Method updateState

src/SkyboltExamples/ExamplesCommon/HudSystem.cpp:155–220

}

void HudSystem::updateState()
{
	bool showHud = false;
	if (mEntity && mEnabled)
	{
		osg::Viewport* viewport = mParentCamera->getViewport();
		mHud->setAspectRatio(viewport->width() / viewport->height());

		Node* node = mEntity->getFirstComponent<Node>().get();
		Motion* motion = mEntity->getFirstComponent<Motion>().get();

		if (node && motion)
		{
			showHud = true;
			mHud->clear();

			LatLonAlt lla = toLatLonAlt(GeocentricPosition(node->getPosition())).position;
			Quaternion ltpOrientation = toLtpNed(GeocentricOrientation(node->getOrientation()), toLatLon(lla)).orientation;
			Vector3 euler = math::eulerFromQuat(ltpOrientation);

			mHeadingRibbon->draw(euler.z * math::radToDegD());

			Quaternion uprightYawFrameOrientation = toGeocentric(LtpNedOrientation(glm::angleAxis(euler.z, Vector3(0, 0, 1))), toLatLon(lla)).orientation;
			const Vector3 uprightLocalVel = glm::inverse(uprightYawFrameOrientation) * motion->linearVelocity;
			const glm::vec2 uprightLocalVel2d(uprightLocalVel.x, uprightLocalVel.y);

			if (glm::length(uprightLocalVel2d) < 10)
			{
				mHoverVelModel->draw(uprightLocalVel2d);
			}

			if (mPitchLadderVisible)
			{
				double verticalFov = mVerticalFovProvider();
				mPitchLadder->setPitchGapHeight(2.0 * pitchLadderAngleIncrement / verticalFov);
				mPitchLadder->draw(euler.y, euler.x);
			}

			mHud->drawText(glm::vec2(-0.4, 0.35), toIntString(glm::length(motion->linearVelocity) * metersPerSecToKnots));

			mAltitudeBar->draw(lla.alt);
			mHud->drawText(glm::vec2(0.4, 0.35), toIntString(lla.alt * metersToFeet));

			mRollAngleRibbon->draw(euler.x * math::radToDegD());

			drawVee(*mHud, glm::vec2(0));

			ControlInputsComponent* controlInputsComponents = mEntity->getFirstComponent<ControlInputsComponent>().get();
			if (controlInputsComponents)
			{
				drawControlInputs(*mHud, glm::vec2(-0.8), *controlInputsComponents);
			}
		}
	}

	if (showHud && !mInScene)
	{
		mParentCamera->addChild(mHud);