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Render player with animated sprite

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This commit is contained in:
Camden Dixie O'Brien 2024-12-27 17:13:33 +00:00
parent fa7315d6b3
commit 39e8002caf
1 changed files with 66 additions and 29 deletions
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95
app/main.c
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@ -10,9 +10,11 @@
#include <libxml/parser.h>
#include <string.h>
#define SCALE 4
#define TILESIZE 32
#define VIEWWIDTH 30
#define VIEWHEIGHT 20
#define VIEWWIDTH 8
#define VIEWHEIGHT 6
#define MAX_PATH_LEN 128
@ -25,10 +27,17 @@
#define TSASSET "/tileset.png"
#define TSCOLS 56
#define PIASSET "/player/idle/down.png"
#define PIWIDTH 48
#define PIHEIGHT 64
#define PIANIMLEN 8
#define BASEANIMPERIOD 200
static SDL_Window *window;
static SDL_Renderer *renderer;
static unsigned map[MAPWIDTH][MAPHEIGHT];
static SDL_Texture *tstex;
static SDL_Texture *tstex, *pitex;
int main(int argc, char *argv[])
{
@ -44,7 +53,7 @@ int main(int argc, char *argv[])
assert(0 == err);
window = SDL_CreateWindow(
"2D Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
TILESIZE * VIEWWIDTH, TILESIZE * VIEWHEIGHT, 0);
SCALE * TILESIZE * VIEWWIDTH, SCALE * TILESIZE * VIEWHEIGHT, 0);
assert(NULL != window);
renderer = SDL_CreateRenderer(window, -1, 0);
assert(NULL != renderer);
@ -127,34 +136,24 @@ int main(int argc, char *argv[])
tstex = IMG_LoadTexture(renderer, path);
assert(NULL != tstex);
// Render map -- no motion yet so just needs to be done once
int offx = 0, offy = 0;
SDL_RenderClear(renderer);
for (int y = 0; y < VIEWHEIGHT; ++y) {
for (int x = 0; x < VIEWWIDTH; ++x) {
const unsigned tileid
= map[x + offx + MAPSHIFTX][y + offy + MAPSHIFTY];
if (0 == tileid)
continue;
const SDL_Rect src = {
.x = TILESIZE * ((tileid - 1) % TSCOLS),
.y = TILESIZE * ((tileid - 1) / TSCOLS),
.w = TILESIZE,
.h = TILESIZE,
};
const SDL_Rect dest = {
.x = TILESIZE * x,
.y = TILESIZE * y,
.w = TILESIZE,
.h = TILESIZE,
};
SDL_RenderCopy(renderer, tstex, &src, &dest);
}
}
SDL_RenderPresent(renderer);
// Load player idle spritesheet
assert(strlen(argv[1]) + strlen(PIASSET) < MAX_PATH_LEN);
strcpy(path, argv[1]);
strcat(path, PIASSET);
pitex = IMG_LoadTexture(renderer, path);
assert(NULL != pitex);
int offx = 16, offy = 0;
const SDL_Rect pdest = {
.x = SCALE * 80,
.y = SCALE * 80,
.w = SCALE * PIWIDTH,
.h = SCALE * PIHEIGHT,
};
SDL_Event event;
while (1) {
// Handle events
SDL_PollEvent(&event);
switch (event.type) {
case SDL_QUIT:
@ -163,6 +162,44 @@ int main(int argc, char *argv[])
default:
break;
}
SDL_RenderClear(renderer);
// Draw map
for (int y = 0; y < VIEWHEIGHT; ++y) {
for (int x = 0; x < VIEWWIDTH; ++x) {
const unsigned tileid
= map[x + offx + MAPSHIFTX][y + offy + MAPSHIFTY];
if (0 == tileid)
continue;
const SDL_Rect src = {
.x = TILESIZE * ((tileid - 1) % TSCOLS),
.y = TILESIZE * ((tileid - 1) / TSCOLS),
.w = TILESIZE,
.h = TILESIZE,
};
const SDL_Rect dest = {
.x = SCALE * TILESIZE * x,
.y = SCALE * TILESIZE * y,
.w = SCALE * TILESIZE,
.h = SCALE * TILESIZE,
};
SDL_RenderCopy(renderer, tstex, &src, &dest);
}
}
// Draw player
const unsigned piframe
= (SDL_GetTicks64() / BASEANIMPERIOD) % PIANIMLEN;
const SDL_Rect psrc = {
.x = PIWIDTH * piframe,
.y = 0,
.w = PIWIDTH,
.h = PIHEIGHT,
};
SDL_RenderCopy(renderer, pitex, &psrc, &pdest);
SDL_RenderPresent(renderer);
}
quit: