Kav/Effects/LinearDepthEffect.cs

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2.5 KiB
C#
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2020-10-19 10:01:37 +00:00
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
namespace Kav
{
public class LinearDepthEffect : Effect
{
EffectParameter modelParam;
EffectParameter modelViewProjectionParam;
EffectParameter lightPositionParam;
EffectParameter farPlaneParam;
EffectDirtyFlags dirtyFlags = EffectDirtyFlags.All;
Matrix model;
Matrix view;
Matrix projection;
public Vector3 LightPosition { get; set; }
public float FarPlane { get; set; }
public Matrix Model
{
get { return model; }
set
{
model = value;
dirtyFlags |= EffectDirtyFlags.World;
dirtyFlags |= EffectDirtyFlags.WorldViewProj;
}
}
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 LinearDepthEffect(GraphicsDevice graphicsDevice) : base(graphicsDevice, Resources.LinearDepthEffect)
{
CacheEffectParameters();
}
protected override void OnApply()
{
if ((dirtyFlags & EffectDirtyFlags.WorldViewProj) != 0)
{
Matrix.Multiply(ref view, ref projection, out Matrix viewProjection);
Matrix.Multiply(ref model, ref viewProjection, out Matrix worldViewProj);
modelViewProjectionParam.SetValue(worldViewProj);
dirtyFlags &= ~EffectDirtyFlags.WorldViewProj;
}
if ((dirtyFlags & EffectDirtyFlags.World) != 0)
{
modelParam.SetValue(model);
dirtyFlags &= ~EffectDirtyFlags.World;
}
lightPositionParam.SetValue(LightPosition);
farPlaneParam.SetValue(FarPlane);
}
private void CacheEffectParameters()
{
modelParam = Parameters["Model"];
modelViewProjectionParam = Parameters["ModelViewProjection"];
lightPositionParam = Parameters["LightPosition"];
farPlaneParam = Parameters["FarPlane"];
}
}
}