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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ // Test for QTBUG-142937: parallax mapping (heightMap) without a normalMap on
++ // geometry that has no pre-computed tangents (SphereGeometry). The fix must
++ // ensure tangents/binormals are generated analytically for all pass types,
++ // including shadow passes (castsShadow: true).
++
++ import QtQuick
++ import QtQuick3D
++ import QtQuick3D.Helpers
++
++ Rectangle {
++ width: 400
++ height: 400
++ color: "lightgrey"
++
++ View3D {
++ anchors.fill: parent
++ renderMode: View3D.Offscreen
++
++ environment: SceneEnvironment {
++ backgroundMode: SceneEnvironment.Color
++ clearColor: "black"
++ }
++
++ DirectionalLight {
++ brightness: 1.5
++ eulerRotation.y: 45
++ eulerRotation.x: -30
++ castsShadow: true
++ }
++
++ camera: PerspectiveCamera {
++ z: 400
++ y: 80
++ eulerRotation.x: -10
++ }
++
++ Texture {
++ id: heightTex
++ source: "../shared/maps/heightmap.png"
++ generateMipmaps: true
++ mipFilter: Texture.Linear
++ }
++
++ Texture {
++ id: gridTex
++ source: "../shared/maps/GridWithDetails.png"
++ generateMipmaps: true
++ mipFilter: Texture.Linear
++ }
++
++ // Height map only + custom geometry without tangents: the QTBUG-142937 case.
++ // SphereGeometry has no pre-computed tangent/binormal attributes, so they
++ // must be derived analytically. Without the fix this renders incorrectly.
++ Model {
++ geometry: SphereGeometry { radius: 70 }
++ position: Qt.vector3d(-100, 30, 0)
++ materials: PrincipledMaterial {
++ baseColorMap: gridTex
++ heightMap: heightTex
++ heightAmount: 0.3
++ roughness: 0.8
++ metalness: 0.0
++ }
++ }
++
++ // Control: same geometry + height map but heightAmount = 0 (no parallax)
++ Model {
++ geometry: SphereGeometry { radius: 70 }
++ position: Qt.vector3d(100, 30, 0)
++ materials: PrincipledMaterial {
++ baseColorMap: gridTex
++ heightMap: heightTex
++ heightAmount: 0.0
++ roughness: 0.8
++ metalness: 0.0
++ }
++ }
++
++ // Control: built-in #Sphere (has pre-computed tangents) with height map only
++ Model {
++ source: "#Sphere"
++ scale: Qt.vector3d(0.7, 0.7, 0.7)
++ position: Qt.vector3d(-100, -120, 0)
++ materials: PrincipledMaterial {
++ baseColorMap: gridTex
++ heightMap: heightTex
++ heightAmount: 0.3
++ roughness: 0.8
++ metalness: 0.0
++ }
++ }
++
++ // Control: no height map at all
++ Model {
++ geometry: SphereGeometry { radius: 70 }
++ position: Qt.vector3d(100, -120, 0)
++ materials: PrincipledMaterial {
++ baseColorMap: gridTex
++ roughness: 0.8
++ metalness: 0.0
++ }
++ }
++ }
++ }