Kav/Effects/SkyboxEffect.cs

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C#
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2020-10-17 20:53:26 +00:00
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
namespace Kav
{
public class SkyboxEffect : Effect
{
EffectParameter viewProjectionParam;
EffectParameter skyboxParam;
Matrix view;
Matrix projection;
TextureCube skybox;
EffectDirtyFlags dirtyFlags = EffectDirtyFlags.All;
public Matrix View
{
get { return view; }
set
{
view = value;
dirtyFlags |= EffectDirtyFlags.WorldViewProj;
}
}
public Matrix Projection
{
get { return projection; }
set
{
projection = value;
dirtyFlags |= EffectDirtyFlags.WorldViewProj;
}
}
public TextureCube Skybox
{
get { return skybox; }
set
{
skybox = value;
dirtyFlags |= EffectDirtyFlags.World; // hack flag but whatever
}
}
public SkyboxEffect(GraphicsDevice graphicsDevice) : base(graphicsDevice, Resources.SkyboxEffect)
{
CacheEffectParameters();
}
protected override void OnApply()
{
if ((dirtyFlags & EffectDirtyFlags.WorldViewProj) != 0)
{
Matrix.Multiply(ref view, ref projection, out Matrix viewProjection);
viewProjectionParam.SetValue(viewProjection);
dirtyFlags &= ~EffectDirtyFlags.WorldViewProj;
}
if ((dirtyFlags & EffectDirtyFlags.World) != 0)
{
skyboxParam.SetValue(skybox);
dirtyFlags &= ~EffectDirtyFlags.World;
}
}
private void CacheEffectParameters()
{
viewProjectionParam = Parameters["ViewProjection"];
skyboxParam = Parameters["skybox"];
}
}
}