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DREAMWEB: Comment and de-hardcode initrain

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This commit is contained in:
Willem Jan Palenstijn 2011-11-15 19:27:36 +01:00
parent 0730d108c3
commit 07a7c877ba
1 changed files with 63 additions and 20 deletions
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83
engines/dreamweb/sprite.cpp
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@ -935,47 +935,90 @@ Rain *DreamGenContext::splitintolines(uint8 x, uint8 y, Rain *rain) {
struct RainLocation {
uint8 location;
uint8 x, y;
uint8 rainSpace;
uint8 rainSpacing;
};
const RainLocation rainLocationList[] =
{
{ 1,44,10,16 },
{ 4,11,30,14 },
{ 4,22,30,14 },
{ 3,33,10,14 },
{ 10,33,30,14 },
{ 10,22,30,24 },
{ 9,22,10,14 },
{ 2,33,0,14 },
{ 2,22,0,14 },
{ 6,11,30,14 },
{ 7,11,20,18 },
{ 7,0,20,18 },
{ 7,0,30,18 },
{ 55,44,0,14 },
{ 5,22,30,14 },
{ 8,0,10,18 },
{ 8,11,10,18 },
{ 8,22,10,18 },
{ 8,33,10,18 },
{ 8,33,20,18 },
{ 8,33,30,18 },
{ 8,33,40,18 },
{ 8,22,40,18 },
{ 8,11,40,18 },
{ 21,44,20,18 },
{ 255,0,0,0 }
};
void DreamGenContext::initrain() {
const RainLocation *r = rainLocationList;
Rain *rainList = (Rain *)segRef(data.word(kBuffers)).ptr(kRainlist, 0);
Rain *rain = rainList;
const RainLocation *rainLocationList = (const RainLocation *)cs.ptr(offset_rainlocations, 0);
const RainLocation *rainLocation = rainLocationList;
do {
if (rainLocation->location == 0xff) {
rain->x = 0xff;
return;
}
if ((rainLocation->location == data.byte(kReallocation)) &&
(rainLocation->x == data.byte(kMapx)) &&
(rainLocation->y == data.byte(kMapy))) {
data.byte(kRainspace) = rainLocation->rainSpace;
uint8 rainSpacing = 0;
// look up location in rainLocationList to determine rainSpacing
for (r = rainLocationList; r->location != 0xff; ++r) {
if (r->location == data.byte(kReallocation) &&
r->x == data.byte(kMapx) && r->y == data.byte(kMapy)) {
rainSpacing = r->rainSpacing;
break;
}
++rainLocation;
} while (true);
}
if (rainSpacing == 0) {
// location not found in rainLocationList: no rain
rain->x = 0xff;
return;
}
// start lines of rain from top of screen
uint8 x = 4;
do {
uint8 delta = (engine->randomNumber() & 31) + 3;
if (delta >= data.byte(kRainspace))
continue;
uint8 delta;
do {
delta = (engine->randomNumber() & 31) + 3;
} while (delta >= rainSpacing);
x += delta;
if (x >= data.byte(kMapxsize))
break;
rain = splitintolines(x, 0, rain);
} while (true);
// start lines of rain from side of screen
uint8 y = 0;
do {
uint8 delta = (engine->randomNumber() & 31) + 3;
if (delta >= data.byte(kRainspace))
continue;
uint8 delta;
do {
delta = (engine->randomNumber() & 31) + 3;
} while (delta >= rainSpacing);
y += delta;
if (y >= data.byte(kMapysize))
break;
rain = splitintolines(data.byte(kMapxsize) - 1, y, rain);
} while (true);