c:graphics.h:linerel
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c:graphics.h:linerel [2015/05/06 23:06] |
c:graphics.h:linerel [2024/02/16 01:05] (current) |
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| + | ===== linerel ===== | ||
| + | |||
| + | |||
| + | ====Syntax of linerel ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void linerel(int dx, int dy); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of linerel ==== | ||
| + | <code c> | ||
| + | linerel draws a line from the CP (current position) to a point that is a | ||
| + | relative distance (dx,dy) from the CP. The CP is advanced by (dx,dy). | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of linerel ==== | ||
| + | <code c> | ||
| + | /* linerel example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | char msg[80]; | ||
| + | |||
| + | /* initialize graphics and local variables */ | ||
| + | initgraph(&gdriver, &gmode, ""); | ||
| + | |||
| + | /* read result of initialization */ | ||
| + | errorcode = graphresult(); | ||
| + | if (errorcode != grOk) { | ||
| + | printf("Graphics error: %s\n", grapherrormsg(errorcode)); | ||
| + | printf("Press any key to halt:"); | ||
| + | |||
| + | getch(); | ||
| + | exit(1); | ||
| + | } | ||
| + | |||
| + | /* move the CP to location (20,30) */ | ||
| + | moveto(20,30); | ||
| + | |||
| + | /* create and output a message at (20,30) */ | ||
| + | sprintf(msg, " (%d, %d)", getx(), gety()); | ||
| + | outtextxy(20,30, msg); | ||
| + | |||
| + | /* draw line to a point a relative distance away from current CP */ | ||
| + | linerel(100, 100); | ||
| + | |||
| + | /* create and output a message at CP */ | ||
| + | sprintf(msg, " (%d, %d)", getx(), gety()); | ||
| + | outtext(msg); | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | |||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[getlinesettings]] | ||
| + | [[line]] | ||
| + | [[lineto]] | ||
| + | [[setcolor]] | ||
| + | [[setlinestyle]] | ||
| + | [[setwritemode]] | ||
| + | |||
| + | |||
| + | ===== output of linerel example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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