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Objectified cars and smoke.

This commit is contained in:
Truls Alexander Tangstad 2005-12-05 21:33:37 +00:00
parent f7519ad939
commit 60cb1dbbc9
1 changed files with 133 additions and 152 deletions
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285
gba/cartest/src/cartest.cpp
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@ -32,10 +32,8 @@ typedef s32 FIXED; // 32bit FIXED in 24.8 format
#define NUMSMOKES 30
u16 PaletteBuffer[256];
OBJATTR oe_buffer[2+NUMSMOKES+10];
OBJAFFINE *const oa_buffer = (OBJAFFINE*)oe_buffer;
s8 smoke_frame[NUMSMOKES];
unsigned int frame;
@ -45,21 +43,122 @@ void VblankInterrupt()
ScanKeys();
}
typedef struct {
class Smoke {
OBJATTR* oam;
int num_entries;
public:
s8* smoke_frame;
u8 next_smoke;
Smoke(int num_entries, OBJATTR* start) {
oam = start;
smoke_frame = new s8[num_entries];
next_smoke = 0;
this->num_entries = num_entries;
for (u16 i=0; i<num_entries; i++) {
oam[i].attr1 = OBJ_X(20+(i*10));
oam[i].attr0 = OBJ_256_COLOR | OBJ_Y(40);
// 6 == off
smoke_frame[i] = 6;
}
}
void increase_frame_counts() {
for (u8 i=0; i<num_entries; i++) {
if (smoke_frame[i] < 6) {
smoke_frame[i] += 1;
}
}
}
void dump_at(int x, int y) {
smoke_frame[next_smoke] = 0;
oam[next_smoke].attr1 = OBJ_X(x);
oam[next_smoke].attr0 = OBJ_256_COLOR | OBJ_Y(y);
next_smoke += 1;
if (next_smoke>=num_entries) {
next_smoke = 0;
}
}
void update_sprites() {
for (u8 i=0; i<num_entries; i++)
oam[i].attr2 = OBJ_CHAR(528 + 2*smoke_frame[i]);
}
~Smoke() {
delete smoke_frame;
}
};
class Car {
OBJAFFINE* aff_matrix;
OBJATTR* oam;
int index;
public:
Car(int x, int y, OBJAFFINE* aff, OBJATTR* entry, int aff_index,
int sprite_index) {
this->x = INT2FIX(x);
this->y = INT2FIX(y);
speed = 0;
angle = 0;
aff_matrix = aff;
oam = entry;
index = aff_index;
oam->attr2 = OBJ_CHAR(sprite_index);
}
void rotate(int alpha) {
angle += alpha;
if (angle < 0) {
angle += 512;
} else if (angle >= 512) {
angle -= 512;
}
}
void speedup() {
if (speed<30) {
speed += 1;
}
}
void slowdown() {
if (speed>0) {
speed -= 1;
}
}
void update_position() {
x -= (speed >> 3)*lut_sin(angle);
y -= (speed >> 3)*lut_cos(angle);
if (x>=INT2FIX(232)) {
x -= INT2FIX(256);
} else if (x<INT2FIX(-24)) {
x += INT2FIX(256);
}
if (y>=INT2FIX(152)) {
y -= INT2FIX(176);
} else if (y<INT2FIX(-24)) {
y += INT2FIX(176);
}
}
void update_matrix() {
aff_matrix->pa = lut_cos(angle);
aff_matrix->pb = -lut_sin(angle);
aff_matrix->pc = lut_sin(angle);
aff_matrix->pd = lut_cos(angle);
}
void update_oam() {
oam->attr1 = OBJ_SIZE(1) | OBJ_ROT_SCALE(index) | OBJ_X(FIX2INT(x));
oam->attr0 = OBJ_256_COLOR | OBJ_DOUBLE | OBJ_ROT_SCALE_ON | OBJ_Y(FIX2INT(y));
}
FIXED x, y;
int speed, angle;
} Car;
};
int main(void)
{
OBJATTR*red_car = &oe_buffer[0];
OBJATTR*blue_car = &oe_buffer[1];
OBJAFFINE*red_car_aff = &oa_buffer[0];
OBJAFFINE*blue_car_aff = &oa_buffer[1];
// We'll make a few smoke clouds
OBJATTR*smokes = &oe_buffer[2];
// Set up the interrupt handlers
InitInterrupt();
@ -90,178 +189,60 @@ int main(void)
CpuFastSet(smoke_bin, (void*)free_space, COPY32 | smoke_bin_size/4);
free_space += smoke_bin_size;
red_car->attr2 = OBJ_CHAR(512);
blue_car->attr2 = OBJ_CHAR(520);
u8 next_smoke = 0;
u8 i;
for (i=0; i<NUMSMOKES; i++) {
smokes[i].attr1 = OBJ_X(20+(i*10));
smokes[i].attr0 = OBJ_256_COLOR | OBJ_Y(40);
// 6 == off
smoke_frame[i] = 6;
}
Car red, blue;
red.x = INT2FIX(102);
red.y = INT2FIX(72);
blue.x = INT2FIX(122);
blue.y = INT2FIX(72);
red.speed = 0;
red.angle = 0;
blue.speed = 0;
blue.angle = 0;
Car red(102, 72, &oa_buffer[0], &oe_buffer[0], 0, 512);
Car blue(122, 72, &oa_buffer[1], &oe_buffer[1], 1, 520);
Smoke smoke(NUMSMOKES, &oe_buffer[2]);
while (1) {
if (KeysHeld() & KEY_RIGHT) {
red.angle -= 8;
red.rotate(-8);
} else if (KeysHeld() & KEY_LEFT) {
red.angle += 8;
red.rotate(8);
}
if (red.angle < 0) {
red.angle += 512;
} else if (red.angle >= 512) {
red.angle -= 512;
}
if (KeysHeld() & KEY_A) {
blue.angle -= 8;
blue.rotate(-8);
} else if (KeysHeld() & KEY_B) {
blue.angle += 8;
}
if (blue.angle < 0) {
blue.angle += 512;
} else if (blue.angle >= 512) {
blue.angle -= 512;
blue.rotate(8);
}
if (KeysHeld() & KEY_L) {
if ((red.speed<30) && (red.speed>=0)) {
// slow speedup
red.speed += 1;
} else if (red.speed<0) {
// break if we're going backward
red.speed += 2;
}
red.speedup();
}
if (KeysHeld() & KEY_R) {
if ((blue.speed<30) && (blue.speed>=0)) {
// slow speedup
blue.speed += 1;
} else if (blue.speed<0) {
// break if we're going backward
blue.speed += 2;
}
blue.speedup();
}
/* Disabled */
/* if (KeysHeld() & KEY_B) { */
/* if ((red.speed>=-5) && (red.speed<=0)) { */
/* // slow speedup */
/* red.speed -= 1; */
/* } else if (red.speed>0) { */
/* // break if we're going forward */
/* red.speed -= 2; */
/* } */
/* } */
// slow down if we're not doing anything
if (!(KeysHeld() & KEY_L)) {
if (red.speed>0) {
red.speed -= 1;
} else if (red.speed<0) {
red.speed += 1;
}
red.slowdown();
}
if (!(KeysHeld() & KEY_R)) {
if (blue.speed>0) {
blue.speed -= 1;
} else if (blue.speed<0) {
blue.speed += 1;
}
blue.slowdown();
}
red.x -= (red.speed >> 3)*lut_sin(red.angle);
red.y -= (red.speed >> 3)*lut_cos(red.angle);
red.update_position();
red.update_matrix();
red.update_oam();
if (red.x>=INT2FIX(232)) {
red.x -= INT2FIX(256);
} else if (red.x<INT2FIX(-24)) {
red.x += INT2FIX(256);
}
blue.update_position();
blue.update_matrix();
blue.update_oam();
if (red.y>=INT2FIX(152)) {
red.y -= INT2FIX(176);
} else if (red.y<INT2FIX(-24)) {
red.y += INT2FIX(176);
}
red_car_aff->pa = lut_cos(red.angle);
red_car_aff->pb = -lut_sin(red.angle);
red_car_aff->pc = lut_sin(red.angle);
red_car_aff->pd = lut_cos(red.angle);
red_car->attr1 = OBJ_SIZE(1) | OBJ_X(FIX2INT(red.x));
red_car->attr0 = OBJ_256_COLOR | OBJ_DOUBLE | OBJ_ROT_SCALE_ON | OBJ_Y(FIX2INT(red.y));
blue.x -= (blue.speed >> 3)*lut_sin(blue.angle);
blue.y -= (blue.speed >> 3)*lut_cos(blue.angle);
if (blue.x>=INT2FIX(232)) {
blue.x -= INT2FIX(256);
} else if (blue.x<INT2FIX(-24)) {
blue.x += INT2FIX(256);
}
if (blue.y>=INT2FIX(152)) {
blue.y -= INT2FIX(176);
} else if (blue.y<INT2FIX(-24)) {
blue.y += INT2FIX(176);
}
blue_car_aff->pa = lut_cos(blue.angle);
blue_car_aff->pb = -lut_sin(blue.angle);
blue_car_aff->pc = lut_sin(blue.angle);
blue_car_aff->pd = lut_cos(blue.angle);
blue_car->attr1 = OBJ_SIZE(1) | OBJ_ROT_SCALE(1) | OBJ_X(FIX2INT(blue.x));
blue_car->attr0 = OBJ_256_COLOR | OBJ_DOUBLE | OBJ_ROT_SCALE_ON | OBJ_Y(FIX2INT(blue.y));
// Update smoke cloud frames
if ((frame & 3) == 3) {
for (i=0; i<NUMSMOKES; i++) {
if (smoke_frame[i] < 6) {
smoke_frame[i] += 1;
}
}
smoke.increase_frame_counts();
}
// place a new smoke cloud after car if driving
// forwards
if ((red.speed!=0) && ((frame & 1) == 1)) {
smoke_frame[next_smoke] = 0;
smokes[next_smoke].attr1 = OBJ_X(FIX2INT(red.x)+12);
smokes[next_smoke].attr0 = OBJ_256_COLOR | OBJ_Y(FIX2INT(red.y)+12);
smoke.dump_at(FIX2INT(red.x)+12, FIX2INT(red.y)+12);
}
next_smoke += 1;
if ((blue.speed!=0) && ((frame & 1) == 1)) {
smoke_frame[next_smoke] = 0;
smokes[next_smoke].attr1 = OBJ_X(FIX2INT(blue.x)+12);
smokes[next_smoke].attr0 = OBJ_256_COLOR | OBJ_Y(FIX2INT(blue.y)+12);
smoke.dump_at(FIX2INT(blue.x)+12, FIX2INT(blue.y)+12);
}
next_smoke += 1;
if (next_smoke>=NUMSMOKES) {
next_smoke = 0;
}
for (i=0; i<NUMSMOKES; i++)
smokes[i].attr2 = OBJ_CHAR(528 + 2*smoke_frame[i]);
smoke.update_sprites();
VBlankIntrWait();
CpuFastSet(oe_buffer, OAM, COPY32 | sizeof(oe_buffer)/4);
}