static short x = 120, y = 80;
static unsigned char rot;
+static int32_t tunrot;
+static int32_t tunmat[4], tunx, tuny;
+
void gamescr(void)
{
int i;
+ int32_t scale;
uint16_t *cdst;
unsigned char *csrc;
tex = iwram_sbrk(32 * 32);
memcpy(tex, tuncross_pixels, 32 * 32);
+ scale = 0x100;//230;
+ REG_BG2PA = scale;
+ REG_BG2PB = 0;
+ REG_BG2PC = 0;
+ REG_BG2PD = scale;
+ REG_BG2X = (120 << 8) - scale * 120;
+ REG_BG2Y = (80 << 8) - scale * 80;
+
/*select_input(BN_DPAD);*/
mask(INTR_VBLANK);
}
}
-static int32_t bgmat[4];
-static int32_t bgx, bgy;
-
__attribute__((noinline, target("arm"), section(".iwram")))
static void draw_tunnel(void)
{
- static short uoffs;
- int i, j, tx, ty, angle, depth, zoffs;
- uint16_t pptop, ppbot;
- uint16_t *top, *bot;
- uint32_t tun, *tunptr;
+ int i, j, tx, ty, angle, depth, zoffs, uoffs;
+ uint16_t pptop;
+ uint16_t *top;
+ uint16_t tun;
+ int32_t startx, starty;
+ uint16_t *tmap = (uint16_t*)tunmap;
zoffs = nframes;
- if(bnstate & BN_LT) uoffs++;
- if(bnstate & BN_RT) uoffs--;
+ /*
+ if(bnstate & KEY_LT) tunrot++;
+ if(bnstate & KEY_RT) tunrot--;
+ */
+ tunrot = nframes;
+
+ tunmat[0] = COS(tunrot);
+ tunmat[1] = -SIN(tunrot);
+ tunmat[2] = SIN(tunrot);
+ tunmat[3] = COS(tunrot);
+ tunx = (128 << 8) - tunmat[0] * 120 + tunmat[1] * -80;
+ tuny = (128 << 8) - tunmat[2] * 120 + tunmat[3] * -80;
- bgmat[0] = COS(uoffs) << 1;
- bgmat[1] = -SIN(uoffs) << 1;
- bgmat[2] = SIN(uoffs) << 1;
- bgmat[3] = COS(uoffs) << 1;
- bgx = (120 << 8) - bgmat[0] * 120 + bgmat[1] * -80;
- bgy = (80 << 8) - bgmat[2] * 120 + bgmat[3] * -80;
+ uoffs = tunrot;
top = vram[backbuf];
- bot = vram[backbuf] + 159 * 240 / 2;
- tunptr = tunmap;
- for(i=0; i<80; i++) {
-#ifdef VBLBAR
- top++;
- bot++;
- tunptr++;
-
- for(j=1; j<240/2; j++) {
-#else
+ for(i=0; i<160; i++) {
+ startx = tunx;
+ starty = tuny;
for(j=0; j<240/2; j++) {
-#endif
- tun = *tunptr++;
+ tx = (tunx >> 8) & 0xff;
+ ty = (tuny >> 8) & 0xff;
+ tun = tmap[(ty << 8) + tx];
+
+ tunx += tunmat[0];
+ tuny += tunmat[2];
angle = tun & 0xff;
depth = (tun >> 8) & 0xff;
-// tx = ((angle >> 1) - uoffs) & 0x1f;
- tx = (angle >> 1) & 0x1f;
+ tx = ((angle >> 1) - uoffs) & 0x1f;
ty = ((depth >> 1) + zoffs) & 0x1f;
pptop = tex[(ty << 5) + tx];
-// tx = ~((angle >> 1) + uoffs) & 0x1f;
- tx = ~(angle >> 1) & 0x1f;
- ppbot = tex[(ty << 5) + tx];
-
- angle = (tun >> 16) & 0xff;
- depth = (tun >> 24) & 0xff;
-// tx = ((angle >> 1) - uoffs) & 0x1f;
- tx = (angle >> 1) & 0x1f;
+
+ tx = (tunx >> 8) & 0xff;
+ ty = (tuny >> 8) & 0xff;
+ tun = tmap[(ty << 8) + tx];
+
+ tunx += tunmat[0];
+ tuny += tunmat[2];
+
+ angle = tun & 0xff;
+ depth = (tun >> 8) & 0xff;
+ tx = ((angle >> 1) - uoffs) & 0x1f;
ty = ((depth >> 1) + zoffs) & 0x1f;
pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
-// tx = ~((angle >> 1) + uoffs) & 0x1f;
- tx = ~(angle >> 1) & 0x1f;
- ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
*top++ = pptop;
- *bot++ = ppbot;
}
- bot -= 240;
+
+ tunx = startx + tunmat[1];
+ tuny = starty + tunmat[3];
}
}
int16_t mat[4];
static short gate_speed;
- REG_BG2PA = bgmat[0];
- REG_BG2PB = bgmat[1];
- REG_BG2PC = bgmat[2];
- REG_BG2PD = bgmat[3];
- REG_BG2X = bgx;
- REG_BG2Y = bgy;
-
bnstate = ~REG_KEYINPUT;
if(bnstate & BN_DPAD) {
if(gate_speed < 5) {
if(bnstate & BN_A) rot -= 2;
if(bnstate & BN_B) rot += 2;
+
spr_oam(oam, 0, 512 + 256, x - 64, y - 64, SPR_256COL | SPR_SZ64 | SPR_DBLSZ |
SPR_ROTSCL | SPR_ROTSCL_SEL(0));
- mat[0] = COS(rot) << 1;
- mat[1] = -SIN(rot) << 1;
- mat[2] = SIN(rot) << 1;
- mat[3] = COS(rot) << 1;
+ mat[0] = COS(rot);
+ mat[1] = -SIN(rot);
+ mat[2] = SIN(rot);
+ mat[3] = COS(rot);
spr_transform(oam, 0, mat);