HPL1/Content Creation Chapter 4 - Revision history

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4.4 Physics material

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4.1 Types

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== 4. Creating Materials ==

=== 4.1 Types ===
Instead of creating materials for your self, like one usually does in 3d modeling programs, a couple of predefined materials are used. What needs to be filled out are the different maps used.

'''Settings for General''' Use Alpha: TODO Depth Test: Value: 
==== 4.1.1 Flat ====
This material shows the diffuse map without any lighting. '''Texture units:''' Diffuse
 
==== 4.1.2 Additive ====
This transparent material is blended additively with the background. 

''Result = source_pixel + screen_pixel'' 

It is not affected by lighting. '''Texture units:''' Diffuse
 

==== 4.1.3 Modulative ====
This transparent material is multiplied with the background. 
''Result = source_pixel * screen_pixel'' 
It is not affected by lighting. '''Texture units:''' Diffuse
 
==== 4.1.4 Modulative x 2 ====
This transparent material is multiplied with the background times two, like this: 
''Result = (source_pixel * screen_pixel) * 2'' 

It is not affected by lighting. '''Texture units:''' Diffuse
 
==== 4.1.5 Alpha ====
Each texel on the texture is transperant according to the alpha channel on the texture. 
It is not affected by lighting. '''Texture units:''' Diffuse
 
==== 4.1.6 Diffuse ====
The diffuse map with lighting. '''Texture units:''' Diffuse and Illumination (optional).
 
==== 4.1.7 DiffuseSpecular ====
The diffuse map with lighting and specular term. Does not have any support for specular map. '''Texture units:''' Diffuse and Illumination (optional).
 
==== 4.1.8 Bump ====
This material shows the diffuse map with a bump mapped surface. '''Texture units:''' Diffuse, Normal-Map and Illumination (optional).
 
==== 4.1.9 BumpSpecular ====
This material shows the diffuse map with a bump mapped surface and specular term. The alpha channel of the normal map is used as specular map. '''Texture units:''' Diffuse, Normal-Map and Illumination (optional).
 
==== 4.1.10 BumpColorSpecular ====
This material shows the diffuse map with a bump mapped surface and a color specular term. '''Texture units:''' Diffuse, Normal-Map, Specular and Illumination (optional).
 

==== 4.1.11 EnvironmentMapReflect ====
This material shows the diffuse map with a environment reflection from a CubeMap. '''Texture units:''' Diffuse and CubeMap.
 

==== 4.1.12 Water ====
This transparent material is blended additively with the background. It also has a bobbing surface.

Result = source_pixel + screen_pixel

It is not affected by lighting '''Texture units:''' Diffuse.
 

=== 4.2 Texture units ===
The different material types uses texture units to calculate the value of pixel. Each texture units have the following properties:

{| class="wikitable sortable" border=1
| '''Type:''' || The type of texture, 1D, 2D and Cube can be used. Normally only 2D is used.
|-
| '''Mipmaps:''' || If mipmaps should be created for the texture and should be used for most textures.
|-
| '''Compress:''' || If hardware compression should be used if available. (Not supported yet).
|-
| '''Wrap:''' || The wrap mode to use when drawing the texture, “Repeat” means texture is tiled. “Clamp” means that uv-values above 1 and below 0 are clamped. Useful on for example flat objects with transparent edges. “ClampToEdge” is the same as “Clamp” but does not blend with the opposite edge.
|-
| '''Anim mode:''' || How to play an animation, looping or bouncing back and forth with oscillation.
|-
| '''Frame time:''' || How long an image should be displayed in an image sequence, 1 = 1 image / second, 2 = 1 image / 2 seconds, 0.2 = 5 images / second etc.
|-
|}
 
==== 4.2.1 Diffuse ====
The r,g and b channels contain the color values. The alpha channel is used for transparent materials.
 
==== 4.2.2 Normal-Map ====
This is a map showing the topology of a surface in tangent space. The r,g and b channels contain the compressed normal vectors. The alpha channel is used for specifying the specular term for specular material, 0= no specularity 1 = full specularity.
 
==== 4.2.3 Illumination ====
This map is additively added after all lights has been rendered.
 
==== 4.2.4 Specular ====
The r,g and b channels are used to create a specular effect. The whiter the shinier, black = no shine.
 

==== 4.2.5 CubeMap ====
''Cube map texturing is a form of texture mapping that uses a 3D direction vector (a fancy phrase that means nothing more than a direction) to index into a texture that is six square 2D textures arranged like the faces of a cube. See [http://developer.nvidia.com/object/cube_map_ogl_tutorial.html this cube map tutorial] for extensive information on it's construction.''

The CubeMap is used to create a "reflection" of the environment in a texture, for example the ice in the ice cave level in penumbra.

For the HPL engine you make the 6 images as separate images, and you name them: nameofimage_neg_x nameofimage_neg_y nameofimage_neg_z nameofimage_pos_x nameofimage_pos_y nameofimage_pos_z 
In the material editor under Texture Units at the file prompt: you add one of the images and only use the "nameofimage" excluding "_neg_x", the engine will then automatically locate and use the 6 images.
 
=== 4.3 File format ===
Material files has the extension “.mat”, are made in XML and has the following format:

<syntaxhighlight lang="xml">
<Material>
<Main Type="[material type]"/>
<TextureUnits>
<[Texture unit] File="[file name]" Type ="[type]" Mipmaps="[true or false]" Compress="[true or false]" Wrap="[wrap mode]"/>
[additional texture units…]
</TextureUnits>
</Material>
</syntaxhighlight>

Instead of handwriting these files HplHelper can be used to create material files.
 

=== 4.4 Physics material ===
This is gives the material physical properties as well. Read more about the different types under [[hpl1:documentation:content.creation.document.chap5#Physics Materials|chapter 5.6]]. Note that this property is only useful for static scene geometry and is NOT used for entities, entities specify their physics material in the entity file.
 \\

@@ Line 116: / Line 116: @@
 ===4.4 Physics material===
-This is gives the material physical properties as well. Read more about the different types under [[HPL1/Content Creation Chapter 5|chapter 5.6]]. Note that this property is only useful for static scene geometry and is NOT used for entities, entities specify their physics material in the entity file.
+This is gives the material physical properties as well. Read more about the different types under [[HPL1/Content_Creation_Chapter_5#5.6_Physics_Materials|chapter 5.6]]. Note that this property is only useful for static scene geometry and is NOT used for entities, entities specify their physics material in the entity file.
 <br /><br />\\

@@ Line 5: / Line 5: @@
 Instead of creating materials for your self, like one usually does in 3d modeling programs, a couple of predefined materials are used. What needs to be filled out are the different maps used.
-'''Settings for General'''<br />Use Alpha: TODO<br />Depth Test:<br />Value:<br /><br />
+'''Settings for General'''<br />Use Alpha: Never implemented.<br />Depth Test: Never Implemented.<br />Value: Does nothing.<br /><br />
 ====4.1.1 Flat====
 This material shows the diffuse map without any lighting.<br />'''Texture units:''' Diffuse

@@ Line 1: / Line 1: @@
-== 4. Creating Materials ==
+==4. Creating Materials==
-=== 4.1 Types ===
+===4.1 Types===
 Instead of creating materials for your self, like one usually does in 3d modeling programs, a couple of predefined materials are used. What needs to be filled out are the different maps used.
 '''Settings for General'''<br />Use Alpha: TODO<br />Depth Test:<br />Value:<br /><br />
-==== 4.1.1 Flat ====
+====4.1.1 Flat====
 This material shows the diffuse map without any lighting.<br />'''Texture units:''' Diffuse
 <br />
-==== 4.1.2 Additive ====
+====4.1.2 Additive====
 This transparent material is blended additively with the background.<br />
@@ Line 17: / Line 17: @@
 <br />
-==== 4.1.3 Modulative ====
+====4.1.3 Modulative====
 This transparent material is multiplied with the background.<br />
 ''Result = source_pixel *  screen_pixel''<br />
 It is not affected by lighting.<br />'''Texture units:''' Diffuse
 <br />
-==== 4.1.4 Modulative x 2 ====
+====4.1.4 Modulative x 2====
 This transparent material is multiplied with the background times two, like this:<br />
 ''Result = (source_pixel * screen_pixel) * 2''<br />
@@ Line 28: / Line 28: @@
 It is not affected by lighting.<br />'''Texture units:''' Diffuse
 <br />
-==== 4.1.5 Alpha ====
+====4.1.5 Alpha====
 Each texel on the texture is transperant according to the alpha channel on the texture.<br />
 It is not affected by lighting.<br />'''Texture units:''' Diffuse
 <br />
-==== 4.1.6 Diffuse ====
+====4.1.6 Diffuse====
 The diffuse map with lighting.<br />'''Texture units:''' Diffuse and Illumination (optional).
 <br />
-==== 4.1.7 DiffuseSpecular ====
+====4.1.7 DiffuseSpecular====
 The diffuse map with lighting and specular term. Does not have any support for specular map.<br />'''Texture units:''' Diffuse and Illumination (optional).
 <br />
-==== 4.1.8 Bump ====
+====4.1.8 Bump====
 This material shows the diffuse map with a bump mapped surface.<br />'''Texture units:''' Diffuse, Normal-Map and Illumination (optional).
 <br />
-==== 4.1.9 BumpSpecular ====
+====4.1.9 BumpSpecular====
 This material shows the diffuse map with a bump mapped surface and specular term. The alpha channel of the normal map is used as specular map.<br />'''Texture units:''' Diffuse, Normal-Map and Illumination (optional).
 <br />
-==== 4.1.10 BumpColorSpecular ====
+====4.1.10 BumpColorSpecular====
 This material shows the diffuse map with a bump mapped surface and a color specular term.<br />'''Texture units:''' Diffuse, Normal-Map, Specular and Illumination (optional).
 <br />
-==== 4.1.11 EnvironmentMapReflect ====
+====4.1.11 EnvironmentMapReflect====
 This material shows the diffuse map with a environment reflection from a CubeMap.<br />'''Texture units:''' Diffuse and CubeMap.
 <br />
-==== 4.1.12 Water ====
+====4.1.12 Water====
 This transparent material is blended additively with the background. It also has a bobbing surface.
@@ Line 60: / Line 60: @@
 <br /><br />
-=== 4.2 Texture units ===
+===4.2 Texture units===
 The different material types uses texture units to calculate the value of pixel. Each texture units have the following properties:
-{| class="wikitable sortable" border=1
+{| class="wikitable sortable" border="1"
-| '''Type:'''      || The type of texture, 1D, 2D and Cube can be used. Normally only 2D is used.
+|'''Type:'''||The type of texture, 1D, 2D and Cube can be used. Normally only 2D is used.
 |-
-| '''Mipmaps:'''   || If mipmaps should be created for the texture and should be used for most textures.
+|'''Mipmaps:'''||If mipmaps should be created for the texture and should be used for most textures.
 |-
-| '''Compress:'''  || If hardware compression should be used if available. (Not supported yet).
+|'''Compress:'''||If hardware compression should be used if available. (Not supported yet).
 |-
-| '''Wrap:'''      || The wrap mode to use when drawing the texture, “Repeat” means texture is tiled. “Clamp” means that uv-values above 1 and below 0 are clamped. Useful on for example flat objects with transparent edges. “ClampToEdge” is the same as “Clamp” but does not blend with the opposite edge.
+|'''Wrap:'''||The wrap mode to use when drawing the texture, “Repeat” means texture is tiled. “Clamp” means that uv-values above 1 and below 0 are clamped. Useful on for example flat objects with transparent edges. “ClampToEdge” is the same as “Clamp” but does not blend with the opposite edge.
 |-
-| '''Anim mode:'''      || How to play an animation, looping or bouncing back and forth with oscillation.
+|'''Anim mode:'''||How to play an animation, looping or bouncing back and forth with oscillation.
 |-
-| '''Frame time:'''     || How long an image should be displayed in an image sequence, 1 = 1 image / second, 2 = 1 image / 2 seconds, 0.2 = 5 images / second etc.
+|'''Frame time:'''||How long an image should be displayed in an image sequence, 1 = 1 image / second, 2 = 1 image / 2 seconds, 0.2 = 5 images / second etc.
 |-
 |}
 <br />
-==== 4.2.1 Diffuse ====
+====4.2.1 Diffuse====
 The r,g and b channels contain the color values. The alpha channel is used for transparent materials.
 <br />
-==== 4.2.2 Normal-Map ====
+====4.2.2 Normal-Map====
 This is a map showing the topology of a surface in tangent space. The r,g and b channels contain the compressed normal vectors. The alpha channel is used for specifying the specular term for specular material, 0= no specularity 1 = full specularity.
 <br />
-==== 4.2.3 Illumination ====
+====4.2.3 Illumination====
 This map is additively added after all lights has been rendered.
 <br />
-==== 4.2.4 Specular ====
+====4.2.4 Specular====
 The r,g and b channels are used to create a specular effect. The whiter the shinier, black = no shine.
 <br />
-==== 4.2.5 CubeMap ====
+====4.2.5 CubeMap====
 ''Cube map texturing is a form of texture mapping that uses a 3D direction vector (a fancy phrase that means nothing more than a direction) to index into a texture that is six square 2D textures arranged like the faces of a cube. See [http://developer.nvidia.com/object/cube_map_ogl_tutorial.html this cube map tutorial] for extensive information on it's construction.''
@@ Line 99: / Line 99: @@
 In the material editor under Texture Units at the file prompt: you add one of the images and only use the "nameofimage" excluding "_neg_x", the engine will then automatically locate and use the 6 images.
 <br /><br />
-=== 4.3 File format ===
+===4.3 File format===
 Material files has the extension “.mat”, are made in XML and has the following format:
@@ Line 115: / Line 115: @@
 <br /><br />
-=== 4.4 Physics material ===
+===4.4 Physics material===
-This is gives the material physical properties as well. Read more about the different types under [[hpl1:documentation:content.creation.document.chap5#Physics Materials|chapter 5.6]]. Note that this property is only useful for static scene geometry and is NOT used for entities, entities specify their physics material in the entity file.
+This is gives the material physical properties as well. Read more about the different types under [[HPL1/Content Creation Chapter 5|chapter 5.6]]. Note that this property is only useful for static scene geometry and is NOT used for entities, entities specify their physics material in the entity file.
 <br /><br />\\

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