done

games/breakout/ball.c

@@ -2,24 +2,38 @@
 
 void ball_think (ball_t *b)
 {
-	uint8_t new_x, new_y;
+	int8_t proj_x, proj_y, bounce;
 	if (!b->strength)
 		return;
 	
-	new_x = (b->x + b->dir_x) >> 8;
-	new_y = (b->y + b->dir_y) >> 8;
+	/* projection of the new coordinates */
+	proj_x = (b->x + (b->dir_x)) / 256;
+	proj_y = (b->y + (b->dir_y)) / 256;
+
+	bounce = check_bounce (proj_x, b->y / 256);
+	if (bounce & BOUNCE_UNDEF)
+		bounce = (BOUNCE_X | bounce) & (BOUNCE_X | BOUNCE_Y);
+
+	bounce |= check_bounce (b->x / 256, proj_y);
+	if (bounce & BOUNCE_UNDEF)
+		bounce = (BOUNCE_Y | bounce) & (BOUNCE_X | BOUNCE_Y);
+
+	bounce |= check_bounce (proj_x, proj_y);
+	if (bounce & BOUNCE_UNDEF)
+		bounce = BOUNCE_X | BOUNCE_Y;
 
-	printf("B: %i %i, d: %i %i\n", new_x, new_y);
 	
 	/* ball fell out of the field */
-//	if (new_y >= NUM_ROWS)
+//	if (proj_y >= NUM_ROWS)
 //		ball_die (b);
 	
+
 	/* bounce in x direction */
-	if (check_bounce (new_x, b->y >> 8))
+	if (bounce & 0x01)
 	{
 		b->dir_x *= -1; /* invert x vector */
-		new_x += b->dir_x;
+		b->dir_x ^= random8() & 0x0F; /* randomize bouncing */
+
 
 #if BOUNCE_SLOWDOWN
 		if (b->dir_x < 0)
@@ -33,11 +47,10 @@ void ball_think (ball_t *b)
 	}
 
 	/* bounce in y direction */
-	if (check_bounce ((b->x >> 8), new_y))
+	if (bounce & 0x02)
 	{
 		b->dir_y *= -1; /* invert y vector */
-		new_y += b->dir_y;
-
+		b->dir_y ^= random8() & 0x0F;
 #if BOUNCE_SLOWDOWN
 		if (b->dir_y < 0)
 		{
@@ -49,8 +62,12 @@ void ball_think (ball_t *b)
 #endif
 	}
 
-	b->x = new_x;
-	b->y = new_y;
+	b->y += b->dir_y;
+	b->x += b->dir_x;
+
+
+
+	printf("B: %i %i, d: %i %i\n", b->x, b->y, b->dir_x, b->dir_y);
 }
 	
 void ball_die (ball_t *in_b)
@@ -65,14 +82,17 @@ void ball_die (ball_t *in_b)
 void ball_draw (ball_t *b)
 {
 	pixel p;
-	p.x = b->x;
-	p.y = b->y;
+	p.x = (uint8_t) abs(b->x / 256);
+	p.y = (uint8_t) abs(b->y / 256);
+
+	printf("db: %i %i\n", p.x, p.y);
 
 	setpixel (p, 3);
 }
 
 void ball_spawn (ball_t *in_ball, uint16_t in_x, uint16_t in_y, int16_t in_dir_x, int16_t in_dir_y, uint8_t in_strength)
 {
+	printf ("spawn: %i %i, dir: %i, %i\n", in_x, in_y, in_dir_x, in_dir_y);
 	in_ball->x = in_x;
 	in_ball->y = in_y;
 	in_ball->dir_x = in_dir_x;

games/breakout/ball.h

@@ -7,8 +7,8 @@
 
 typedef struct
 {
-	uint16_t x;
-	uint16_t y;
+	int16_t x;
+	int16_t y;
 	int16_t dir_x; /* direction vector */
 	int16_t dir_y;
 	uint8_t strength;

games/breakout/breakout.c

@@ -4,7 +4,7 @@ void borg_breakout();
 
 #ifdef MENU_SUPPORT
 //static uint8_t breakout_icon[8] PROGMEM = {0x03, 0x03, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00}; /* our Icon */
-static uint8_t breakout_icon[8] PROGMEM = {0x03, 0x03, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00}; /* our Icon */
+static uint8_t breakout_icon[8] PROGMEM = {0x18, 0x18, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00}; /* our Icon */
 
 game_descriptor_t breakout_game_descriptor __attribute__((section(".game_descriptors"))) =
 {
@@ -18,12 +18,11 @@ void borg_breakout()
 	uint8_t rungame = 1, num_balls = 1;
 	ball_t balls[1];
 
+	/* spawn a ball in the middle bottom of the field, let it move upwards with random speed & direction */
+	ball_spawn (&balls[0], (uint16_t) (NUM_COLS / 2) * 256, (uint16_t) (NUM_ROWS-2) * 256, -120, 150, START_LIFES);
+	level_init(3);
 	rebound_init();
 
-	/* spawn a ball in the middle bottom of the field, let it move upwards with random speed & x-direction */
-	ball_spawn (&balls[0], (NUM_COLS / 2) << 8, (NUM_ROWS-2) << 8, - (random8() % 8), (random8() % 8), START_LIFES);
-	level_init(1);
-
 	while (rungame)
 	{
 		wait(50);

games/breakout/common.h

@@ -1,6 +1,8 @@
 #ifndef COMMON_H
 #define COMMON_H
 #include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
 #include "../../joystick/joystick.h"
 #include "../../config.h"
 #include "../../autoconf.h"

games/breakout/config.h

@@ -1,5 +1,5 @@
 /* amount of speed to slow down on bounce */
-#define BOUNCE_SLOWDOWN 1
+#define BOUNCE_SLOWDOWN 0
 
 /* minimum speed of the ball */
 #define BALL_MINSPEED 0x0010

games/breakout/level.c

@@ -8,11 +8,11 @@ enum game_field_t level_field (uint8_t in_x, uint8_t in_y, uint8_t in_lvl)
 	{
 		case 1:
 			/* space for the lower half of the level */
-			if (in_y < (NUM_ROWS / 2))
+			if (in_y > (NUM_ROWS / 2))
 				return sp;
 			
 			/* type 2 bricks for 1/4th of the field */
-			if (in_y >= (NUM_ROWS / 4))
+			if (in_y <= (NUM_ROWS / 4))
 				return b2;
 			
 			/* fill the rest with type 1 */
@@ -29,15 +29,15 @@ enum game_field_t level_field (uint8_t in_x, uint8_t in_y, uint8_t in_lvl)
 
 		case 2:
 			/* space for the lower third of the level */
-			if (in_y < (NUM_ROWS / 3))
+			if (in_y > (NUM_ROWS / 3))
 				return sp;
 			
 			/* type 3 bricks for 1/8th of the field */
-			if (in_y >= (NUM_ROWS / 8))
+			if (in_y <= (NUM_ROWS / 8))
 				return b3;
 			
 			/* type 2 bricks for 1/4th of the field */
-			if (in_y >= (NUM_ROWS / 4))
+			if (in_y <= (NUM_ROWS / 4))
 				return b2;
 			
 			/* fill the rest with type 1 */
@@ -45,10 +45,10 @@ enum game_field_t level_field (uint8_t in_x, uint8_t in_y, uint8_t in_lvl)
 
 		default: /* random level generation */
 			/* space for the lower half of the level */
-			if (in_y < (NUM_ROWS / 2))
+			if (in_y > (NUM_ROWS / 2))
 				return sp;
 			
-			return random8() % 5; /* fill field with random bricks (and spaces) */
+			return random8() % 4; /* fill field with random bricks (and spaces) */
 		break;
 	}
 }

games/breakout/playfield.c

@@ -12,27 +12,24 @@ void brick_damage (uint8_t in_x, uint8_t in_y)
 
 	if (playfield[in_x][in_y] > bs || playfield[in_x][in_y] == 0)
 		return;
-	
-	playfield[in_x][in_y]--;
+	playfield[in_x][in_y] -= 1;
 	score_add (1);
 }
 
-uint8_t check_bounce (uint8_t in_x, uint8_t in_y)
+uint8_t check_bounce (int8_t in_x, int8_t in_y)
 {
+	uint8_t ov = 0;
 	/* overflow check */
-	if (in_x >= NUM_ROWS)
-		return 1;
+	if (in_x >= NUM_ROWS || in_x < 0)
+		ov |= BOUNCE_X;
 	
-	if (in_y >= NUM_COLS)
-		return 1;
+	if (in_y >= NUM_COLS || in_y < 0)
+		ov |= BOUNCE_Y;
 	
+	if (ov) return ov;
 	/* collisions with real objects */
-	switch (playfield[in_x][in_y])
+	switch (playfield[abs(in_x)][abs(in_y)])
 	{
-		case sp:
-		case bl:
-			return 0;
-		
 		case b2:
 		case b3:
 		case b1:
@@ -40,11 +37,17 @@ uint8_t check_bounce (uint8_t in_x, uint8_t in_y)
 		/* intentional fallthrough */
 
 		case bs:
-			return 1;		
+			return BOUNCE_UNDEF | ov;		
 		
 		/* bouncing on the rebound needs special care */
 		case rb:
-			return 2;
+			return BOUNCE_Y;
+		
+		case sp:
+		case bl:
+		default:
+			return ov;
+		
 	}
 }
 

games/breakout/playfield.h

@@ -2,6 +2,10 @@
 #define PLAYFIELD_H
 #include "common.h"
 
+#define BOUNCE_X 0x01
+#define BOUNCE_Y 0x02
+#define BOUNCE_UNDEF 0x04
+
 /* entries for the playing field */
 enum game_field_t
 {
@@ -23,6 +27,6 @@ void playfield_set (uint8_t in_x, uint8_t in_y, enum game_field_t in_field);
 
 /* @description Checks if there is an object in the way. If so, it returns 1
  */
-uint8_t check_bounce (uint8_t in_x, uint8_t in_y);
+uint8_t check_bounce (int8_t in_x, int8_t in_y);
 
 #endif /* PLAYFIELD_H */