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Ch. 2 - Appendix

Appendix

Other Drawing methods:

Ellipse

Draws an ellipse (oval) on the screen. It is as if it draws the rectangle and then makes the curved Ellipse shape inside of it.

Form: pygame.draw.ellipse(screen, colour, vertices, width)

Variables:
Screen - the created screen where we are drawing the ellipse Color - RGB colour, can be predefined like RED in the example or defined in the statement as (red, green, blue) e.g. (100, 200, 155) Vertices - (x1, y1, w, h) where x1, y1 are the coordinates of the top left and w, h are the width and height of the rectangle in which the ellipse would fit within. Width - optional, does not have to be there, will fill in the ellipse if it is not. If it is, then width represents the thickness of the outside of the ellipse.

Examples:
pygame.draw.ellipse(screen, (255, 0, 0), (120,330, 200, 500)) pygame.draw.ellipse(screen, RED, (0,0, 200,500), 2)

Line

Draws a line on the screen

Form: pygame.draw.line(screen, colour, startCoordinates, endCoordinates, width)

Variables:
Screen - the created screen where we are drawing the line
Colour - RGB colour, can be predefined like RED in the example or defined in the statement as (red, green, blue) e.g. (100, 200, 155)
StartCoordinates - (x1, y1), where x1, y1 are the coordinates of the beginning of the line
EndCoordinates - (x2, y2), where x2, y2 are the coordinates of the end of the line
Width - optional, does not have to be there. If it is, then width represents the thickness of the line.

Example:
pygame.draw.line(screen, RED, (100, 200), (50, 350), 10)

Circle

Draws a circle on the screen

Form: pygame.draw.circle(screen, colour, pos, radius, width)

Variables:
Screen - the created screen where we are drawing the circle Colour - RGB colour, can be predefined like RED in the example or defined in the statement as (red, green, blue) e.g. (100, 200, 155) Pos- (x1, y1) where x1, y1 are the coordinates of the center of the circle Radius - the radius of the circle Width - optional, does not have to be there, will fill in the circle if it is not. If it is, then width represents the thickness of the outside of the circle

Examples:
pygame.draw.circle(screen, RED, (0, 0), 100) pygame.draw.circle(screen, RED, (0,0),100, 30)

Arc

Draws an arc on the screen

Form: pygame.draw.arc(screen, colour, vertices, startAngle, endAngle, width)

Variables:
Screen - the created screen where we are drawing the arc Colour - RGB colour, can be predefined like RED in the example or defined in the statement as (red, green, blue) e.g. (100, 200, 155) Vertices - (x1, y1, w, h) where x1, y1 are the coordinates of the top left and w,h are the height and width of the rectangle in which the arc would fit within. StartAngle - the angle (in radians) at which the arc would start (on the right is 0) EndAngle - the angle (in radians) at which the arc ends Width - optional, thickness to draw the outer edge

Examples:
pygame.draw.arc(screen,(100, 200, 155), (50, 50, 200, 200), 0, math.pi) pygame.draw.arc(screen,RED, (0, 0, 300, 250), math.pi / 2 , 3*math.pi/2) pygame.draw.arc(screen, BLUE, (100, 100, 200, 200), math.radians(30), math.radians(150))

Note:
  • To use math.pi, add import math at the top of your program
  • Use math.radians to convert from degrees to radians.

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