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Threw in missiles. To 'complete' graphics output. Or, rather, to move me on to debugging.

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This commit is contained in:
Thomas Harte 2016-05-18 07:54:44 -04:00
parent 354143a78c
commit 877c55b5c5
1 changed files with 10 additions and 55 deletions
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65
Machines/Atari2600/Atari2600.cpp
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@ -157,77 +157,32 @@ uint8_t Machine::get_output_pixel()
if(_pixelCounter[c] < 8)
playerPixels[c] = (_playerGraphics[c] >> (_pixelCounter[c] ^ flipMask)) &1;
}
if((_missileGraphicsEnable[c]&2) && !(_missileGraphicsReset[c]&2)) {
int missileSize = 1 << ((_playerAndMissileSize[c] >> 4)&3);
missilePixels[c] = (_pixelCounter[c+2] < missileSize) ? 1 : 0;
}
uint8_t repeatMask = _playerAndMissileSize[c] & 7;
switch(repeatMask)
{
default:
_pixelCounter[c]++;
_pixelCounter[c+2]++;
break;
case 5:
_pixelCounter[c] += ((_objectCounter[c] >> 1)&1);
_pixelCounter[c+2] += ((_objectCounter[c+2] >> 1)&1);
break;
case 7:
_pixelCounter[c] += ((_objectCounter[c] >> 2)&1);
_pixelCounter[c+2] += ((_objectCounter[c+2] >> 2)&1);
break;
}
}
// get player and missile proposed pixels
/* uint8_t playerPixels[2] = {0, 0}, missilePixels[2] = {0, 0};
for(int c = 0; c < 2; c++)
{
const uint8_t repeatMask = _playerAndMissileSize[c]&7;
if(_playerGraphics[c]) {
// figure out player colour
int flipMask = (_playerReflection[c]&0x8) ? 0 : 7;
int relativeTimer = _objectCounter[c] - 5;
switch (repeatMask)
{
case 0: break;
default:
if(repeatMask&4 && relativeTimer >= 64) relativeTimer -= 64;
else if(repeatMask&2 && relativeTimer >= 32) relativeTimer -= 32;
else if(repeatMask&1 && relativeTimer >= 16) relativeTimer -= 16;
break;
case 5:
relativeTimer >>= 1;
break;
case 7:
relativeTimer >>= 2;
break;
}
if(relativeTimer >= 0 && relativeTimer < 8)
playerPixels[c] = (_playerGraphics[c] >> (relativeTimer ^ flipMask)) &1;
}
// figure out missile colour
if((_missileGraphicsEnable[c]&2) && !(_missileGraphicsReset[c]&2)) {
int missileIndex = _objectCounter[2+c] - 4;
switch (repeatMask)
{
case 0: break;
default:
if(repeatMask&4 && missileIndex >= 64) missileIndex -= 64;
else if(repeatMask&2 && missileIndex >= 32) missileIndex -= 32;
else if(repeatMask&1 && missileIndex >= 16) missileIndex -= 16;
break;
case 5:
missileIndex >>= 1;
break;
case 7:
missileIndex >>= 2;
break;
}
int missileSize = 1 << ((_playerAndMissileSize[c] >> 4)&3);
missilePixels[c] = (missileIndex >= 0 && missileIndex < missileSize) ? 1 : 0;
}
}
// accumulate collisions
if(playerPixels[0] | playerPixels[1]) {
/* if(playerPixels[0] | playerPixels[1]) {
_collisions[0] |= ((missilePixels[0] & playerPixels[1]) << 7) | ((missilePixels[0] & playerPixels[0]) << 6);
_collisions[1] |= ((missilePixels[1] & playerPixels[0]) << 7) | ((missilePixels[1] & playerPixels[1]) << 6);