thirdparty/scummvm
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renamed unkScreenEffect7 to transitionEffect; added some comments, renamed vars etc.; fixed typoe in screen_eff7_table1 which caused effects 2&3 to be completly messed up

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svn-id: r4375
This commit is contained in:
Max Horn 2002-05-22 22:36:58 +00:00
parent 6fada4e7dc
commit 1ba002766e
2 changed files with 35 additions and 24 deletions
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57
gfx.cpp
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@ -582,7 +582,7 @@ void Scumm::fadeToBlackEffect(int a)
case 1:
case 2:
case 3:
unkScreenEffect7(a - 1);
transitionEffect(a - 1);
break;
case 128:
unkScreenEffect6();
@ -1742,40 +1742,49 @@ void Scumm::unkScreenEffect4()
}
static const int8 screen_eff7_table1[4][16] = {
{1, 1, -1, 1, -1, 1, -1, -1,
1, -1, -1, -1, 1, 1, 1, -1},
{0, 1, 2, 1, 2, 0, 2, 1,
2, 0, 2, 1, 0, 0, 0, 0},
{-2, -1, 0, -1, -2, -1, -2, 0 - 2, -1, -2, 0, 0, 0, 0, 0},
{0, -1, -2, -1, -2, 0, -2, -1 - 2, 0, -2, -1, 0, 0, 0, 0}
{ 1, 1, -1, 1, -1, 1, -1, -1,
1, -1, -1, -1, 1, 1, 1, -1},
{ 0, 1, 2, 1, 2, 0, 2, 1,
2, 0, 2, 1, 0, 0, 0, 0},
{-2, -1, 0, -1, -2, -1, -2, 0, -2, -1, -2, 0, 0, 0, 0, 0},
{ 0, -1, -2, -1, -2, 0, -2, -1, -2, 0, -2, -1, 0, 0, 0, 0}
};
static const byte screen_eff7_table2[4][16] = {
{0, 0, 39, 0, 39, 0, 39, 24,
0, 24, 39, 24, 0, 0, 0, 24},
{0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 1, 0, 255, 0, 0, 0},
{39, 24, 39, 24, 39, 24, 39, 24,
38, 24, 38, 24, 255, 0, 0, 0},
{0, 24, 39, 24, 39, 0, 39, 24,
38, 0, 38, 24, 255, 0, 0, 0}
{ 0, 0, 39, 0, 39, 0, 39, 24,
0, 24, 39, 24, 0, 0, 0, 24},
{ 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 1, 0, 255, 0, 0, 0},
{39, 24, 39, 24, 39, 24, 39, 24,
38, 24, 38, 24, 255, 0, 0, 0},
{ 0, 24, 39, 24, 39, 0, 39, 24,
38, 0, 38, 24, 255, 0, 0, 0}
};
static const byte screen_eff7_table3[4] = {
static const byte transition_num_of_iterations[4] = {
13, 25, 25, 25
};
/* Transition effect */
void Scumm::unkScreenEffect7(int a)
/* Transition effect. There are four different effects possible,
* indicated by the value of a:
* 0: Iris effect
* 1: ?
* 2: ?
* 3: ?
* All effects basically operate on 8x8 blocks of the screen. These blocks
* are updated in a certain order; the exact order determines how the
* effect appears to the user.
*/
void Scumm::transitionEffect(int a)
{
int tab_1[16];
int delta[16]; // Offset applied during each iteration
int tab_2[16];
int i, j;
int bottom;
int l, t, r, b;
for (i = 0; i < 16; i++) {
tab_1[i] = screen_eff7_table1[a][i];
delta[i] = screen_eff7_table1[a][i];
j = screen_eff7_table2[a][i];
if (j == 24)
j = (virtscr[0].height >> 3) - 1;
@ -1783,7 +1792,7 @@ void Scumm::unkScreenEffect7(int a)
}
bottom = virtscr[0].height >> 3;
for (j = 0; j < screen_eff7_table3[a]; j++) {
for (j = 0; j < transition_num_of_iterations[a]; j++) {
for (i = 0; i < 4; i++) {
l = tab_2[i * 4];
t = tab_2[i * 4 + 1];
@ -1809,8 +1818,10 @@ void Scumm::unkScreenEffect7(int a)
}
for (i = 0; i < 16; i++)
tab_2[i] += tab_1[i];
tab_2[i] += delta[i];
// Draw the current state to the screen and wait half a sec so the user
// can watch the effect taking place.
updatePalette();
_system->update_screen();
waitForTimer(30);
@ -2177,7 +2188,7 @@ void Scumm::screenEffect(int effect)
case 1:
case 2:
case 3:
unkScreenEffect7(effect - 1);
transitionEffect(effect - 1);
break;
case 128:
unkScreenEffect6();