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## Phun

Differences between revisions 1 and 19 (spanning 18 versions)
 ⇤ ← Revision 1 as of 2008-05-29 22:35:56 → Size: 760 Editor: 71-218-47-179 Comment: ← Revision 19 as of 2008-06-21 00:46:21 → ⇥ Size: 4876 Editor: 75-171-254-185 Comment: Added Laws and question Deletions are marked like this. Additions are marked like this. Line 1: Line 1: Phun is a simple 2D game/simulator where you enter simple situations and get simple results. I will be showing how to make games using the laws of physics. Phun is a 2D game/simulator where you enter simple situations and are shown the results in a visual format. I will be showing how to make games using the laws of physics. [[BR]][[BR]]Note on formatting:[[BR]]Sub-window names are ''italicized''.= Game 1: Racing =[[BR]]First we will make a monocycle. This lesson will teach students about gravity and inertia.== Step 1 ==[[BR]]Change the settings. At the top of the screen should be a sub-window called ''Options''. If this is not there, click on the options button in the ''Phun beta'' sub-window.[[BR]]The following should be on: *Draw Hinges/Fixes when running *Gravity *Friction *Draw Inside ObjectsThe rest are relatively insignificant.== Step 2 ==Make the racing surface.[[BR]]Select the Plane tool from the ''Toolbar''. Pick a point in the lower one-forth, drag your mouse strait up and let go.[[BR]]You should have a ground now.== Step 3 == Line 3: Line 21: Note on formatting:Sub-window names are ''italicized''. [[BR]]Make the monocycle![[BR]]Start by drawing a circle with the circle tool near the ground.[[BR]]Draw a box using the box tool. Start below the bottom of the circle and to the right of the center of the circle and go to the left of the center of the circle and a little above the center of the circle. The box should hang down from the center and protrude.=== Step 3.1 ===[[BR]]Make the motor on the monocycle. Right-click on the circle, go to Geometry settings>Add center hinge. Right click on the hinge and go to Hinges>[[BR]]Check the following:[[BR]]Motor[[BR]]Control with arrow keys==== Testing ====[[BR]]Press space to test it.[[BR]][[BR]]Woah! What happened? It's gone![[BR]]Actually, it isn't. It just flew up so fast that you couldn't see it. Why? It the pendulum was hanging down into the ground. The fastest way to remove that was to fling it straight up. (To see the flung moncycle, right-click anywhere on the screen where there isn't any objects. Use the pan and/or zoom to find it.)[[BR]](If the pendulum hangs inside the circle, that's OK. Just follow these instructions anyway to learn about collisions in Phun.)[[BR]][[BR]]To go back to the editing screen press Ctrl-Z or click Undo Sim Start in the ''Control'' window.[[BR]](If you Panned/Zoomed before, Pan/Zoom back.)== Step 4 ==[[BR]]Right-Click on the pendulum. Go to the Collision menu... > [[BR]]Un-check all boxes.=== Testing ===[[BR]]Press space to start.[[BR]][[BR]]Press the left arrow key. The pendulum should move left, followed shortly by the cycle.[[BR]]Press the right arrow key. The pendulum should move right, followed shortly by the cycle.[[BR]][[BR]]Isn't very interesting though, is it? Let's add an AI player. (Actually, the intelligence part of artificial intelligence is kind of a stretch.)== Step 5 ==[[BR]]Make the AI player. [[BR]][[BR]]Select the brush tool, and draw a closed shape around the mono cycle. It should be flashing now. Go to the ''Options'' window and un-check Draw inside objects. Hold down Control and drag the monocycle until the two monocycles do not intersect. Right click on the hinge of the AI player. Go to Hinges... > [[BR]]Uncheck Controlled by arrow keys.Monocycle-RPM-change.png[[BR]]Right-Click your monocycle body. Go to Collision Menu... >[[BR]]Only Check: *Collision group ARight-Click the AI's monocycle body. Go to Collision Menu... >[[BR]]Only Check: *Collision group BYou now have a controllable monocycle plus one to race against.[[BR]][[BR]]Optional: Make things more interesting by setting the speed of both hinges to 45 rpm instead of 15.[attachment:Monocycle-RPM-change.png] Line 6: Line 64: = Game 1: Racing = = Game 1 questions =Newton's Laws: Line 8: Line 67: First we will make a monocycle. This lesson will teach students about gravity and inertia. *Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. Line 10: Line 69: == Step 1 == *Newton's Second Law: F,,orce (newtons),, = M,,ass (kilograms),,xA,,ccelleration (meters/second/second),, This relates to the amount of force acting on an object. (Note: Obviously, the acceleration is is the same direction as the force.) Example: You pull a 1KG (2.2 pounds) weight across a frictionless floor where there is no air resistance with a force of 1 newton, it accelerates at 1m/s/s (2.24 miles/hour/second). This means that at second zero it isn't going anywhere. At second one it is going at 2.24 miles an hour. At second two it is going 4.48 miles an hour. *Newton's Third Law states that every action has an equal and opposite reaction. Line 12: Line 76: Change the settings. At the top of the screen should be a sub-window called ''Options''. If this is not there, click on the options button in the ''Phun beta'' sub-window. Identify and answer: Line 14: Line 78: The following should be on:Draw Hinges/Fixes when runningGravityFrictionDraw Inside Objects When the pendulum is moving clockwise, what direction is the it rotating? ''Conter-Clockwise''What law is in action? ''Third'' Line 20: Line 81: The rest are fairly insignificant. If you take your hand off the keys while the cycle is moving, it stops (eventually). Why? ''Friction''What law is in action? ''First'' Line 22: Line 84: == Step 2 == = Bibliography = Line 24: Line 86: Make the racing surface. Select the Plane tool from the ''Toolbar''. Pick Newton's Laws: [http://hyperphysics.phy-astr.gsu.edu/Hbase/Newt.html]

Phun is a 2D game/simulator where you enter simple situations and are shown the results in a visual format. I will be showing how to make games using the laws of physics. BR BRNote on formatting: BRSub-window names are italicized.

# Game 1: Racing

BRFirst we will make a monocycle. This lesson will teach students about gravity and inertia.

## Step 1

BRChange the settings. At the top of the screen should be a sub-window called Options. If this is not there, click on the options button in the Phun beta sub-window. BRThe following should be on:

• Draw Hinges/Fixes when running
• Gravity
• Friction
• Draw Inside Objects

The rest are relatively insignificant.

## Step 2

Make the racing surface. BRSelect the Plane tool from the Toolbar. Pick a point in the lower one-forth, drag your mouse strait up and let go. BRYou should have a ground now.

## Step 3

BRMake the monocycle! BRStart by drawing a circle with the circle tool near the ground. BRDraw a box using the box tool. Start below the bottom of the circle and to the right of the center of the circle and go to the left of the center of the circle and a little above the center of the circle. The box should hang down from the center and protrude.

### Step 3.1

BRMake the motor on the monocycle. Right-click on the circle, go to Geometry settings>Add center hinge. Right click on the hinge and go to Hinges> BRCheck the following: BRMotor BRControl with arrow keys

#### Testing

BRPress space to test it. BR BRWoah! What happened? It's gone! BRActually, it isn't. It just flew up so fast that you couldn't see it. Why? It the pendulum was hanging down into the ground. The fastest way to remove that was to fling it straight up. (To see the flung moncycle, right-click anywhere on the screen where there isn't any objects. Use the pan and/or zoom to find it.) BR(If the pendulum hangs inside the circle, that's OK. Just follow these instructions anyway to learn about collisions in Phun.) BR BRTo go back to the editing screen press Ctrl-Z or click Undo Sim Start in the Control window. BR(If you Panned/Zoomed before, Pan/Zoom back.)

## Step 4

BRRight-Click on the pendulum. Go to the Collision menu... > BRUn-check all boxes.

### Testing

BRPress space to start. BR BRPress the left arrow key. The pendulum should move left, followed shortly by the cycle. BRPress the right arrow key. The pendulum should move right, followed shortly by the cycle. BR BRIsn't very interesting though, is it? Let's add an AI player. (Actually, the intelligence part of artificial intelligence is kind of a stretch.)

## Step 5

BRMake the AI player. BR BRSelect the brush tool, and draw a closed shape around the mono cycle. It should be flashing now. Go to the Options window and un-check Draw inside objects. Hold down Control and drag the monocycle until the two monocycles do not intersect. Right click on the hinge of the AI player. Go to Hinges... > BRUncheck Controlled by arrow keys.Monocycle-RPM-change.png BRRight-Click your monocycle body. Go to Collision Menu... > BROnly Check:

• Collision group A

Right-Click the AI's monocycle body. Go to Collision Menu... > BROnly Check:

• Collision group B

You now have a controllable monocycle plus one to race against. BR BROptional: Make things more interesting by setting the speed of both hinges to 45 rpm instead of 15. [attachment:Monocycle-RPM-change.png]

# Game 1 questions

Newton's Laws:

• Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
• Newton's Second Law:

Force (newtons) = Mass (kilograms)xAccelleration (meters/second/second) This relates to the amount of force acting on an object. (Note: Obviously, the acceleration is is the same direction as the force.) Example: You pull a 1KG (2.2 pounds) weight across a frictionless floor where there is no air resistance with a force of 1 newton, it accelerates at 1m/s/s (2.24 miles/hour/second). This means that at second zero it isn't going anywhere. At second one it is going at 2.24 miles an hour. At second two it is going 4.48 miles an hour.

• Newton's Third Law states that every action has an equal and opposite reaction.