Web Dev Bootcamp TIL Day-7(Game Project Cont.)

We must keep in mind that we are working in a coordinate system when inputting positions for stages and characters

• Top left corner of the screen is (x, y) = (0, 0)
• Bottom right corner of the screen is (x, y) = (screen width, screen height)
• ex) the (x, y) coordinates for the center of a ball will be: (self.rect.x + self.ball_rad, self.rect.y + self.ball_rad)

Set binary indicators to show the state of the game

• ex) for game is not over ----- > game_over = 0
• ex) for wall is destroyed ------> wall_destroyed = 1

Use print statement to test functions between the addition of new class / features

 

 

Checking for collision

• check if the absolute value between the coordinates of two objects is below a certain threshold
• can combine w/ another condition such as the ball is moving downwards

#if collision occurs from bottom of ball/top of block and ball is moving downwards
if abs(self.rect.bottom - item[0].top) < collision_thresh and self.speed_y > 0:
    self.speed_y *= -1

 

 

Using Temp Variable to swap values

a = 11
b = 7

temp = a
a = b
b = temp