245 lines
7.5 KiB
C
245 lines
7.5 KiB
C
#include "player.h"
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#include "animation_player.h"
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#include "state_machine.h"
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#include <SDL2/SDL_events.h>
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#include <SDL2/SDL_keyboard.h>
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#include <SDL2/SDL_scancode.h>
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#include <SDL2/SDL_render.h>
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#include <stdbool.h>
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#include <stdint.h>
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#define SPRITE_WIDTH 100
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#define SPRITE_HEIGHT 64
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void get_player_controls(Player *player);
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void set_x_movement (Player *player);
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void player_move (Player *player);
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void player_dash (Player *player);
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void player_jump (Player *player);
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void player_fall (Player *player);
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bool player_on_ground (Player *player);
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int32_t player_gravity (Player *player);
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State *update_state (Player *player, uint32_t state);
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State *idle_state (StateMachine *sm, Player *player);
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State *walk_state (StateMachine *sm, Player *player);
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State *dash_state (StateMachine *sm, Player *player);
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State *jump_state (StateMachine *sm, Player *player);
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State *fall_state (StateMachine *sm, Player *player);
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void player_init(Player *player, SDL_Renderer *renderer, SDL_Rect position) {
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player->base_y = position.y;
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player->position = position;
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player->movement = (Movement){0};
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player->x_direction = PLAYER_DIRECTION_RIGHT;
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player->velocity = 4;
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player->animations[PLAYER_STATE_IDLE] =
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ap_init(renderer, "knight_player/Idle_KG_2.png", 125, SPRITE_WIDTH, SPRITE_HEIGHT, true);
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player->animations[PLAYER_STATE_WALK] =
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ap_init(renderer, "knight_player/Walking_KG_2.png", 125, SPRITE_WIDTH, SPRITE_HEIGHT, true);
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player->animations[PLAYER_STATE_DASH] =
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ap_init(renderer, "knight_player/Dashing_KG_1.png", 125, SPRITE_WIDTH, SPRITE_HEIGHT, false);
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player->animations[PLAYER_STATE_JUMP] =
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ap_init(renderer, "knight_player/Jump_KG_2.png", 100, SPRITE_WIDTH, SPRITE_HEIGHT, false);
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player->animations[PLAYER_STATE_FALL] =
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ap_init(renderer, "knight_player/Fall_KG_2.png", 50, SPRITE_WIDTH, SPRITE_HEIGHT, false);
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player->states[PLAYER_STATE_IDLE] = (State){ .state_func = (StateFunc *)idle_state };
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player->states[PLAYER_STATE_WALK] = (State){ .state_func = (StateFunc *)walk_state };
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player->states[PLAYER_STATE_DASH] = (State){ .state_func = (StateFunc *)dash_state };
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player->states[PLAYER_STATE_JUMP] = (State){ .state_func = (StateFunc *)jump_state };
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player->states[PLAYER_STATE_FALL] = (State){ .state_func = (StateFunc *)fall_state };
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player->state_machine = (StateMachine){ .current_state = &(player->states[PLAYER_STATE_IDLE]) };
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player->current_state = PLAYER_STATE_IDLE;
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player->controls = (PlayerControl){0};
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}
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void player_update(Player *player, uint32_t ticks) {
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get_player_controls(player);
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sm_run(&(player->state_machine), (void *)player);
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player_move(player);
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ap_update(&(player->animations[player->current_state]), ticks);
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}
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void player_draw(const Player *player, SDL_Renderer *renderer) {
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ap_draw(renderer, &(player->animations[player->current_state]), &(player->position), player->x_direction == PLAYER_DIRECTION_LEFT);
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}
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void get_player_controls(Player *player) {
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const uint8_t *keys = SDL_GetKeyboardState(NULL);
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player->controls.walk_left = keys[SDL_SCANCODE_LEFT] == SDL_PRESSED;
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player->controls.walk_right = keys[SDL_SCANCODE_RIGHT] == SDL_PRESSED;
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player->controls.space_last = player->controls.space_pressed;
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player->controls.space_pressed = keys[SDL_SCANCODE_SPACE] == SDL_PRESSED;
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player->controls.jump = player->controls.space_last && !(player->controls.space_pressed);
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player->controls.lctrl_last = player->controls.lctrl_pressed;
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player->controls.lctrl_pressed = keys[SDL_SCANCODE_LCTRL] == SDL_PRESSED;
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player->controls.dash = player->controls.lctrl_last && !(player->controls.lctrl_pressed);
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}
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void set_x_movement(Player *player) {
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if (player->controls.walk_left) {
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player->movement.x = PLAYER_DIRECTION_LEFT * player->velocity;
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player->x_direction = PLAYER_DIRECTION_LEFT;
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} else if (player->controls.walk_right) {
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player->movement.x = PLAYER_DIRECTION_RIGHT * player->velocity;
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player->x_direction = PLAYER_DIRECTION_RIGHT;
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} else if (!(player->controls.walk_left) && !(player->controls.walk_right)) {
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player->movement.x = 0;
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}
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}
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void player_move(Player *player) {
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player->position.x += player->movement.x;
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player->position.y += player->movement.y;
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if (player->position.y > player->base_y) {
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player->position.y = player->base_y;
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}
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}
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void player_dash(Player *player) {
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player->movement.x = player->x_direction * player->velocity * 2;
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}
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void player_jump(Player *player) {
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player->movement.y = player->velocity * 7 * -1;
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}
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void player_fall(Player *player) {
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player->movement.y = player->velocity * 6;
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}
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bool player_on_ground(Player *player) {
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return player->position.y == player->base_y;
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}
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int32_t player_gravity(Player *player) {
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return player->velocity * 0.5;
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}
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bool player_falling(Player *player) {
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return player->movement.y > 0;
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}
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State *update_state(Player *player, uint32_t state) {
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if (state >= COUNT_PLAYER_STATES) {
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return &(player->states[player->current_state]);
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}
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player->current_state = state;
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return &(player->states[state]);
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}
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State *idle_state(StateMachine *sm, Player *player) {
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uint32_t state = PLAYER_STATE_IDLE;
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if (player->controls.jump) {
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player_jump(player);
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state = PLAYER_STATE_JUMP;
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} else if (player->controls.walk_left) {
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state = PLAYER_STATE_WALK;
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} else if (player->controls.walk_right) {
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state = PLAYER_STATE_WALK;
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}
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set_x_movement(player);
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return update_state(player, state);
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}
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State *walk_state(StateMachine *sm, Player *player) {
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uint32_t state = PLAYER_STATE_WALK;
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if (player->controls.jump) {
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player_jump(player);
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state = PLAYER_STATE_JUMP;
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} else if (player->controls.dash) {
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player_dash(player);
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player->controls.jump_dash = false;
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state = PLAYER_STATE_DASH;
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}
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if (!(player->controls.walk_left) && !(player->controls.walk_right)) {
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state = PLAYER_STATE_IDLE;
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}
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set_x_movement(player);
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return update_state(player, state);
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}
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State *dash_state(StateMachine *sm, Player *player) {
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bool reset = false;
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uint32_t state = PLAYER_STATE_DASH;
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player->movement.x += player->x_direction * (int32_t)player->velocity * 0.5;
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if (player->animations[PLAYER_STATE_DASH].finished) {
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if (player->controls.jump_dash) {
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player_fall(player);
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state = PLAYER_STATE_FALL;
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} else {
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player->movement.x = 0;
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state = PLAYER_STATE_IDLE;
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}
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reset = true;
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}
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if (reset) {
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ap_reset(&(player->animations[PLAYER_STATE_DASH]));
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}
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return update_state(player, state);
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}
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State *jump_state(StateMachine *sm, Player *player) {
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bool reset = false;
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uint32_t state = PLAYER_STATE_JUMP;
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player->movement.y += player_gravity(player);
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if (player->controls.dash) {
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player_dash(player);
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player->controls.jump_dash = true;
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player->movement.y = player_gravity(player);
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reset = true;
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state = PLAYER_STATE_DASH;
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} else if (player->animations[PLAYER_STATE_JUMP].finished) {
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player_fall(player);
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reset = true;
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state = PLAYER_STATE_FALL;
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}
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if (reset) {
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ap_reset(&(player->animations[PLAYER_STATE_JUMP]));
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}
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set_x_movement(player);
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return update_state(player, state);
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}
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State *fall_state(StateMachine *sm, Player *player) {
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bool reset = false;
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uint32_t state = PLAYER_STATE_FALL;
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if (player->animations[PLAYER_STATE_FALL].finished && player_on_ground(player)) {
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player->movement.y = 0;
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reset = true;
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state = PLAYER_STATE_IDLE;
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}
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if (reset) {
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ap_reset(&(player->animations[PLAYER_STATE_FALL]));
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}
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set_x_movement(player);
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return update_state(player, state);
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}
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