... variables, what should I do to draw a line between the two ... I calculate the values for DRAW?

I thought ... simple matter of subtracting x1 and y1 from x2 and y2 but sometimes it ... error.

PLOT x1,y1
DRAW ????.????

I've ...

... br />
Added:

DRAW x1,y1 TO x2,y2[,angle] - draws a line from ... file commands
SAVE to a non-existant directory ... COPY didn't send to the current package properly< ... /> ERASEing package files tended to erase the entire package... ...

... />
GRAPHIC ORIGIN x1,y1 TO x2,y2 - as for windows, sets ... /> WINDOW ORIGIN x1,y1 TO x2,y2 - allows you to specify a coordinate ...
CONST optimisations to commonly used string operations ... TO 1,1

Now all graphics commands (PLOT, DRAW ...

...
Added:

ORIGIN x1,y1 TO x2,y2 can now be used as ... use in a PRINT/PLOT/DRAW etc statement as you would ... destination
2: Add source to destination
3: Subtract ... such as PLOT, DRAW etc. Clipping only applies to the current drawing ...

... but clipped) they're attached to. Sprites are therefore "floating ... n PATH x,y TO x1,y1 TO x2,y2 ... TO xn,yn to define a path ... [quote]
STOS had commands to make sprites move or animate ... rectangles that you can PLOT/DRAW/CIRCLE etc to.

...

... )
Programmer's Guide to the Apple-II (©1978 Computer ... , but they're easy enough to find.)

Functions ... HPLOT absolute X pixel coordinate to DRAW relative X pixel coord
to DRAW relative Y pixel coord

... USING$ function - identical to PRINT USING() but returns a ... ,h as well as x1,y1 TO x2,y2
MATCH(regexp$,text ... increase!
Slight optimisations to other primitive drawing commands - ... keybuffer inappropriately, causing INKEY$ to lose keys
...

... (UNDIM), filtering arrays to remove or isolate specific patterns ... parameters: string to search, text to replace, text to replace with ... coordinates (as opposed to just two) - x1,y1 TO x2,y2 TO x3,y3 which ... appended an extra "$" to the varname, rendering it ...

... x1,y1 to x2,y2
; On entry B = y1, C = x1, D = y2, E = x2 ... (DBLDELTAX),HL ; deltax = x2 - x1
LD A,(DBLDELTAX+1 ... ),HL ; deltax = abs(x2 - x1)
DBLGENDY LD A,(DBLEND ... (DBLDELTAY),HL ; deltay = y2 - y1
LD A,(DBLDELTAY+1 ...

... trying to say is:

For two vectors (x1,y1) and (x2,y2):
Dot product = (x1*x2) + (y1*y2)

For two vectors (x1,y1, ... z1,etc...) and (x2,y2,z1,etc...):
Dot product = (x1*x2) + (y1*y2) + ...

... trying to say is:

For two vectors (x1,y1) and (x2,y2):
Dot product = (x1*x2) + (y1*y2)

For two vectors (x1,y1, ... z1,etc...) and (x2,y2,z1,etc...):
Dot product = (x1*x2) + (y1*y2) + ...

... x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))
120 IF x2=x1 THEN LET phi=PI /2:\
GO TO ... 140
130 LET phi=ATN ABS ((y2-y1)/(x2-x1))
... /> 310 PLOT x1,y1:\
DRAW s1x,s1y:\
PLOT x2,y2:\
DRAW

Dunny May 2006 Sinclair Basic

... : GO TO 122
121 LET phi12=ATN ABS ((y2-y1)/(x2-x1))
122 ... IF x3=x1 THEN LET phi13=PI/2: GO TO ... PLOT x1,y1: DRAW s1x,s1y: PLOT x2,y2: DRAW s2x,s2y: PLOT x3,y3: DRAW s3x ...

... : GO TO 122
121 LET phi12=ATN ABS ((y2-y1)/(x2-x1))
122 ... IF x3=x1 THEN LET phi13=PI/2: GO TO ... PLOT x1,y1: DRAW s1x,s1y: PLOT x2,y2: DRAW s2x,s2y: PLOT x3,y3: DRAW s3x ...

... *m2/((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))
120 IF x2=x1 THEN LET phi=PI/2: GO TO ... x1,y1: DRAW s1x,s1y: PLOT x2,y2: DRAW s2x,s2y
320 LET x1=x1+s1x: LET x2=x2 ... +s2x
330 LET y1=

Willy March 2010 New game ideas

... a=1 TO np: LET x1=p(a,1): LET y1=p(a ... ,2): FOR b=a TO ... np: LET x2=p ... (b,1): LET y2=p(b,2): PLOT x1,y1: DRAW TO x2,y2 ... : NEXT b: NEXT a
70 WAIT SCREEN: GO TO 20 ...

The C equivalent, using Z88DK, would be this:

[code]/* zcc +zx -vn -lndos plots.c -o plots -create-app */

#include

int main()
{
register unsigned char i;

for(i=1; i

... program that could be used to create UDGs:

x1 is equal to x and y1 to y
... square, otherwise clear the coordinates x1,y1 (to delete the trail).
... x1 preview next to the grid) but the routine would sometimes fail to draw ...

... in development forum, I decided to ask this in here)
x1,y1, and target position is x2,y2.

... I'm using some trigonometric calculation to find ... the course, and decide to move the car to ...

... Master by A Lycett adapted to SpecBAS
5 WINDOW ORIGIN ... 0,0,0 TO 256,192: SCALE SCRw/256 ...

... DRAW-LINE
; ******************************************************************************
;
; Draw ... to 191.
; DE = (x1,y1) - x1 range is 0 to 255, y1 range is 0 to ... salta se x2>=x1
... salta se y2>=y1
...

... DRAW-LINE
; ******************************************************************************
;
; Draw ... to 191.
; DE = (x1,y1) - x1 range is 0 to 255, y1 range is 0 to ... salta se x2>=x1
... salta se y2>=y1
...

... I decide to use splib2 to create my image parser to draw lines, circles ... graphics routines will be called to draw lines, etc, instead of ... 1: // line draw
// draw(int x1, int y1, int x2, int y2);
draw(params[0 ...

... /> Standard BASIC's "LINE (x1, y1) - (x2, y2)" translates to this couple of lines in ... :

[code]PLOT x1, y1
DRAW x2 - x1, y2 - y1[/code]

So you ... 't working would help us to help you :)

EDIT ...

... />
The key is how to draw shapes' boundaries: for non horizontal ... /> 40 LET x1=128+30*COS i:
LET y1=88+30 ... LET x1=128-82:
LET y1=88-82:
LET x2=128 ... +82:
LET y2=88 ...

... I will forward this information to the author of the ... br /> 50 DRAW INK c; x2 - x1, y2 - y1
60 LET x1 = x2: LET y1 = y2: REM Next ... sentences, which might lead to serious ambiguity if no END ... compatible BASIC, better stick to the ROM BASIC and use ...

... =k1 TO plots:
READ x1,y1,draws: PLOT FN x(x1),FN y(y1 ... ):
FOR d=k1 TO draws:
READ x2,y2: DRAW ... FN x(x2),-y2 ...