://www.horde3d.org/ Official Horde3D Website.]
* [http://www.horde3d.org/forums/ Forums for discussions and support.]
* [http://www.horde3d.org/docs/manual.html Horde3D Manual.]
* [http://mm-werkstatt.informatik.uni-augsburg.de/project_details.php?id=45 Official Horde3D Editor]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=HighlightIcon.png
|iconsize=32
|header=Project Spotlights
|sub-header=This Month: Official Horde3D Editor.
|content={{!!}}
[[Image:H3Deditor.jpg|frame|left|H3D Editor]]
*[[Editor Features]]
*[[Editor Tutorials]]
*[[Future Enhancements]]
}}

|valign="top" | 
{{ContentBlock|width=300|header=Download Horde3D|icon=Download45.png |sub-header=Stable Release: v1.0 beta1
|center=true
|content=
'''Get [[Distribution]]'''

<html>
<a href="http://downloads.sourceforge.net/horde3d/Horde3D_SDK_1.0.0_Beta1.zip" ><img src="http://www.horde3d.org/wiki/images/6/66/WinXP80.png"></a>
<a href="http://www.mediafire.com/?csrwjww9dhe" ><img src="http://www.horde3d.org/wiki/images/6/60/MacOSX80.png"></a>
<a href="http://www.horde3d.org/downloads/Horde3D%20SDK%20%5B0.15.0%5D.zip" ><img src="http://www.horde3d.org/wiki/images/3/3d/Ubunto80.png"></a>
</html>

'''Get [[SVN Source Instructions]]'''
{{SpacerBlock|294|2|color=#FF9900}}
{{ContentBlock|width=300|width=294 |thickness=0 |content-color=#FFFFCC
|center=true
|content=
'''[[Language Bindings]]:'''

[[JavaBindings|Java]] • [[dotNETBindings|.NET]] • [[DBindings|Digitalmars D]] • [[PyBindings|Python]]
}}
{{SpacerBlock|294|1|color=#FF9900}}
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=300|
|icon=DevIcon45.png
|header=[[Development | Horde3D Development]]
|sub-header=[[Community Roadmap | Community Roadmap]]
|content-color=#FFFFCC
|content=
These pages are only of interest to developers who are modifying Horde itself, or developing extensions.
=== [[Hardware]] ===
*[[ATI Development]] - Issues specific to ATI Cards
*[[NVidia Development]] - Issues specific to NVidia Cards
=== [[Platforms]] ===
*[[Windows Development]] - Issues specific to Microsoft Windows.
*[[Linux Development]] - Issues specific to Linux.
*[[Mac OS X Development]] - Issues specific to Mac OS X.
=== [[Extensions]] ===
*[[Terrain Extension]] - Adds Large Terrain support.
*[[Bullet Physics]] - Connects Bullet Physics Engine to Horde3D.
}}
|-
| colspan="2" | 

|}

Main Page

2008-08-27T01:53:30Z

Ddd: Changed protection level for "Main Page" [edit=sysop:move=sysop]

__NOEDITSECTION__ __NOTOC__
{| width="800" border="0"
| colspan="2" | 

{{ContentBlock|width=806|color=orange
|content=
'''Welcome to the wiki for the open source next-generation graphics engine Horde3D.'''

This wiki collects information about how to make best use of the numerous features of Horde3D. Since it is a collaborative effort to which all community members are invited to contribute, the Horde3D team does not take any responsibility for the content or the accuracy of the content provided on these pages.
}}
{{SpacerBlock}}
{{ContentBlock|width=806|thickness=2 |color=#BFBFBF
|content=
{{Filmstrip}}
|description= [[Gallery]]: Here are a few of the [[samples]], add your own and get famous. [[Gallery|more...]]
}}
{{SpacerBlock}}
|-
|valign="top" | 
{{ContentBlock|width=500|color=#FF9900
|icon=InfoIcon.png
|iconsize=32
|halign=top
|header=Getting Started
|sub-header=Start here to learn all the H3D basics.
|content={{!!}}
* [http://www.horde3d.org/features.html Features supported by Horde3D.]
* [http://www.horde3d.org/screenshots.html Screenshots of sample applications created with Horde3D.]
* [http://www.horde3d.org/docs/_tutorial.html A small introductory tutorial which shows the API style.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=DevIcon.png
|iconsize=32
|halign=top
|header=Using Horde
|sub-header=Practical usage of the engine.
|content={{!!}}
* [http://www.horde3d.org/docs/_usageguide.html#Concepts Introduction to basic concepts.]
* [http://www.horde3d.org/docs/_usageguide.html#Content Advice for bringing content to the engine.]
* [http://www.horde3d.org/docs/_usageguide.html#Advanced Introduction to more advanced topics.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FF9900
|icon=ResourcesIcon.png
|iconsize=32
|halign=top
|header=Resources
|sub-header=Explore the website, forums, and [[Horde3D_Wiki:Community_Portal| Community Portal]].
|content={{!!}}
* [[Horde3D_Wiki:Community_Portal | The Community Portal Tutorials.]]
* [http://www.horde3d.org/ Official Horde3D Website.]
* [http://www.horde3d.org/forums/ Forums for discussions and support.]
* [http://www.horde3d.org/docs/manual.html Horde3D Manual.]
* [http://mm-werkstatt.informatik.uni-augsburg.de/project_details.php?id=45 Official Horde3D Editor]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=HighlightIcon.png
|iconsize=32
|header=Project Spotlights
|sub-header=This Month: Official Horde3D Editor.
|content={{!!}}
[[Image:H3Deditor.jpg|frame|left|H3D Editor]]
*[[Editor Features]]
*[[Editor Tutorials]]
*[[Future Enhancements]]
}}

|valign="top" | 
{{ContentBlock|width=300|header=Download Horde3D|icon=Download45.png |sub-header=Stable Release: v1.0 beta1
|center=true
|content=
'''Get [[Distribution]]'''

<html>
<a href="http://downloads.sourceforge.net/horde3d/Horde3D_SDK_1.0.0_Beta1.zip" ><img src="http://www.horde3d.org/wiki/images/6/66/WinXP80.png"></a>
<a href="http://www.mediafire.com/?csrwjww9dhe" ><img src="http://www.horde3d.org/wiki/images/6/60/MacOSX80.png"></a>
<a href="http://www.horde3d.org/downloads/Horde3D%20SDK%20%5B0.15.0%5D.zip" ><img src="http://www.horde3d.org/wiki/images/3/3d/Ubunto80.png"></a>
</html>

'''Get [[SVN Source Instructions]]'''
{{SpacerBlock|294|2|color=#FF9900}}
{{ContentBlock|width=300|width=294 |thickness=0 |content-color=#FFFFCC
|center=true
|content=
'''[[Language Bindings]]:'''

[[JavaBindings|Java]] • [[dotNETBindings|.NET]] • [[DBindings|Digitalmars D]] • [[PyBindings|Python]]
}}
{{SpacerBlock|294|1|color=#FF9900}}
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=300|
|icon=DevIcon45.png
|header=[[Development | Horde3D Development]]
|sub-header=[[Current events | Current Events]]: v1.0
|content-color=#FFFFCC
|content=
These pages are only of interest to developers who are modifying Horde itself, or developing extensions.
=== [[Hardware]] ===
*[[ATI Development]] - Issues specific to ATI Cards
*[[NVidia Development]] - Issues specific to NVidia Cards
=== [[Platforms]] ===
*[[Windows Development]] - Issues specific to Microsoft Windows.
*[[Linux Development]] - Issues specific to Linux.
*[[Mac OS X Development]] - Issues specific to Mac OS X.
=== [[Extensions]] ===
*[[Terrain Extension]] - Adds Large Terrain support.
*[[Bullet Physics]] - Connects Bullet Physics Engine to Horde3D.
}}
|-
| colspan="2" | 

|}

Main Page

2008-08-27T01:53:05Z

Ddd: Changed protection level for "Main Page" [edit=autoconfirmed:move=autoconfirmed]

__NOEDITSECTION__ __NOTOC__
{| width="800" border="0"
| colspan="2" | 

{{ContentBlock|width=806|color=orange
|content=
'''Welcome to the wiki for the open source next-generation graphics engine Horde3D.'''

This wiki collects information about how to make best use of the numerous features of Horde3D. Since it is a collaborative effort to which all community members are invited to contribute, the Horde3D team does not take any responsibility for the content or the accuracy of the content provided on these pages.
}}
{{SpacerBlock}}
{{ContentBlock|width=806|thickness=2 |color=#BFBFBF
|content=
{{Filmstrip}}
|description= [[Gallery]]: Here are a few of the [[samples]], add your own and get famous. [[Gallery|more...]]
}}
{{SpacerBlock}}
|-
|valign="top" | 
{{ContentBlock|width=500|color=#FF9900
|icon=InfoIcon.png
|iconsize=32
|halign=top
|header=Getting Started
|sub-header=Start here to learn all the H3D basics.
|content={{!!}}
* [http://www.horde3d.org/features.html Features supported by Horde3D.]
* [http://www.horde3d.org/screenshots.html Screenshots of sample applications created with Horde3D.]
* [http://www.horde3d.org/docs/_tutorial.html A small introductory tutorial which shows the API style.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=DevIcon.png
|iconsize=32
|halign=top
|header=Using Horde
|sub-header=Practical usage of the engine.
|content={{!!}}
* [http://www.horde3d.org/docs/_usageguide.html#Concepts Introduction to basic concepts.]
* [http://www.horde3d.org/docs/_usageguide.html#Content Advice for bringing content to the engine.]
* [http://www.horde3d.org/docs/_usageguide.html#Advanced Introduction to more advanced topics.]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FF9900
|icon=ResourcesIcon.png
|iconsize=32
|halign=top
|header=Resources
|sub-header=Explore the website, forums, and [[Horde3D_Wiki:Community_Portal| Community Portal]].
|content={{!!}}
* [[Horde3D_Wiki:Community_Portal | The Community Portal Tutorials.]]
* [http://www.horde3d.org/ Official Horde3D Website.]
* [http://www.horde3d.org/forums/ Forums for discussions and support.]
* [http://www.horde3d.org/docs/manual.html Horde3D Manual.]
* [http://mm-werkstatt.informatik.uni-augsburg.de/project_details.php?id=45 Official Horde3D Editor]
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=500|color=#FFCC33
|icon=HighlightIcon.png
|iconsize=32
|header=Project Spotlights
|sub-header=This Month: Official Horde3D Editor.
|content={{!!}}
[[Image:H3Deditor.jpg|frame|left|H3D Editor]]
*[[Editor Features]]
*[[Editor Tutorials]]
*[[Future Enhancements]]
}}

|valign="top" | 
{{ContentBlock|width=300|header=Download Horde3D|icon=Download45.png |sub-header=Stable Release: v1.0 beta1
|center=true
|content=
'''Get [[Distribution]]'''

<html>
<a href="http://downloads.sourceforge.net/horde3d/Horde3D_SDK_1.0.0_Beta1.zip" ><img src="http://www.horde3d.org/wiki/images/6/66/WinXP80.png"></a>
<a href="http://www.mediafire.com/?csrwjww9dhe" ><img src="http://www.horde3d.org/wiki/images/6/60/MacOSX80.png"></a>
<a href="http://www.horde3d.org/downloads/Horde3D%20SDK%20%5B0.15.0%5D.zip" ><img src="http://www.horde3d.org/wiki/images/3/3d/Ubunto80.png"></a>
</html>

'''Get [[SVN Source Instructions]]'''
{{SpacerBlock|294|2|color=#FF9900}}
{{ContentBlock|width=300|width=294 |thickness=0 |content-color=#FFFFCC
|center=true
|content=
'''[[Language Bindings]]:'''

[[JavaBindings|Java]] • [[dotNETBindings|.NET]] • [[DBindings|Digitalmars D]] • [[PyBindings|Python]]
}}
{{SpacerBlock|294|1|color=#FF9900}}
}}
{{SpacerBlock|1|1}}
{{ContentBlock|width=300|
|icon=DevIcon45.png
|header=[[Development | Horde3D Development]]
|sub-header=[[Current events | Current Events]]: v1.0
|content-color=#FFFFCC
|content=
These pages are only of interest to developers who are modifying Horde itself, or developing extensions.
=== [[Hardware]] ===
*[[ATI Development]] - Issues specific to ATI Cards
*[[NVidia Development]] - Issues specific to NVidia Cards
=== [[Platforms]] ===
*[[Windows Development]] - Issues specific to Microsoft Windows.
*[[Linux Development]] - Issues specific to Linux.
*[[Mac OS X Development]] - Issues specific to Mac OS X.
=== [[Extensions]] ===
*[[Terrain Extension]] - Adds Large Terrain support.
*[[Bullet Physics]] - Connects Bullet Physics Engine to Horde3D.
}}
|-
| colspan="2" | 

|}

2008-04-21T04:17:43Z

Ddd:

I will put user information here, later.

[http://www.horde3d.org/forums/memberlist.php?mode=viewprofile&u=176 My Forum Profile]

Shading Technique - Dot Product Detail Texturing

2008-04-21T04:14:50Z

Ddd: uploaded images.

{| border="0"
| {{ContentBlock|width=800|color=white
|content={{!!}}
== Overview ==
'''Defining a detail texture:''' a texture that contains commonly occuring high frequency surface variations.

'''Why might you want to use this technique?'''<br/>
- As a fall-back for lower end hardware<br/>
- In circumstances where mid-ranged detail is more important than up close

== The Technique ==

'''Requirements:'''<BR/>
- RGB Color Map<BR/>
- RGBA Opacity/Blend Map<BR/>
- RGBA Composite Detail Textures<BR/>

{{CppSourceCode|
description= GLSL Code|
code=
<source lang="cpp" line="1">
vec3 col = texture2D(__ColorMap__, texCoords).rgb;
vec4 blend = texture2D(__BlendMap__, texCoords).rgba;
vec4 detVal = texture2D(__DetailComposite__, texCoords * 200.0).rgba;
float dotValue = dot(detVal, blend);
float sVal = 1.0 - (dotValue * 2.0);
col += (-sVal);
</source>}}

The objective of the technique is to use the channels of an RGBA image to hold four different grayscale detail texture maps which are extracted by the dot product of the vectors for the composite image and its corresponding RGBA blend, dominance, opacity, w/e map.

Because multiplication against a range of 0 to 1 can only reduce the brightness of a texture the consequence of repeating this with multiple blends and/or overlapping layers is that the surface will continually get darker. By transforming the detail from a range of 0 to 1 to a range of -1 to +1 addition can be used to make it possible to darken the texture by adding a negative value to it and lighten it by adding a positive value. The last five lines of the shader can be repeated for any number of blend and composite maps.

The line:

float sVal = 1.0 - (dotValue * 2.0);

accomplishes this objective, however it inverts the light and dark values making it necessary to add the opposite of "sVal" to invert it again so the textures will behave as expected.

The technique is very fast and ideal for use as a material fallback for machines with lower end hardware. With the addition of 1D color lookups for some of the detail maps it could also add small highlights such as flowers and sea-shells, this would require the addition of 1D textures to Horde3D, so it is not currently an option at the moment, but is worth thinking about.

{{CppSourceCode|
description= Full GLSL Fragment Shader for Terrain Lighting Context|
code=
<source lang="cpp" line="1">
uniform sampler2D tex0, tex1, tex2, tex3;
varying vec4 pos, vsPos;
varying vec2 texCoords;

void main( void )
{
vec3 colMap = texture2D( tex1, texCoords).rgb;
vec4 blendMap = texture2D(tex2, texCoords).rgba;
vec4 blendTex = texture2D(tex3, texCoords * 300.0).rgba;
float detResult = dot(blendTex, blendMap);
detResult = 1.0 - (detResult * 2.0);
colMap += (-detResult);

vec4 texel = texture2D( tex0, texCoords ) * 2.0 - 1.0;
float ny = sqrt( max( 1.0 - texel.b*texel.b - texel.a*texel.a, 0.0 ) );
vec3 normal = vec3( texel.b, ny, texel.a );

gl_FragColor.rgb =
calcPhongSpotLight( pos.xyz, normalize( normal ), colMap, 0.0, 16.0, -vsPos.z, 0.3 );
}</source>}}

== Example Result ==
[[Image:signeddetmappingmp3.jpg]]

== To-Do List for this Article ==
- Add more pictures<BR/>
- Figure out proper Wiki formating for code and lists<BR/>
- If in some spots something that isn't as clear as it could be, edit it or point it out please
- Posted by AcidFaucet, for fastest response in regards to this article: send a PM

}}
| valign="top" | {{Extension_Summary
|name = Technique - Texturing
|screenshot = Signeddetmappingmp3Thumb.jpg
|description = Using the dot product of vectors and signed textures for high frequency detail.
|version = 1.0
|horde3dversion = 1.0 beta
|released = 2008-04-20
|author = [http://www.horde3d.org/forums/memberlist.php?mode=viewprofile&u=128 AcidFaucet]|
}}
|}
[[category: Technique]]

File:Signeddetmappingmp3Thumb.jpg

2008-04-21T04:14:08Z

Ddd:

File:Signeddetmappingmp3.jpg

2008-04-21T04:10:08Z

Ddd:

Category:Technique

2008-04-21T04:08:56Z

Ddd: New page: Index of a collection of useful techniques.

Index of a collection of useful techniques.

Shading Technique - Dot Product Detail Texturing

2008-04-21T04:05:54Z

Ddd: Added some styling. Will create a set of templates for you all to use :)

{| border="0"
| {{ContentBlock|width=800|color=white
|content={{!!}}
== Overview ==
'''Defining a detail texture:''' a texture that contains commonly occuring high frequency surface variations.

'''Why might you want to use this technique?'''<br/>
- As a fall-back for lower end hardware<br/>
- In circumstances where mid-ranged detail is more important than up close

== The Technique ==

'''Requirements:'''<BR/>
- RGB Color Map<BR/>
- RGBA Opacity/Blend Map<BR/>
- RGBA Composite Detail Textures<BR/>

{{CppSourceCode|
description= GLSL Code|
code=
<source lang="cpp" line="1">
vec3 col = texture2D(__ColorMap__, texCoords).rgb;
vec4 blend = texture2D(__BlendMap__, texCoords).rgba;
vec4 detVal = texture2D(__DetailComposite__, texCoords * 200.0).rgba;
float dotValue = dot(detVal, blend);
float sVal = 1.0 - (dotValue * 2.0);
col += (-sVal);
</source>}}

The objective of the technique is to use the channels of an RGBA image to hold four different grayscale detail texture maps which are extracted by the dot product of the vectors for the composite image and its corresponding RGBA blend, dominance, opacity, w/e map.

Because multiplication against a range of 0 to 1 can only reduce the brightness of a texture the consequence of repeating this with multiple blends and/or overlapping layers is that the surface will continually get darker. By transforming the detail from a range of 0 to 1 to a range of -1 to +1 addition can be used to make it possible to darken the texture by adding a negative value to it and lighten it by adding a positive value. The last five lines of the shader can be repeated for any number of blend and composite maps.

The line:

float sVal = 1.0 - (dotValue * 2.0);

accomplishes this objective, however it inverts the light and dark values making it necessary to add the opposite of "sVal" to invert it again so the textures will behave as expected.

The technique is very fast and ideal for use as a material fallback for machines with lower end hardware. With the addition of 1D color lookups for some of the detail maps it could also add small highlights such as flowers and sea-shells, this would require the addition of 1D textures to Horde3D, so it is not currently an option at the moment, but is worth thinking about.

{{CppSourceCode|
description= Full GLSL Fragment Shader for Terrain Lighting Context|
code=
<source lang="cpp" line="1">
uniform sampler2D tex0, tex1, tex2, tex3;
varying vec4 pos, vsPos;
varying vec2 texCoords;

void main( void )
{
vec3 colMap = texture2D( tex1, texCoords).rgb;
vec4 blendMap = texture2D(tex2, texCoords).rgba;
vec4 blendTex = texture2D(tex3, texCoords * 300.0).rgba;
float detResult = dot(blendTex, blendMap);
detResult = 1.0 - (detResult * 2.0);
colMap += (-detResult);

vec4 texel = texture2D( tex0, texCoords ) * 2.0 - 1.0;
float ny = sqrt( max( 1.0 - texel.b*texel.b - texel.a*texel.a, 0.0 ) );
vec3 normal = vec3( texel.b, ny, texel.a );

gl_FragColor.rgb =
calcPhongSpotLight( pos.xyz, normalize( normal ), colMap, 0.0, 16.0, -vsPos.z, 0.3 );
}</source>}}

== Example Result ==
http://img245.imageshack.us/img245/1876/signeddetmappingmp3.jpg

== To-Do List for this Article ==
- Add more pictures<BR/>
- Figure out proper Wiki formating for code and lists<BR/>
- If in some spots something that isn't as clear as it could be, edit it or point it out please
- Posted by AcidFaucet, for fastest response in regards to this article: send a PM

}}
| valign="top" | {{Extension_Summary
|name = Technique - Texturing
|screenshot = H3DPlaceHolder.png
|description = Using the dot product of vectors and signed textures for high frequency detail.
|version = 1.0
|horde3dversion = 1.0 beta
|released = 2008-04-20
|author = [http://www.horde3d.org/forums/memberlist.php?mode=viewprofile&u=128 AcidFaucet]|
}}
|}
[[category: Technique]]

File:H3DCommandLine45.png

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Horde3D Wiki:Community portal

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MediaWiki:Common.css

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/* CSS placed here will be applied to all skins */
body.page-Main_Page h1.firstHeading { display:none; }

#dhtmlgoodies_slideshow {
width:800px; /* Total width of slideshow */
}
#galleryContainer {
position:relative;
overflow:hidden;
padding:0px;
height:150px;
}

#arrow_left {
position:absolute;
left:0px;
z-index:10;
padding:0px;
}
#arrow_right {
position:absolute;
right:0px;
z-index:10;
padding:0px;
}
#theImages {
position:absolute;
height:150px;
left:0px;
top:0px;
width:100000px;
padding:0px;
}
#theImages #slideEnd {
float:left;
}
#theImages img {
float:left;
padding:0px;
cursor:pointer;
border:0px;
}
#theImages .imageCaption {
display:none;
}

Template:Filmstrip

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File:Arrow left over.gif

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File:Arrow right.gif

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