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/*
* Copyright (C) 2021 P. J. McDermott
*
* This file is part of Dodge Balls
*
* Dodge Balls 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.
*
* Dodge Balls 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 Dodge Balls. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <stdlib.h>
#include "ball.h"
#include "collision.h"
#include "tileset.h"
#include "output.h"
struct db_ball {
int cx;
int cy;
double x;
double y;
int r;
double a;
int d;
int sr;
double s;
struct db_tileset *tilesets;
int gid;
struct db_ball *next;
};
struct db_ball *
db_ball_new(int x, int y, int r, int a, int d, int sr, double s,
struct db_tileset *tilesets, int gid, struct db_ball *prev)
{
struct db_ball *ball;
ball = calloc(1, sizeof(*ball));
if (ball == NULL) {
db_err("Failed to allocate memory");
return NULL;
}
db_dbg("Ball at (%d,%d)", x, y);
if (sr == 0) {
ball->x = x;
ball->y = y;
} else {
ball->cx = x;
ball->cy = y;
ball->x = x + cos(a * (M_PI / 180)) * sr;
ball->y = y - sin(a * (M_PI / 180)) * sr;
}
ball->r = r;
ball->a = a;
ball->d = d;
ball->sr = sr;
ball->s = s;
ball->tilesets = tilesets;
ball->gid = gid;
if (prev != NULL) {
prev->next = ball;
}
return ball;
}
void
db_balls_collisions(struct db_ball *ball)
{
struct db_ball *other;
int col_x;
int col_y;
for (; other != NULL; other = other->next) {
if (db_col_pt_cir_cir(ball->x, ball->y, ball->r,
other->x, other->y, other->r,
&col_x, &col_y)) {
/* TODO: Reverse direction */
}
}
if (ball->next != NULL) {
db_balls_collisions(ball->next);
}
}
int
db_balls_player_collisions(struct db_ball *ball,
int player_x, int player_y, int player_r)
{
if (db_col_cir_cir(ball->x, ball->y, ball->r,
player_x, player_y, player_r)) {
return 1;
}
if (ball->next != NULL) {
return db_balls_player_collisions(ball->next,
player_x, player_y, player_r);
} else {
return 0;
}
}
void
db_balls_render(struct db_ball *ball, SDL_Renderer *renderer)
{
SDL_Rect dstrect;
dstrect.x = ball->x - ball->r;
dstrect.y = ball->y - ball->r;
dstrect.w = ball->r * 2;
dstrect.h = ball->r * 2;
db_dbg("Rendering ball (%dx%d) at (%d,%d)",
dstrect.w, dstrect.h, dstrect.x, dstrect.y);
db_tile_render(ball->tilesets, renderer, ball->gid, &dstrect);
if (ball->next != NULL) {
db_balls_render(ball->next, renderer);
}
}
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