#include "util.h"
#include "intr.h"
#include "input.h"
-#include "player.h"
+#include "gba.h"
#include "sprite.h"
+#include "timer.h"
#include "debug.h"
-#include "level.h"
-#include "xgl.h"
-#include "polyfill.h"
+#include "voxscape.h"
+#include "data.h"
+#include "scoredb.h"
-static void update(void);
+#define POS_MASK ((VOX_SZ << 16) - 1)
+
+#define FOV 30
+#define NEAR 2
+#define FAR 85
+
+#define P_RATE 250
+#define E_RATE 3000
+#define SHOT_TIME 50
+
+#define ENEMY_VIS_RANGE (2 * FAR / 3)
+
+static int gamescr_start(void);
+static void gamescr_stop(void);
+static void gamescr_frame(void);
+static void gamescr_vblank(void);
+
+static int update(void);
static void draw(void);
-static void vblank(void);
-
-static int nframes, num_vbl, backbuf;
-static uint16_t *vram[] = { (uint16_t*)VRAM_LFB_FB0_ADDR, (uint16_t*)VRAM_LFB_FB1_ADDR };
-
-static const char *testlvl =
- "########\n"
- "### s#\n"
- "### ####\n"
- "### #\n"
- "## #\n"
- "## #\n"
- "## #\n"
- "## ### #\n"
- "## ### #\n"
- "## #\n"
- "#### ###\n"
- "########\n";
-
-static struct xvertex tm_floor[] __attribute__((section(".rodata"))) = {
- {0x10000, -0x10000, 0x10000, 0, 0x10000, 0, 210},
- {-0x10000, -0x10000, 0x10000, 0, 0x10000, 0, 210},
- {-0x10000, -0x10000, -0x10000, 0, 0x10000, 0, 210},
- {0x10000, -0x10000, -0x10000, 0, 0x10000, 0, 210}
+static void victory(void);
+
+static struct screen gamescr = {
+ "game",
+ gamescr_start,
+ gamescr_stop,
+ gamescr_frame,
+ gamescr_vblank
+};
+
+#define ENEMY_ENERGY 4
+struct enemy {
+ struct vox_object vobj;
+ short hp;
+ unsigned char anm;
+ signed char shot_frame;
+ int last_shot;
};
+#define ENEMY_VALID(e) ((e)->anm != 0)
+#define NUM_SHOT_FRAMES 16
+
+#define SFRM_LVL1 5
+#define SFRM_LVL2 12
+
+static uint16_t *framebuf;
+
+static int nframes, backbuf;
+static uint16_t *vram[] = { gba_vram_lfb0, gba_vram_lfb1 };
+
+static int32_t pos[2], angle, horizon = 80;
+static long last_shot, hitfrm;
+static int hit_px, hit_py;
+static int pheight;
+
+#define COLOR_HORIZON 192
+#define COLOR_ZENITH 255
+
+#define MAX_SPR 48
+static uint16_t oam[4 * MAX_SPR];
+static int dynspr_base, dynspr_count;
+
+#define MAX_ENEMIES (255 - CMAP_SPAWN0)
+static struct enemy enemies[MAX_ENEMIES];
+static int num_kills, total_enemies;
+static int energy;
+#define MAX_ENERGY 5
-static struct level *lvl;
+static int score, gameover;
+static unsigned long total_time, start_time;
+static int running;
-static struct player player;
+#define XFORM_PIXEL_X(x, y) (xform_ca * (x) - xform_sa * (y) + (120 << 8))
+#define XFORM_PIXEL_Y(x, y) (xform_sa * (x) + xform_ca * (y) + (80 << 8))
+static int32_t xform_sa, xform_ca; /* for viewport bank/zoom */
+static int xform_s;
+static short vblcount;
+static void *prev_iwram_top;
-void gamescr(void)
+static int hit_frame;
+static uint16_t color0;
+
+static inline void xform_pixel(int *xp, int *yp);
+
+
+struct screen *init_game_screen(void)
{
- unsigned char *fb;
+ return &gamescr;
+}
- REG_DISPCNT = 4 | DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1;
+static void setup_palette(void)
+{
+ int i;
+ unsigned char *cmap = gba_colors ? color_gba_cmap : color_cmap;
- vblperf_setcolor(0xff);
+ for(i=0; i<256; i++) {
+ int r = cmap[i * 3];
+ int g = cmap[i * 3 + 1];
+ int b = cmap[i * 3 + 2];
+ gba_bgpal[i] = RGB555(r, g, b);
+ }
- lvl = init_level(testlvl);
+ color0 = gba_bgpal[0];
+}
- xgl_init();
+static int gamescr_start(void)
+{
+ int i, j, sidx;
+ uint8_t *cptr;
+ struct enemy *enemy;
- memset(&player, 0, sizeof player);
- player.y = 0x60000;
+ prev_iwram_top = iwram_sbrk(0);
- select_input(BN_DPAD | BN_A | BN_B);
+ gba_setmode(4, DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1);
+ fillblock_16byte(gba_vram_lfb1, 0, 240 * 160 / 16);
- mask(INTR_VBLANK);
- screen_vblank = vblank;
- unmask(INTR_VBLANK);
+ vblperf_setcolor(0);
+
+ pos[0] = pos[1] = VOX_SZ << 15;
+ angle = 0x8000;
+ last_shot = -P_RATE - 1;
+
+ vox_init(VOX_SZ, VOX_SZ, height_pixels, color_pixels);
+ vox_proj(FOV, NEAR, FAR);
+ pheight = vox_view(pos[0], pos[1], -40, angle);
+
+ /* setup color image palette */
+ setup_palette();
+
+ spr_setup(16, 16, spr_game_pixels, gba_colors ? spr_game_gba_cmap : spr_game_cmap);
+ wait_vblank();
+ spr_clear();
+
+ for(i=0; i<MAX_SPR; i++) {
+ spr_oam_clear(oam, i);
+ }
+
+ sidx = 0;
+ spr_oam(oam, sidx++, SPRID_CROSS, 120-8, 80-8, SPR_SZ16 | SPR_256COL);
+ spr_oam(oam, sidx++, SPRID_UIMID, 0, 144, SPR_VRECT | SPR_256COL);
+ spr_oam(oam, sidx++, SPRID_UIRIGHT, 48, 144, SPR_SZ16 | SPR_256COL);
+ spr_oam(oam, sidx++, SPRID_UILEFT, 168, 144, SPR_SZ16 | SPR_256COL);
+ spr_oam(oam, sidx++, SPRID_UITGT, 184, 144, SPR_SZ16 | SPR_256COL);
+ spr_oam(oam, sidx++, SPRID_UISLASH, 216, 144, SPR_VRECT | SPR_256COL);
+ dynspr_base = sidx;
+
+ num_kills = total_enemies = 0;
+ energy = 5;
+
+ memset(enemies, 0, sizeof enemies);
+ cptr = color_pixels;
+ for(i=0; i<VOX_SZ; i++) {
+ for(j=0; j<VOX_SZ; j++) {
+ if(*cptr == 255) {
+ /* player spawn point */
+ pos[0] = j << 16;
+ pos[1] = i << 16;
+
+ } else if(*cptr >= CMAP_SPAWN0 && *cptr != 255) {
+ /* enemy spawn point */
+ int idx = *cptr - CMAP_SPAWN0;
+ enemy = enemies + idx;
+ if(enemy->anm) {
+ panic(get_pc(), "double spawn %d at %d,%d (prev: %d,%d)", idx,
+ j, i, enemy->vobj.x, enemy->vobj.y);
+ }
+ enemy->vobj.x = j;
+ enemy->vobj.y = i;
+ enemy->vobj.px = -1;
+ enemy->anm = 0xff;
+ enemy->hp = ENEMY_ENERGY;
+ enemy->last_shot = -1;
+ enemy->shot_frame = -1;
+ if(++total_enemies >= MAX_ENEMIES) {
+ goto endspawn;
+ }
+ }
+ cptr++;
+ }
+ }
+endspawn:
+ /* check continuity */
+ for(i=0; i<total_enemies; i++) {
+ if(enemies[i].anm <= 0) {
+ panic(get_pc(), "discontinuous enemy list");
+ }
+ enemies[i].anm = rand() & 7;
+ }
+
+ vox_objects((struct vox_object*)enemies, total_enemies, sizeof *enemies);
+ energy = MAX_ENERGY;
+ xform_sa = 0;
+ xform_ca = 0x10000;
+ xform_s = 0x100;
+
+ gameover = 0;
+ score = -1;
+ total_time = 0;
+ start_time = timer_msec;
+
+ hitfrm = 0;
+
+ vblcount = 0;
nframes = 0;
- for(;;) {
- backbuf = ++nframes & 1;
- fb = (unsigned char*)vram[backbuf];
- polyfill_framebuffer(fb, 240, 160);
- fillblock_16byte(fb, 0, 240 * 160 / 16);
+ running = 1;
+ return 0;
+}
+
+static void gamescr_stop(void)
+{
+ running = 0;
+
+ iwram_brk(prev_iwram_top);
- update();
- draw();
+ wait_vblank();
+ /* clear sprites */
+ spr_clear();
+ /* reset background rot/scale state */
+ REG_BG2X = 0;
+ REG_BG2Y = 0;
+ REG_BG2PA = 0x100;
+ REG_BG2PB = 0;
+ REG_BG2PC = 0;
+ REG_BG2PD = 0x100;
- vblperf_end();
- wait_vblank();
- present(backbuf);
- vblperf_begin();
+}
+
+static void gamescr_frame(void)
+{
+ backbuf = ++nframes & 1;
+ framebuf = vram[backbuf];
+
+ vox_framebuf(240, 160, framebuf, horizon);
+
+ if(update() == -1) {
+ return;
}
+ draw();
+
+ vblperf_end();
+ wait_vblank();
+ present(backbuf);
+
+ /*
+ if(!(nframes & 15)) {
+ emuprint("vbl: %d", vblperf_count);
+ }*/
+#ifdef VBLBAR
+ vblperf_begin();
+#else
+ vblperf_count = 0;
+#endif
}
-static void update(void)
+#define NS(x) (SPRID_UINUM + ((x) << 1))
+static int numspr[][2] = {
+ {NS(0),NS(0)}, {NS(0),NS(1)}, {NS(0),NS(2)}, {NS(0),NS(3)}, {NS(0),NS(4)},
+ {NS(0),NS(5)}, {NS(0),NS(6)}, {NS(0),NS(7)}, {NS(0),NS(8)}, {NS(0),NS(9)},
+ {NS(1),NS(0)}, {NS(1),NS(1)}, {NS(1),NS(2)}, {NS(1),NS(3)}, {NS(1),NS(4)},
+ {NS(1),NS(5)}, {NS(1),NS(6)}, {NS(1),NS(7)}, {NS(1),NS(8)}, {NS(1),NS(9)},
+ {NS(2),NS(0)}, {NS(2),NS(1)}, {NS(2),NS(2)}, {NS(2),NS(3)}, {NS(2),NS(4)},
+ {NS(2),NS(5)}, {NS(2),NS(6)}, {NS(2),NS(7)}, {NS(2),NS(8)}, {NS(2),NS(9)},
+ {NS(3),NS(0)}, {NS(3),NS(1)}, {NS(3),NS(2)}, {NS(3),NS(3)}, {NS(3),NS(4)},
+ {NS(3),NS(5)}, {NS(3),NS(6)}, {NS(3),NS(7)}, {NS(3),NS(8)}, {NS(3),NS(9)}
+};
+
+#define WALK_SPEED 0x40000
+#define TURN_SPEED 0x200
+#define ELEV_SPEED 8
+
+#define MAX(a, b) ((a > (b) ? (a) : (b)))
+
+static int update(void)
{
- uint16_t bnstate;
+ int32_t fwd[2], right[2];
+ int i, snum, ledspr;
+ struct enemy *enemy;
+ int did_strafe = 0;
+
+ hit_frame = 0;
+
+ update_keyb();
+
+ if(KEYPRESS(BN_START)) {
+ /* TODO pause menu */
+ change_screen(find_screen("menu"));
+ return -1;
+ }
- bnstate = get_input();
+ if(gameover) {
+ goto skip_game_logic;
+ }
+
+ if(keystate) {
+ if(keystate & BN_LEFT) {
+ angle += TURN_SPEED;
+ }
+ if(keystate & BN_RIGHT) {
+ angle -= TURN_SPEED;
+ }
+
+ fwd[0] = -SIN(angle);
+ fwd[1] = COS(angle);
+ right[0] = fwd[1];
+ right[1] = -fwd[0];
+
+ if(keystate & BN_A) {
+ pos[0] = (pos[0] + fwd[0]) & POS_MASK;
+ pos[1] = (pos[1] + fwd[1]) & POS_MASK;
+ if(pos[0] < 0) pos[0] += VOX_SZ << 16;
+ if(pos[1] < 0) pos[1] += VOX_SZ << 16;
+ }
+
+ if((keystate & BN_B) && (timer_msec - last_shot >= P_RATE)) {
+ last_shot = timer_msec;
+ for(i=0; i<total_enemies; i++) {
+ if(enemies[i].hp && enemies[i].vobj.px >= 0) {
+ int dx = enemies[i].vobj.px - 120;
+ int dy = enemies[i].vobj.py - 80;
+ int rad = enemies[i].vobj.scale >> 5;
+
+ if(rad < 1) rad = 1;
+
+ if(abs(dx) < rad && abs(dy) < (rad << 1)) {
+ enemies[i].shot_frame = -1;
+ if(--enemies[i].hp <= 0) {
+ if(++num_kills >= total_enemies) {
+ victory();
+ }
+ }
+ hit_px = enemies[i].vobj.px;
+ hit_py = enemies[i].vobj.py;
+ hitfrm = nframes;
+ break;
+ }
+ }
+ }
+ }
+ if(keystate & BN_UP) {
+ if(horizon > 40) horizon -= ELEV_SPEED;
+ }
+ if(keystate & BN_DOWN) {
+ if(horizon < 200 - ELEV_SPEED) horizon += ELEV_SPEED;
+ }
+ if(keystate & BN_RT) {
+ pos[0] = (pos[0] + right[0]) & POS_MASK;
+ pos[1] = (pos[1] + right[1]) & POS_MASK;
+ if(pos[0] < 0) pos[0] += VOX_SZ << 16;
+ if(pos[1] < 0) pos[1] += VOX_SZ << 16;
+ did_strafe = 1;
+ }
+ if(keystate & BN_LT) {
+ pos[0] = (pos[0] - right[0]) & POS_MASK;
+ pos[1] = (pos[1] - right[1]) & POS_MASK;
+ if(pos[0] < 0) pos[0] += VOX_SZ << 16;
+ if(pos[1] < 0) pos[1] += VOX_SZ << 16;
+ did_strafe = 1;
+ }
+
+ pheight = vox_view(pos[0], pos[1], -40, angle);
+ }
+
+ /* enemy logic */
+ enemy = enemies;
+ for(i=0; i<total_enemies; i++) {
+ /* only consider enemies which are not dead */
+ if(enemy->hp <= 0) {
+ enemy++;
+ continue;
+ }
+
+ if(enemy->shot_frame >= 0) {
+ /* in the process of charging a shot */
+ if(++enemy->shot_frame >= NUM_SHOT_FRAMES - 1) {
+ /* only get hit if we can see the enemy and we didn't strafe */
+ if(!did_strafe && enemy->vobj.px >= 0) {
+ hit_frame = 1;
+ if(--energy <= 0) {
+ gameover = 1;
+ }
+ }
+ enemy->shot_frame = -1;
+ }
+ } else if(enemy->vobj.px >= 0) {
+ /* check rate of fire and start a shot if necessary */
+ if(enemy->last_shot == -1) {
+ enemy->last_shot = timer_msec;
+ } else if(timer_msec - enemy->last_shot >= E_RATE) {
+ enemy->last_shot = timer_msec;
+ enemy->shot_frame = 0;
+ }
+ }
+ enemy++;
+ }
+
+skip_game_logic:
+
+ snum = 0;
+ /* turrets number */
+ spr_oam(oam, dynspr_base + snum++, numspr[num_kills][0], 200, 144, SPR_VRECT | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, numspr[num_kills][1], 208, 144, SPR_VRECT | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, numspr[total_enemies][0], 224, 144, SPR_VRECT | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, numspr[total_enemies][1], 232, 144, SPR_VRECT | SPR_256COL);
+ /* energy bar */
+ if(energy == MAX_ENERGY) {
+ ledspr = SPRID_LEDBLU;
+ } else {
+ ledspr = energy > 2 ? SPRID_LEDGRN : SPRID_LEDRED;
+ }
+ for(i=0; i<5; i++) {
+ spr_oam(oam, dynspr_base + snum++, i >= energy ? SPRID_LEDOFF : ledspr,
+ 8 + (i << 3), 144, SPR_VRECT | SPR_256COL);
+ }
+ /* blaster sprites */
+ if(timer_msec - last_shot <= SHOT_TIME) {
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS0, -8, 118, SPR_SZ32 | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS1, 22, 103, SPR_SZ32 | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS2, 54, 88, SPR_SZ32 | SPR_256COL);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS3, 86, 72, SPR_SZ32 | SPR_256COL);
+
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS0, 240 + 8 - 32, 118, SPR_SZ32 | SPR_256COL | SPR_HFLIP);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS1, 240 - 22 - 32, 103, SPR_SZ32 | SPR_256COL | SPR_HFLIP);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS2, 240 - 54 - 32, 88, SPR_SZ32 | SPR_256COL | SPR_HFLIP);
+ spr_oam(oam, dynspr_base + snum++, SPRID_LAS3, 240 - 86 - 32, 72, SPR_SZ32 | SPR_256COL | SPR_HFLIP);
+ }
+ /* hit sparks */
+ if(nframes - hitfrm < 5) {
+ int id = SPRID_SPARK0 + (nframes - hitfrm);
+ spr_oam(oam, dynspr_base + snum++, id, hit_px - 16, hit_py - 16,
+ SPR_DBLSZ | SPR_SZ16 | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0));
+ }
+ /* enemy sprites */
+ /*spr_oam(oam, dynspr_base + snum++, SPRID_ENEMY, 50, 50, SPR_VRECT | SPR_SZ64 | SPR_256COL);*/
+ enemy = enemies;
+ for(i=0; i<total_enemies; i++) {
+ int sid, anm, px, py, yoffs;
+ unsigned int flags;
+ int16_t mat[4];
+ int32_t sa, ca, scale;
+
+ if(enemy->vobj.px >= 0) {
+ flags = SPR_DBLSZ | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0);
+ if(enemy->hp > 0) {
+ anm = (enemy->anm + (vblcount >> 3)) & 0xf;
+ sid = SPRID_ENEMY0 + ((anm & 7) << 2);
+ flags |= SPR_SZ32 | SPR_VRECT;
+ yoffs = 32;
+ } else {
+ anm = 0;
+ sid = SPRID_HUSK;
+ flags |= SPR_SZ16;
+ yoffs = 16;
+ }
+
+ px = enemy->vobj.px - 120;
+ py = enemy->vobj.py - 80;
+ xform_pixel(&px, &py);
+
+
+ if(enemy->shot_frame >= 0) {
+ if(enemy->shot_frame < SFRM_LVL1) {
+ spr_oam(oam, dynspr_base + snum++, SPRID_SHOT0, px - 16, py - 16,
+ SPR_DBLSZ | SPR_SZ16 | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0));
+ } else if(enemy->shot_frame < SFRM_LVL2) {
+ spr_oam(oam, dynspr_base + snum++, SPRID_SHOT1, px - 16, py - 16,
+ SPR_DBLSZ | SPR_SZ16 | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0));
+ } else {
+ spr_oam(oam, dynspr_base + snum++, SPRID_SHOT2, px - 16, py - 16,
+ SPR_DBLSZ | SPR_SZ16 | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0));
+ }
+ }
+
+
+ spr_oam(oam, dynspr_base + snum++, sid, px - 16, py - yoffs, flags);
+
+ scale = enemy->vobj.scale;
+ if(scale > 0x10000) scale = 0x10000;
+ sa = xform_sa / scale;
+ ca = xform_ca / scale;
+ mat[0] = anm >= 8 ? -ca : ca;
+ mat[1] = sa;
+ mat[2] = -sa;
+ mat[3] = ca;
+
+ spr_transform(oam, 0, mat);
+ enemy->vobj.px = -1;
+ }
+ enemy++;
+ }
+ for(i=snum; i<dynspr_count; i++) {
+ spr_oam_clear(oam, dynspr_base + i);
+ }
+
+ mask(INTR_VBLANK);
+ dynspr_count = snum;
+ unmask(INTR_VBLANK);
- player_input(&player, bnstate);
+ return 0;
}
static void draw(void)
{
- xgl_load_identity();
- xgl_rotate_x(player.phi);
- xgl_rotate_y(player.theta);
- xgl_translate(player.x, 0, player.y);
+ //dma_fill16(3, framebuf, 0, 240 * 160 / 2);
+ fillblock_16byte(framebuf, 0, 240 * 160 / 16);
+
+ if(hit_frame) {
+ gba_bgpal[0] = 0x7fff;
+ } else {
+ gba_bgpal[0] = color0;
+ vox_render();
+ }
+ //vox_sky_grad(COLOR_HORIZON, COLOR_ZENITH);
+ //vox_sky_solid(COLOR_ZENITH);
+
+ if(score >= 0 || energy <= 0) {
+ int sec = total_time / 1000;
+
+ fillblock_16byte(framebuf + 8 * 240 / 2, 199 | (199 << 8) | (199 << 16) | (199 << 24), 40 * 240 / 16);
+
+ glyphfb = framebuf;
+ glyphbg = 199;
+ glyphcolor = 197;
+ if(energy > 0) {
+ dbg_drawstr(80, 10, "Victory!");
+ glyphcolor = 200;
+ dbg_drawstr(30, 20, " Score: %d", score);
+ dbg_drawstr(30, 28, "Completed in: %lum.%lus", sec / 60, sec % 60);
+ } else {
+ dbg_drawstr(80, 10, "Game Over!");
+ }
+ glyphcolor = 198;
+ dbg_drawstr(85, 40, "Press start to exit");
+ }
+}
+
+static void victory(void)
+{
+ int sec, time_bonus = 0;
+
+ total_time = timer_msec - start_time;
+ sec = total_time / 1000;
+
+ if(sec < 60) {
+ time_bonus = 1000 + (60 - sec) * 100;
+ } else if(sec < 120) {
+ time_bonus = 250 + (60 - (sec - 60)) * 10;
+ } else if(sec < 300) {
+ time_bonus = 100;
+ }
+
+ score = energy * 250 + time_bonus;
+
+ /* TODO enter name */
+ save_score("???", score, total_time, 0);
+ save_scores();
+}
+
+static inline void xform_pixel(int *xp, int *yp)
+{
+ int32_t sa = xform_sa >> 8;
+ int32_t ca = xform_ca >> 8;
+ int x = *xp;
+ int y = *yp;
- xgl_draw(XGL_QUADS, tm_floor, sizeof tm_floor / sizeof *tm_floor);
+ *xp = (ca * x - sa * y + (120 << 8)) >> 8;
+ *yp = (sa * x + ca * y + (80 << 8)) >> 8;
}
-__attribute__((noinline, target("arm"), section(".iwram")))
-static void vblank(void)
+#define MAXBANK 0x100
+
+ARM_IWRAM
+static void gamescr_vblank(void)
{
- num_vbl++;
+ static int bank, bankdir, theta;
+ int32_t sa, ca;
+
+ if(!running) return;
+
+ vblcount++;
+
+ /* TODO: pre-arrange sprite tiles in gba-native format, so that I can just
+ * DMA them from cartridge easily
+ */
+
+ /*dma_copy32(3, (void*)(OAM_ADDR + dynspr_base * 8), oam + dynspr_base * 4, MAX_SPR * 2, 0);*/
+ dma_copy32(3, (void*)OAM_ADDR, oam, MAX_SPR * 2, 0);
+
+ if(gameover) return;
+
+ theta = -(bank << 3);
+ xform_sa = SIN(theta);
+ xform_ca = COS(theta);
+#if 0
+ xform_s = 0x100000 / (MAXBANK + (abs(bank) >> 3));
+ sa = (((xform_sa) >> 8) * xform_s) >> 12;
+ ca = (((xform_ca) >> 8) * xform_s) >> 12;
+#else
+ xform_s = (MAXBANK + (abs(bank) >> 3));
+ sa = xform_sa / xform_s;
+ ca = xform_ca / xform_s;
+#endif
+
+ REG_BG2X = -ca * 120 - sa * 80 + (120 << 8);
+ REG_BG2Y = sa * 120 - ca * 80 + (80 << 8);
+
+ REG_BG2PA = ca;
+ REG_BG2PB = sa;
+ REG_BG2PC = -sa;
+ REG_BG2PD = ca;
+
+ if((keystate & (BN_LEFT | BN_RIGHT)) == 0) {
+ if(bank) {
+ bank -= bankdir << 4;
+ }
+ } else if(keystate & BN_LEFT) {
+ bankdir = -1;
+ if(bank > -MAXBANK) bank -= 16;
+ } else if(keystate & BN_RIGHT) {
+ bankdir = 1;
+ if(bank < MAXBANK) bank += 16;
+ }
}
projects / gbajam22 / blobdiff