Revision control
Copy as Markdown
// Copyright (C) 2026 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
// Tests that DynamicRigidBody::ccd actually prevents tunneling for a fast
// body that would otherwise pass straight through a thin static wall
// undetected in a single simulation step.
//
// 00) no CCD: fast body tunnels through, no contact
// 01) SweepBasedCCD: fast body is caught, contact fires
// 02) SpeculativeCCD: fast body is caught, contact fires
// 03) PhysicsWorld::enableCCD (deprecated global fallback): fast body is caught, contact fires
import QtCore
import QtQuick
import QtTest
import QtQuick3D
import QtQuick3D.Physics
import QtQuick3D.Physics.TestUtils
Item {
property real sceneWidth: 300
property real sceneHeight: 300
width: sceneWidth*4
height: sceneHeight
visible: true
//////////////////////////////////////////////////
// 00 no CCD: fast body tunnels through, no contact
TunnelScene {
width: parent.sceneWidth
height: parent.sceneHeight
id: sceneNoCcd
ccd: DynamicRigidBody.None
}
PhysicsTestCase {
// Require the sphere to actually be found well past the wall (not
// just "no contact happened"), so the test can't pass vacuously if
// contact reporting itself were broken or the sphere never moved.
name: "no CCD: fast body tunnels through thin wall (no contact)"
goalReached: sceneNoCcd.bulletPosition.y < -2000 && !sceneNoCcd.contact
}
//////////////////////////////////////////////////
// 01 SweepBasedCCD: fast body is caught, contact fires
TunnelScene {
width: parent.sceneWidth
height: parent.sceneHeight
x: parent.sceneWidth
id: sceneCcd
ccd: DynamicRigidBody.SweepBasedCCD
}
PhysicsTestCase {
// Also confirm the sphere was actually stopped at the wall rather
// than merely reporting a contact while still sailing through it.
name: "SweepBasedCCD: fast body is caught by thin wall (contact)"
goalReached: sceneCcd.contact && sceneCcd.bulletPosition.y > -150
}
//////////////////////////////////////////////////
// 02 SpeculativeCCD: fast body is caught, contact fires
TunnelScene {
width: parent.sceneWidth
height: parent.sceneHeight
x: parent.sceneWidth*2
id: sceneSpeculativeCcd
ccd: DynamicRigidBody.SpeculativeCCD
}
PhysicsTestCase {
name: "SpeculativeCCD: fast body is caught by thin wall (contact)"
goalReached: sceneSpeculativeCcd.contact && sceneSpeculativeCcd.bulletPosition.y > -150
}
//////////////////////////////////////////////////
// 03 PhysicsWorld::enableCCD (deprecated global fallback): fast body is
// caught, contact fires
TunnelScene {
width: parent.sceneWidth
height: parent.sceneHeight
x: parent.sceneWidth*3
id: sceneEnableCcd
// ccd left at its default None: relies purely on the deprecated
// PhysicsWorld.enableCCD global fallback (uses SweepBasedCCD for a
// non-kinematic body).
enableCCD: true
}
PhysicsTestCase {
name: "PhysicsWorld.enableCCD: fast body is caught by thin wall (contact)"
goalReached: sceneEnableCcd.contact && sceneEnableCcd.bulletPosition.y > -150
}
}