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Notice the extension .bmp is not given. The interpreter will add this extension automatically, do not include it, if you do you will get an error. GetXY Var1,Var2 Var2=y. Reads the current pen position on the screen and sets Var1=x and
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GotoXY ExprN1,ExprN2 Sets the pen position to a point on the screen ExprN1=x, ExprN2=y. SetColor ExprN1{,ExprN2} Sets the pen color to ExprN1 and the background color to ExprN2. GetColor Var1,Var2 Sets Var1= pen color Var2 = background color.
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ReadPixel ExprN1,ExprN2,Var Reads the pixel color at the position x=ExprN1, y=ExprN2 and sets Var to that value (See color codes in Sec. B.7.6). (Also see FloodFill command below). SetPixel ExprN1,ExprN2,ExprN3 Sets the color of the pixel at x=ExprN1, y=ExprN2 to the color ExprN3. (see color codes Sec. B.7.6) (Also see the FloodFill command below). LineWidth ExprN Sets the pen width for drawing lines and other shapes.
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GetLineWidth Var Sets Var to the current pen width for drawing lines and other shapes. LineTo ExprN1,ExprN2{,ExprN3{,ExprN4}} Draws a line from the current pen position to ExprN1, ExprN2. If ExprN3 is given then the pen width will be temporarily set to ExprN3. If ExprN4 is given then pen color will be temporarily set to ExprN4. ExprN3 and ExprN4 will only affect the line drawn, not any subsequent lines or other drawings. If you desire to specify ExprN4 you must also specify ExprN3. Line ExprN1,ExprN2,ExprN3,ExprN4{,ExprN5{,ExprN6}} Draws a line from the point ExprN1,ExprN2 to the point ExprN3,ExprN4. If ExprN5 is given then the pen width will be temporarily set to ExprN5. If ExprN6 is given then pen color will be temporarily set to ExprN6. ExprN5 and ExprN6 will only affect the line drawn, not any subsequent lines or other drawings. If you desire to specify ExprN6 you must also specify ExprN5, but if ExprN5 is less than 1 it will be ignored. Also if ExprN6 is less than 0 it will be ignored. If you do not specify a width and color the current default width and color will be used. Rectangle ExprN1,ExprN2,ExprN3,ExprN4{,ExprN5,ExprN6} Draws a rectangle de ned by x1=ExprN1, y1=ExprN2 and x2=ExprN3, y2=ExprN4 lled with
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COMMANDS, FUNCTIONS, AND OTHER DETAILS
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color given by ExprN6 and bordered with color given by ExprN5. If ExprN6 is not given then the default background color is used. If ExprN5 is not given then the default pen color is used but if you want to specify ExprN6 you must also give ExprN5. x1, y1 are coordinates on the screen of the top-left corner, and x2, y2 are of the bottom right corner of the rectangle. ERectangle ExprN1,ExprN2,ExprN3,ExprN4{,ExprN5{,ExprN6}} The above command (Rectangle) will always draw the rectangle and ll it with the color speci ed or the default background color. This means the inside of the rectangle will be erased if there happens to be any previous drawings there. This command only draws the perimeter of the rectangle and does not ll the inside. Thus, any previous drawings inside the area of the rectangle will still be visible. The rectangle is de ned by X1=ExprN1,ExprN2=Y1 and X2=ExprN3,Y2=ExprN4. If ExprN5 is given then the pen width will be temporarily set to ExprN5. If ExprN6 is given then pen color will be temporarily set to ExprN6. ExprN5 and ExprN6 will only affect the current drawing, not any subsequent drawings. If you desire to specify ExprN6 you must also specify ExprN5, but if ExprN5 is less than 1 it will be ignored. Also, if ExprN6 is less than 0 it will be ignored. For an example see the example given in the Pie command. Circle ExprN1,ExprN2,ExprN3,ExprN4{,ExprN5,ExprN6} Draws a circle/ ellipse inside a rectangle de ned as above. If the rectangle is a square then it is a circle, otherwise it is an ellipse. Arc ExprN1,ExprN2,ExprN3,ExprN4{,ExprN5{,ExprN6{,ExprN7{,ExprN8}}}} The above command (Circle) will always draw the circle/ellipse and ll it with the color speci ed or the default background color. This means the inside of the circle/ellipse will be erased if there happens to be any previous drawings there. This command only draws the perimeter of the circle/ellipse and does not ll the inside. Thus, any previous drawings inside the area of the circle/ellipse will still be visible. Additionally, this command allows you to draw a fraction of the arc of the circle or ellipse. The circle/ellipse is de ned by the bounding rectangle de ned by X1=ExprN1, Y1=ExprN2 and X2=ExprN3, Y2=ExprN4. If ExprN7 is given then the pen width will be temporarily set to ExprN7. If ExprN8 is given then pen color will be temporarily set to ExprN8. ExprN5 and ExprN6 are angles in radians that specify the start point of the arc and the length of the arc. The angles are de ned counter-clock-wise from the right hand horizontal position (i.e. positive x-axis). If ExprN6 is zero or an even multiple of Pi() (i.e. 0,360,720... degrees) the entire circle/ellipse will be drawn. ExprN5 and 6 default to 0 if not given. ExprN5 de nes the angle (in radians) from the positive x-axis (counterclockwise) at which to start drawing the arc. ExprN6 de nes the length of the arc (angle inside the arc in radians). To specify angles in degrees use the function DtoR(). ExprN7 and ExprN8 will only affect the current drawing, not any subsequent drawings. If you desire to specify ExprN8 you must also specify ExprN5,6,7, but if ExprN7 is less than 1 it will be ignored. Also if ExprN8 is less than 0 it will be ignored. For an example see the example given in the Pie command.
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