Some Pygame Functions

Draw Circle

• pygame.draw.circle(surface, color, center xy, radius)
• surface is the name of the surface on which you want to draw your figure
• Recall that this was defined by the command: window = pygame.display.set_mode((width,height))
• Where width and height are the user defined dimensions of the window you want to draw in (preferrably these dimensions are stored as variables)
• color is the color (R,G,B) you want the image to be
• center xy is where you want the center of the circle (as (x,y) coordinates) to be
• Recall that the location (x,y) is x = number of pixels from the left and y = number of pixels from the top
• A couple of examples of locations (x,y) on a screen with dimensions (width,height):
  • (0, 0) is the top left corner of the drawing surface
  • (width, height) is the bottom right corner of the drawing surface
  • (0, height) is the bottom left corner of the drawing surface
  • (width, 0) is the top right corner of the drawing surface
  • (width/2, height/2) is the center of the drawing surface
• radius is the radius of the circle

Draw Rectangle

• pygame.draw.rect(surface,color,(x,y,w,h))
• surface and color are the same as before!
• (x,y,w,h)
• x is the x coordinate of the top left corner of the rectangle
• y is the y coordinate of the top left corner of the rectangle
• w is the width of the rectangle
• h is the height of the rectangle

Draw Ellipse

• pygame.draw.ellipse(surface,color,(x,y,w,h))
• The arguments are the same as for a rectangle!
• What this function actually does is draw an "invisible" rectangle according to (x,y,w,h) , but what you see is the ellipse that fits inside that rectangle
• (x,y,w,h)
• x is the x coordinate of the top left corner of the rectangle that holds the ellipse
• y is the y coordinate of the top left corner of the rectangle that holds the ellipse
• w is the width of the ellipse
• h is the height of the ellipse

Draw Line

• pygame.draw.line(surface,color,start xy, end xy, thickness)
• surface and color are the same as before!
• start xy are the (x,y) coordinates where you want the line to start
• end xy are the (x,y) coordinates where you want the line to end
• thickness is how thick (measured in number of pixels) you want the line to be