X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fgamescr.c;h=2744d5d5111fe47af88415005d1b8f50fd96b5c9;hb=e8d7821317677f1d0fd6ee9efa9b9ef0ef006d01;hp=3941883426087d89cd78c6c7735443ccb8664f32;hpb=c8c1b9ddb5ed3e256b086bd0db92589948163e93;p=gbajam21

diff --git a/src/gamescr.c b/src/gamescr.c
index 3941883..2744d5d 100644
--- a/src/gamescr.c
+++ b/src/gamescr.c
@@ -1,25 +1,52 @@
 #include <stdlib.h>
 #include <string.h>
 #include "gbaregs.h"
+#include "game.h"
 #include "dma.h"
 #include "data.h"
 #include "util.h"
 #include "intr.h"
+#include "input.h"
+#include "sprite.h"
 #include "debug.h"
 
-static unsigned char *tex;//[32 * 32] __attribute__((section(".iwram")));
+static void draw_tunnel(void);
+static void vblank(void);
+
+static int nframes, backbuf;
+static uint16_t *vram[] = { (uint16_t*)VRAM_LFB_FB0_ADDR, (uint16_t*)VRAM_LFB_FB1_ADDR };
+static unsigned char *tex;
+static uint16_t bnstate;
+
+#define MAX_SPR		4
+static uint16_t oam[4 * MAX_SPR];
+
+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, j, tx, ty, angle, depth, nframes, backbuf, zoffs;
-	static uint16_t *vram[] = { (uint16_t*)VRAM_LFB_FB0_ADDR, (uint16_t*)VRAM_LFB_FB1_ADDR };
-	uint16_t *cdst, *top, *bot;
+	int i;
+	int32_t scale;
+	uint16_t *cdst;
 	unsigned char *csrc;
-	uint32_t tun, *tunptr;
 
-	REG_DISPCNT = 4 | DISPCNT_BG2 | DISPCNT_FB1;
+	REG_DISPCNT = 4 | DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1;
+
+	vblperf_setcolor(0xff);
 
-	vblperf_start(0xff);
+	/* sprite setup */
+	spr_setup(16, 16, spr_game_pixels, spr_game_cmap);
+
+	wait_vblank();
+	spr_clear();
+	spr_oam_clear(oam, 0);
+	spr_oam_clear(oam, 1);
+	spr_oam_clear(oam, 2);
+	spr_oam_clear(oam, 3);
 
 	cdst = (uint16_t*)CRAM_BG_ADDR;
 	csrc = tuncross_cmap;
@@ -34,35 +61,108 @@ void gamescr(void)
 	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);
+	screen_vblank = vblank;
+	unmask(INTR_VBLANK);
+
 	nframes = 0;
 	for(;;) {
 		backbuf = ++nframes & 1;
 
-		zoffs = nframes << 1;
+		bnstate = ~REG_KEYINPUT;
+
+		draw_tunnel();
+
+		vblperf_end();
+		wait_vblank();
+		present(backbuf);
+		vblperf_begin();
+	}
+}
+
+__attribute__((noinline, target("arm"), section(".iwram")))
+static void draw_tunnel(void)
+{
+	int i, j, tx, ty, angle, depth, zoffs, uoffs, flip, tunturn;
+	static int tunsweep;
+	uint16_t pptop, ppbot;
+	uint16_t *top, *bot;
+	uint32_t tun, *tunptr;
+
+	//tunsweep = SIN(nframes) >> 4;
+
+	if((bnstate & BN_RT) && tunsweep > -31) tunsweep--;
+	if((bnstate & BN_LT) && tunsweep < 31) tunsweep++;
+
+	flip = tunsweep < 0;
+	tunturn = abs(tunsweep) & 0x1f;
 
-		top = vram[backbuf];
-		bot = vram[backbuf] + 159 * 240 / 2;
-		tunptr = tunmap;
+	zoffs = nframes;
+
+	uoffs = flip ? -nframes : nframes;
+
+	top = vram[backbuf];
+	bot = vram[backbuf] + 159 * 240 / 2;
+	tunptr = tunmap + tunturn * 9600;
+
+	if(flip) {
+		tunptr += 240/2;
 		for(i=0; i<80; i++) {
 			for(j=0; j<240/2; j++) {
-				uint16_t pptop, ppbot;
+				tun = *--tunptr;
+				tun = (tun >> 16) | (tun << 16);
 
+				angle = tun & 0xff;
+				depth = (tun >> 8) & 0xff;
+				tx = ~((angle >> 1) - uoffs) & 0x1f;
+				ty = ((depth >> 1) + zoffs) & 0x1f;
+				pptop = tex[(ty << 5) + tx];
+				tx = ((angle >> 1) + uoffs) & 0x1f;
+				ppbot = tex[(ty << 5) + tx];
+
+				angle = (tun >> 16) & 0xff;
+				depth = (tun >> 24) & 0xff;
+				tx = ~((angle >> 1) - uoffs) & 0x1f;
+				ty = ((depth >> 1) + zoffs) & 0x1f;
+				pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
+				tx = ((angle >> 1) + uoffs) & 0x1f;
+				ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
+
+				*top++ = pptop;
+				*bot++ = ppbot;
+			}
+			bot -= 240;
+			tunptr += 240;
+		}
+	} else {
+		for(i=0; i<80; i++) {
+			for(j=0; j<240/2; j++) {
 				tun = *tunptr++;
 
 				angle = tun & 0xff;
 				depth = (tun >> 8) & 0xff;
-				tx = ((angle >> 1) + zoffs) & 0x1f;
+				tx = ((angle >> 1) - uoffs) & 0x1f;
 				ty = ((depth >> 1) + zoffs) & 0x1f;
 				pptop = tex[(ty << 5) + tx];
-				tx = ((angle >> 1) - zoffs) & 0x1f;
+				tx = ~((angle >> 1) + uoffs) & 0x1f;
 				ppbot = tex[(ty << 5) + tx];
 
 				angle = (tun >> 16) & 0xff;
 				depth = (tun >> 24) & 0xff;
-				tx = ((angle >> 1) + zoffs) & 0x1f;
+				tx = ((angle >> 1) - uoffs) & 0x1f;
 				ty = ((depth >> 1) + zoffs) & 0x1f;
 				pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
-				tx = ((angle >> 1) - zoffs) & 0x1f;
+				tx = ~((angle >> 1) + uoffs) & 0x1f;
 				ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
 
 				*top++ = pptop;
@@ -70,10 +170,48 @@ void gamescr(void)
 			}
 			bot -= 240;
 		}
+	}
+}
 
-		vblperf_end();
-		wait_vblank();
-		present(backbuf);
-		vblperf_begin();
+__attribute__((noinline, target("arm"), section(".iwram")))
+static void vblank(void)
+{
+	uint16_t bnstate;
+	int16_t mat[4];
+	static short gate_speed;
+
+	bnstate = ~REG_KEYINPUT;
+	if(bnstate & BN_DPAD) {
+		if(gate_speed < 5) {
+			gate_speed++;
+		}
+
+		if(bnstate & BN_LEFT) x -= gate_speed;
+		if(bnstate & BN_RIGHT) x += gate_speed;
+		if(bnstate & BN_UP) y -= gate_speed;
+		if(bnstate & BN_DOWN) y += gate_speed;
+
+		if(x < 0) x = 0;
+		if(x > 239) x = 239;
+		if(y < 0) y = 0;
+		if(y > 159) y = 159;
+	} else {
+		gate_speed = 0;
 	}
+
+	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);
+	mat[1] = -SIN(rot);
+	mat[2] = SIN(rot);
+	mat[3] = COS(rot);
+	spr_transform(oam, 0, mat);
+
+
+	dma_copy16(3, (void*)OAM_ADDR, oam, sizeof oam / 2, 0);
 }