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Revision as of 06:35, 20 September 2009 by
The DRAW graphics statement uses a string value to draw lines on the screen.
- Syntax: DRAW draw_string$
- The draw string can be a draw value in quotation marks or a STRING variable using DRAW function letters.
- DRAW starting coordinates can be set using PSET, PRESET or other graphic objects.
- Other graphic objects can be located at or relative to the last DRAW position.
- Draw strings use letters followed by the number of pixels to move, an angle, coordinate or a color value.
- Draw strings are flexible with spacing. No spacing is required! DRAW will look for a number value when needed.
- DRAW statements are not Case sensitive. Use upper or lower case.
- "C n" designates the color n to be used in the draw statement string following its use.
- "B" before a line move designates that the line move will be hidden(Blind).
- "N" before a line move designates that the line will return to the starting position(Null).
- "M x, y" can move to another coordinate area of the screen. When a + or - sign is used before a coordinate, it is a relative coordinate move similar to using the STEP graphics keyword.
- "S n" changes the move size of the lines. Default is 4(1 pixel) minimum. "S8" would double the pixel line moves.
- DRAW uses certain letter designations to create line moves on the SCREEN. Each move is followed by the number of pixels:
- "U n" makes a line UP n pixels.
- "D n" makes a line DOWN n pixels.
- "L n" makes a line LEFT n pixels.
- "R n" makes a line RIGHT n pixels.
- "E n" makes a diagonal / line going UP and RIGHT n pixels.
- "F n" makes a diagonal \ line going DOWN and RIGHT n pixels.
- "G n" makes a diagonal / LINE going DOWN and LEFT n pixels.
- "H n" makes a diagonal \ LINE going UP and LEFT n pixels
- Angles are used to rotate the draw moves following their use. U could become a down move.
- "A n" can use values of 1 to 3 to rotate up to n 90 degree angles.
- TA n" can use any n angle from -360 to 0 to 360 to rotate a DRAW (Turn Angle). "TA0" resets to normal.
- When VARPTR$ is used to create TA angle values use an = sign. "TA=" angle$
Example: Placing an octagon shape DRAW across the the screen using PSET.
- SCREEN 12
- FOR i% = 1 TO 11
- NEXT i%