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chatter protection

This commit is contained in:
Stefan Kinzel 2014-03-26 00:05:07 +01:00
parent 83f4b908a0
commit d1b377437e
1 changed files with 52 additions and 35 deletions
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87
games/kart/kart.c
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@ -41,19 +41,23 @@ game_descriptor_t kart_game_descriptor __attribute__((section(".game_descriptors
};
#endif
#define WAIT 75
#define WAIT 20
#define DRIVEDIV 3
#define DRIVEDIV 5
#define MOVEDIV 1
#define DECREASE_WIDTH_DIV 120
#define DECREASE_WIDTH_DIV 600
#define DIRECTION_DIV 20
#define KEY_IGNORE 10
#define CARCOLOR 3
#define BORDERCOLOR 2
#define LINECOLOR 1
#define CURVE_PROP 30
#define CURVE_PROP 50
uint8_t borders[NUM_ROWS][2];
uint8_t key_ignore[2];
void kart_game(){
@ -61,29 +65,23 @@ void kart_game(){
uint8_t carpos = NUM_COLS / 2;
uint32_t cycle = 0;
uint8_t draw_line = 1;
uint8_t width = NUM_COLS -2;
uint8_t width = NUM_COLS - 2;
uint8_t middle = NUM_COLS / 2;
char game_over[100] = "";
key_ignore[0] = 0;
key_ignore[1] = 0;
clear_screen(0);
// init border memory
for(uint8_t row = 0; row < NUM_ROWS; row++){
borders[row][0] = middle;
borders[row][1] = width;
borders[row][1] = NUM_COLS;
}
setpixel((pixel){carpos, NUM_ROWS-1}, CARCOLOR);
// Wait some seconds to start...
while(1){
cycle++;
wait(WAIT);
if(cycle >= DRIVEDIV*0){
break;
}
}
// main loop
while(1){
@ -92,24 +90,31 @@ void kart_game(){
width--;
}
// MOVE-STEP
if(cycle % MOVEDIV == 0){
if (JOYISLEFT){
carpos++;
setpixel((pixel){carpos, NUM_ROWS-1}, 0);
}else if (JOYISRIGHT){
carpos--;
setpixel((pixel){carpos, NUM_ROWS-1}, 0);
}
// MOVE
if (JOYISLEFT && key_ignore[0] <= 0){
setpixel((pixel){carpos, NUM_ROWS-1}, 0);
carpos++;
if(check_collision(carpos)){
break;
}
key_ignore[0] = KEY_IGNORE;
key_ignore[1] = 0;
}else if (JOYISRIGHT && key_ignore[1] <= 0){
setpixel((pixel){carpos, NUM_ROWS-1}, 0);
carpos--;
key_ignore[1] = KEY_IGNORE;
key_ignore[0] = 0;
}else if(!(JOYISRIGHT || JOYISLEFT)){
key_ignore[1] = 0;
key_ignore[0] = 0;
}
// DRIVE-STEP
if(cycle % DRIVEDIV == 0){
if(check_collision(carpos)){
break;
}
// DIRECTION-STEP
if(cycle % DIRECTION_DIV == 0){
// generate a route
int rnd = random8();
if(rnd < CURVE_PROP && middle-(width/2) > 1){
@ -117,7 +122,10 @@ void kart_game(){
}else if(rnd > 256-CURVE_PROP && middle+(width/2) < NUM_COLS-1){
middle++;
}
}
// DRIVE-STEP
if(cycle % DRIVEDIV == 0){
// shift pixmap down
drive();
@ -139,7 +147,7 @@ void kart_game(){
}
// paint middle line
if(width > 4 && draw_line){
if(width > 6 && draw_line){
setpixel((pixel){middle, 0}, LINECOLOR);
}
@ -147,6 +155,13 @@ void kart_game(){
setpixel((pixel){carpos, NUM_ROWS-1}, CARCOLOR);
cycle++;
if(key_ignore[0] > 0){
key_ignore[0]--;
}
if(key_ignore[1] > 0){
key_ignore[1]--;
}
wait(WAIT);
}
@ -159,15 +174,17 @@ void kart_game(){
*/
void drive(void){
unsigned char plane, row;
unsigned char plane, row, byte;
for(plane=0; plane<NUMPLANE; plane++){
for(row=NUM_ROWS-1;row>0; row--){
pixmap[plane][row][0] = pixmap[plane][row-1][0];
pixmap[plane][row][1] = pixmap[plane][row-1][1];
for(byte=0; byte < LINEBYTES; byte++){
pixmap[plane][row][byte] = pixmap[plane][row-1][byte];
}
}
for(byte=0; byte < LINEBYTES; byte++){
pixmap[plane][row][byte] = 0x00;
}
pixmap[plane][0][0] = 0x00;
pixmap[plane][0][1] = 0x00;
}
}