/// <summary>
/// Creates a description of a parameter used in a shader.
/// </summary>
/// <param name="name">The variable name used in the shader.</param>
/// <param name="type">An identifier of the variable used in the shader.</param>
/// <param name="effect">A reference to the effect instance.</param>
/// <param name="updateMethod">A delegate method that "polls" the updated value.</param>
public SharedParameter(string name, SceneVariable type, Effect effect, dynamic variableRef, UpdateSharedParameter updateMethod)
: base(name, effect)
{
Contract.Requires(updateMethod != null);
Type = type;
effectVariable = variableRef;
update = updateMethod;
}
/// <summary>
/// Creates a "default parameter", such as World, View, Projection Matrices,
/// light direction, positionV3, ambient Color and so on.
/// </summary>
/// <param name="type">The type of the parameter to create.</param>
/// <param name="effect">A reference of the effect instance.</param>
/// <returns>An istance of EffectParameter containg all the needed information
/// to correctly set and update this value into the shader.</returns>
public static SharedParameter Create(SceneVariable type, Effect effect)
{
Contract.Requires(effect != null);
string varName = string.Empty;
dynamic eV = null;
UpdateSharedParameter update = null;
switch (type)
{
//case SceneVariable.LightWorldViewProjection:
// varName = ParamHandles.Matrices.LightWorldViewProjection;
// eV = effect.GetVariableByName(varName);
// update = delegate(EffectParameter fxParam)
// {
// Matrix mLightVP =
// BaseLight.CreateLightViewProjectionMatrix(
// (Spotlight) Game.CurrentRenderer.LightManager.GetLight(0));
// Matrix mWorld = renderer.Camera.World;
// fxParam.ownerEffect.SetValue(eH,mWorld * mLightVP);
// };
// break;
//case SceneVariable.LightPosition:
// varName = ParamHandles.Vectors.LightPosition;
// eV = effect.GetVariableByName(varName).AsVector();
// update = ((fxParam,renderer) => Vector3Update(fxParam.EffectVariable, renderer.l)
case SceneVariable.EyePosition:
varName = ParamHandles.Vectors.EyePosition;
eV = effect.GetVariableByName(varName).AsVector();
update = ((fxParam, renderer) => Vector3Update(fxParam.EffectVariable, renderer.Camera.PositionV3));
break;
case SceneVariable.FarClip:
varName = ParamHandles.Floats.FarClip;
eV = effect.GetVariableByName(varName).AsScalar();
update = ((fxParam, renderer) => FloatUpdate(fxParam.EffectVariable, renderer.Camera.FarClip));
break;
case SceneVariable.CameraProjection:
varName = ParamHandles.Matrices.Projection;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, renderer.Camera.Projection));
break;
case SceneVariable.CameraProjectionTranspose:
varName = ParamHandles.Matrices.Projection;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, Matrix.Transpose(renderer.Camera.Projection)));
break;
//case SceneVariable.TextureBias:
// varName = ParamHandles.Matrices.TextureBias;
// eV = effect.GetVariableByName(varName);
// update =
// (fxParam => fxParam.ownerEffect.SetValue(
// eH,
// BaseLight.CreateTextureBiasMatrix(256, 0.001f))
// );
// break;
case SceneVariable.CameraView:
varName = ParamHandles.Matrices.View;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, renderer.Camera.View));
break;
case SceneVariable.CameraRotation:
varName = ParamHandles.Matrices.View;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, renderer.Camera.Rotation));
break;
case SceneVariable.CameraViewTranspose:
varName = ParamHandles.Matrices.View;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, Matrix.Transpose(renderer.Camera.View)));
break;
case SceneVariable.CameraViewInverse:
varName = ParamHandles.Matrices.ViewInverse;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, Matrix.Invert(renderer.Camera.View)));
break;
case SceneVariable.CameraWorld:
varName = ParamHandles.Matrices.World;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, renderer.Camera.World));
break;
case SceneVariable.CameraWorldInverse:
varName = ParamHandles.Matrices.WorldInverse;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, Matrix.Invert(renderer.Camera.World)));
break;
case SceneVariable.CameraWorldView:
varName = ParamHandles.Matrices.WorldView;
eV = effect.GetVariableByName(varName).AsMatrix();
update = (fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable,
Matrix.Multiply(renderer.Camera.World,renderer.Camera.View));
break;
case SceneVariable.CameraWorldViewInverse:
varName = ParamHandles.Matrices.WorldViewInverse;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, Matrix.Invert(renderer.Camera.World * renderer.Camera.View)));
break;
case SceneVariable.CameraWorldViewProjection:
varName = ParamHandles.Matrices.WorldViewProjection;
eV = effect.GetVariableByName(varName).AsMatrix();
update =
(fxParam, renderer) =>
MatrixUpdate(fxParam.EffectVariable,
renderer.Camera.World * renderer.Camera.View * renderer.Camera.Projection);
break;
case SceneVariable.CameraOrthographicProjection:
varName = ParamHandles.Matrices.Projection;
eV = effect.GetVariableByName(varName).AsMatrix();
update = ((fxParam, renderer) => MatrixUpdate(fxParam.EffectVariable, renderer.Camera.OrthoProjection));
break;
}
return new SharedParameter(varName, type, effect, eV, update);
}
protected override void OnDispose()
{
update -= update;
}
