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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<title>Castle Game Engine: CastleMaterialProperties: Class TMaterialProperty</title>
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<h2>Castle Game Engine</h2><p><a href="introduction.html" class="navigation">Introduction</a></p><p><a href="AllUnits.html" class="navigation">Units</a></p><p><a href="ClassHierarchy.html" class="navigation">Class Hierarchy</a></p><p><a href="AllClasses.html" class="navigation">Classes, Interfaces, Objects and Records</a></p><p><a href="AllTypes.html" class="navigation">Types</a></p><p><a href="AllVariables.html" class="navigation">Variables</a></p><p><a href="AllConstants.html" class="navigation">Constants</a></p><p><a href="AllFunctions.html" class="navigation">Functions and Procedures</a></p><p><a href="AllIdentifiers.html" class="navigation">Identifiers</a></p></td><td class="content">
<a name="TMaterialProperty"></a><h1 class="cio">Class TMaterialProperty</h1>
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<td><a class="section" href="#PasDoc-Description">Description</a></td><td><a class="section" href="#PasDoc-Hierarchy">Hierarchy</a></td><td>Fields</td><td>Methods</td><td><a class="section" href="#PasDoc-Properties">Properties</a></td></tr></table>
<a name="PasDoc-Description"></a><h2 class="unit">Unit</h2>
<p class="unitlink">
<a href="CastleMaterialProperties.html">CastleMaterialProperties</a></p>
<h2 class="declaration">Declaration</h2>
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<code>type TMaterialProperty = class(TObject)</code></p>
<h2 class="description">Description</h2>
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Store information that is naturally associated with a given material or texture in an external file. Right now this allows to define things like footsteps, <a class="normal" href="CastleMaterialProperties.TMaterialProperty.html#Toxic">toxic</a> ground (hurts player), and bump mapping.
<p>In the future, it should be possible to express all these properties in pure VRML/X3D (inside Appearance / Material / ImageTexture nodes). Right now, you can do this with bump mapping, see <a href="http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_bump_mapping">http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_bump_mapping</a> , but not footsteps or <a class="normal" href="CastleMaterialProperties.TMaterialProperty.html#Toxic">toxic</a> ground. In the future it should also be possible to express these properties in 3D authoring software (like Blender), and easily export them to appropriate VRML/X3D nodes. For now, this <code>TMaterialProperty</code> allows us to easily customize materials in a way that is not possible in Blender.
<p>Using an external file for material properties has also long-term advantages: it can be shared across many 3D models, for example you can define footsteps sound for all grounds using the <code>grass.png</code> textures, in all levels, at once.
<p>You have to load an XML file by setting <a class="normal" href="CastleMaterialProperties.TMaterialProperties.html#URL">MaterialProperties.URL</a> property.</p>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TObject</li>
<li class="thisitem">TMaterialProperty</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#TextureBaseName">TextureBaseName</a></b>: string read FTextureBaseName write FTextureBaseName;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#FootstepsSound">FootstepsSound</a></b>: <a href="CastleSoundEngine.html#TSoundType">TSoundType</a> read FFootstepsSound write FFootstepsSound;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#Toxic">Toxic</a></b>: boolean read FToxic write FToxic;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#ToxicDamageConst">ToxicDamageConst</a></b>: Single read FToxicDamageConst write FToxicDamageConst;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#ToxicDamageRandom">ToxicDamageRandom</a></b>: Single read FToxicDamageRandom write FToxicDamageRandom;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#ToxicDamageTime">ToxicDamageTime</a></b>: Single read FToxicDamageTime write FToxicDamageTime;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#NormalMap">NormalMap</a></b>: string read FNormalMap write FNormalMap;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleMaterialProperties.TMaterialProperty.html#AlphaChannel">AlphaChannel</a></b>: string read FAlphaChannel write FAlphaChannel;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="TextureBaseName"></a><code>property <b>TextureBaseName</b>: string read FTextureBaseName write FTextureBaseName;</code></td>
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<p>
Texture basename to associate this property will all appearances using given texture. For now, this is the only way to associate property, but more are possible in the future (like MaterialNodeName).</p>
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<td class="itemcode"><a name="FootstepsSound"></a><code>property <b>FootstepsSound</b>: <a href="CastleSoundEngine.html#TSoundType">TSoundType</a> read FFootstepsSound write FFootstepsSound;</code></td>
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<p>
Footsteps sound to make when player is walking on this material. <a class="normal" href="CastleSoundEngine.html#stNone">stNone</a> is no information is available.</p>
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<td class="itemcode"><a name="Toxic"></a><code>property <b>Toxic</b>: boolean read FToxic write FToxic;</code></td>
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Is the floor <code>toxic</code> when walking on it. </p>
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<td class="itemcode"><a name="ToxicDamageConst"></a><code>property <b>ToxicDamageConst</b>: Single read FToxicDamageConst write FToxicDamageConst;</code></td>
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<td class="itemcode"><a name="ToxicDamageRandom"></a><code>property <b>ToxicDamageRandom</b>: Single read FToxicDamageRandom write FToxicDamageRandom;</code></td>
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<td class="itemcode"><a name="ToxicDamageTime"></a><code>property <b>ToxicDamageTime</b>: Single read FToxicDamageTime write FToxicDamageTime;</code></td>
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<td class="itemcode"><a name="NormalMap"></a><code>property <b>NormalMap</b>: string read FNormalMap write FNormalMap;</code></td>
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<p>
Normal map texture URL. This is a simple method to activate bump mapping, equivalent to using <code>normalMap</code> field in an Appearance node of VRML/X3D, see <a href="http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_bump_mapping">http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_bump_mapping</a> .
<p>In case both VRML/X3D Appearance specifies <code>normalMap</code> and we have <code>NormalMap</code> defined here, the VRML/X3D Appearance is used.</p>
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<td class="itemcode"><a name="AlphaChannel"></a><code>property <b>AlphaChannel</b>: string read FAlphaChannel write FAlphaChannel;</code></td>
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<p>
Override alpha channel type for diffuse texture. The meaning and allowed values for this are the same as for <code>alphaChannel</code> field for texture nodes, see <a href="http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_alpha_channel_detection">http://castle-engine.sourceforge.net/x3d_extensions.php#section_ext_alpha_channel_detection</a> . Empty value (default) doesn't change the alpha channel type (set in VRML/X3D or auto-detected).</p>
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