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Power Programmierung
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Power-Programmierung CD 2 (Tewi)(1994).iso
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c
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compiler
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micro_c
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roboface.c
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C/C++ Source or Header
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1992-02-23
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2KB
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109 lines
/*
* This function draws a very crude "robot" face on the PC video
* screen, using block characters on an 80x25 matrix. In addition
* to entertaining children, it shows some simple techniques for
* drawing lines, boxes and circles, which could be applied to
* higher resolution graphics modes.
*/
#include \mc\stdio.h /* Standard I/O definitions */
#include \mc\video.h /* Video I/O definitions */
#define PCHR 0xDB
/*
* Main program, draw the face
*/
main()
{
int i;
vopen();
vcursor_off();
box(1, 0, 77, 24);
for(i=1; i < 5; ++i) {
circle(17, 8, i);
circle(60, 8, i); }
circle(17, 8, 6);
circle(60, 8, 6);
line(38, 9, 42, 13);
line(38, 9, 34, 13);
line(35, 13, 41, 13);
box(24, 18, 53, 21);
vgetc();
vcursor_line();
vclscr();
}
/*
* Draw a line from point (x1, y1) to (x2, y2)
*/
line(x1, y1, x2, y2)
int x1, y1, x2, y2;
{
int i, w, h;
/* If 'X' is greater, increment through 'X' coordinate */
if((w = abs(x1 - x2)) >= (h = abs(y1 - y2))) {
if(x1 > x2) {
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i; }
h = y2 - y1;
for(i=0; i < w; ++i) {
vgotoxy(x1+i, y1+((i*h) / w));
vputc(PCHR); } }
/* If 'Y' is greater, increment through 'Y' coordinate */
else {
if(y1 > y2) {
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i; }
w = x2 - x1;
for(i=0; i < h; ++i) {
vgotoxy(x1+((i*w)/h), y1+i);
vputc(PCHR); } }
vgotoxy(x2, y2);
vputc(PCHR);
}
/*
* Draw a box with opposite corners (x1, y1) to (x2, y2)
*/
box(x1, y1, x2, y2)
int x1, y1, x2, y2;
{
line(x1, y1, x2, y1);
line(x1, y1, x1, y2);
line(x2, y1, x2, y2);
line(x1, y2, x2, y2);
}
/*
* Draw a circle about point (x, y) of radus (r)
*/
circle(x, y, r)
int x, y, r;
{
int i, j, k, rs, lj;
rs = (lj = r)*r;
for(i=0; i <= r; ++i) {
j = k = sqrt(rs - (i*i));
do {
vgotoxy(x+i, y+j); vputc(PCHR);
vgotoxy(x+i, y-j); vputc(PCHR);
vgotoxy(x-i, y+j); vputc(PCHR);
vgotoxy(x-i, y-j); vputc(PCHR); }
while(++j < lj);
lj = k; }
}