#include "data.h"
#include "scoredb.h"
+#define POS_MASK ((VOX_SZ << 16) - 1)
+
#define FOV 30
#define NEAR 2
#define FAR 85
#define P_RATE 250
-#define E_RATE 250
+#define E_RATE 3000
#define SHOT_TIME 50
#define ENEMY_VIS_RANGE (2 * FAR / 3)
gamescr_vblank
};
+#define ENEMY_ENERGY 4
struct enemy {
struct vox_object vobj;
short hp;
- short anm;
+ 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 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 40
+#define MAX_SPR 48
static uint16_t oam[4 * MAX_SPR];
static int dynspr_base, dynspr_count;
static int energy;
#define MAX_ENERGY 5
-#define ENEMY_ENERGY 4
-
-static int score;
+static int score, gameover;
static unsigned long total_time, start_time;
static int running;
static short vblcount;
static void *prev_iwram_top;
+static int hit_frame;
+static uint16_t color0;
static inline void xform_pixel(int *xp, int *yp);
int b = cmap[i * 3 + 2];
gba_bgpal[i] = RGB555(r, g, b);
}
+
+ color0 = gba_bgpal[0];
}
static int gamescr_start(void)
vox_init(VOX_SZ, VOX_SZ, height_pixels, color_pixels);
vox_proj(FOV, NEAR, FAR);
- vox_view(pos[0], pos[1], -40, angle);
+ pheight = vox_view(pos[0], pos[1], -40, angle);
/* setup color image palette */
setup_palette();
enemy->anm = 0xff;
enemy->hp = ENEMY_ENERGY;
enemy->last_shot = timer_msec > E_RATE ? timer_msec - E_RATE : 0;
+ enemy->shot_frame = -1;
if(++total_enemies >= MAX_ENEMIES) {
goto endspawn;
}
xform_ca = 0x10000;
xform_s = 0x100;
+ gameover = 0;
score = -1;
total_time = 0;
start_time = timer_msec;
#define TURN_SPEED 0x200
#define ELEV_SPEED 8
+#define MAX(a, b) ((a > (b) ? (a) : (b)))
+
static int update(void)
{
int32_t fwd[2], right[2];
int i, snum, ledspr;
struct enemy *enemy;
+ int did_strafe = 0;
+
+ hit_frame = 0;
update_keyb();
return -1;
}
+ if(gameover) {
+ goto skip_game_logic;
+ }
+
if(keystate) {
if(keystate & BN_LEFT) {
angle += TURN_SPEED;
right[1] = -fwd[0];
if(keystate & BN_A) {
- pos[0] += fwd[0];
- pos[1] += fwd[1];
+ 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)) {
int dy = enemies[i].vobj.py - 80;
int rad = enemies[i].vobj.scale >> 5;
- /*emuprint("rad: %d (%d,%d)", rad, enemies[i].vobj.px, enemies[i].vobj.py);*/
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();
if(horizon < 200 - ELEV_SPEED) horizon += ELEV_SPEED;
}
if(keystate & BN_RT) {
- pos[0] += right[0];
- pos[1] += right[1];
+ 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] -= right[0];
- pos[1] -= right[1];
+ 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;
}
- vox_view(pos[0], pos[1], -40, angle);
+ pheight = vox_view(pos[0], pos[1], -40, angle);
}
/* enemy logic */
enemy = enemies;
for(i=0; i<total_enemies; i++) {
- int32_t dx, dy;
-
- if(enemy->hp <= 0 || timer_msec - enemy->last_shot < E_RATE) {
+ /* only consider visible enemies which are not dead */
+ if(enemy->hp <= 0 || enemy->vobj.px < 0) {
enemy++;
continue;
}
- dx = enemy->vobj.x - pos[0];
- dy = enemy->vobj.y - pos[1];
- if(abs(dx >> 16) < ENEMY_VIS_RANGE && abs(dy >> 16) < ENEMY_VIS_RANGE) {
- if(vox_check_vis(enemy->vobj.x, enemy->vobj.y, pos[0], pos[1])) {
+ if(enemy->shot_frame >= 0) {
+ /* in the process of charging a shot */
+ if(++enemy->shot_frame >= NUM_SHOT_FRAMES - 1) {
+ if(!did_strafe) {
+ hit_frame = 1;
+ if(--energy <= 0) {
+ gameover = 1;
+ }
+ }
+ enemy->shot_frame = -1;
+ }
+ } else {
+ /* check rate of fire and start a shot if necessary */
+ if(timer_msec - enemy->last_shot >= E_RATE) {
enemy->last_shot = timer_msec;
- /* TODO shoot */
+ 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);
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;
//dma_fill16(3, framebuf, 0, 240 * 160 / 2);
fillblock_16byte(framebuf, 0, 240 * 160 / 16);
- vox_render();
+ 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) {
+ 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;
- 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);
+ 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");
}
/*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);