vasilito
f31522130f
Build system (5 gaps hardened): - COOKBOOK_OFFLINE defaults to true (fork-mode) - normalize_patch handles diff -ruN format - New 'repo validate-patches' command (25/25 relibc patches) - 14 patched Qt/Wayland/display recipes added to protected list - relibc archive regenerated with current patch chain Boot fixes (fixable): - Full ISO EFI partition: 16 MiB → 1 MiB (matches mini, BIOS hardcoded 2 MiB offset) - D-Bus system bus: absolute /usr/bin/dbus-daemon path (was skipped) - redbear-sessiond: absolute /usr/bin/redbear-sessiond path (was skipped) - daemon framework: silenced spurious INIT_NOTIFY warnings for oneshot_async services (P0-daemon-silence-init-notify.patch) - udev-shim: demoted INIT_NOTIFY warning to INFO (expected for oneshot_async) - relibc: comprehensive named semaphores (sem_open/close/unlink) replacing upstream todo!() stubs - greeterd: Wayland socket timeout 15s → 30s (compositor DRM wait) - greeter-ui: built and linked (header guard unification, sem_compat stubs removed) - mc: un-ignored in both configs, fixed glib/libiconv/pcre2 transitive deps - greeter config: removed stale keymapd dependency from display/greeter services - prefix toolchain: relibc headers synced, _RELIBC_STDLIB_H guard unified Unfixable (diagnosed, upstream): - i2c-hidd: abort on no-I2C-hardware (QEMU) — process::exit → relibc abort - kded6/greeter-ui: page fault 0x8 — Qt library null deref - Thread panics fd != -1 — Rust std library on Redox - DHCP timeout / eth0 MAC — QEMU user-mode networking - hwrngd/thermald — no hardware RNG/thermal in VM - live preload allocation — BIOS memory fragmentation, continues on demand
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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#include "qquickfriction_p.h"
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#include <qmath.h>
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QT_BEGIN_NAMESPACE
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/*!
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\qmltype Friction
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\nativetype QQuickFrictionAffector
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\inqmlmodule QtQuick.Particles
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\ingroup qtquick-particles
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\inherits ParticleAffector
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\brief For applying friction proportional to the particle's current velocity.
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*/
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/*!
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\qmlproperty real QtQuick.Particles::Friction::factor
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A drag will be applied to moving objects which is this factor of their current velocity.
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*/
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/*!
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\qmlproperty real QtQuick.Particles::Friction::threshold
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The drag will only be applied to objects with a velocity above the threshold velocity. The
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drag applied will bring objects down to the threshold velocity, but no further.
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The default threshold is 0
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*/
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static qreal sign(qreal a)
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{
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return a >= 0 ? 1 : -1;
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}
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static const qreal epsilon = 0.00001;
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QQuickFrictionAffector::QQuickFrictionAffector(QQuickItem *parent) :
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QQuickParticleAffector(parent), m_factor(0.0), m_threshold(0.0)
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{
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}
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bool QQuickFrictionAffector::affectParticle(QQuickParticleData *d, qreal dt)
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{
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if (!m_factor)
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return false;
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qreal curVX = d->curVX(m_system);
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qreal curVY = d->curVY(m_system);
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if (!curVX && !curVY)
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return false;
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qreal newVX = curVX + (curVX * m_factor * -1 * dt);
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qreal newVY = curVY + (curVY * m_factor * -1 * dt);
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if (!m_threshold) {
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if (sign(curVX) != sign(newVX))
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newVX = 0;
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if (sign(curVY) != sign(newVY))
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newVY = 0;
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} else {
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qreal curMag = qSqrt(curVX*curVX + curVY*curVY);
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if (curMag <= m_threshold + epsilon)
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return false;
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qreal newMag = qSqrt(newVX*newVX + newVY*newVY);
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if (newMag <= m_threshold + epsilon || //went past the threshold, stop there instead
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sign(curVX) != sign(newVX) || //went so far past maybe it came out the other side!
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sign(curVY) != sign(newVY)) {
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qreal theta = qAtan2(curVY, curVX);
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newVX = m_threshold * qCos(theta);
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newVY = m_threshold * qSin(theta);
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}
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}
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d->setInstantaneousVX(newVX, m_system);
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d->setInstantaneousVY(newVY, m_system);
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return true;
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}
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QT_END_NAMESPACE
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#include "moc_qquickfriction_p.cpp"
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