alvierahman90/untitled2dshooter
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all collision information is stored with sprites, support multiple sprites

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This commit is contained in:
Akbar Rahman
2022-06-10 23:07:14 +01:00
parent 776cf354f8
commit 0615ab5073
9 changed files with 147 additions and 55 deletions
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9
src/flags.h
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@@ -24,6 +24,15 @@
#define SC_IBL 0b0010
#define SC_IBR 0b0001
#define SI_UP 0
#define SI_DOWN 1
#define SI_LEFT 2
#define SI_RIGHT 3
#define SI_UP_RIGHT 4
#define SI_DOWN_RIGHT 5
#define SI_UP_LEFT 6
#define SI_DOWN_LEFT 7
/* Sprite Collision point diagram:
* x TL LT x
* ------------

46
src/main.c
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@@ -1,24 +1,25 @@
#include <gb/gb.h>
#include <gb/drawing.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "../res/tiles.h"
#include "../res/map.h"
#include"../res/sprites.h"
#include"../res/sprite_metadata.h"
#include "./flags.h"
#include "./constants.h"
#include "./sprite.h"
#include "./vec.h"
#define SPRITE_NO 11
#define NO_SCREEN_SPRITES 2
void init_gfx()
{
// Load Background tiles and then map
set_bkg_data(0, 23, tiles);
set_bkg_tiles(0, 0, map.width, map.height, map.data);
set_sprite_data(0, 12, sprites);
set_sprite_tile(0, SPRITE_NO);
set_sprite_prop(0, 0);
set_sprite_data(0, 14, sprites);
// Turn the background map on to make it visible
SHOW_BKG;
@@ -27,26 +28,35 @@ void init_gfx()
void main(void)
{
unsigned int fc = 0;
struct Sprites sprite;
init_gfx();
sprite.pos.x = 72;
sprite.pos.y = 36;
sprite.vel.x = 0;
sprite.vel.y = 0;
sprite.acc.x = 0;
sprite.acc.y = 0;
sprite.collision_offset = sprite_offsets[SPRITE_NO];
move_sprite(0, sprite.pos.x, sprite.pos.y);
unsigned int i, jp, fc = 0;
struct Sprites screen_sprites[NO_SCREEN_SPRITES];
memcpy(&(screen_sprites[0]), &(sprites_info[0]), sizeof(Sprite));
memcpy(&(screen_sprites[1]), &(sprites_info[0]), sizeof(Sprite));
screen_sprites[0].has_joypad = 1;
screen_sprites[1].bitmap_index = SI_UP;
for (i = 0; i < NO_SCREEN_SPRITES; i++) {
set_sprite_tile(i, screen_sprites[i].bitmap_indexes[screen_sprites[i].bitmap_index]);
set_sprite_prop(i, screen_sprites[i].bitmap_prop[screen_sprites[i].bitmap_index]);
screen_sprites[i].pos.x = 72+(8*i);
screen_sprites[i].pos.y = 36+(8*i);
move_sprite(i, screen_sprites[i].pos.x, screen_sprites[i].pos.y);
}
// Loop forever
while(1) {
fc++;
sprite_iter_frame(&sprite, &map, joypad(), &fc);
move_sprite(0, sprite.pos.x, sprite.pos.y);
jp = joypad();
for (i = 0; i < NO_SCREEN_SPRITES; i++) {
sprite_iter_frame(&(screen_sprites[i]), &map, screen_sprites[i].has_joypad ? jp : 0, &fc);
move_sprite(i, screen_sprites[i].pos.x, screen_sprites[i].pos.y);
//gprintf("x: %d y: %d\n", sprites[i].pos.x, sprites[i].pos.y);
}
// Done processing, yield CPU and wait for start of next frame
wait_vbl_done();

32
src/sprite.c
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@@ -17,7 +17,13 @@ typedef struct SpriteCorners {
typedef struct Sprites {
int frames_since_last_dash;
int frames_since_last_jump;
SpriteCorners collision_offset;
int bitmap_index;
int bitmap_indexes[8];
int bitmap_prop[8];
int has_diag_sprites;
int has_joypad;
char name[20];
SpriteCorners collision_offset[8];
UVec pos;
Vec vel;
Vec acc;
@@ -25,7 +31,7 @@ typedef struct Sprites {
int get_tile_index_by_coord(unsigned int x, unsigned int y);
void getSpriteCorners(Sprite *sprite, SpriteCorners *r);
void get_sprite_corners(Sprite *sprite, SpriteCorners *r);
void sprite_iter_frame(Sprite *sprite, Map *map, int joypad, unsigned int *fc);
unsigned int sprite_internal_collision(Map *map, Sprite *sprite);
unsigned int sprite_collision(Map *map, Sprite *sprite);
@@ -37,16 +43,16 @@ int get_tile_index_by_coord(unsigned int x, unsigned int y)
}
void getSpriteCorners(Sprite *sprite, SpriteCorners *sc)
void get_sprite_corners(Sprite *sprite, SpriteCorners *sc)
{
sc->itl.x = sprite->pos.x - sprite->collision_offset.itl.x;
sc->itl.y = sprite->pos.y - sprite->collision_offset.itl.y - 8;
sc->itr.x = sprite->pos.x - sprite->collision_offset.itr.x;
sc->itr.y = sprite->pos.y - sprite->collision_offset.itr.y - 8;
sc->ibl.x = sprite->pos.x - sprite->collision_offset.ibl.x;
sc->ibl.y = sprite->pos.y - sprite->collision_offset.ibl.y - 8;
sc->ibr.x = sprite->pos.x - sprite->collision_offset.ibr.x;
sc->ibr.y = sprite->pos.y - sprite->collision_offset.ibr.y - 8;
sc->itl.x = sprite->pos.x - sprite->collision_offset[sprite->bitmap_index].itl.x;
sc->itl.y = sprite->pos.y - sprite->collision_offset[sprite->bitmap_index].itl.y - 8;
sc->itr.x = sprite->pos.x - sprite->collision_offset[sprite->bitmap_index].itr.x;
sc->itr.y = sprite->pos.y - sprite->collision_offset[sprite->bitmap_index].itr.y - 8;
sc->ibl.x = sprite->pos.x - sprite->collision_offset[sprite->bitmap_index].ibl.x;
sc->ibl.y = sprite->pos.y - sprite->collision_offset[sprite->bitmap_index].ibl.y - 8;
sc->ibr.x = sprite->pos.x - sprite->collision_offset[sprite->bitmap_index].ibr.x;
sc->ibr.y = sprite->pos.y - sprite->collision_offset[sprite->bitmap_index].ibr.y - 8;
}
@@ -149,7 +155,7 @@ unsigned int sprite_internal_collision(Map *map, Sprite *sprite)
{
unsigned int rv = 0;
SpriteCorners sc;
getSpriteCorners(sprite, &sc);
get_sprite_corners(sprite, &sc);
if (map->data[get_tile_index_by_coord(sc.itl.x, sc.itl.y)]) rv = rv | SC_ITL;
if (map->data[get_tile_index_by_coord(sc.itr.x, sc.itr.y)]) rv = rv | SC_ITR;
@@ -165,7 +171,7 @@ unsigned int sprite_collision(Map *map, Sprite *sprite)
{
unsigned int rv = 0;
SpriteCorners sc;
getSpriteCorners(sprite, &sc);
get_sprite_corners(sprite, &sc);
// check if corners are in a non 0 tile
if (map->data[get_tile_index_by_coord(sc.itl.x, sc.itl.y-1)]) rv = rv | SC_TL;

8
src/sprite.h
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@@ -14,7 +14,13 @@ typedef struct SpriteCorners {
typedef struct Sprites {
int frames_since_last_dash;
int frames_since_last_jump;
SpriteCorners collision_offset;
int bitmap_index;
int bitmap_indexes[8];
int bitmap_prop[8];
int has_diag_sprites;
int has_joypad;
char name[20];
SpriteCorners collision_offset[8];
UVec pos;
Vec vel;
Vec acc;