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605 lines
22 KiB
C++
605 lines
22 KiB
C++
//
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// ApplicationCompositor.cpp
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// interface/src/ui/overlays
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//
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// Created by Benjamin Arnold on 5/27/14.
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// Copyright 2014 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#include "ApplicationCompositor.h"
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#include <memory>
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#include <QPropertyAnimation>
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#include <glm/gtc/type_ptr.hpp>
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#include <display-plugins/DisplayPlugin.h>
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#include <avatar/AvatarManager.h>
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#include <gpu/GLBackend.h>
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#include <NumericalConstants.h>
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#include "CursorManager.h"
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#include "Tooltip.h"
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#include "Application.h"
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#include <controllers/InputDevice.h>
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// Used to animate the magnification windows
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static const quint64 MSECS_TO_USECS = 1000ULL;
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static const quint64 TOOLTIP_DELAY = 500 * MSECS_TO_USECS;
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static const float RETICLE_COLOR[] = { 0.0f, 198.0f / 255.0f, 244.0f / 255.0f };
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static const float reticleSize = TWO_PI / 100.0f;
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static const float CURSOR_PIXEL_SIZE = 32.0f;
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static const float MOUSE_PITCH_RANGE = 1.0f * PI;
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static const float MOUSE_YAW_RANGE = 0.5f * TWO_PI;
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static const glm::vec2 MOUSE_RANGE(MOUSE_YAW_RANGE, MOUSE_PITCH_RANGE);
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static gpu::BufferPointer _hemiVertices;
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static gpu::BufferPointer _hemiIndices;
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static int _hemiIndexCount{ 0 };
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EntityItemID ApplicationCompositor::_noItemId;
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static QString _tooltipId;
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// Return a point's cartesian coordinates on a sphere from pitch and yaw
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glm::vec3 getPoint(float yaw, float pitch) {
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return glm::vec3(glm::cos(-pitch) * (-glm::sin(yaw)),
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glm::sin(-pitch),
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glm::cos(-pitch) * (-glm::cos(yaw)));
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}
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//Checks if the given ray intersects the sphere at the origin. result will store a multiplier that should
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//be multiplied by dir and added to origin to get the location of the collision
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bool raySphereIntersect(const glm::vec3 &dir, const glm::vec3 &origin, float r, float* result)
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{
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//Source: http://wiki.cgsociety.org/index.php/Ray_Sphere_Intersection
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//Compute A, B and C coefficients
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float a = glm::dot(dir, dir);
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float b = 2 * glm::dot(dir, origin);
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float c = glm::dot(origin, origin) - (r * r);
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//Find discriminant
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float disc = b * b - 4 * a * c;
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// if discriminant is negative there are no real roots, so return
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// false as ray misses sphere
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if (disc < 0) {
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return false;
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}
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// compute q as described above
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float distSqrt = sqrtf(disc);
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float q;
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if (b < 0) {
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q = (-b - distSqrt) / 2.0f;
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} else {
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q = (-b + distSqrt) / 2.0f;
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}
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// compute t0 and t1
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float t0 = q / a;
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float t1 = c / q;
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// make sure t0 is smaller than t1
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if (t0 > t1) {
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// if t0 is bigger than t1 swap them around
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float temp = t0;
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t0 = t1;
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t1 = temp;
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}
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// if t1 is less than zero, the object is in the ray's negative direction
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// and consequently the ray misses the sphere
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if (t1 < 0) {
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return false;
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}
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// if t0 is less than zero, the intersection point is at t1
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if (t0 < 0) {
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*result = t1;
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return true;
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} else { // else the intersection point is at t0
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*result = t0;
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return true;
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}
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}
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ApplicationCompositor::ApplicationCompositor() :
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_alphaPropertyAnimation(new QPropertyAnimation(this, "alpha"))
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{
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auto geometryCache = DependencyManager::get<GeometryCache>();
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_reticleQuad = geometryCache->allocateID();
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_magnifierQuad = geometryCache->allocateID();
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_magnifierBorder = geometryCache->allocateID();
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auto entityScriptingInterface = DependencyManager::get<EntityScriptingInterface>();
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connect(entityScriptingInterface.data(), &EntityScriptingInterface::hoverEnterEntity, [=](const EntityItemID& entityItemID, const MouseEvent& event) {
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if (_hoverItemId != entityItemID) {
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_hoverItemId = entityItemID;
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_hoverItemEnterUsecs = usecTimestampNow();
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auto properties = entityScriptingInterface->getEntityProperties(_hoverItemId);
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// check the format of this href string before we parse it
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QString hrefString = properties.getHref();
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auto cursor = Cursor::Manager::instance().getCursor();
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if (!hrefString.isEmpty()) {
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if (!hrefString.startsWith("hifi:")) {
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hrefString.prepend("hifi://");
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}
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// parse out a QUrl from the hrefString
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QUrl href = QUrl(hrefString);
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_hoverItemTitle = href.host();
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_hoverItemDescription = properties.getDescription();
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cursor->setIcon(Cursor::Icon::LINK);
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} else {
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_hoverItemTitle.clear();
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_hoverItemDescription.clear();
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cursor->setIcon(Cursor::Icon::DEFAULT);
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}
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}
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});
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connect(entityScriptingInterface.data(), &EntityScriptingInterface::hoverLeaveEntity, [=](const EntityItemID& entityItemID, const MouseEvent& event) {
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if (_hoverItemId == entityItemID) {
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_hoverItemId = _noItemId;
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_hoverItemTitle.clear();
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_hoverItemDescription.clear();
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auto cursor = Cursor::Manager::instance().getCursor();
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cursor->setIcon(Cursor::Icon::DEFAULT);
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if (!_tooltipId.isEmpty()) {
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qDebug() << "Closing tooltip " << _tooltipId;
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Tooltip::closeTip(_tooltipId);
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_tooltipId.clear();
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}
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}
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});
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_alphaPropertyAnimation.reset(new QPropertyAnimation(this, "alpha"));
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}
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ApplicationCompositor::~ApplicationCompositor() {
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}
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void ApplicationCompositor::bindCursorTexture(gpu::Batch& batch, uint8_t cursorIndex) {
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auto& cursorManager = Cursor::Manager::instance();
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auto cursor = cursorManager.getCursor(cursorIndex);
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auto iconId = cursor->getIcon();
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if (!_cursors.count(iconId)) {
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auto iconPath = cursorManager.getIconImage(cursor->getIcon());
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_cursors[iconId] = DependencyManager::get<TextureCache>()->
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getImageTexture(iconPath);
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}
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batch.setResourceTexture(0, _cursors[iconId]);
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}
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// Draws the FBO texture for the screen
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void ApplicationCompositor::displayOverlayTexture(RenderArgs* renderArgs) {
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PROFILE_RANGE(__FUNCTION__);
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if (_alpha <= 0.0f) {
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return;
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}
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gpu::FramebufferPointer overlayFramebuffer = qApp->getApplicationOverlay().getOverlayFramebuffer();
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if (!overlayFramebuffer) {
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return;
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}
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updateTooltips();
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//Handle fading and deactivation/activation of UI
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gpu::doInBatch(renderArgs->_context, [=](gpu::Batch& batch) {
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auto geometryCache = DependencyManager::get<GeometryCache>();
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geometryCache->useSimpleDrawPipeline(batch);
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batch.setViewportTransform(renderArgs->_viewport);
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batch.setModelTransform(Transform());
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batch.setViewTransform(Transform());
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batch.setProjectionTransform(mat4());
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batch.setResourceTexture(0, overlayFramebuffer->getRenderBuffer(0));
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geometryCache->renderUnitQuad(batch, vec4(vec3(1), _alpha));
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//draw the mouse pointer
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// Get the mouse coordinates and convert to NDC [-1, 1]
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vec2 canvasSize = qApp->getCanvasSize();
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vec2 mousePosition = toNormalizedDeviceScale(vec2(qApp->getMouse()), canvasSize);
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// Invert the Y axis
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mousePosition.y *= -1.0f;
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Transform model;
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model.setTranslation(vec3(mousePosition, 0));
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vec2 mouseSize = CURSOR_PIXEL_SIZE / canvasSize;
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model.setScale(vec3(mouseSize, 1.0f));
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batch.setModelTransform(model);
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bindCursorTexture(batch);
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geometryCache->renderUnitQuad(batch, vec4(1));
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});
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}
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vec2 ApplicationCompositor::getPolarCoordinates(const PalmData& palm) const {
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MyAvatar* myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
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glm::vec3 tip = myAvatar->getLaserPointerTipPosition(&palm);
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glm::vec3 relativePos = myAvatar->getDefaultEyePosition();
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glm::quat rotation = myAvatar->getOrientation();
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if (Menu::getInstance()->isOptionChecked(MenuOption::StandingHMDSensorMode)) {
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relativePos = _modelTransform.getTranslation();
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rotation = _modelTransform.getRotation();
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}
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glm::vec3 tipDirection = tip - relativePos;
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tipDirection = glm::inverse(rotation) * tipDirection;
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// Normalize for trig functions
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tipDirection = glm::normalize(tipDirection);
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// Convert to polar coordinates
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glm::vec2 polar(glm::atan(tipDirection.x, -tipDirection.z), glm::asin(tipDirection.y));
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return polar;
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}
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// Draws the FBO texture for Oculus rift.
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void ApplicationCompositor::displayOverlayTextureHmd(RenderArgs* renderArgs, int eye) {
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PROFILE_RANGE(__FUNCTION__);
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if (_alpha <= 0.0f) {
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return;
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}
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gpu::FramebufferPointer overlayFramebuffer = qApp->getApplicationOverlay().getOverlayFramebuffer();
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if (!overlayFramebuffer) {
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return;
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}
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updateTooltips();
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vec2 canvasSize = qApp->getCanvasSize();
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_textureAspectRatio = aspect(canvasSize);
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auto geometryCache = DependencyManager::get<GeometryCache>();
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gpu::doInBatch(renderArgs->_context, [=](gpu::Batch& batch) {
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geometryCache->useSimpleDrawPipeline(batch);
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batch.setResourceTexture(0, overlayFramebuffer->getRenderBuffer(0));
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mat4 camMat;
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_cameraBaseTransform.getMatrix(camMat);
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auto displayPlugin = qApp->getActiveDisplayPlugin();
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auto headPose = displayPlugin->getHeadPose(qApp->getFrameCount());
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auto eyeToHead = displayPlugin->getEyeToHeadTransform((Eye)eye);
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camMat = (headPose * eyeToHead) * camMat;
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batch.setViewportTransform(renderArgs->_viewport);
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batch.setViewTransform(camMat);
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batch.setProjectionTransform(qApp->getEyeProjection(eye));
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#ifdef DEBUG_OVERLAY
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{
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batch.setModelTransform(glm::translate(mat4(), vec3(0, 0, -2)));
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geometryCache->renderUnitQuad(batch, glm::vec4(1));
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}
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#else
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{
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batch.setModelTransform(_modelTransform);
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drawSphereSection(batch);
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}
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#endif
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vec3 reticleScale = vec3(Cursor::Manager::instance().getScale() * reticleSize);
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bindCursorTexture(batch);
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//Controller Pointers
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glm::mat4 overlayXfm;
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_modelTransform.getMatrix(overlayXfm);
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//Mouse Pointer
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glm::vec2 projection = screenToSpherical(qApp->getTrueMouse());
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mat4 pointerXfm = glm::mat4_cast(quat(vec3(-projection.y, projection.x, 0.0f))) * glm::translate(mat4(), vec3(0, 0, -1));
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mat4 reticleXfm = overlayXfm * pointerXfm;
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reticleXfm = glm::scale(reticleXfm, reticleScale);
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batch.setModelTransform(reticleXfm);
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geometryCache->renderUnitQuad(batch, glm::vec4(1), _reticleQuad);
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});
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}
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void ApplicationCompositor::computeHmdPickRay(glm::vec2 cursorPos, glm::vec3& origin, glm::vec3& direction) const {
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const glm::vec2 projection = overlayToSpherical(cursorPos);
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// The overlay space orientation of the mouse coordinates
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const glm::quat cursorOrientation(glm::vec3(-projection.y, projection.x, 0.0f));
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// The orientation and position of the HEAD, not the overlay
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glm::vec3 worldSpaceHeadPosition = qApp->getCamera()->getPosition();
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glm::quat worldSpaceOrientation = qApp->getCamera()->getOrientation();
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auto headPose = qApp->getHMDSensorPose();
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auto headOrientation = glm::quat_cast(headPose);
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auto headTranslation = extractTranslation(headPose);
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auto overlayOrientation = worldSpaceOrientation * glm::inverse(headOrientation);
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auto overlayPosition = worldSpaceHeadPosition - (overlayOrientation * headTranslation);
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if (Menu::getInstance()->isOptionChecked(MenuOption::StandingHMDSensorMode)) {
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overlayPosition = _modelTransform.getTranslation();
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overlayOrientation = _modelTransform.getRotation();
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}
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// Intersection in world space
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glm::vec3 worldSpaceIntersection = ((overlayOrientation * (cursorOrientation * Vectors::FRONT)) * _oculusUIRadius) + overlayPosition;
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origin = worldSpaceHeadPosition;
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direction = glm::normalize(worldSpaceIntersection - worldSpaceHeadPosition);
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}
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//Caculate the click location using one of the sixense controllers. Scale is not applied
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QPoint ApplicationCompositor::getPalmClickLocation(const PalmData *palm) const {
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QPoint rv;
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auto canvasSize = qApp->getCanvasSize();
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if (qApp->isHMDMode()) {
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glm::vec2 polar = getPolarCoordinates(*palm);
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glm::vec2 point = sphericalToScreen(-polar);
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rv.rx() = point.x;
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rv.ry() = point.y;
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} else {
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MyAvatar* myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
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glm::mat4 projection;
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qApp->getDisplayViewFrustum()->evalProjectionMatrix(projection);
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glm::quat invOrientation = glm::inverse(myAvatar->getOrientation());
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glm::vec3 eyePos = myAvatar->getDefaultEyePosition();
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glm::vec3 tip = myAvatar->getLaserPointerTipPosition(palm);
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glm::vec3 tipPos = invOrientation * (tip - eyePos);
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glm::vec4 clipSpacePos = glm::vec4(projection * glm::vec4(tipPos, 1.0f));
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glm::vec3 ndcSpacePos;
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if (clipSpacePos.w != 0) {
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ndcSpacePos = glm::vec3(clipSpacePos) / clipSpacePos.w;
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}
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rv.setX(((ndcSpacePos.x + 1.0f) / 2.0f) * canvasSize.x);
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rv.setY((1.0f - ((ndcSpacePos.y + 1.0f) / 2.0f)) * canvasSize.y);
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}
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return rv;
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}
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//Finds the collision point of a world space ray
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bool ApplicationCompositor::calculateRayUICollisionPoint(const glm::vec3& position, const glm::vec3& direction, glm::vec3& result) const {
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MyAvatar* myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
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glm::quat inverseOrientation = glm::inverse(myAvatar->getOrientation());
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glm::vec3 relativePosition = inverseOrientation * (position - myAvatar->getDefaultEyePosition());
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glm::vec3 relativeDirection = glm::normalize(inverseOrientation * direction);
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float t;
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if (raySphereIntersect(relativeDirection, relativePosition, _oculusUIRadius * myAvatar->getUniformScale(), &t)){
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result = position + direction * t;
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return true;
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}
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return false;
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}
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void ApplicationCompositor::buildHemiVertices(
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const float fov, const float aspectRatio, const int slices, const int stacks) {
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static float textureFOV = 0.0f, textureAspectRatio = 1.0f;
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if (textureFOV == fov && textureAspectRatio == aspectRatio) {
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return;
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}
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textureFOV = fov;
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textureAspectRatio = aspectRatio;
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auto geometryCache = DependencyManager::get<GeometryCache>();
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_hemiVertices = std::make_shared<gpu::Buffer>();
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_hemiIndices = std::make_shared<gpu::Buffer>();
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if (fov >= PI) {
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qDebug() << "TexturedHemisphere::buildVBO(): FOV greater or equal than Pi will create issues";
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}
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//UV mapping source: http://www.mvps.org/directx/articles/spheremap.htm
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vec3 pos;
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vec2 uv;
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// Compute vertices positions and texture UV coordinate
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// Create and write to buffer
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for (int i = 0; i < stacks; i++) {
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uv.y = (float)i / (float)(stacks - 1); // First stack is 0.0f, last stack is 1.0f
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// abs(theta) <= fov / 2.0f
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float pitch = -fov * (uv.y - 0.5f);
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for (int j = 0; j < slices; j++) {
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uv.x = (float)j / (float)(slices - 1); // First slice is 0.0f, last slice is 1.0f
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// abs(phi) <= fov * aspectRatio / 2.0f
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float yaw = -fov * aspectRatio * (uv.x - 0.5f);
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pos = getPoint(yaw, pitch);
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static const vec4 color(1);
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_hemiVertices->append(sizeof(pos), (gpu::Byte*)&pos);
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_hemiVertices->append(sizeof(vec2), (gpu::Byte*)&uv);
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_hemiVertices->append(sizeof(vec4), (gpu::Byte*)&color);
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}
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}
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// Compute number of indices needed
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static const int VERTEX_PER_TRANGLE = 3;
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static const int TRIANGLE_PER_RECTANGLE = 2;
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int numberOfRectangles = (slices - 1) * (stacks - 1);
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_hemiIndexCount = numberOfRectangles * TRIANGLE_PER_RECTANGLE * VERTEX_PER_TRANGLE;
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// Compute indices order
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std::vector<GLushort> indices;
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for (int i = 0; i < stacks - 1; i++) {
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for (int j = 0; j < slices - 1; j++) {
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GLushort bottomLeftIndex = i * slices + j;
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GLushort bottomRightIndex = bottomLeftIndex + 1;
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GLushort topLeftIndex = bottomLeftIndex + slices;
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GLushort topRightIndex = topLeftIndex + 1;
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// FIXME make a z-order curve for better vertex cache locality
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indices.push_back(topLeftIndex);
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indices.push_back(bottomLeftIndex);
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indices.push_back(topRightIndex);
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indices.push_back(topRightIndex);
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indices.push_back(bottomLeftIndex);
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indices.push_back(bottomRightIndex);
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}
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}
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_hemiIndices->append(sizeof(GLushort) * indices.size(), (gpu::Byte*)&indices[0]);
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}
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void ApplicationCompositor::drawSphereSection(gpu::Batch& batch) {
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buildHemiVertices(_textureFov, _textureAspectRatio, 80, 80);
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static const int VERTEX_DATA_SLOT = 0;
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static const int TEXTURE_DATA_SLOT = 1;
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static const int COLOR_DATA_SLOT = 2;
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auto streamFormat = std::make_shared<gpu::Stream::Format>(); // 1 for everyone
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streamFormat->setAttribute(gpu::Stream::POSITION, VERTEX_DATA_SLOT, gpu::Element(gpu::VEC3, gpu::FLOAT, gpu::XYZ), 0);
|
|
streamFormat->setAttribute(gpu::Stream::TEXCOORD, TEXTURE_DATA_SLOT, gpu::Element(gpu::VEC2, gpu::FLOAT, gpu::UV));
|
|
streamFormat->setAttribute(gpu::Stream::COLOR, COLOR_DATA_SLOT, gpu::Element(gpu::VEC4, gpu::FLOAT, gpu::RGBA));
|
|
batch.setInputFormat(streamFormat);
|
|
|
|
static const int VERTEX_STRIDE = sizeof(vec3) + sizeof(vec2) + sizeof(vec4);
|
|
|
|
if (_prevAlpha != _alpha) {
|
|
// adjust alpha by munging vertex color alpha.
|
|
// FIXME we should probably just use a uniform for this.
|
|
float* floatPtr = reinterpret_cast<float*>(_hemiVertices->editData());
|
|
const auto ALPHA_FLOAT_OFFSET = (sizeof(vec3) + sizeof(vec2) + sizeof(vec3)) / sizeof(float);
|
|
const auto VERTEX_FLOAT_STRIDE = (sizeof(vec3) + sizeof(vec2) + sizeof(vec4)) / sizeof(float);
|
|
const auto NUM_VERTS = _hemiVertices->getSize() / VERTEX_STRIDE;
|
|
for (size_t i = 0; i < NUM_VERTS; i++) {
|
|
floatPtr[i * VERTEX_FLOAT_STRIDE + ALPHA_FLOAT_OFFSET] = _alpha;
|
|
}
|
|
}
|
|
|
|
gpu::BufferView posView(_hemiVertices, 0, _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::POSITION)._element);
|
|
gpu::BufferView uvView(_hemiVertices, sizeof(vec3), _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::TEXCOORD)._element);
|
|
gpu::BufferView colView(_hemiVertices, sizeof(vec3) + sizeof(vec2), _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::COLOR)._element);
|
|
batch.setInputBuffer(VERTEX_DATA_SLOT, posView);
|
|
batch.setInputBuffer(TEXTURE_DATA_SLOT, uvView);
|
|
batch.setInputBuffer(COLOR_DATA_SLOT, colView);
|
|
batch.setIndexBuffer(gpu::UINT16, _hemiIndices, 0);
|
|
batch.drawIndexed(gpu::TRIANGLES, _hemiIndexCount);
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::directionToSpherical(const glm::vec3& direction) {
|
|
glm::vec2 result;
|
|
// Compute yaw
|
|
glm::vec3 normalProjection = glm::normalize(glm::vec3(direction.x, 0.0f, direction.z));
|
|
result.x = glm::acos(glm::dot(IDENTITY_FRONT, normalProjection));
|
|
if (glm::dot(IDENTITY_RIGHT, normalProjection) > 0.0f) {
|
|
result.x = -glm::abs(result.x);
|
|
} else {
|
|
result.x = glm::abs(result.x);
|
|
}
|
|
// Compute pitch
|
|
result.y = angleBetween(IDENTITY_UP, direction) - PI_OVER_TWO;
|
|
|
|
return result;
|
|
}
|
|
|
|
glm::vec3 ApplicationCompositor::sphericalToDirection(const glm::vec2& sphericalPos) {
|
|
glm::quat rotation(glm::vec3(sphericalPos.y, sphericalPos.x, 0.0f));
|
|
return rotation * IDENTITY_FRONT;
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::screenToSpherical(const glm::vec2& screenPos) {
|
|
auto screenSize = qApp->getCanvasSize();
|
|
glm::vec2 result;
|
|
result.x = -(screenPos.x / screenSize.x - 0.5f);
|
|
result.y = (screenPos.y / screenSize.y - 0.5f);
|
|
result.x *= MOUSE_YAW_RANGE;
|
|
result.y *= MOUSE_PITCH_RANGE;
|
|
return result;
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::sphericalToScreen(const glm::vec2& sphericalPos) {
|
|
glm::vec2 result = sphericalPos;
|
|
result.x *= -1.0f;
|
|
result /= MOUSE_RANGE;
|
|
result += 0.5f;
|
|
result *= qApp->getCanvasSize();
|
|
return result;
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::sphericalToOverlay(const glm::vec2& sphericalPos) const {
|
|
glm::vec2 result = sphericalPos;
|
|
result.x *= -1.0f;
|
|
result /= _textureFov;
|
|
result.x /= _textureAspectRatio;
|
|
result += 0.5f;
|
|
result *= qApp->getUiSize();
|
|
return result;
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::overlayToSpherical(const glm::vec2& overlayPos) const {
|
|
glm::vec2 result = overlayPos;
|
|
result /= qApp->getUiSize();
|
|
result -= 0.5f;
|
|
result *= _textureFov;
|
|
result.x *= _textureAspectRatio;
|
|
result.x *= -1.0f;
|
|
return result;
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::screenToOverlay(const glm::vec2& screenPos) const {
|
|
return sphericalToOverlay(screenToSpherical(screenPos));
|
|
}
|
|
|
|
glm::vec2 ApplicationCompositor::overlayToScreen(const glm::vec2& overlayPos) const {
|
|
return sphericalToScreen(overlayToSpherical(overlayPos));
|
|
}
|
|
|
|
void ApplicationCompositor::updateTooltips() {
|
|
if (_hoverItemId != _noItemId) {
|
|
quint64 hoverDuration = usecTimestampNow() - _hoverItemEnterUsecs;
|
|
if (_hoverItemEnterUsecs != UINT64_MAX && !_hoverItemTitle.isEmpty() && hoverDuration > TOOLTIP_DELAY) {
|
|
// TODO Enable and position the tooltip
|
|
_hoverItemEnterUsecs = UINT64_MAX;
|
|
_tooltipId = Tooltip::showTip(_hoverItemTitle, _hoverItemDescription);
|
|
}
|
|
}
|
|
}
|
|
|
|
static const float FADE_DURATION = 500.0f;
|
|
void ApplicationCompositor::fadeIn() {
|
|
_fadeInAlpha = true;
|
|
|
|
_alphaPropertyAnimation->setDuration(FADE_DURATION);
|
|
_alphaPropertyAnimation->setStartValue(_alpha);
|
|
_alphaPropertyAnimation->setEndValue(1.0f);
|
|
_alphaPropertyAnimation->start();
|
|
}
|
|
void ApplicationCompositor::fadeOut() {
|
|
_fadeInAlpha = false;
|
|
|
|
_alphaPropertyAnimation->setDuration(FADE_DURATION);
|
|
_alphaPropertyAnimation->setStartValue(_alpha);
|
|
_alphaPropertyAnimation->setEndValue(0.0f);
|
|
_alphaPropertyAnimation->start();
|
|
}
|
|
|
|
void ApplicationCompositor::toggle() {
|
|
if (_fadeInAlpha) {
|
|
fadeOut();
|
|
} else {
|
|
fadeIn();
|
|
}
|
|
}
|