94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
#include <gint/display.h>
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#include <gint/keyboard.h>
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#include "engine.h"
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#define CELL_X(x) (-2 + 10 * (x))
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#define CELL_Y(y) (-3 + 10 * (y))
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//---
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// Animations
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//---
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void engine_tick(struct game *game, int dt)
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{
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game->time += dt;
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/* Update the animations for every player */
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for(int p = 0; game->players[p]; p++)
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{
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struct player *player = game->players[p];
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player->anim.duration -= dt;
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if(player->anim.duration > 0) continue;
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/* Call the animation function to generate the next frame */
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player->idle = !player->anim.function(&player->anim, 0);
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}
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}
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//---
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// Rendering
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//---
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static void engine_draw_player(struct player const *player)
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{
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dframe(CELL_X(player->x) - 1 + player->anim.dx,
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CELL_Y(player->y) - 5 + player->anim.dy,
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player->anim.img);
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}
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void engine_draw(struct game const *game)
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{
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dclear(C_WHITE);
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dimage(0, 0, game->map->img);
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for(int p = 0; game->players[p]; p++)
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{
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engine_draw_player(game->players[p]);
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}
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}
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//---
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// Physics
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//---
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/* Check whether a cell of the map is walkable */
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static int map_walkable(struct map const *map, int x, int y)
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{
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int tile = map->tiles[y * map->w + x];
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return (tile != TILE_WALL);
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}
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int engine_move(struct game *game, struct player *player, int dir)
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{
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int dx = (dir == DIR_RIGHT) - (dir == DIR_LEFT);
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int dy = (dir == DIR_DOWN) - (dir == DIR_UP);
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int olddir = player->dir;
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/* Don't move players that are already moving */
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if(!player->idle) return 0;
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/* Update the direction */
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player->dir = dir;
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player->anim.dir = dir;
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/* Only move the player if the destination is walkable */
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if(!map_walkable(game->map, player->x + dx, player->y + dy))
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{
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/* If not, set the new idle animation */
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if(dir != olddir)
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{
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player->idle = !anim_player_idle(&player->anim,1);
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}
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return 0;
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}
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player->x += dx;
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player->y += dy;
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/* Set the walking animation */
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player->idle = !anim_player_walking(&player->anim, 1);
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return 1;
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}
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