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  1. POWPF 3D Gradientbrush problem
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    <p>The main problem is in LinearGradientBrush. It fills triangle in solid red. What's wrong? I have tried almost the same code with 2d shapes. It worked perfectly.</p> <pre><code>&lt;Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="215" Width="336"&gt; &lt;Grid Height="146" Width="232"&gt; &lt;Viewport3D Name="myViewPort" ClipToBounds="False"&gt; &lt;Viewport3D.Camera&gt; &lt;PerspectiveCamera x:Name="myCamera" Position="10,10,10" UpDirection="0,1,0" LookDirection="-10,-10,-10" FieldOfView="10"/&gt; &lt;/Viewport3D.Camera&gt; &lt;ModelVisual3D&gt; &lt;ModelVisual3D.Content&gt; &lt;GeometryModel3D&gt; &lt;GeometryModel3D.Geometry&gt; &lt;MeshGeometry3D Positions="-1,0,0 0,1,0 1,0,0" TriangleIndices="0,2,1" /&gt; &lt;/GeometryModel3D.Geometry&gt; &lt;GeometryModel3D.Material&gt; &lt;DiffuseMaterial&gt; &lt;DiffuseMaterial.Brush&gt; &lt;LinearGradientBrush StartPoint="0,0" EndPoint="1,1"&gt; &lt;GradientStop Color="Black" Offset="0"&gt;&lt;/GradientStop&gt; &lt;GradientStop Color="Red" Offset="0.6"&gt;&lt;/GradientStop&gt; &lt;/LinearGradientBrush&gt; &lt;/DiffuseMaterial.Brush&gt; &lt;/DiffuseMaterial&gt; &lt;/GeometryModel3D.Material&gt; &lt;/GeometryModel3D&gt; &lt;/ModelVisual3D.Content&gt; &lt;/ModelVisual3D&gt; &lt;ModelVisual3D&gt; &lt;ModelVisual3D.Content&gt; &lt;AmbientLight&gt;&lt;/AmbientLight&gt; &lt;/ModelVisual3D.Content&gt; &lt;/ModelVisual3D&gt; &lt;/Viewport3D&gt; &lt;/Grid&gt; </code></pre> <p></p>
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