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[minor] Simulate color vision deficiencies at any severity in Semantics.Color - #415
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…cs.Color Adds ColorVisionDeficiency (Protan, Deutan, Tritan), ColorVision.Matrix with the Machado, Oliveira and Fernandes (2009) tables at severities 0.0 to 1.0 in 0.1 steps, interpolated linearly between them, ColorVisionMatrix with Apply, and Color.Simulate, which applies the matrix to the linear channels with clamping. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011NhxrNWomwz1U7X5GMMT1J
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Requested by Matt · project thread
Before: Semantics.Color had no way to show how a color looks to someone with a color vision deficiency, so ImageGui keeps its own copy of the Machado severity 1.0 matrices and can't simulate anything milder.
After:
color.Simulate(ColorVisionDeficiency.Deutan, 0.4)returns the color as a viewer with that deficiency at that severity sees it, andColorVision.Matrix(deficiency, severity)returns the matrix for applying to many pixels.How:
ColorVisionholds the published Machado, Oliveira and Fernandes (2009) tables for protan, deutan and tritan at severities 0.0 to 1.0 in 0.1 steps (taken from the authors' supplementary data, six decimals as published), and interpolates linearly between the two nearest steps, snapping to a step when the division lands within rounding of one.ColorVisionMatrixis a 3x3 linear-RGB matrix whoseApplyclamps each channel to 0..1 and keeps alpha. A severity outside 0..1 or NaN, or an undefined deficiency, throwsArgumentOutOfRangeException. Tests cover severity 0 as identity, severity 1.0 against the published matrices to 1e-6, 0.55 as the midpoint of 0.5 and 0.6, every row summing to 1 within 1e-3, clamping, and the throws. README and CLAUDE.md describe it.Checked locally: the full test suite passes (1618 passed, 8 skipped), and the Sonar analyzers report nothing in the new files.
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https://claude.ai/code/session_011NhxrNWomwz1U7X5GMMT1J
Generated by Claude Code