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--- notes:cprog:spring2025:projects:mtb4 [2025/03/10 15:12] – created - external edit 127.0.0.1
+++ notes:cprog:spring2025:projects:mtb4 [2025/03/13 03:45] (current) – [power ups] bdildine
@@ Line 15: / Line 15: @@
 =====power ups=====
+It might be a good idea to implement structs to represent powerups. Within this struct, it would have an x and y value (this could be a struct in and of itself called point, which has two ints: x and y). The struct could also have a variable called type that represents what type of powerup it is, e.g., type = 1 for damage, and type = 2 for duplicating that ball. One easy way to represent all the possible powerups as integer values is through the use of enums (enumerations).
-====logic to implement====
+struct Powerup
+{
+ Point position;
+ int type;
+}
+struct Point
+{
+ int x,
+ int y
+};
+What is an enumerator?
+Microsoft definition: An enumeration type (or enum type) is a value type defined by a set of named constants of the underlying integral numeric type.
+this means that you can define named constants that have an underlying numeric value.
+Example:
+enum Teachers
+{
+ MATT = 1,
+ JOE = 2
+};
+instead of literally typing 1, you could just write MATT, and it would represent the value 1, but the type is enum, not int.
+Back to the context of powerups, you could make an enum as such:
+enum POWERUPS
+{
+ DUPLICATE = 1,
+ MOARDAMAGE = 2,
+ FASTER = 3
+};
+then make a struct:
+struct Powerup
+{
+ Point position;
+ POWERUPS type;
+}
+then create a struct with the desired powerup and position:
+<code>
+void main()
+{
+ Powerup *ptrPowerup;                          //create a pointer to a powerup
+ ptrPowerup->position.x = screen_width / 2;    //set x and y values of the point struct within the powerup
+ ptrPowerup->position.y = screen_height / 2;
+ ptrPowerup->type = DUPLICATE;                   //set the type variable within the powerup struct to DUPLICATE, which represent the underlying value of 1
+}
+</code>
+now everytime that you call ptrPowerup->type it will return DUPLICATE, which under the hood, represents 1.
+Some Power-Ups you could make could range from trivial to more difficult. One could be a Power-Up that increases the size of your paddle.
+You can accomplish this by checking if the Power-Up is active, then selecting a different region before drawing the paddle and the given coordinates.
+You will of course need to change the boundaries in which the ball collides with the bigger paddle as well.
+If you are using an array to track your Power-Ups, it would look something like:
+<code>
+if ( PowerUpCollected[1] == true )
+{
+    select_region( RegionLargePaddle );
+} else {
+    select_region( RegionPaddle );
+}
+draw_region_at( PaddleX, PaddleY );
+</code>

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