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Creating An Animation Program Part 2 Alice
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Method A segment of program code (instructions) that defines how to perform a specific task.
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Do In Order Do a set of instructions in sequential order
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Do Together Two or more things to occur at the same time
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Nesting One program statement is written inside another program statement.
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Bugs Error in computer programs. (The object doesn’t do what you told it to do.) Once the BUGS are removed, you have successfully DEBUGGED the program
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Property Change an aspect of an object or world
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Open “Snowpeople Scenario” Make the snowwoman’s head turn red as if she is blushing after the snowman comes over to the group.
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Comments Are not instructions that cause some action to take place. The program will ignore comments when it is running USEFUL When someone else want to read your code
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Assignment Read Chapter 2, Section 2 A First Program Read Tips & Techniques 2, Orientation and Movement Instructions
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MOVE Is called a TRANSITIONAL move Left Right Up Down Forward Backward Egocentric – Object move is relative to its own orientation
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Turn Rotational motion Left Right Forward Backward Rotational motion Left Right Roll Add an AXES (shapes) to an object and make the axes a “Vehicle to” the other object
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Subpart Rotation When a subpart is selected, the turn or roll is at the PIVOT point. Which is usually the joint.
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Orient To When 2 objects MUST move together. The orientation of the 2 objects must be synchronized. They will have the same sense of UP, DOWN, LEFT, RIGHT, FORWARD, BACKWARD
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Vehicle Method Another way to synchronize the movements of 2 objects. Under PROPERTIES Choose VEHICLE
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Arguments: Duration, Style, asSeenBy Duration – An amount of time (seconds) “0” – instantaneous movement Negatives are not used Style – How one movement BLENDS into next asSeenBy – Uses the orientation of one object to guide the movement of another object
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Turn to Face & Point At Turn to Face – Causes one object to pivot around until its front is facing some other object Point At – Aligns two objects from the center of one of the center of another onlyAffectYaw (true) – Object points at another object without tipping
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Move Moving an object in relation to the location of another object Moves an object to a specific location in the world
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Lab Chapter 2 Lab Exercises
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