Sha256: b2514a68e27a4d4f51c8f130659d0fadd1e76d3900965ddecdb340299aa3e2c4
Contents?: true
Size: 969 Bytes
Versions: 10
Compression:
Stored size: 969 Bytes
Contents
#
# Bounce.
#
# When the shape hits the edge of the window, it reverses its direction.
#
RAD = 60 # Width of the shape
X_SPEED = 2.8 # Speed of the shape
Y_SPEED = 2.2 # Speed of the shape
attr_reader :xpos, :ypos, :xdirection, :ydirection
def setup
size(640, 360)
no_stroke
frame_rate(30)
ellipse_mode(RADIUS)
# Set the starting position of the shape
@xpos = width/2
@ypos = height/2
@xdirection = 1 # Left or Right
@ydirection = 1 # Top to Bottom
end
def draw
background(102)
# Update the position of the shape
@xpos = xpos + ( X_SPEED * xdirection )
@ypos = ypos + ( Y_SPEED * ydirection )
# Test to see if the shape exceeds the boundaries of the screen
# If it does, reverse its direction by multiplying by -1
unless (RAD ... width - RAD).cover? xpos
@xdirection *= -1
end
unless (RAD ... height - RAD).cover? ypos
@ydirection *= -1
end
# Draw the shape
ellipse(xpos, ypos, RAD, RAD)
end
Version data entries
10 entries across 10 versions & 1 rubygems