Path with broken shadow effect

问题

I hope that it is clear enough in the image, I have a triangle with shadow effect that doesn't look so good, seems to be broken somehow. Any help will be greatly appreciated.

(Update: the rectangle and the path have to be separated)

XAML:

    <Grid Height="50" Width="60" >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="20" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <Rectangle Grid.Column="1" Stroke="Black" Fill="White">
            <Rectangle.Effect>
                <DropShadowEffect Opacity="0.5" ShadowDepth="4" BlurRadius="10" />
            </Rectangle.Effect>
        </Rectangle>
        <Path Fill="White" Stretch="Fill" Stroke="Black" HorizontalAlignment="Left" Margin="0,15,-1,15"
                        Data="M44.386378,164.8791 L22.983157,171.42119 44.713478,176.58567" Width="23.167">
            <Path.Effect>
                <DropShadowEffect BlurRadius="10" Opacity="0.5" ShadowDepth="4" />
            </Path.Effect>
        </Path>
    </Grid>
</Grid>

回答1:

On your triangle:

Remove the Margin
Set the Path height explicitly ("22" is pretty close what you have there).

That should prevent the triangle's shadow from being clipped.

Here's the xaml for that:

    <Grid Height="50" Width="60" >
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="20" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <Rectangle Grid.Column="1" Stroke="Black" Fill="White" >
        <Rectangle.Effect>
            <DropShadowEffect Opacity="0.5" ShadowDepth="4" BlurRadius="10" />
        </Rectangle.Effect>
    </Rectangle>
    <Path Fill="White" Stretch="Fill" Stroke="Black" HorizontalAlignment="Left" 
        Data="M44.386378,164.8791 L22.983157,171.42119 44.713478,176.58567" Width="23.167" Height="22">
        <Path.Effect>
            <DropShadowEffect BlurRadius="10" Opacity="0.5" ShadowDepth="4" />
        </Path.Effect>
    </Path>
</Grid>

回答2:

The problem is you have two separate elements each with a drop shadow. You cannot expect their shadows to join up nicely, the 'blur' is applied separately to each element. Try combining your rectangle and triangle into a single path. e.g.

<Path Fill="White" Stretch="Fill" Stroke="Black" HorizontalAlignment="Left" Margin="0,15,-1,15"
        Data="M 0,0 L 100,0 L 100,400 L 0,400 L 0,300 L -50, 200 L 0, 100 L 0,0">
    <Path.Effect>
      <DropShadowEffect BlurRadius="10" Opacity="0.5" ShadowDepth="4" />
    </Path.Effect>
</Path>

来源：https://stackoverflow.com/questions/4519243/path-with-broken-shadow-effect

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