fillpoly

fillpoly是一個函式，用 法: void far fillpoly(int numpoints, int far *polypoints);

基本介紹

• 中文名：fillpoly
• 名詞類型：函式
• 名詞領域：編程
• 功能： 畫並填充一個多邊形

函式介紹

fillpoly是一個函式，用 法: void far fillpoly(int numpoints, int far *polypoints);

用 法: void far fillpoly(int numpoints, int far *polypoints);

int numpoints：多邊形邊數

int far *polypoints：存儲各頂點坐標的數組，每兩個一組表示一個頂點的X，Y坐標

程式範例

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int main(void)

{

/* request auto detection */

int gdriver = DETECT, gmode, errorcode;

int i, maxx, maxy;

/* our polygon array */

int poly[8];

/* initialize graphics, local variables */

initgraph(&gdriver, &gmode, "");

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk)

/* an error occurred */

{

printf("Graphics error: %s\n",

grapherrormsg(errorcode));

printf("Press any key to halt:");

getch();

exit(1);

/* terminate with an error code */

}

maxx = getmaxx();

maxy = getmaxy();

poly[0] = 20; /* 1st vertext */

poly[1] = maxy / 2;

poly[2] = maxx - 20; /* 2nd */

poly[3] = 20;

poly[4] = maxx - 50; /* 3rd */

poly[5] = maxy - 20;

/*

4th vertex. fillpoly automatically

closes the polygon.

*/

poly[6] = maxx / 2;

poly[7] = maxy / 2;

/* loop through the fill patterns */

for (i=EMPTY_FILL; i<USER_FILL; i++)

{

/* set fill pattern */

setfillstyle(i, getmaxcolor());

/* draw a filled polygon */

fillpoly(4, poly);

getch();

}

/* clean up */

closegraph();

return 0;

}