Drawing

Introduction

The VR Robot uses a pen to draw on a playground as it moves. The robot’s pen can change width, color, and fill entire playgrounds.

Below is a list of all available blocks:

Actions – Change the state of the pen and filled colors of playgrounds and other drawings.

• move – Raise or lower the robot’s pen.

• fill – Fill a playground or an enclosed area with a specified color.

Mutators – Modify the color and width of the pen.

• set_pen_color – Set the color of the robot’s pen from preset options.

• set_pen_width – Set the width of the robot’s pen.

• set_pen_color_rgb – Set the color of the robot’s pen with red, green, and blue values.

Actions

move

move sets the position of the VR Pen.

Usage:
pen.move(action)

Parameters	Description
action	The set position of the VR Pen: DOWN – Allows the pen to draw on the playground. UP – Stops the pen from drawing on the playground.

def main():
    # Draw a straight line.
    pen.move(DOWN)
    drivetrain.drive_for(FORWARD, 400, MM)

# VR threads — Do not delete
vr_thread(main)

fill

fill fills in the shape of whatever the VR Pen is on top of, for example:

Grid lines	Grid square	On Playgrounds with no grid, it fills the entire Playground floor.

Usage:
pen.fill(red, green, blue, opacity)

Parameters	Description
red	The intensity of the color red in the RGB value, ranging from 0 to 255.
green	The intensity of the color green in the RGB value, ranging from 0 to 255.
blue	The intensity of the color blue in the RGB value, ranging from 0 to 255.
opacity	The transparency of the VR Pen’s color, ranging from 0 to 100 percent.

def main():
    # Fill the playground's floor with blue at full opacity.
    pen.fill(43, 162, 202, 100)

# VR threads — Do not delete
vr_thread(main)

Mutators

set_pen_color

set_pen_color sets the color of the VR Pen from preset options.

Usage:
pen.set_pen_color(color)

Parameters	Description
color	The color of the VR Pen: BLACK, RED, GREEN, or BLUE.

def main():
    # Draw a blue line
    pen.move(DOWN)
    pen.set_pen_color(BLUE)
    drivetrain.drive_for(FORWARD, 400, MM)

# VR threads — Do not delete
vr_thread(main)

set_pen_width

set_pen_width method is used to set the width of the VR Pen.

Usage:
pen.set_pen_width(width)

Parameters	Description
width	The width of the VR Pen: EXTRA_THIN THIN (default) MEDIUM WIDE EXTRA-WIDE

def main():
    # Draw a straight line of medium width
    pen.move(DOWN)
    pen.set_pen_width(MEDIUM)
    drivetrain.drive_for(FORWARD, 400, MM)

# VR threads — Do not delete
vr_thread(main)

set_pen_color_rgb

set_pen_color_rgb method is used to set the RGB and opacity values for the VR Pen’s color.

Usage:
pen.set_pen_color_rgb(red, green, blue, opacity)

Parameters	Description
red	The intensity of the color red in the RGB value, ranging from 0 to 255.
green	The intensity of the color green in the RGB value, ranging from 0 to 255.
blue	The intensity of the color blue in the RGB value, ranging from 0 to 255.
opacity	The transparency of the VR Pen’s color, ranging from 0 to 100 percent.

def main():
    # Draw an orange line
    pen.move(DOWN)
    pen.set_pen_color_rgb(225, 112, 52, 100)
    drivetrain.drive_for(FORWARD, 400, MM)

# VR threads — Do not delete
vr_thread(main)