start enemy work

res/resources.res

@@ -18,6 +18,8 @@ IMAGE rock1rt "fg/rock1rt.png" FAST
 
 SPRITE nitori "player/nitori.png" 4 4 FAST
 
+SPRITE fairy1 "enemies/fairy1.png" 6 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

src/enemies.h

@@ -0,0 +1,96 @@
+// enemies
+
+// lifecycle
+
+void spawnEnemy(struct enemySpawner spawner, void(*updater), void(*suicide)){
+	s16 i = -1;
+	for(s16 j = 0; j < ENEMY_COUNT; j++) if(!enemies[j].active && i == -1) i = j;
+	if(i > -1){
+		enemies[i].active = TRUE;
+		enemies[i].off.x = FIX16(spawner.offX);
+		enemies[i].off.y = FIX16(spawner.offY);
+		enemies[i].pos.x = FIX16(spawner.x);
+		enemies[i].pos.y = FIX16(spawner.y);
+		enemies[i].dist = intToFix32(spawner.offX - 2);
+		enemies[i].speed = spawner.speed;
+		enemies[i].angle = spawner.angle;
+		enemies[i].boss = spawner.boss;
+		enemies[i].shotClock = 0;
+		enemies[i].dead = FALSE;
+		enemies[i].health = spawner.health ? spawner.health : 1;
+		if(spawner.vel.x && spawner.vel.y){
+			enemies[i].vel.x = spawner.vel.x;
+			enemies[i].vel.y = spawner.vel.y;
+		} else {
+			enemies[i].vel.x = fix16Mul(cosFix16(spawner.angle), spawner.speed);
+			enemies[i].vel.y = fix16Mul(sinFix16(spawner.angle), spawner.speed);
+		}
+		for(s16 j = 0; j < COUNT_INT; j++){
+			enemies[i].bools[j] = spawner.bools[j];
+			enemies[i].ints[j] = spawner.ints[j];
+			enemies[i].fixes[j] = spawner.fixes[j];
+		}
+		enemies[i].updater = updater;
+		enemies[i].suicide = suicide;
+		enemies[i].clock = 0;
+		enemies[i].seen = FALSE;
+		enemies[i].image = SPR_addSprite(spawner.image,
+			fix16ToInt(fix16Sub(enemies[i].pos.x, enemies[i].off.x)),
+			fix16ToInt(fix16Sub(enemies[i].pos.y, enemies[i].off.y)),
+			TILE_ATTR(PAL1, 0, 0, 0));
+		SPR_setAnim(enemies[i].image, spawner.anim ? spawner.anim : 0);
+		SPR_setFrame(enemies[i].image, spawner.frame ? spawner.frame : 0);
+		SPR_setDepth(enemies[i].image, 5);
+		SPR_setVisibility(enemies[i].image, HIDDEN);
+	}
+}
+
+void killEnemy(s16 i){
+	enemies[i].dead = TRUE;
+}
+
+
+// helpers
+
+void updateEnemyVel(s16 i){
+	enemies[i].vel.x = fix16Mul(cosFix16(enemies[i].angle), enemies[i].speed);
+	enemies[i].vel.y = fix16Mul(sinFix16(enemies[i].angle), enemies[i].speed);
+}
+
+
+// loop
+
+static void updateEnemy(s16 i){
+	if(enemies[i].seen && (enemies[i].pos.x < fix16Sub(0, enemies[i].off.x) ||
+		enemies[i].pos.x > fix16Add(FIX16(GAME_W), enemies[i].off.x) ||
+		enemies[i].pos.y < fix16Sub(0, enemies[i].off.y) ||
+		enemies[i].pos.y > fix16Add(FIX16(GAME_H), enemies[i].off.y))){
+		killEnemy(i);
+		enemies[i].suicide(i);
+	} else {
+		if(!enemies[i].seen && enemies[i].pos.x <= fix16Add(FIX16(GAME_W), enemies[i].off.x)){
+			enemies[i].seen = TRUE;
+			SPR_setVisibility(enemies[i].image, VISIBLE);
+		}
+		enemies[i].pos.x = fix16Add(enemies[i].pos.x, enemies[i].vel.x);
+		enemies[i].pos.y = fix16Add(enemies[i].pos.y, enemies[i].vel.y);
+		if(enemies[i].seen){
+			enemies[i].updater(i);
+			if(enemies[i].boss) bossHealth = enemies[i].health;
+			// collideEnemy(i);
+			enemies[i].clock++;
+			if(enemies[i].clock >= CLOCK_LIMIT) enemies[i].clock -= CLOCK_LIMIT;
+			SPR_setPosition(enemies[i].image,
+				fix16ToInt(fix16Sub(enemies[i].pos.x, enemies[i].off.x)),
+				fix16ToInt(fix16Sub(enemies[i].pos.y, enemies[i].off.y)));
+		}
+	}
+	if(enemies[i].dead){
+		enemies[i].active = FALSE;
+		SPR_releaseSprite(enemies[i].image);
+	}
+}
+
+void updateEnemies(){
+	for(s16 i = 0; i < ENEMY_COUNT; i++) if(enemies[i].active) updateEnemy(i);
+}

src/foreground.h

@@ -1,7 +1,7 @@
 // foreground
 
 #define FG_I 576
-#define FG_W GAME_W_T + 30
+#define FG_W 64
 #define OBSTACLE_COUNT 8
 
 #define FG_SPEED FIX16(2)
@@ -38,33 +38,28 @@ static void drawFg(){
 #define OBS_TOP_Y FIX16(56)
 #define OBS_BOTTOM_Y FIX16(160)
 
-s16 fgPos;
+s16 fgPos, obsX;
 
 static void spawnObstacle(bool top){
 	s16 i = -1;
 	for(s16 j = 0; j < OBSTACLE_COUNT; j++) if(!obstacles[j].active && i == -1) i = j;
 	if(i > -1){
+		// obsX = OBS_X;
+		obsX = OBS_X + (fgPos != 0 ? (-fgPos / 8) : 0);
 		obstacles[i].active = TRUE;
 		obstacles[i].top = top;
 		obstacles[i].pos.x = FIX16(256);
 		obstacles[i].pos.y = top ? OBS_TOP_Y : OBS_BOTTOM_Y;
 		obstacles[i].size.x = FIX16(64);
 		obstacles[i].size.y = FIX16(32);
-		obstacles[i].startX = OBS_X;
+		obstacles[i].startX = obsX;
-		if(top){
+		for(u8 j = 0; j < 4; j++){
-			for(u8 j = 0; j < 4; j++){
+			VDP_drawImageEx(BG_B,
-				VDP_drawImageEx(BG_B,
+				top ? (j == 0 ? &rock1lt : (j == 1 ? &rock1t : (j == 2 ? &rock1rt : &rock1b))) : (j == 0 ? &rock1l : (j == 1 ? &rock1 : (j == 2 ? &rock1r : &rock1b))),
-					j == 0 ? &rock1lt : (j == 1 ? &rock1t : (j == 2 ? &rock1rt : &rock1b)),
+				TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + (top ? (j == 0 ? 32 : (j == 1 ? 48 : (j == 2 ? 64 : 80))) : (j == 0 ? 112 : (j == 1 ? 128 : (j == 2 ? 144 : 80))))),
-					TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + (j == 0 ? 32 : (j == 1 ? 48 : (j == 2 ? 64 : 80)))),
+				obsX + (top ? (j == 1 || j == 3 ? 2 : (j == 2 ? 6 : 0)) : ((j == 1 || j == 3 ? 2 : (j == 2 ? 6 : 0)))),
-					OBS_X + (j == 1 || j == 3 ? 2 : (j == 2 ? 6 : 0)),
+				top ? (OBS_CEIL_Y - (j == 0 || j == 2 ? 2 : (j == 3 ? 4 : 0))) : (OBS_FLOOR_Y + (j == 3 ? 4 : 0)),
-					OBS_CEIL_Y - (j == 0 || j == 2 ? 2 : (j == 3 ? 4 : 0)),
+				0, DMA_QUEUE);
-					0, DMA_QUEUE);
-			}
-		} else {
-			VDP_drawImageEx(BG_B, &rock1l, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 32 + 80), OBS_X, OBS_FLOOR_Y, 0, DMA_QUEUE);
-			VDP_drawImageEx(BG_B, &rock1, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 48 + 80), OBS_X + 2, OBS_FLOOR_Y, 0, DMA_QUEUE);
-			VDP_drawImageEx(BG_B, &rock1r, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 64 + 80), OBS_X + 2 + 4, OBS_FLOOR_Y, 0, DMA_QUEUE);
-			VDP_drawImageEx(BG_B, &rock1b, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 80), OBS_X + 2, OBS_FLOOR_Y + 4, 0, DMA_QUEUE);
 		}
 	}
 }
@@ -93,7 +88,7 @@ static void updateObstacle(s16 i){
 // update
 
 #define FG_SIZE 32
-#define FG_LIMIT FIX16(-320)
+#define FG_LIMIT FIX16(-512)
 
 #define FG_SIZE_F 40
 
@@ -117,12 +112,11 @@ static void scrollFg(){
 
 void loadFg(){
 	drawFg();
-	spawnObstacle(FALSE);
-	spawnObstacle(TRUE);
 }
 
 void updateFg(){
 	VDP_setHorizontalScrollTile(BG_B, 0, fgPosX, GAME_H_T, DMA);
 	scrollFg();
 	for(s16 i = 0; i < OBSTACLE_COUNT; i++) if(obstacles[i].active) updateObstacle(i);
+	if(clock % 60 == 0) spawnObstacle(clock % 120 < 60);
 }

src/global.h

@@ -19,7 +19,8 @@
 bool killBullets,
 	started;
 
-s16 clock;
+s16 clock,
+	bossHealth, bossMax;
 
 u32 score,
 	highScore;
@@ -30,3 +31,20 @@ void EMPTY(s16 i){emptyI = i;}
 void loadGame();
 
 void collideObstacleWithPlayer(s16);
+
+fix16 honeSpeed;
+Vect2D_f16 hPos, velPos;
+Vect2D_f16 hone(Vect2D_f16 pos, Vect2D_f16 target, fix16 speed, s16 lerp){
+	hPos.x = target.x;
+	hPos.y = target.y;
+	// if(lerp > 0){
+	// 	hPos.x = fix16Add(fix16Sub(hPos.x, FIX16(lerp)), FIX16(random() % (lerp * 2)));
+	// 	hPos.y = fix16Add(fix16Sub(hPos.y, FIX16(lerp)), FIX16(random() % (lerp * 2)));
+	// }
+	honeSpeed = fix32ToFix16(getApproximatedDistance(
+		fix32Sub(fix16ToFix32(pos.x), fix16ToFix32(hPos.x)),
+		fix32Sub(fix16ToFix32(pos.y), fix16ToFix32(hPos.y))));
+	hPos.x = fix16Mul(fix16Div(fix16Sub(hPos.x, pos.x), honeSpeed), speed);
+	hPos.y = fix16Mul(fix16Div(fix16Sub(hPos.y, pos.y), honeSpeed), speed);
+	return hPos;
+}

src/main.c

@@ -11,6 +11,8 @@
 #include "foreground.h"
 #include "bullets.h"
 #include "player.h"
+#include "enemies.h"
+#include "stage.h"
 #include "chrome.h"
 
 // game loop
@@ -36,6 +38,8 @@ void loadGame(){
 
 static void updateGame(){
 	updatePlayer();
+	updateEnemies();
+	updateStage();
 	updateBullets();
 	updateBg();
 	updateFg();

src/stage.h

@@ -0,0 +1,59 @@
+// stage
+
+#define SPAWN_MID 124
+
+
+// waves
+
+static void waveOne(){
+
+	struct enemySpawner spawner = {
+		.angle = 512,
+		.speed = FIX16(0.75),
+		.x = GAME_W + 24,
+		.y = SPAWN_MID,
+		.image = &fairy1,
+		.offX = 24,
+		.offY = 16
+	};
+	spawner.fixes[0] = FIX16(spawner.y);
+	spawner.fixes[1] = FIX16(8);
+	spawner.fixes[2] = FIX16(12);
+	spawner.fixes[3] = FIX16(0.1);
+	void updater(s16 i){
+		enemies[i].pos.y = fix16Sub(enemies[i].fixes[0], fix16Mul(sinFix16(enemies[i].fixes[1]), enemies[i].fixes[2]));
+		enemies[i].fixes[1] = fix16Add(enemies[i].fixes[1], enemies[i].fixes[3]);
+		if(enemies[i].clock == 30){
+			struct bulletSpawner spawner = {
+				.x = enemies[i].pos.x,
+				.y = enemies[i].pos.y,
+				.image = &smallRedBullet,
+				.angle = 512,
+				.speed = FIX16(1.5)
+			};
+			spawner.vel = hone(enemies[i].pos, player.pos, spawner.speed, 0);
+			spawnBullet(spawner, EMPTY);
+		}
+	}
+	for(u8 j = 0; j < 3; j++){
+		spawnEnemy(spawner, updater, EMPTY);
+		spawner.x += 50;
+	}
+}
+
+
+// loop
+
+s16 stageClock;
+
+static void updateWaves(){
+	switch(stageClock){
+		case 5: waveOne(); break;
+	}
+}
+
+void updateStage(){
+	updateWaves();
+	stageClock++;
+	if(stageClock >= CLOCK_LIMIT) stageClock -= CLOCK_LIMIT;
+}

src/structs.h

@@ -1,5 +1,8 @@
 // structs
 
+
+// bullets
+
 #define BULLET_COUNT 64
 struct bulletSpawner {
 	fix16 x, y, speed;
@@ -26,9 +29,45 @@ struct bullet {
 };
 struct bullet bullets[BULLET_COUNT];
 
+
+// player
+
 struct playerStruct {
 	Vect2D_f16 pos, vel;
 	Sprite* image;
 	s16 clock, invincibleClock, shotClock;
 };
 struct playerStruct player;
+
+
+// enemies
+
+#define ENEMY_COUNT 32
+
+struct enemySpawner {
+	fix16 speed;
+	s16 angle, offX, offY, x, y, anim, health, frame;
+	Vect2D_f16 vel;
+	Sprite* image;
+	bool boss, seal;
+	bool bools[COUNT_INT];
+	s16 ints[COUNT_INT];
+	fix16 fixes[COUNT_INT];
+};
+
+struct enemy {
+	bool active, boss, seen, seal, dead;
+	fix16 speed;
+	fix32 dist;
+	Vect2D_f16 pos, vel, off;
+	s16 angle, clock, health, shotClock;
+	Sprite* image;
+	Sprite* sealImage;
+	void (*updater)(s16);
+	void (*bossUpdater)(s16);
+	void (*suicide)(s16);
+	bool bools[COUNT_INT];
+	s16 ints[COUNT_INT];
+	fix16 fixes[COUNT_INT];
+};
+struct enemy enemies[ENEMY_COUNT];