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# Draw a parabola using Arcade in Python3

• Difficulty Level : Expert
• Last Updated : 19 Oct, 2020

Arcade is a Python library which is used for developing 2Dimensional Games. Arcade needs support for OpenGL 3.3+. In arcade, basic drawing does not require knowledge on how to define functions or classes or how to do loops, simply we have inbuilt functions for drawing primitives.

Arcade inbuilt function for drawing parabola:-

1. arcade.draw_parabola_outline( ): This function draws the outline of a parabola.

Syntax: arcade.draw_parabola_outline(start_x , start_y, end_x , height , color, border_width, tilt_angle)

Parameters:

• start_x : The starting x position of the parabola
• start_y : The starting y position of the parabola
• end_x : The ending x position of the parabola
• height : The height of the parabola
• color : The color of the parabola
• border_width: The width of the parabola
• tilt_angle : The angle of the tilt of the parabola.

Example:

## Python3

 `# import module``import` `arcade`` ` `# Open the window. Set the window title and dimensions (width and height)``arcade.open_window(``600``, ``600``, ``"Draw  a parabola  for GfG "``)`` ` `# set background``arcade.set_background_color(arcade.color.WHITE)`` ` `# Start the render process.``arcade.start_render()`` ` `# function to draw a parabola``arcade.draw_parabola_outline(``50``, ``80``, ``100``, ``120``, arcade.color.GREEN, ``10``, ``0``)`` ` `# finish drawing``arcade.finish_render()`

Output:

2. arcade.draw_parabola_filled( ):This function is used to draw a color filed parabola.

Syntax: arcade.draw_parabola_outline(start_x , start_y, end_x , height , color, tilt_angle)

Parameters:

• start_x : The starting x position of the parabola
• start_y : The starting y position of the parabola
• end_x :The ending x position of the parabola
• height : The height of the parabola
• color : The color of the parabola
• tilt_angle : The angle of the tilt of the parabola.

Example :

## Python3

 `# import module``import` `arcade`` ` `# Open the window. Set the window title and dimensions (width and height)``arcade.open_window(``600``, ``600``, ``"Draw  a parabola  for GfG "``)`` ` `# set background``arcade.set_background_color(arcade.color.WHITE)`` ` `# Start the render process.``arcade.start_render()`` ` `# function to draw a parabola``arcade.draw_parabola_filled(``25``, ``80``, ``100``, ``110``, arcade.color.GREEN ,``0``)`` ` `# finish drawing``arcade.finish_render()`` ` `# to display everything``arcade.run()`

Output:

Example : Program to draw a rainbow using a series of parabola

## Python3

 `# import module``import` `arcade`` ` `# Open the window. Set the window title and dimensions (width and height)``arcade.open_window(``600``, ``600``, ``"Draw  a parabola  for GfG "``)`` ` `#set background``arcade.set_background_color(arcade.color.WHITE)`` ` `# Start the render process.``arcade.start_render()`` ` `# function to draw a rainbow parabola``arcade.draw_parabola_filled(``25``, ``80``, ``500``, ``300``, arcade.color.RED ,``0``)``arcade.draw_parabola_filled(``50``, ``80``, ``470``, ``280``, arcade.color.ORANGE ,``0``)``arcade.draw_parabola_filled(``75``, ``80``, ``440``, ``260``, arcade.color.YELLOW ,``0``)``arcade.draw_parabola_filled(``100``, ``80``, ``410``, ``240``, arcade.color.GREEN ,``0``)``arcade.draw_parabola_filled(``125``, ``80``, ``380``, ``220``, arcade.color.SKY_BLUE ,``0``)``arcade.draw_parabola_filled(``150``, ``80``, ``350``, ``200``, arcade.color.VIOLET ,``0``)``arcade.draw_parabola_filled(``175``, ``80``, ``325``, ``180``, arcade.color.INDIGO ,``0``)`` ` `# finish drawing``arcade.finish_render()`` ` `# to display everything``arcade.run()`

Output:

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