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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-145056: Writing to NORMAL via TANGENT/BINORMAL in a CustomMaterial
// MAIN() must take effect when DebugSettings.Normals is active. The regression
// (introduced by the DefaultMaterial shader-generator cleanup) caused qt_customMain()
// to be skipped entirely in debug passes so the debug visualization always showed
// unperturbed vertex normals regardless of what MAIN() wrote to NORMAL.
import QtQuick
import QtQuick3D
Rectangle {
width: 400
height: 400
color: "black"
View3D {
anchors.fill: parent
renderMode: View3D.Offscreen
environment: SceneEnvironment {
backgroundMode: SceneEnvironment.Color
clearColor: "black"
debugSettings: DebugSettings {
materialOverride: DebugSettings.Normals
}
}
DirectionalLight {
brightness: 1.5
eulerRotation.x: -40
eulerRotation.y: 45
}
camera: PerspectiveCamera {
z: 350
}
// Left sphere: CustomMaterial with TBN-space normal map applied in MAIN().
// In debug Normals mode the output must show the perturbed normals, not
// the smooth vertex normals — confirming MAIN() was actually called.
Model {
source: "#Sphere"
position: Qt.vector3d(-100, 0, 0)
materials: CustomMaterial {
property TextureInput normalMap: TextureInput {
enabled: true
texture: Texture {
source: "../shared/maps/RibsNormal.png"
}
}
fragmentShader: "custommaterial_debug_normals.frag"
}
}
// Right sphere: same CustomMaterial but normalMap texture disabled —
// the NORMAL stays unperturbed, producing a smooth normal-sphere gradient.
Model {
source: "#Sphere"
position: Qt.vector3d(100, 0, 0)
materials: CustomMaterial {
property TextureInput normalMap: TextureInput {
enabled: false
texture: Texture {
source: "../shared/maps/RibsNormal.png"
}
}
fragmentShader: "custommaterial_debug_normals.frag"
}
}
}
}