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// Pong add-in by davidovski
// Copyright (C) 2021 davidovski
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <gint/gint.h>
#include <gint/display.h>
#include <gint/keyboard.h>
#include <gint/keycodes.h>
#include <gint/clock.h>
#include <math.h>
int s1 = 0;
int s2 = 0;
float bx = 64;
float by = 32;
int bs = 2;
float vx = 0;
float vy = 0;
float s = 1;
int p1 = 24;
int p2 = 24;
int h = 16;
int w = 2;
int main(void)
{
gint_setrestart(1);
int tick = 1;
bool game = true;
while (game) {
dclear(C_WHITE);
drect(1, p1, 1 + w, p1 + h, C_BLACK);
drect(125, p2, 125 + w, p2 + h, C_BLACK);
drect(bx-1, by-1, bx+1, by+1, C_BLACK);
dupdate();
pollevent();
if (keydown(KEY_EXIT))
gint_osmenu();
if (keydown(KEY_1) && p1 + h < 64)
p1 += 1;
if (keydown(KEY_4) && p1 > 0)
p1 -= 1;
if (keydown(KEY_5) && bs == 1) {
bs = 0;
vy = 0;
vx = s;
}
if (keydown(KEY_SUB) && p2 + h < 64)
p2 += 1;
if (keydown(KEY_DIV) && p2 > 0)
p2 -= 1;
if (keydown(KEY_MUL) && bs == 2) {
bs = 0;
vy = 0;
vx = -s;
}
if (bs == 1) { //player 1 serve
bx = 5;
by = p1 + (h/2);
} else if (bs == 2) { // player 2 serve
bx = 123;
by = p2 + (h/2);
} else {
if (by < 1) vy *= -1;
if (by > 63) vy *= -1;
if (bx < 0) bs = 2;
if (bx > 128) bs = 1;
// collided with player 1
if (by > p1 && by < p1+h+2 && bx <= 5) {
int dy = p1+(h/2) - by;
vx = fabs(vx);
vy += dy * 0.1;
}
if (by > p2 && by < p2+h+2 && bx >= 123) {
int dy = p2+(h/2) - by;
vx = -fabs(vx);
vy += dy * -0.1;
}
bx += vx;
by += vy;
}
tick++;
sleep_us(20*1000);
}
return 0;
}
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