91 lines
1.9 KiB
C#
91 lines
1.9 KiB
C#
using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Atari.Atari2600
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{
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public partial class TIA
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{
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private struct MissileData
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{
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public bool Enabled;
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public bool ResetToPlayer;
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public byte HPosCnt;
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public byte Size;
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public byte Number;
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public byte Hm;
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public byte Collisions;
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public bool Tick()
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{
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var result = false;
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// At hPosCnt == 0, start drawing the missile, if enabled
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if (HPosCnt < (1 << Size))
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{
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if (Enabled && !ResetToPlayer)
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{
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// Draw the missile
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result = true;
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}
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}
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if ((Number & 0x07) == 0x01 || ((Number & 0x07) == 0x03))
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{
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if (HPosCnt >= 16 && HPosCnt <= (16 + (1 << Size) - 1))
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{
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if (Enabled && !ResetToPlayer)
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{
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// Draw the missile
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result = true;
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}
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}
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}
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if ((Number & 0x07) == 0x02 || ((Number & 0x07) == 0x03) || ((Number & 0x07) == 0x06))
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{
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if (HPosCnt >= 32 && HPosCnt <= (32 + (1 << Size) - 1))
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{
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if (Enabled && !ResetToPlayer)
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{
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// Draw the missile
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result = true;
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}
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}
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}
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if ((Number & 0x07) == 0x04 || (Number & 0x07) == 0x06)
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{
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if (HPosCnt >= 64 && HPosCnt <= (64 + (1 << Size) - 1))
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{
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if (Enabled && !ResetToPlayer)
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{
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// Draw the missile
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result = true;
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}
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}
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}
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// Increment the counter
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HPosCnt++;
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// Counter loops at 160
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HPosCnt %= 160;
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return result;
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}
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public void SyncState(Serializer ser)
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{
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ser.BeginSection("Missile");
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ser.Sync("enabled", ref Enabled);
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ser.Sync("resetToPlayer", ref ResetToPlayer);
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ser.Sync("hPosCnt", ref HPosCnt);
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ser.Sync("size", ref Size);
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ser.Sync("number", ref Number);
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ser.Sync("HM", ref Hm);
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ser.Sync("collisions", ref Collisions);
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ser.EndSection();
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}
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}
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}
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}
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