X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fgamescr.c;h=cc089f22a8f0326272de7b0c67f56657b61b4287;hb=53c0ee3332822465be7dcf923ca3c6445076b555;hp=3b15a4a50f0f508658088c1ffceec8af8c25baae;hpb=41765ea063cbab26ae05e7259ffc8a7c85db2f5d;p=gbajam22

diff --git a/src/gamescr.c b/src/gamescr.c
index 3b15a4a..cc089f2 100644
--- a/src/gamescr.c
+++ b/src/gamescr.c
@@ -6,144 +6,400 @@
 #include "util.h"
 #include "intr.h"
 #include "input.h"
+#include "gba.h"
 #include "sprite.h"
 #include "debug.h"
-#include "level.h"
-#include "xgl.h"
-#include "polyfill.h"
+#include "voxscape.h"
+#include "data.h"
+
+#define FOV		30
+#define NEAR	2
+#define FAR		85
+
+static int gamescr_start(void);
+static void gamescr_stop(void);
+static void gamescr_frame(void);
+static void gamescr_vblank(void);
 
 static void 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 cube[] __attribute__((section(".rodata"))) = {
-	/* front */
-	{-0x10000, -0x10000, -0x10000,	0, 0, -0x10000,	255},
-	{0x10000, -0x10000, -0x10000,	0, 0, -0x10000,	255},
-	{0x10000, 0x10000, -0x10000,	0, 0, -0x10000,	255},
-	{-0x10000, 0x10000, -0x10000,	0, 0, -0x10000,	255},
-	/* right */
-	{0x10000, -0x10000, -0x10000,	0x10000, 0, 0,	128},
-	{0x10000, -0x10000, 0x10000,	0x10000, 0, 0,	128},
-	{0x10000, 0x10000, 0x10000,		0x10000, 0, 0,	128},
-	{0x10000, 0x10000, -0x10000,	0x10000, 0, 0,	128},
-	/* back */
-	{0x10000, -0x10000, 0x10000,	0, 0, 0x10000,	200},
-	{-0x10000, -0x10000, 0x10000,	0, 0, 0x10000,	200},
-	{-0x10000, 0x10000, 0x10000,	0, 0, 0x10000,	200},
-	{0x10000, 0x10000, 0x10000,		0, 0, 0x10000,	200},
-	/* left */
-	{-0x10000, -0x10000, 0x10000,	-0x10000, 0, 0,	192},
-	{-0x10000, -0x10000, -0x10000,	-0x10000, 0, 0,	192},
-	{-0x10000, 0x10000, -0x10000,	-0x10000, 0, 0,	192},
-	{-0x10000, 0x10000, 0x10000,	-0x10000, 0, 0,	192},
-	/* top */
-	{-0x10000, 0x10000, -0x10000,	0, 0x10000, 0,	150},
-	{0x10000, 0x10000, -0x10000,	0, 0x10000, 0,	150},
-	{0x10000, 0x10000, 0x10000,		0, 0x10000, 0,	150},
-	{-0x10000, 0x10000, 0x10000,	0, 0x10000, 0,	150},
-	/* bottom */
-	{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 struct screen gamescr = {
+	"game",
+	gamescr_start,
+	gamescr_stop,
+	gamescr_frame,
+	gamescr_vblank
+};
+
+struct enemy {
+	struct vox_object vobj;
+	short hp;
+	short anm;
+	int last_fire;
 };
+#define ENEMY_VALID(e)	((e)->anm != 0)
+
+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;
+
+#define COLOR_HORIZON	192
+#define COLOR_ZENITH	255
 
+#define MAX_SPR		32
+static uint16_t oam[4 * MAX_SPR];
+static int dynspr_base, dynspr_count;
 
-static struct level *lvl;
 
-static int32_t cam_theta, cam_phi;
+#define MAX_ENEMIES		(255 - CMAP_SPAWN0)
+struct enemy enemies[MAX_ENEMIES];
+int num_enemies, total_enemies;
+static int energy;
+#define MAX_ENERGY	5
 
-void gamescr(void)
+
+#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;
+
+
+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 int gamescr_start(void)
+{
+	int i, j, sidx;
+	uint8_t *cptr;
+	struct enemy *enemy;
 
-	vblperf_setcolor(0xff);
+	prev_iwram_top = iwram_sbrk(0);
 
-	lvl = init_level(testlvl);
+	gba_setmode(4, DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1);
 
-	xgl_init();
+	vblperf_setcolor(0);
 
-	select_input(BN_DPAD);
+	pos[0] = pos[1] = VOX_SZ << 15;
 
-	mask(INTR_VBLANK);
-	screen_vblank = vblank;
-	unmask(INTR_VBLANK);
+	vox_init(VOX_SZ, VOX_SZ, height_pixels, color_pixels);
+	vox_proj(FOV, NEAR, FAR);
+	vox_view(pos[0], pos[1], -40, angle);
+
+	/* setup color image palette */
+	for(i=0; i<256; i++) {
+		int r = color_cmap[i * 3];
+		int g = color_cmap[i * 3 + 1];
+		int b = color_cmap[i * 3 + 2];
+		gba_bgpal[i] = (((uint16_t)b << 7) & 0x7c00) | (((uint16_t)g << 2) & 0x3e0) | (((uint16_t)r >> 3) & 0x1f);
+	}
+
+	spr_setup(16, 16, spr_game_pixels, 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_enemies = total_enemies = 0;
+	energy = 5;
+
+	srand(0);
+	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 = 2;
+				enemy->last_fire = 0;
+				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);
 
 	nframes = 0;
-	for(;;) {
-		backbuf = ++nframes & 1;
-		fb = (unsigned char*)vram[backbuf];
+	return 0;
+}
 
-		polyfill_framebuffer(fb, 240, 160);
-		fillblock_16byte(fb, 0, 240 * 160 / 16);
+static void gamescr_stop(void)
+{
+	iwram_brk(prev_iwram_top);
+}
 
-		update();
-		draw();
+static void gamescr_frame(void)
+{
+	backbuf = ++nframes & 1;
+	framebuf = vram[backbuf];
 
-		vblperf_end();
-		wait_vblank();
-		present(backbuf);
-		vblperf_begin();
+	vox_framebuf(240, 160, framebuf, horizon);
+
+	update();
+	draw();
+
+	vblperf_end();
+	wait_vblank();
+	present(backbuf);
+
+	if(!(nframes & 15)) {
+		emuprint("vbl: %d", vblperf_count);
 	}
+#ifdef VBLBAR
+	vblperf_begin();
+#else
+	vblperf_count = 0;
+#endif
 }
 
+#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
+
 static void update(void)
 {
-	uint16_t bnstate;
+	int32_t fwd[2], right[2];
+	int i, snum, ledspr;
+	struct enemy *enemy;
 
-	bnstate = get_input();
+	update_keyb();
 
-	if(bnstate & KEY_UP) {
-		cam_phi += 0x2000;
-		if(cam_phi > X_HPI) cam_phi = X_HPI;
+	if(KEYPRESS(BN_START)) {
+		/* TODO pause menu */
+		change_screen(find_screen("menu"));
 	}
-	if(bnstate & KEY_DOWN) {
-		cam_phi -= 0x2000;
-		if(cam_phi < -X_HPI) cam_phi = -X_HPI;
+
+	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] += fwd[0];
+			pos[1] += fwd[1];
+		}
+		if(keystate & BN_B) {
+			pos[0] -= fwd[0];
+			pos[1] -= fwd[1];
+		}
+		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] += right[0];
+			pos[1] += right[1];
+		}
+		if(keystate & BN_LT) {
+			pos[0] -= right[0];
+			pos[1] -= right[1];
+		}
+
+		vox_view(pos[0], pos[1], -40, angle);
+	}
+
+	snum = 0;
+	/* turrets number */
+	spr_oam(oam, dynspr_base + snum++, numspr[num_enemies][0], 200, 144, SPR_VRECT | SPR_256COL);
+	spr_oam(oam, dynspr_base + snum++, numspr[num_enemies][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);
 	}
-	if(bnstate & KEY_LEFT) {
-		cam_theta += 0x2000;
-		if(cam_theta > X_2PI) cam_theta -= X_2PI;
+	/* 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;
+		unsigned int flags;
+		int16_t mat[4];
+		int32_t sa, ca, scale;
+
+		if(enemy->vobj.px >= 0) {
+			flags = SPR_SZ32 | SPR_DBLSZ | SPR_256COL | SPR_ROTSCL | SPR_ROTSCL_SEL(0);
+			if(enemies->hp > 0) {
+				anm = (enemies->anm + (vblcount >> 3)) & 0xf;
+				sid = SPRID_ENEMY0 + ((anm & 7) << 2);
+				flags |= SPR_VRECT;
+			} else {
+				anm = 0;
+				sid = SPRID_HUSK;
+			}
+
+			px = enemy->vobj.px - 120;
+			py = enemy->vobj.py - 80;
+			xform_pixel(&px, &py);
+
+			spr_oam(oam, dynspr_base + snum++, sid, px - 20, py - 32, 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++;
 	}
-	if(bnstate & KEY_RIGHT) {
-		cam_theta -= 0x2000;
-		if(cam_theta < X_2PI) cam_theta += X_2PI;
+	for(i=snum; i<dynspr_count; i++) {
+		spr_oam_clear(oam, dynspr_base + i);
 	}
+
+	mask(INTR_VBLANK);
+	dynspr_count = snum;
+	unmask(INTR_VBLANK);
 }
 
 static void draw(void)
 {
-	xgl_load_identity();
-	//xgl_translate(0, -0x50000, 0);
-	xgl_translate(0, 0, 0x80000);
-	xgl_rotate_x(cam_phi);
-	xgl_rotate_y(cam_theta);
+	//dma_fill16(3, framebuf, 0, 240 * 160 / 2);
+	fillblock_16byte(framebuf, 0, 240 * 160 / 16);
 
-	xgl_draw(XGL_QUADS, cube, sizeof cube / sizeof *cube);
+	vox_render();
+	//vox_sky_grad(COLOR_HORIZON, COLOR_ZENITH);
+	//vox_sky_solid(COLOR_ZENITH);
 }
 
-__attribute__((noinline, target("arm"), section(".iwram")))
-static void vblank(void)
+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;
+
+	*xp = (ca * x - sa * y + (120 << 8)) >> 8;
+	*yp = (sa * x + ca * y + (80 << 8)) >> 8;
+}
+
+#define MAXBANK		0x100
+
+ARM_IWRAM
+static void gamescr_vblank(void)
 {
-	num_vbl++;
+	static int bank, bankdir, theta;
+	int32_t sa, ca;
+
+	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);
+
+	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;
+	}
 }