Programming 302

1. What would happen if we only used the {"func":"blockPhysicsApplyImpulse","values":[{"type":"number","value":"50"}]} block instead of the {"func":"blockPhysicsApplyImpulse","values":[{"type":"wrapper","func":"valueOpMultiply","values":[{"type":"wrapper","func":"valueSensingTimer"},{"type":"number","value":"50"}]}]} block?

• The cannonball would always travel with the same impulse whenever it was fired
• The cannonball would travel farther the longer the mouse was held
• The cannonball would travel shorter the longer the mouse was held
• The cannonball would not be able to move

2. What will this code block do to an Actor? {"func":"blockPhysicsApplyImpulse","values":[{"type":"number","value":"-50"}]}

• It will push the Actor backwards away from whatever direction it's facing
• It will push the Actor forward towards whatever direction it's facing
• It will always push the Actor up regardless of what direction it's facing
• It will always push the Actor down regardless of what direction it's facing

3. What direction does this block apply the impulse in? {"func":"blockPhysicsApplyImpulse","values":[{"type":"number","value":"50"}]}

• It applies the impulse in the direction the Actor is facing
• It applies the impulse along the y axis
• It applies the impulse along the x axis
• It applies the impulse towards the left side of the screen

4. True or false: You can apply multiple impulses to an Actor.

• True
• False

5. Taylor wants to program a game where her Actor jumps when the up key is pressed. Instead of using the Change Y By block, Taylor wants to apply an impulse upwards. Which of these code blocks will help her program her character to jump up using an impulse?

• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockPhysicsApplyImpulseAngle","values":[{"type":"number","value":"50"},{"type":"number","value":"0"}]}}
• {"func":"blockControlForeverIf","values":[{"type":"wrapper","func":"valueSensingKeyPressed","values":[{"type":"choice","value":"space"}]}],"containers":[{"func":"blockPhysicsApplyImpulse","values":[{"type":"number","value":"0"}]}]}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockPhysicsSetRestitution","values":[{"type":"number","value":"50"}]}}
• {"func":"registerKeyTrigger","values":[{"type":"choice","value":"up arrow"}],"next":{"func":"blockPhysicsStart"}}

6. How many Actors can you animate at once?

• As many as you want
• Only 5 Actors can be animated on the Stage at any given time
• Only one Actor at a time
• You cannot animate Actors

7. If you have an Actor with the following code, how would you make it animate? {"func":"registerKeyTrigger","values":[{"type":"choice","value":"space"}],"next":{"func":"blockLooksNextCostume"}}

• Press the space bar over and over
• Just press Play and watch
• You can't animate this Actor
• Click on the Actor

8. Wendy is looping through her Actor's Costumes. She wants her character's dancing Costumes to animate faster than the other Costumes. The Actor's dancing Costumes are the first 8. Which code blocks can help her do this?

• {"func":"blockControlForever","containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlIf","values":[{"type":"wrapper","func":"valueOpGreater","values":[{"type":"wrapper","func":"valueLooksCostumeNum"},{"type":"string","value":"8"}]}],"containers":[{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}]}}}]}
• {"func":"blockControlForever","containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlIf","values":[{"type":"wrapper","func":"valueOpLess","values":[{"type":"wrapper","func":"valueLooksCostumeNum"},{"type":"string","value":"9"}]}],"containers":[{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}]}}}]}
• {"func":"blockControlForever","containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlIf","values":[{"type":"wrapper","func":"valueOpEqual","values":[{"type":"wrapper","func":"valueLooksCostumeNum"},{"type":"string","value":"9"}]}],"containers":[{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".5"}]}}}]}
• {"func":"blockControlForever","containers":[{"func":"blockLooksNextCostume","next":{"func":"blockControlIf","values":[{"type":"wrapper","func":"valueOpGreater","values":[{"type":"wrapper","func":"valueLooksCostumeNum"},{"type":"string","value":"9"}]}],"containers":[{"func":"blockControlWait","values":[{"type":"number","value":"0.5"}]}],"next":{"func":"blockControlWait","values":[{"type":"number","value":"0.05"}]}}}]}

9. When you use keyboard controls to animate an Actor, you don't need a "Forever" loop.

• True
• False

10. Which code blocks are used to animate the black hole Actor to turn forever?

• {"func":"registerFlagTrigger","next":{"func":"blockPhysicsSetActive","values":[{"type":"boolean","value":"false"}],"next":{"func":"blockControlForever","containers":[{"func":"blockMotionTurnCCW","values":[{"type":"string","value":"5"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}}]}}}
• {"func":"registerFlagTrigger","next":{"func":"blockPhysicsSetActive","values":[{"type":"boolean","value":"false"}],"next":{"func":"blockControlRepeat","values":[{"type":"number","value":"10"}],"containers":[{"func":"blockMotionTurnCCW","values":[{"type":"string","value":"5"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}}]}}}
• {"func":"registerFlagTrigger","next":{"func":"blockPhysicsSetActive","values":[{"type":"boolean","value":"false"}],"next":{"func":"blockControlWhile","values":[{"type":"wrapper","func":"valuePhysicsIsActive"}],"containers":[{"func":"blockMotionTurnCCW","values":[{"type":"string","value":"5"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}}]}}}
• {"func":"registerFlagTrigger","next":{"func":"blockPhysicsSetActive","values":[{"type":"boolean","value":"false"}],"next":{"func":"blockControlRepeatUntil","values":[{"type":"wrapper","func":"valuePhysicsIsActive"}],"containers":[{"func":"blockMotionTurnCCW","values":[{"type":"string","value":"5"}],"next":{"func":"blockControlWait","values":[{"type":"number","value":".05"}]}}]}}}