Filter for Ray and Ray Trajectories
You can right-click a Ray Trajectories plot node to add a Filter subnode (), which controls the particle types to include and whether to render all particles or a subset of the particles. The Filter node has the following section:
Ray Selection
From the Rays to include list, select the rays types or subset to include in the ray trajectories plot:
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All (the default) to include all rays.
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Primary to include primary rays only.
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Secondary to include secondary rays only. This includes the reflected rays released at material discontinuities.
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Logical expression to include a subset of rays that fulfills the logical expression that you enter in the Logical expression for inclusion field. For example, gop.I>1[W/m^2] only includes rays with an intensity greater than 1 W/m2, and x>0 only includes rays in areas where the x coordinate is positive. Click the Replace Expression () button to select predefined expressions for the logical expression.
From the Rays to render list, select an option for controlling how many rays to render:
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All (the default) to render all rays in the ray tracing simulation.
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Fraction to only render a fraction of the rays. You specify the fraction as a number between 0 and 1 in the Fraction of rays field. The default fraction is 1; that is, to render all rays.
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Number to only render a certain number of rays, which you specify in the Number of rays field. The default is to render 100 rays.