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Added missile-to-player offsetting. Completing the list of graphics-related TODOs.

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This commit is contained in:
Thomas Harte 2016-05-22 17:01:56 -04:00
parent 4c6d4d899d
commit c3e719c4ab
1 changed files with 20 additions and 4 deletions
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24
Machines/Atari2600/Atari2600.cpp
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@ -195,7 +195,7 @@ uint8_t Machine::get_output_pixel()
playerPixels[c] = (_playerGraphics[_playerGraphicsSelector[c]][c] >> ((_pixelCounter[c] >> 2) ^ flipMask)) &1;
}
if((_missileGraphicsEnable[c]&2) && !(_missileGraphicsReset[c]&2)) {
if((_missileGraphicsEnable[c]&2) && !_missileGraphicsReset[c]) {
int missileSize = 1 << ((_playerAndMissileSize[c] >> 4)&3);
missilePixels[c] = (_pixelCounter[c+2] < missileSize) ? 1 : 0;
}
@ -578,9 +578,25 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
case 0x28:
case 0x29:
if(!(*value&0x02) && _missileGraphicsReset[decodedAddress - 0x28]&0x02)
_objectCounter[decodedAddress - 0x26] = _objectCounter[decodedAddress - 0x28]; // TODO: +3 for normal, +6 for double, +10 for quad
_missileGraphicsReset[decodedAddress - 0x28] = *value;
{
int index = decodedAddress - 0x28;
if(!(*value&0x02) && _missileGraphicsReset[index])
{
_objectCounter[index + 2] = _objectCounter[index];
uint8_t repeatMask = _playerAndMissileSize[index] & 7;
int extra_offset;
switch(repeatMask)
{
default: extra_offset = 3; break;
case 5: extra_offset = 6; break;
case 7: extra_offset = 10; break;
}
_objectCounter[index + 2] = (_objectCounter[index + 2] + extra_offset)%160;
}
_missileGraphicsReset[index] = (*value) & 0x02;
}
break;
case 0x2a: