work on obstacle collision

src/background.h

@@ -19,8 +19,8 @@ static void drawBg(){
 
 // update
 
-#define BG_SPEED FIX16(1)
+#define BG_SPEED FIX16(0.5)
-#define BG_SPEED_NORM FIX16(0.707)
+#define BG_SPEED_NORM FIX16(0.354)
 
 #define BG_SIZE 64
 
@@ -28,7 +28,6 @@ static void drawBg(){
 
 s16 bgPosX[GAME_H_T];
 fix16 bgPosXF[GAME_H_T];
-Vect2D_f16 bgPos;
 
 static void scrollBg(){
 	for(u8 y = 0; y < GAME_H_T; y++){

src/foreground.h

@@ -9,7 +9,7 @@
 
 struct obstacle {
 	bool active, top;
-	Vect2D_f16 pos;
+	Vect2D_f16 pos, size;
 	s16 startX;
 };
 struct obstacle obstacles[OBSTACLE_COUNT];
@@ -31,10 +31,13 @@ static void drawFg(){
 
 // obstacle
 
-#define OBS_CEIL_Y CEIL_Y + 4
+#define OBS_CEIL_Y 7
-#define OBS_FLOOR_Y FLOOR_Y - 4
+#define OBS_FLOOR_Y 20
 #define OBS_X 32
 
+#define OBS_TOP_Y FIX16(24)
+#define OBS_BOTTOM_Y FIX16(160)
+
 s16 fgPos;
 
 static void spawnObstacle(bool top){
@@ -44,6 +47,9 @@ static void spawnObstacle(bool top){
 		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;
 		if(top){
 			VDP_drawImageEx(BG_B, &rock1lt, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 32), OBS_X, OBS_CEIL_Y - 2, 0, DMA);
@@ -64,20 +70,19 @@ static void spawnObstacle(bool top){
 
 static void killObstacle(s16 i){
 	obstacles[i].active = FALSE;
-	if(obstacles[i].top){
+	VDP_clearTileMapRect(BG_B, obstacles[i].startX, obstacles[i].top ? OBS_CEIL_Y : OBS_FLOOR_Y, 8, 4);
-		VDP_clearTileMapRect(BG_B, obstacles[i].startX, OBS_CEIL_Y, 8, 8);
+	for(u8 x = 0; x < 2; x++)
-		for(u8 i = 0; i < 2; i++) VDP_drawImageEx(BG_B, &rock1t, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I),obstacles[i].startX + 4 * i, CEIL_Y, 0, DMA);
+		VDP_drawImageEx(BG_B, obstacles[i].top ? &rock1t : &rock1, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + (obstacles[i].top ? 0 : 16)),
-	} else {
+			obstacles[i].startX + 4 * x, obstacles[i].top ? CEIL_Y : FLOOR_Y, 0, DMA);
-		VDP_clearTileMapRect(BG_B, obstacles[i].startX, OBS_FLOOR_Y, 8, 8);
+}
-		for(u8 i = 0; i < 2; i++) VDP_drawImageEx(BG_B, &rock1, TILE_ATTR_FULL(PAL2, 1, 0, 0, FG_I + 16), obstacles[i].startX + 4 * i, FLOOR_Y, 0, DMA);
+
-	}
+static void collideObstacle(s16 i){
+	collideObstacleWithPlayer(i);
 }
 
 static void updateObstacle(s16 i){
 	obstacles[i].pos.x = fix16Sub(obstacles[i].pos.x, FG_SPEED);
-	if(obstacles[i].pos.x <= OBSTACLE_LIMIT_X){
+	obstacles[i].pos.x <= OBSTACLE_LIMIT_X ? killObstacle(i) : collideObstacle(i);
-		killObstacle(i);
-	}
 }
 
 

src/global.h

@@ -36,4 +36,6 @@ struct bulletSpawner {
 	bool bools[COUNT_INT];
 	s16 ints[COUNT_INT];
 	fix16 fixes[COUNT_INT];
-};
+};
+
+void collideObstacleWithPlayer(s16);

src/main.c

@@ -27,9 +27,9 @@ static void loadInternals(){
 
 static void loadGame(){
 	loadBg();
+	loadChrome();
 	loadFg();
 	loadPlayer();
-	loadChrome();
 }
 
 static void updateGame(){

src/player.h

@@ -27,6 +27,8 @@ static void spawnPlayer(){
 		TILE_ATTR(PAL1, 0, 0, 0));
 }
 
+#define PLAYER_SPEED FIX16(2.5)
+#define PLAYER_SPEED_NORM FIX16(1.768)
 
 // collision
 
@@ -45,10 +47,19 @@ static void checkPlayerBounds(){
 	else if(player.pos.y > PLAYER_LIMIT_H_HORI) player.pos.y = PLAYER_LIMIT_H_HORI;
 }
 
+void collideObstacleWithPlayer(s16 i){
+	if(obstacles[i].pos.x < fix16Add(player.pos.x, PLAYER_OFF) &&
+		fix16Add(obstacles[i].pos.x, obstacles[i].size.x) > fix16Sub(player.pos.x, PLAYER_OFF) &&
+		obstacles[i].pos.y < fix16Add(player.pos.y, PLAYER_OFF) &&
+		fix16Add(obstacles[i].pos.y, obstacles[i].size.y) > fix16Sub(player.pos.y, PLAYER_OFF)){
+		if(obstacles[i].pos.x > player.pos.x) player.pos.x = fix16Sub(fix16Sub(obstacles[i].pos.x, FG_SPEED), PLAYER_OFF);
+		else if(obstacles[i].pos.y > player.pos.y) player.pos.y = fix16Sub(obstacles[i].pos.y, PLAYER_OFF);
+		checkPlayerBounds();
+	}
+}
+
 // movement
 
-#define PLAYER_SPEED FIX16(2.5)
-#define PLAYER_SPEED_NORM FIX16(1.768)
 
 s16 playerFrame;