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VVVVVV/desktop_version/src/Ent.cpp
Misa 3ca7b09012 Fix regression: quick stopping changing drawframe
This fixes a regression that desyncs my Nova TAS after re-removing the
1-frame input delay.

Quick stopping is simply holding left/right but for less than 5 frames.
Viridian doesn't decelerate when you let go and they immediately stop in
place. (The code calls this tapping, but "quick stopping" is a better
name because you can immediately counter-strafe to stop yourself from
decelrating in the first place, and that works because of this same
code.)

So, the sequence of events in 2.2 and previous looks like this:

- gameinput()
  - If quick stopping, set vx to 0
- gamerender()
  - Change drawframe depending on vx
- gamelogic()
  - Use drawframe for collision (whyyyyyyyyyyyyyyyyyyyyyyyyyyy)

And now (ignoring the intermediate period where the whole loop order was
wrong), the sequence of events in 2.3 looks like this:

- gamerenderfixed()
  - Change drawframe depending on vx
- gamerender()
- gameinput()
  - If quick stopping, set vx to 0
- gamelogic()
  - Use drawframe for collision (my mind has become numb to pain)

So, this means that all the player movement stuff is completely the
same. Except their drawframe is going to be different.

Unfortunately, I had overlooked that gameinput() sets vx and that
animateentities() (in gamerenderfixed()) checks vx. Although, to be
fair, it's a pretty dumb decision to make collision detection be based
on the actual sprites' pixels themselves, instead of a hitbox, in the
first place, so you'd expect THAT to be the end of the dumb parade. Or
maybe you shouldn't, I don't know.

So, what's the solution?

What I've done here is added duplicates of framedelay, drawframe, and
walkingframe, for collision use only. They get updated in gamelogic(),
after gameinput(), which is after when vx could be set to 0.

I've kept the original framedelay, drawframe, and walkingframe around,
to keep the same visuals as closely as possible.

However, due to the removal of the input delay, whenever you quick stop,
your sprite will be wrong for just 1 frame - because when you let go of
the direction key, the game will set your vx to 0 and the logical
drawframe will update to reflect that, but the previous frame cannot
know in advance that you'll release the key on the next frame, and so
the visual drawframe will assume that you keep holding the key.

Whereas in 2.2 and below, when you release a direction key, the player's
position will only update to reflect that on the next frame, but the
current frame can immediately recognize that and update the drawframe
now, instead of retconning it later.

Basically the visual drawframe assumes that you keep holding the key,
and if you don't, then it takes on the value of the collision drawframe
anyway, so it's okay. And it's only visual, anyway - the collision
drawframe of the next frame (when you release the key) will be the same
as the drawframe of the frame you release the key in 2.2 and below.

But I really don't care to try and fix this for if you re-enable the
input delay because it's minor and it'd be more complicated.
2021-07-28 20:11:16 -04:00

664 lines
9.5 KiB
C++

#include "Ent.h"
#include "Game.h"
#include "Graphics.h"
entclass::entclass(void)
{
clear();
}
void entclass::clear(void)
{
invis = false;
type = 0;
size = 0;
tile = 0;
rule = 0;
state = 0;
statedelay = 0;
life = 0;
colour = 0;
para = 0;
behave = 0;
animate = 0;
xp = 0;
yp = 0;
ax = 0;
ay = 0;
vx = 0;
vy = 0;
w = 16;
h = 16;
cx = 0;
cy = 0;
newxp = 0;
newyp = 0;
oldxp = 0;
oldyp = 0;
x1 = 0;
y1 = 0;
x2 = 320;
y2 = 240;
gravity = false;
onground = 0;
onroof = 0;
collisionframedelay = 0;
collisiondrawframe = 0;
collisionwalkingframe = 0;
visualonground = 0;
visualonroof = 0;
onentity = 0;
harmful = false;
onwall = 0;
onxwall = 0;
onywall = 0;
isplatform = false;
framedelay = 0;
drawframe = 0;
walkingframe = 0;
dir = 0;
actionframe = 0;
realcol = 0;
lerpoldxp = 0;
lerpoldyp = 0;
}
bool entclass::outside(void)
{
// Returns true if any point of the entity is outside the map.
// Adjusts velocity for a clean collision.
if (xp < x1)
{
xp = x1;
return true;
}
if (yp < y1)
{
yp = y1;
return true;
}
if (xp + w > x2)
{
xp = x2 - w;
return true;
}
if (yp + h > y2)
{
yp = y2 - h;
return true;
}
return false;
}
void entclass::setenemy( int t )
{
switch(t)
{
case 0:
//lies emitter
switch ((int) para)
{
case 0:
tile = 60;
animate = 2;
colour = 6;
behave = 10;
w = 32;
h = 32;
x1 = -200;
break;
case 1:
yp += 10;
lerpoldyp += 10;
tile = 63;
animate = 100; //LIES
colour = 6;
behave = 11;
para = 9; //destroyed when outside
x1 = -200;
x2 = 400;
w = 26;
h = 10;
cx = 1;
cy = 1;
break;
case 2:
tile = 62;
animate = 100;
colour = 6;
behave = -1;
w = 32;
h = 32;
break;
}
break;
case 1:
//FACTORY emitter
switch ((int) para)
{
case 0:
tile = 72;
animate = 3;
size = 9;
colour = 6;
behave = 12;
w = 64;
h = 40;
cx = 0;
cy = 24;
break;
case 1:
xp += 4;
lerpoldxp += 4;
yp -= 4;
lerpoldyp -= 4;
tile = 76;
animate = 100; // Clouds
colour = 6;
behave = 13;
para = -6; //destroyed when outside
x2 = 400;
w = 32;
h = 12;
cx = 0;
cy = 6;
break;
case 2:
tile = 77;
animate = 100;
colour = 6;
behave = -1;
w = 32;
h = 16;
break;
}
break;
default:
break;
}
}
void entclass::setenemyroom( int rx, int ry )
{
//Simple function to initilise simple enemies
rx -= 100;
ry -= 100;
switch(rn(rx, ry))
{
//Space Station 1
case rn(12, 3): //Security Drone
tile = 36;
colour = 8;
animate = 1;
break;
case rn(13, 3): //Wavelengths
tile = 32;
colour = 7;
animate = 1;
w = 32;
break;
case rn(15, 3): //Traffic
tile = 28;
colour = 6;
animate = 1;
w = 22;
h = 32;
break;
case rn(12, 5): //The Yes Men
tile = 40;
colour = 9;
animate = 1;
w = 20;
h = 20;
break;
case rn(13, 6): //Hunchbacked Guards
tile = 44;
colour = 8;
animate = 1;
w = 16;
h = 20;
break;
case rn(13, 4): //Communication Station
harmful = false;
if (xp == 256)
{
//transmittor
tile = 104;
colour = 4;
animate = 7;
w = 16;
h = 16;
xp -= 24;
lerpoldxp -= 24;
yp -= 16;
lerpoldyp -= 16;
}
else
{
//radar dish
tile =124;
colour = 4;
animate = 6;
w = 32;
h = 32;
cx = 4;
size = 9;
xp -= 4;
lerpoldxp -= 4;
yp -= 32;
lerpoldyp -= 32;
}
break;
//The Lab
case rn(4, 0):
tile = 78;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(2, 0):
tile = 88;
colour = 11;
animate = 1;
w = 16;
h = 16;
break;
//Space Station 2
case rn(14, 11):
colour = 17;
break; //Lies
case rn(16, 11):
colour = 8;
break; //Lies
case rn(13, 10):
colour = 11;
break; //Factory
case rn(13, 9):
colour = 9;
break; //Factory
case rn(13, 8):
colour = 8;
break; //Factory
case rn(11, 13): //Truth
tile = 64;
colour = 7;
animate = 100;
w = 44;
h = 10;
size = 10;
break;
case rn(17, 7): //Brass sent us under the top
tile =82;
colour = 8;
animate = 5;
w = 28;
h = 32;
cx = 4;
break;
case rn(10, 7): // (deception)
tile = 92;
colour = 6;
animate = 1;
w = 16;
h = 16;
break;
case rn(14, 13): // (chose poorly)
tile = 56;
colour = 6;
animate = 1;
w = 15;
h = 24;
break;
case rn(13, 12): // (backsliders)
tile = 164;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(14, 8): // (wheel of fortune room)
tile = 116;
colour = 12;
animate = 1;
w = 32;
h = 32;
break;
case rn(16, 9): // (seeing dollar signs)
tile = 68;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(16, 7): // (tomb of mad carew)
tile = 106;
colour = 7;
animate = 2;
w = 24;
h = 25;
break;
//Warp Zone
case rn(15, 2): // (numbers)
tile = 100;
colour = 6;
animate = 1;
w = 32;
h = 14;
yp += 1;
lerpoldyp += 1;
break;
case rn(16, 2): // (Manequins)
tile = 52;
colour = 7;
animate = 5;
w = 16;
h = 25;
yp -= 4;
lerpoldyp -= 4;
break;
case rn(18, 0): // (Obey)
tile = 51;
colour = 11;
animate = 100;
w = 30;
h = 14;
break;
case rn(19, 1): // Ascending and Descending
tile = 48;
colour = 9;
animate = 5;
w = 16;
h = 16;
break;
case rn(19, 2): // Shockwave Rider
tile = 176;
colour = 6;
animate = 1;
w = 16;
h = 16;
break;
case rn(18, 3): // Mind the gap
tile = 168;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(17, 3): // Edge Games
if (yp ==96)
{
tile = 160;
colour = 8;
animate = 1;
w = 16;
h = 16;
}
else
{
tile = 156;
colour = 8;
animate = 1;
w = 16;
h = 16;
}
break;
case rn(16, 0): // I love you
tile = 112;
colour = 8;
animate = 5;
w = 16;
h = 16;
break;
case rn(14, 2): // That's why I have to kill you
tile = 114;
colour = 6;
animate = 5;
w = 16;
h = 16;
break;
case rn(18, 2): // Thinking with Portals
//depends on direction
if (xp ==88)
{
tile = 54+12;
colour = 12;
animate = 100;
w = 60;
h = 16;
size = 10;
}
else
{
tile = 54;
colour = 12;
animate = 100;
w = 60;
h = 16;
size = 10;
}
break;
//Final level
case rn(50-100, 53-100): //The Yes Men
tile = 40;
colour = 9;
animate = 1;
w = 20;
h = 20;
break;
case rn(48-100, 51-100): //Wavelengths
tile = 32;
colour = 7;
animate = 1;
w = 32;
break;
case rn(43-100,52-100): // Ascending and Descending
tile = 48;
colour = 9;
animate = 5;
w = 16;
h = 16;
break;
case rn(46-100,51-100): //kids his age
tile = 88;
colour = 11;
animate = 1;
w = 16;
h = 16;
break;
case rn(43-100,51-100): // Mind the gap
tile = 168;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(44-100,51-100): // vertigo?
tile = 172;
colour = 7;
animate = 100;
w = 32;
h = 32;
break;
case rn(44-100,52-100): // (backsliders)
tile = 164;
colour = 7;
animate = 1;
w = 16;
h = 16;
break;
case rn(43-100, 56-100): //Intermission 1
tile = 88;
colour = 21;
animate = 1;
w = 16;
h = 16;
break;
case rn(45-100, 56-100): //Intermission 1
tile = 88;
colour = 21;
animate = 1;
w = 16;
h = 16;
break;
//The elephant
case rn(11, 9):
case rn(12, 9):
case rn(11, 8):
case rn(12, 8):
tile = 0;
colour = 102;
animate = 0;
w = 464;
h = 320;
size = 11;
harmful = false;
break;
}
}
void entclass::settreadmillcolour( int rx, int ry )
{
rx -= 100;
ry -= 100;
rx += 50 - 12;
ry += 50 - 14; //Space Station
tile = 20; //default as blue
switch(rn(rx, ry))
{
case rn(52, 48):
tile = 791;
break; //Cyan
case rn(49, 47):
tile = 24;
break; //Yellow
case rn(56, 44):
tile = 24;
break; //Yellow
case rn(54, 49):
tile = 24;
break; //Yellow
case rn(49, 49):
tile = 36;
break; //Green
case rn(55, 44):
tile = 36;
break; //Green
case rn(54, 43):
tile = 36;
break; //Green
case rn(53, 49):
tile = 36;
break; //Green
case rn(54, 45):
tile = 711;
break; //Green (special)
case rn(51, 48):
tile = 711;
break; //Green (special)
case rn(50, 49):
tile = 28;
break; //Purple
case rn(54, 44):
tile = 28;
break; //Purple
case rn(49, 42):
tile = 28;
break; //Purple
case rn(55, 43):
tile = 28;
break; //Purple
case rn(54, 47):
tile = 28;
break; //Purple
case rn(53, 48):
tile = 28;
break; //Purple
case rn(51, 47):
tile = 32;
break; //Red
case rn(52, 49):
tile = 32;
break; //Red
case rn(48, 43):
tile = 32;
break; //Red
case rn(55, 47):
tile = 32;
break; //Red
case rn(54, 48):
tile = 32;
break; //Red
default:
return;
break;
}
}
void entclass::updatecolour(void)
{
switch (size)
{
case 0: // Sprites
case 7: // Teleporter
case 9: // Really Big Sprite! (2x2)
case 10: // 2x1 Sprite
case 13: // Special for epilogue: huge hero!
graphics.setcol(colour);
realcol = graphics.ct.colour;
break;
case 3: // Big chunky pixels!
realcol = graphics.bigchunkygetcol(colour);
break;
case 4: // Small pickups
graphics.huetilesetcol(colour);
realcol = graphics.ct.colour;
break;
case 11: // The fucking elephant
if (game.noflashingmode)
{
graphics.setcol(22);
}
else
{
graphics.setcol(colour);
}
realcol = graphics.ct.colour;
break;
case 12: // Regular sprites that don't wrap
// if we're outside the screen, we need to draw indicators
if ((xp < -20 && vx > 0) || (xp > 340 && vx < 0))
{
graphics.setcol(23);
}
else
{
graphics.setcol(colour);
}
realcol = graphics.ct.colour;
break;
default:
break;
}
}
bool entclass::ishumanoid(void)
{
return type == 0
|| type == 12
|| type == 14
|| type == 55;
}