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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ import QtQuick
++ import QtQuick.Controls
++ import QtQuick.Layouts
++ import QtQuick3D
++
++ ScrollView {
++ id: rootView
++ required property PrincipledMaterial targetMaterial
++ ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
++ width: availableWidth
++ property bool specularGlossyMode: false
++
++ ColumnLayout {
++ width: rootView.availableWidth
++
++ MarkdownLabel {
++ text: `# Anisotropy
++ Anisotropy stretches the specular highlight along one direction of the
++ surface. Brushed metal, hair, and the grooves of a vinyl record all reflect
++ this way: the microscopic detail runs in a direction, so the reflection smears
++ across it instead of staying round.
++
++ Anisotropy is only available on PrincipledMaterial.${rootView.specularGlossyMode ? "\n\n**The scene is currently showing the SpecularGlossyMaterial, so switch back to the PrincipledMaterial in the Basics tab to see these controls take effect.**" : ""}
++
++ Unlike sheen or clearcoat this is not an extra layer of reflection. It changes
++ the shape of the existing specular highlight, so it is most visible on a
++ smooth, metallic material and barely visible on a rough dielectric one.
++
++ ## Anisotropy Strength
++ At \`0.0\`, the default, the highlight is round and the material renders exactly
++ as it would without anisotropy. Raising the value stretches the highlight
++ further, until at \`1.0\` it becomes a band across the surface.
++ `
++ }
++
++ RowLayout {
++ Label {
++ text: "Anisotropy Strength (" + rootView.targetMaterial.anisotropyStrength.toFixed(2) + ")"
++ Layout.fillWidth: true
++ }
++ Slider {
++ from: 0
++ to: 1
++ value: rootView.targetMaterial.anisotropyStrength
++ onValueChanged: rootView.targetMaterial.anisotropyStrength = value
++ }
++ }
++
++ MarkdownLabel {
++ text: `## Anisotropy Rotation
++ This turns the direction the highlight is stretched along, in degrees, within
++ the tangent plane of the surface. At \`0\` the highlight follows the tangent of
++ the mesh, which for most models means it follows the horizontal direction of
++ the texture coordinates.
++
++ Note that the direction is only as meaningful as the tangent frame it is
++ measured against. A mesh that carries tangent data, or a material with a
++ Normal Map, has a well defined tangent frame. Without either, Qt Quick 3D
++ derives a stable frame from the surface normal instead, and the highlight will
++ still stretch but in a direction that was not chosen by anyone.
++ `
++ }
++
++ RowLayout {
++ Label {
++ text: "Anisotropy Rotation (" + rootView.targetMaterial.anisotropyRotation.toFixed(1) + "°)"
++ Layout.fillWidth: true
++ }
++ Slider {
++ from: 0
++ to: 360
++ value: rootView.targetMaterial.anisotropyRotation
++ onValueChanged: rootView.targetMaterial.anisotropyRotation = value
++ }
++ }
++
++ MarkdownLabel {
++ text: `## Anisotropy Map
++ The Anisotropy Map is the one map with a fixed channel layout, so there is no
++ channel selector to go with it. The red and green channels hold the direction
++ in tangent space, remapped from \`0.0\`-\`1.0\` to \`-1.0\`-\`1.0\`, and the blue
++ channel scales the Anisotropy Strength. That lets a single texture both aim and
++ fade the effect, which is how a brushed metal texture describes its grain.
++
++ Since the blue channel scales the strength, this map does nothing while
++ Anisotropy Strength is \`0.0\`.
++ `
++ }
++
++ TextureSourceControl {
++ defaultTexture: "maps/noise.png"
++ defaultClearColor: "black"
++ onTargetTextureChanged: {
++ rootView.targetMaterial.anisotropyMap = targetTexture
++ }
++ }
++ }
++ }