Your IP : 216.73.216.48
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE StepCoreXML>
<world xmlns="http://edu.kde.org/step/StepCoreXML" version="1.0" id="1">
<name>world1</name>
<color>#ffffffff</color>
<time>38.4399999999994</time>
<timeScale>1</timeScale>
<errorsCalculation>false</errorsCalculation>
<item class="Spring" id="2">
<name>spring1</name>
<color>#ff00ff00</color>
<restLength>1.2</restLength>
<stiffness>1</stiffness>
<damping>0</damping>
<body1>8</body1>
<body2>9</body2>
<localPosition1>(0,0)</localPosition1>
<localPosition2>(0,0)</localPosition2>
</item>
<item class="Note" id="3">
<name>note1</name>
<color>#ff000000</color>
<position>(0,2.88)</position>
<size>(200,60)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p align="center" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-size:14pt; font-weight:600;">Tutorial 1</span></p>
<p align="center" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-size:12pt;">Bodies and springs.</span></p></body></html></text>
</item>
<item class="Note" id="4">
<name>note2</name>
<color>#ff000000</color>
<position>(-2.2,-0.18)</position>
<size>(300,258)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-weight:600;">Position and velocity</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- You can change position of any body simply by dragging it.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Click on one of the disks to select it. Now you can see two arrows on it: blue arrow depicts the velocity and red arrow depicts the acceleration. You can drag the little gray square at the end of the velocity arrow to change the velocity.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Take a look at the Properties panel on the right. Here you can numerically set position and velocity (as well as all other properties) for the current body.</p></body></html></text>
</item>
<item class="Note" id="5">
<name>note3</name>
<color>#ff000000</color>
<position>(-2.2,-2.36)</position>
<size>(300,182)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-weight:600;">Properties</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Take a look at the Properties panel on the right. Here you can numerically set position and velocity (as well as all other properties) for the current body.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Select a spring by clicking on it. Change its stiffness and see how it is affecting the simulation.</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"></p></body></html></text>
</item>
<item class="Note" id="6">
<name>note4</name>
<color>#ff000000</color>
<position>(2.2,1.58)</position>
<size>(300,200)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-weight:600;">Quest</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Try to change the system in a way to make the disks spining around the center of the system.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Now try to change the properties of the spring in order to make its length constant while the disks are spinning.</p></body></html></text>
</item>
<item class="Note" id="7">
<name>note5</name>
<color>#ff000000</color>
<position>(2.2,-0.46)</position>
<size>(300,234)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-weight:600;">More bodies</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- In order to create a body click on its icon in the Palette panel and follow the instructions given in the information widget in the top left corner of scene</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Create one more disk and two more springs and connect all the items in the triangle. Now make them all spin around the center.</p></body></html></text>
</item>
<item class="Disk" id="8">
<name>disk1</name>
<color>#ff000000</color>
<position>(0,0.7)</position>
<angle>0</angle>
<velocity>(0,0.2326)</velocity>
<angularVelocity>0</angularVelocity>
<mass>1</mass>
<inertia>0.0601</inertia>
<radius>0.3</radius>
</item>
<item class="Disk" id="9">
<name>disk2</name>
<color>#ff000000</color>
<position>(0,-0.7)</position>
<angle>0</angle>
<velocity>(0,-0.2326)</velocity>
<angularVelocity>0</angularVelocity>
<mass>1</mass>
<inertia>0.0144</inertia>
<radius>0.3</radius>
</item>
<item class="Note" id="10">
<name>note6</name>
<color>#ff000000</color>
<position>(-2.2,1.74)</position>
<size>(300,166)</size>
<text><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-weight:600;">Simulation</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- Click on the "Simulate" button in the toolbar to start simulation. Click on the same button again to stop it.</p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">- After stopping the simulation you can revert to the initial state by pressing Undo button.</p></body></html></text>
</item>
<solver class="AdaptiveEulerSolver" id="11">
<name>solver1</name>
<stepSize>1</stepSize>
<toleranceAbs>0.001</toleranceAbs>
<toleranceRel>0.001</toleranceRel>
</solver>
<collisionSolver class="GJKCollisionSolver" id="12">
<name>collisionSolver1</name>
<toleranceAbs>0.001</toleranceAbs>
</collisionSolver>
<constraintSolver class="CGConstraintSolver" id="13">
<name>constraintSolver1</name>
</constraintSolver>
</world>