topical media & game development
game-xna-intro-XnaGraphicEngineContentProcessors-XnaGraphicEngineModelProcessor.cs / cs
#region Using directives
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Storage;
using Microsoft.Xna.Framework.Content.Pipeline;
using Microsoft.Xna.Framework.Content.Pipeline.Processors;
using Microsoft.Xna.Framework.Content.Pipeline.Graphics;
using Microsoft.Xna.Framework.Content.Pipeline.Serialization.Compiler;
using XnaGraphicEngineContentProcessors.Helpers;
#endregion
namespace XnaGraphicEngineContentProcessorsContentProcessors
{
<summary>
XnaGraphicEngine model processor for x files. Loads models the same way as
the ModelProcessor class, but generates tangents and some additional
data too.
</summary>
[ContentProcessor(DisplayName = "XnaGraphicEngine Model (Tangent support)")]
public class XnaGraphicEngineModelProcessor : ModelProcessor
{
#region Process
<summary>
Process the model
</summary>
<param name="input">Input data
</param>
<param name="context">Context for logging
</param>
<returns>Model content
</returns>
public override ModelContent Process(
NodeContent input, ContentProcessorContext context)
{
// First generate tangent data because x files don't store them
GenerateTangents(input, context);
// Use the name of the bone for our mesh name if it is not set
UseParentBoneNameIfMeshNameIsNotSet(input);
// Store the current selected technique and if the texture uses alpha
// into the mesh name for each mesh part.
StoreEffectTechniqueInMeshName(input, context);
// And let the rest be processed by the default model processor
return base.Process(input, context);
} // Process
#endregion
#region Generate tangents
<summary>
Generate tangents helper method, x files do not have tangents
exported, we have to generate them ourselfs.
</summary>
<param name="input">Input data
</param>
<param name="context">Context for logging
</param>
private void GenerateTangents(
NodeContent input, ContentProcessorContext context)
{
MeshContent mesh = input as MeshContent;
if (mesh != null)
{
// Generate trangents for the mesh. We don't want binormals,
// so null is passed in for the last parameter.
MeshHelper.CalculateTangentFrames(mesh,
VertexChannelNames.
TextureCoordinate(0),
VertexChannelNames.Tangent(0), null);
} // if
// Go through all childs
foreach (NodeContent child in input.Children)
{
GenerateTangents(child, context);
} // foreach
} // GenerateTangents(input, context)
#endregion
#region UseParentBoneNameIfMeshNameIsNotSet
<summary>
Use parent bone's name if mesh's name is not set.
</summary>
<param name="input">
</param>
private void UseParentBoneNameIfMeshNameIsNotSet(NodeContent input)
{
if (String.IsNullOrEmpty(input.Name) &&
input.Parent != null &&
String.IsNullOrEmpty(input.Parent.Name) == false)
input.Name = input.Parent.Name;
foreach (NodeContent node in input.Children)
UseParentBoneNameIfMeshNameIsNotSet(node);
} // UseParentBoneNameIfMeshNameIsNotSet(input)
#endregion
#region StoreEffectMaterialsAndTechniques
<summary>
Stores the current selected technique and if the texture uses alpha
into the mesh name for each mesh part.
</summary>
private void StoreEffectTechniqueInMeshName(
NodeContent input, ContentProcessorContext context)
{
MeshContent mesh = input as MeshContent;
if (mesh != null)
{
foreach (GeometryContent geom in mesh.Geometry)
{
EffectMaterialContent effectMaterial = geom.
Material as EffectMaterialContent;
if (effectMaterial != null)
{
if (effectMaterial.OpaqueData.ContainsKey("technique"))
{
// Store technique here! (OpaqueData["technique"] is an int32)
input.Name = input.Name + effectMaterial.OpaqueData["technique"];
} // if
} // if
} // foreach
} // if
// Go through all childs
foreach (NodeContent child in input.Children)
{
StoreEffectTechniqueInMeshName(child, context);
} // foreach
} // StoreEffectTechniqueInMeshName()
#endregion
} // class XnaGraphicEngineContentProcessorsModelProcessor
} // namespace XnaGraphicEngineContentProcessorsContentProcessors
(C) Æliens
20/2/2008
You may not copy or print any of this material without explicit permission of the author or the publisher.
In case of other copyright issues, contact the author.
