Collab_RPG/src/player.c

#include "player.h"

#include "config.h"
#include "dialogs.h"
#include "game.h"
#include "map.h"
#include "npc.h"

#include <gint/display.h>

extern bopti_image_t player_male_img;
extern bopti_image_t player_female_img;
extern bopti_image_t npc_male;
extern bopti_image_t npc_female;
extern bopti_image_t npc_milkman;
extern bopti_image_t npc_police;
extern bopti_image_t SGN_Icon_img;
extern bopti_image_t INFO_Icon_img;

const Face faces[FACES] = {{"MALE", &npc_male},
                           {"FEMALE", &npc_female},
                           {"MILKMAN", &npc_milkman},
                           {"POLICE", &npc_police}};

const char one_px_mov[8] = {
    0,  -1, /* Up */
    0,  1,  /* Down */
    -1, 0,  /* Left */
    1,  0   /* Right */
};

/* TODO: Search for all hard tiles in the tileset. hard_tiles is a list of their
 * IDs */
/* The speed of the player on the diffrent tiles in the walkable layer. */
#define WALKABLE_TILE_MAX 4
const short int walkable_speed[WALKABLE_TILE_MAX] = {SPEED, 0, PXSIZE, PXSIZE};

/* How much damage the player takes on the diffrent tiles in the walkable
 * layer. */
const char damage_taken_walkable[WALKABLE_TILE_MAX] = {0, 0, 5, 0};

extern bopti_image_t demo_player_img;

extern NPC *npcRPG;
extern uint32_t nbNPC;

void player_draw(Game *game) {
    Player *player = &game->player;
    dimage(player->px - P_WIDTH / 2, player->py - P_HEIGHT / 2,
           player->is_male ? &player_male_img : &player_female_img);
}

void player_move(Game *game, Direction direction) {
    Player *player = &game->player;

    /* How this player movement will modify the player x and y. */
    char dx, dy;

    /* If the player will collide with a hard tile or if the will go outside of
     * the map. */

    if(player_collision(game, direction, P_CENTER)) {

        /* If the will collide with the center of the player. */
        dx = one_px_mov[direction * 2] * player->speed;
        dy = one_px_mov[direction * 2 + 1] * player->speed;

        player_fix_position(game, dx, dy);
    } else {
        if(player_collision(game, direction, P_RIGHTDOWN) ||
           player_collision(game, direction, P_LEFTUP)) {

            /* If the will collide with the edges of the player. */
            /* I fix his position so he won't be partially in the tile. */
            /* I invert dx and dy to fix the axis where he is not moving on. */
            /* Do not replace dx==0 with !dx or dy==0 with !dy, it won't work!
             */
            dx = one_px_mov[direction * 2] * player->speed;
            dy = one_px_mov[direction * 2 + 1] * player->speed;

            player_fix_position(game, dx == 0, dy == 0);
        }

        /* If he won't collide with the center, so I just move him normally */
        dx = one_px_mov[direction * 2] * player->speed;
        dy = one_px_mov[direction * 2 + 1] * player->speed;

        player->x += dx;
        player->y += dy;
    }

    player->wx = game->map_level->xmin * PXSIZE + player->x;
    player->wy = game->map_level->ymin * PXSIZE + player->y;
}

void player_action(Game *game) {
    register size_t i;
    /* already doing something (action IS NOT with an NPC) */
    if(game->player.isDoingAction)
        return;

    if(game->player.canDoSomething && !game->player.isInteractingWithNPC) {
        /* we can do something */
        /* we indicate that the player is occupied */
        game->player.isDoingAction = true;

        ExtraData *currentData =
            &game->map_level->extradata[game->player.whichAction];

        /* we use the correct image as per the class of the item */

        bopti_image_t *face;
        /* we use the correct image as per the class of the item */

        if(strcmp("INFO", currentData->type) == 0) {
            face = &INFO_Icon_img;
        } else if(strcmp("SGN", currentData->type) == 0) {
            face = &SGN_Icon_img;
        } else {
            /* It's a NPC */
            /* (Mibi88) TODO: Use string hash + strcmp if the hashes match for
             * fast string comparison. */
            face = NULL;
            for(i = 0; i < FACES; i++) {
                Face current_face = faces[i];
                if(!strcmp(current_face.name, currentData->face)) {
                    face = current_face.face;
                }
            }
            if(!face)
                face = &npc_male;
        }

        uint32_t dialogStart = currentData->dialogID;

        dialogs_initiate_sequence(game, face, dialogStart);

        /* when done we release the occupied status of the player */
        game->player.isDoingAction = false;
    } else if(game->player.canDoSomething &&
              game->player.isInteractingWithNPC) {
        /* we can do something (action IS with an NPC) */
        /* we indicate that the player is occupied */
        game->player.isDoingAction = true;

        NPC *currentNPC = &npcRPG[game->player.whichAction];

        /* we use the correct image as per the class of the item */

        ExtraData *currentData =
            &game->map_level->extradata[game->player.whichAction];
        bopti_image_t *face = &npc_male;
        /* It's a NPC */
        /* (Mibi88) TODO: Use string hash + strcmp if the hashes match for
         * fast string comparison. */
        face = NULL;
        for(i = 0; i < FACES; i++) {
            Face current_face = faces[i];
            if(!strcmp(current_face.name, currentNPC->face)) {
                face = current_face.face;
            }
            if(!face)
                face = &npc_male;
        }
        dtext(2, 64, C_BLACK, currentData->type);
        uint32_t dialogStart = currentNPC->dialogID;

        /* we set this NPC to paused to avoid changing its position while
         * talking (the rest of the NPCs pursue their action) */
        currentNPC->paused = true;

        dialogs_initiate_sequence(game, face, dialogStart);

        /* when done we release the occupied status of the player */
        game->player.isDoingAction = false;

        currentNPC->paused = false;
    }
}

bool player_collision(Game *game, Direction direction,
                      Checkpos nomov_axis_check) {

    Player *player = &game->player;

    /* Where is the tile where he will go to from his position. */
    char dx = one_px_mov[direction * 2];
    char dy = one_px_mov[direction * 2 + 1];

    if(!dx) {
        dx += nomov_axis_check;
    } else if(!dy) {
        dy += nomov_axis_check;
    }

    dx = dx * (P_WIDTH / 2 + 1);
    dy = dy * (P_HEIGHT / 2 + 1);

    /* The tile he will go to. */
    int player_tile_x = player->x + dx;
    int player_tile_y = player->y + dy;

    /* check where the player is expected to go on the next move */
    /* if outside the map, we check if there is a map on the other */
    /* side of the current map*/
    if(map_get_walkable(game, player_tile_x, player_tile_y) == MAP_OUTSIDE) {
        // we compute the expected world coordinates accordingly
        // while taking care of the scaling between fx and cg models (PXSIZE)
        int worldX = (player->wx + dx) / PXSIZE;
        int worldY = (player->wy + dy) / PXSIZE;
        Map *map = map_get_for_coordinates(game, worldX, worldY);
        if(map != NULL && map != game->map_level) {
            Map *backupmap = game->map_level;
            int backupx = player->x;
            int backupy = player->y;
            int backupwx = player->wx;
            int backupwy = player->wy;

            game->map_level = map;

            player->wx = worldX * PXSIZE;
            player->wy = worldY * PXSIZE;

            player->x = (worldX - map->xmin) * PXSIZE;
            player->y = (worldY - map->ymin) * PXSIZE;

            int on_walkable = map_get_walkable(game, player->x / T_WIDTH,
                                               player->y / T_HEIGHT);

            int speed = (on_walkable >= 0 && on_walkable < WALKABLE_TILE_MAX)
                            ? walkable_speed[on_walkable]
                            : 0;

            /* if he's on a hard tile and we need to revert the changes as */
            /* tile on the next side of the border is not walkable */

            if(!speed) {
                game->map_level = backupmap;
                player->x = backupx;
                player->y = backupy;
                player->wx = backupwx;
                player->wy = backupwy;
                return true; /* He will collide with it. */
            }

            /* we update the list of NPCs in the current map */
            /* to follow the trajectories */
            reload_npc(game);

            return false;
        }
    }

    /* Handle a negative position differently than a positive one. */
    if(player_tile_x < 0)
        player_tile_x = player_tile_x / T_WIDTH - 1;
    else
        player_tile_x = player_tile_x / T_WIDTH;

    if(player_tile_y < 0)
        player_tile_y = player_tile_y / T_HEIGHT - 1;
    else
        player_tile_y = player_tile_y / T_HEIGHT;

    int on_walkable = map_get_walkable(game, player_tile_x, player_tile_y);

    int speed = (on_walkable >= 0 && on_walkable < WALKABLE_TILE_MAX)
                    ? walkable_speed[on_walkable]
                    : 0;

    /* if he's on a hard tile */
    if(!speed) {
        return true; /* He will collide with it. */
    }

    player->speed = speed;

    return false; /* He won't collide with a hard tile. */
}

void player_fix_position(Game *game, bool fix_x, bool fix_y) {

    Player *player = &game->player;

    /* I fix his poition on x or/and on y if y need to, so that he won't be over
     * the hard tile that he collided with. */
    if(fix_x)
        player->x = player->x / T_WIDTH * T_WIDTH + P_WIDTH / 2;

    if(fix_y)
        player->y = player->y / T_HEIGHT * T_HEIGHT + P_HEIGHT / 2;
}

void player_damage(Game *game, int amount) {

    Player *player = &game->player;

    player->life -= amount;
    /* TODO: Let the player dye if life < 1. */
};