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Use directional sprites for player

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This commit is contained in:
Camden Dixie O'Brien 2024-12-28 14:27:13 +00:00
parent 10bb223bdd
commit c5daa136c1
1 changed files with 39 additions and 11 deletions
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50
app/main.c
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@ -29,15 +29,24 @@
#define TSASSET "/tileset.png"
#define TSCOLS 56
#define PIASSET "/player/idle/down.png"
#define PIWIDTH 48
#define PIHEIGHT 64
#define PIANIMLEN 8
#define PIDLE_ASSET "/player/idle.png"
#define PWIDTH 48
#define PHEIGHT 64
#define PANIMLEN 8
#define WALKSPEED 72 // pixels per second
#define BASEANIMPERIOD 200
typedef enum {
SPRITE_DIR_DOWN = 0,
SPRITE_DIR_LEFT_DOWN = 1,
SPRITE_DIR_LEFT_UP = 2,
SPRITE_DIR_UP = 3,
SPRITE_DIR_RIGHT_UP = 4,
SPRITE_DIR_RIGHT_DOWN = 5,
} sprite_dir_t;
typedef struct {
bool left, right, up, down;
} input_state_t;
@ -49,7 +58,7 @@ typedef struct {
static SDL_Window *window;
static SDL_Renderer *renderer;
static unsigned map[MAPWIDTH][MAPHEIGHT];
static SDL_Texture *tstex, *pitex;
static SDL_Texture *tstex, *pidle;
static input_state_t input;
static inline double mag(dvec_t v)
@ -155,17 +164,18 @@ int main(int argc, char *argv[])
assert(NULL != tstex);
// Load player idle spritesheet
assert(strlen(argv[1]) + strlen(PIASSET) < MAX_PATH_LEN);
assert(strlen(argv[1]) + strlen(PIDLE_ASSET) < MAX_PATH_LEN);
strcpy(path, argv[1]);
strcat(path, PIASSET);
pitex = IMG_LoadTexture(renderer, path);
assert(NULL != pitex);
strcat(path, PIDLE_ASSET);
pidle = IMG_LoadTexture(renderer, path);
assert(NULL != pidle);
// Initialize view and player
dvec_t vpos = { 512, 0 };
SDL_Rect psrc = { .y = 0, .w = PIWIDTH, .h = PIHEIGHT };
SDL_Rect pdest = { .w = SCALE * PIWIDTH, .h = SCALE * PIHEIGHT };
SDL_Rect psrc = { .y = 0, .w = PWIDTH, .h = PHEIGHT };
SDL_Rect pdest = { .w = SCALE * PWIDTH, .h = SCALE * PHEIGHT };
dvec_t pvel = { 0, 0 }, ppos = { 640, 96 };
sprite_dir_t pdir = SPRITE_DIR_DOWN;
SDL_Event event;
uint64_t prevt = SDL_GetTicks64();
@ -232,6 +242,23 @@ int main(int argc, char *argv[])
pvel.y *= WALKSPEED / pspeed;
ppos.x += (double)dt / 1000.0 * pvel.x;
ppos.y += (double)dt / 1000.0 * pvel.y;
// Update direction
if (pvel.y >= 0) {
if (pvel.x > 0)
pdir = SPRITE_DIR_RIGHT_DOWN;
else if (pvel.x < 0)
pdir = SPRITE_DIR_LEFT_DOWN;
else
pdir = SPRITE_DIR_DOWN;
} else if (pvel.y < 0) {
if (pvel.x > 0)
pdir = SPRITE_DIR_RIGHT_UP;
else if (pvel.x < 0)
pdir = SPRITE_DIR_LEFT_UP;
else
pdir = SPRITE_DIR_UP;
}
}
// Update view
@ -277,6 +304,7 @@ int main(int argc, char *argv[])
// Draw player
const unsigned piframe = (t / BASEANIMPERIOD) % PANIMLEN;
psrc.x = PWIDTH * piframe;
psrc.y = PHEIGHT * pdir;
pdest.x = SCALE * (int)(ppos.x - vpos.x - PWIDTH / 2);
pdest.y = SCALE * (int)(ppos.y - vpos.y - PHEIGHT / 2);
SDL_RenderCopy(renderer, pidle, &psrc, &pdest);