bullets are go

res/resources.res

@@ -5,3 +5,16 @@ IMAGE bgCeil1 "bg/ceil1.png" FAST
 IMAGE bgFloor1 "bg/floor1.png" FAST
 
 SPRITE nitori "player/nitori.png" 4 4 FAST
+
+SPRITE smallRedBullet "bullets/smallred.png" 1 1 FAST 5
+SPRITE smallBlueBullet "bullets/smallblue.png" 1 1 FAST 5
+SPRITE smallGreenBullet "bullets/smallgreen.png" 1 1 FAST 5
+SPRITE smallPinkBullet "bullets/smallpink.png" 1 1 FAST 5
+SPRITE smallYellowBullet "bullets/smallyellow.png" 1 1 FAST 5
+SPRITE smallWhiteBullet "bullets/smallwhite.png" 1 1 FAST 5
+SPRITE bigRedBullet "bullets/bigred.png" 2 2 FAST 5
+SPRITE bigBlueBullet "bullets/bigblue.png" 2 2 FAST 5
+SPRITE bigGreenBullet "bullets/biggreen.png" 2 2 FAST 5
+SPRITE bigPinkBullet "bullets/bigpink.png" 2 2 FAST 5
+SPRITE bigYellowBullet "bullets/bigyellow.png" 2 2 FAST 5
+SPRITE bigWhiteBullet "bullets/bigwhite.png" 2 2 FAST 5

src/bullets.h

@@ -0,0 +1,124 @@
+// bullets
+
+#define BULLET_COUNT 64
+
+struct bullet {
+	bool active, player;
+	fix16 speed;
+	fix32 dist;
+	Vect2D_f16 pos, vel;
+	s16 angle, clock;
+	Sprite* image;
+	bool dead, big;
+	void (*updater)(s16);
+	bool bools[COUNT_INT];
+	s16 ints[COUNT_INT];
+	fix16 fixes[COUNT_INT];
+};
+struct bullet bullets[BULLET_COUNT];
+
+
+// lifecycle
+
+#define BULLET_OFF 4
+#define BULLET_OFF_BIG 8
+
+#define BULLET_DIST FIX32(4)
+#define BULLET_DIST_BIG FIX32(8)
+
+void spawnBullet(struct bulletSpawner spawner, void(*updater)){
+	s16 i = -1;
+	for(s16 j = 0; j < BULLET_COUNT; j++) if(!bullets[j].active && i == -1) i = j;
+	if(i > -1 && (spawner.player || (player.invincibleClock < INVINCIBLE_LIMIT))){
+		bullets[i].active = TRUE;
+		bullets[i].pos.x = spawner.x;
+		bullets[i].pos.y = spawner.y;
+		bullets[i].dist = fix16ToFix32(spawner.big ? BULLET_DIST_BIG : BULLET_DIST);
+		bullets[i].speed = spawner.speed;
+		bullets[i].angle = spawner.angle;
+		bullets[i].player = spawner.player;
+		bullets[i].clock = 0;
+		bullets[i].dead = FALSE;
+		bullets[i].big = spawner.big;
+		for(u8 j = 0; j < COUNT_INT; j++){
+			bullets[i].bools[j] = spawner.bools[j];
+			bullets[i].ints[j] = spawner.ints[j];
+			bullets[i].fixes[j] = spawner.fixes[j];
+		}
+		if(spawner.vel.x && spawner.vel.y){
+			bullets[i].vel.x = spawner.vel.x;
+			bullets[i].vel.y = spawner.vel.y;
+			if(bullets[i].vel.x > 0 && !bullets[i].player) bullets[i].vel.x = -bullets[i].vel.x;
+		} else {
+			bullets[i].vel.x = fix16Mul(cosFix16(spawner.angle), spawner.speed);
+			bullets[i].vel.y = fix16Mul(sinFix16(spawner.angle), spawner.speed);
+		}
+		bullets[i].updater = updater;
+		bullets[i].image = SPR_addSprite(spawner.image,
+			fix16ToInt(fix16Sub(bullets[i].pos.x, spawner.big ? BULLET_OFF_BIG : BULLET_OFF)),
+			fix16ToInt(fix16Sub(bullets[i].pos.y,spawner.big ? BULLET_OFF_BIG : BULLET_OFF)),
+			TILE_ATTR(PAL1, 0, 0, 0));
+		// SPR_setDepth(bullets[i].image, 4);
+	}
+}
+
+static void killBullet(s16 i){
+	bullets[i].active = FALSE;
+	SPR_releaseSprite(bullets[i].image);
+	if(bullets[i].dead){
+		// spawnExplosion(bullets[i].pos.x, bullets[i].pos.y, 0);
+		bullets[i].dead = FALSE;
+	}
+}
+
+void updateBulletVel(s16 i){
+	bullets[i].vel.x = fix16Mul(cosFix16(bullets[i].angle), bullets[i].speed);
+	bullets[i].vel.y = fix16Mul(sinFix16(bullets[i].angle), bullets[i].speed);
+}
+
+
+// collision
+
+#define BULLET_LIMIT FIX16(-BULLET_OFF)
+#define BULLET_LIMIT_W FIX16(GAME_W + BULLET_OFF)
+#define BULLET_LIMIT_H FIX16(GAME_H + BULLET_OFF)
+
+#define BULLET_LIMIT_BIG FIX16(-BULLET_OFF_BIG)
+#define BULLET_LIMIT_W_BIG FIX16(GAME_W + BULLET_OFF_BIG)
+#define BULLET_LIMIT_H_BIG FIX16(GAME_H + BULLET_OFF_BIG)
+
+static void collideBullet(s16 i){
+	if(bullets[i].pos.x < (bullets[i].big ? BULLET_LIMIT_BIG : BULLET_LIMIT) ||
+		bullets[i].pos.x > (bullets[i].big ? BULLET_LIMIT_W_BIG : BULLET_LIMIT_W) ||
+		bullets[i].pos.y < (bullets[i].big ? BULLET_LIMIT_BIG : BULLET_LIMIT) ||
+		bullets[i].pos.y > (bullets[i].big ? BULLET_LIMIT_H_BIG : BULLET_LIMIT_H)){
+		killBullet(i);
+	}
+}
+
+
+// loop
+
+static void updateBullet(s16 i){
+	bullets[i].pos.x = fix16Add(bullets[i].pos.x, bullets[i].vel.x);
+	bullets[i].pos.y = fix16Add(bullets[i].pos.y, bullets[i].vel.y);
+	bullets[i].updater(i);
+	collideBullet(i);
+	SPR_setPosition(
+		bullets[i].image,
+		fix16ToInt(fix16Sub(bullets[i].pos.x, bullets[i].big ? BULLET_OFF_BIG : BULLET_OFF)),
+		fix16ToInt(fix16Sub(bullets[i].pos.y, bullets[i].big ? BULLET_OFF_BIG : BULLET_OFF)));
+	bullets[i].clock++;
+}
+
+void updateBullets(){
+	if(killBullets){
+		for(s16 i = 0; i < BULLET_COUNT; i++) if(bullets[i].active){
+			if(i % 4 == 0) bullets[i].dead = TRUE;
+			killBullet(i);
+		}
+		killBullets = FALSE;
+	} else {
+		for(s16 i = 0; i < BULLET_COUNT; i++) if(bullets[i].active) updateBullet(i);
+	}
+}

src/global.h

@@ -19,8 +19,27 @@
 #define GAME_Y 0
 
 #define CLOCK_LIMIT 32000
+#define COUNT_INT 8
+
+bool killBullets;
 
 s16 clock;
 
 u32 score,
 	highScore;
+
+void EMPTY(s16 i){}
+
+
+// structs
+
+struct bulletSpawner {
+	fix16 x, y, speed;
+	Vect2D_f16 vel;
+	s16 angle;
+	Sprite* image;
+	bool big, player;
+	bool bools[COUNT_INT];
+	s16 ints[COUNT_INT];
+	fix16 fixes[COUNT_INT];
+};

src/main.c

@@ -7,6 +7,7 @@
 #include "controls.h"
 #include "background.h"
 #include "player.h"
+#include "bullets.h"
 #include "chrome.h"
 
 // game loop
@@ -30,6 +31,7 @@ static void loadGame(){
 
 static void updateGame(){
 	updatePlayer();
+	updateBullets();
 	updateBg();
 	updateChrome();
 	clock++;

src/player.h

@@ -4,10 +4,13 @@
 #define PLAYER_INIT_X FIX16(40)
 #define PLAYER_INIT_Y FIX16(GAME_H / 2)
 
+#define INVINCIBLE_LIMIT 60 * 4
+#define SHOT_INTERVAL 15
+
 struct playerStruct {
 	Vect2D_f16 pos, vel;
 	Sprite* image;
-	s16 clock;
+	s16 clock, invincibleClock, shotClock;
 };
 struct playerStruct player;
 
@@ -17,6 +20,7 @@ struct playerStruct player;
 static void spawnPlayer(){
 	player.pos.x = PLAYER_INIT_X;
 	player.pos.y = PLAYER_INIT_Y;
+	player.shotClock = SHOT_INTERVAL;
 	player.image = SPR_addSprite(&nitori,
 		fix16ToInt(fix16Sub(player.pos.x, PLAYER_OFF)),
 		fix16ToInt(fix16Sub(player.pos.y, PLAYER_OFF)),
@@ -40,8 +44,8 @@ static void checkPlayerBounds(){
 
 // movement
 
-#define PLAYER_SPEED FIX16(2.25)
-#define PLAYER_SPEED_NORM FIX16(2.25 * 0.707)
+#define PLAYER_SPEED FIX16(2.5)
+#define PLAYER_SPEED_NORM FIX16(2.5 * 0.707)
 
 s16 playerFrame;
 
@@ -74,6 +78,34 @@ static void movePlayer(){
 }
 
 
+// shooting
+
+// shoot
+
+#define PLAYER_BULLET_SPEED FIX16(16)
+#define PLAYER_BULLET_ANGLE 0
+
+static void spawnPlayerBullet(){
+	struct bulletSpawner spawner = {
+		.x = player.pos.x,
+		.y = player.pos.y,
+		.image = &smallWhiteBullet,
+		.speed = PLAYER_BULLET_SPEED,
+		.angle = PLAYER_BULLET_ANGLE,
+		.player = TRUE
+	};
+	spawnBullet(spawner, EMPTY);
+}
+
+
+static void shotPlayer(){
+	if(player.shotClock >= SHOT_INTERVAL && ctrl.a) player.shotClock = 0;
+	if(player.shotClock == 0) spawnPlayerBullet();
+	player.shotClock++;
+	if(player.shotClock >= CLOCK_LIMIT) player.shotClock = SHOT_INTERVAL;
+}
+
+
 // loop
 
 void loadPlayer(){
@@ -82,6 +114,7 @@ void loadPlayer(){
 
 void updatePlayer(){
 	movePlayer();
+	shotPlayer();
 	SPR_setPosition(player.image,
 		fix16ToInt(fix16Sub(player.pos.x, PLAYER_OFF)),
 		fix16ToInt(fix16Sub(player.pos.y, PLAYER_OFF)));