174 lines
3.2 KiB
C
174 lines
3.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <unistd.h>
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#ifdef WIN32
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#include <windows.h>
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#include <conio.h>
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#endif
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#define WIDTH 96
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#define HEIGHT 48
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#define FPS 30.f
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#define GRAVITY 2.0f
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#define DECELERATION 0.65f
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#define MARGIN 0.05f
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typedef enum PIXEL{
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MPTY,
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FULL
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} PIXEL;
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static PIXEL display[WIDTH*HEIGHT];
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static char pixels[4] = " .'O";
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typedef struct v2{
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float x;
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float y;
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} v2;
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typedef struct ball{
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v2 center;
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float radius;
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} ball;
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void clear(){
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#ifdef WIN32
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system("cls");
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#else
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system("clear");
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#endif
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}
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void move(int x, int y){
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#ifdef _WIN32
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COORD coord = {.X = x, .Y = y};
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SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
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#else
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printf("\033[%d;%dH", y, x);
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#endif
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}
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void hide(int o){
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#ifndef WIN32
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if(o)
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printf("\e[?25h");
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else
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printf("\e[?251");
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#endif
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}
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void back(){
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move(0, 0);
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}
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void csleep(int milliseconds){
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#ifdef _WIN32
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Sleep(milliseconds);
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#else
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float fmilliseconds = milliseconds/1000;
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sleep(fmilliseconds);
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#endif
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}
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void clearDisplay(){
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for(int y = 0; y < HEIGHT; ++y){
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for(int x = 0; x < WIDTH; ++x){
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display[x + y*WIDTH] = MPTY;
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}
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}
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}
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v2 initV2(float x, float y){
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v2 newV2;
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newV2.x = x;
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newV2.y = y;
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return newV2;
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}
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ball initBall(float x, float y, float radius){
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ball newBall;
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newBall.center = initV2(x, y);
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newBall.radius = radius;
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return newBall;
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}
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void drawBall(ball b){
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clearDisplay();
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v2 min = initV2(floor(b.center.x-b.radius), floor(b.center.y-b.radius));
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v2 max = initV2(ceil(b.center.x+b.radius), ceil(b.center.y+b.radius));
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for(int y = min.y; y < max.y; ++y){
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for(int x = min.x; x < max.x; ++x){
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float px = b.center.x - x - 0.5f, py = b.center.y - y - 0.5f;
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if((px*px + py*py) <= b.radius*b.radius){
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if(x >= 0 && x <= WIDTH && y >= 0 && y <= HEIGHT){
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display[x + y*WIDTH] = FULL;
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}
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}
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}
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}
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}
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void drawDisplay(){
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char row[WIDTH];
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for(int y = 0; y < HEIGHT/2; ++y){
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for(int x = 0; x < WIDTH; ++x){
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PIXEL t = display[x + (2*y+0)*WIDTH];
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PIXEL b = display[x + (2*y+1)*WIDTH];
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row[x] = (pixels[b + t*2]);
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}
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fwrite(row, sizeof(char), WIDTH, stdout);
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putchar('\n');
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}
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}
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int main(){
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clear();
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clearDisplay();
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back();
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hide(1);
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ball b = initBall(10, 10, 8);
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v2 vel = initV2(3, 0.1);
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while(vel.y != 0 || vel.x != 0){
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if(vel.x < MARGIN && vel.x > -MARGIN)
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vel.x = 0;
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if(vel.y < MARGIN && vel.y > -MARGIN)
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vel.y = 0;
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vel.y += (GRAVITY/FPS)*(b.center.y+b.radius-HEIGHT < 0);
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b.center.x += vel.x;
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b.center.y += vel.y;
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if(b.center.x+b.radius > WIDTH || b.center.x+b.radius+MARGIN > WIDTH){
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b.center.x = WIDTH - b.radius;
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vel.x *= -DECELERATION;;
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}
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if(b.center.x-b.radius < 0 || b.center.x-b.radius-MARGIN < 0){
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b.center.x = b.radius;
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vel.x *= -DECELERATION;
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}
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if(b.center.y+b.radius > HEIGHT || b.center.y+b.radius+MARGIN > HEIGHT){
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b.center.y = HEIGHT - b.radius;
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vel.y *= -DECELERATION;
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vel.x *= 1.5*DECELERATION;
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}
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back();
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drawBall(b);
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drawDisplay();
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csleep(1000/FPS);
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}
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return 0;
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}
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