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SBSPSS/source/thing/thing.cpp
Charles 12567cce7a
2001-04-01 21:40:52 +00:00

856 lines
19 KiB
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/*=========================================================================
thing.cpp
Author: PKG
Created:
Project: Spongebob
Purpose:
Copyright (c) 2001 Climax Development Ltd
===========================================================================*/
/*----------------------------------------------------------------------
Includes
-------- */
#include "thing\thing.h"
#ifndef __PLAYER_PLAYER_H__
#include "player\player.h"
#endif
#ifndef __GAME_GAME_H__
#include "game\game.h"
#endif
#include "utils\utils.h"
/* Std Lib
------- */
/* Data
---- */
/*----------------------------------------------------------------------
Tyepdefs && Defines
------------------- */
/*----------------------------------------------------------------------
Structure defintions
-------------------- */
/*----------------------------------------------------------------------
Function Prototypes
------------------- */
/*----------------------------------------------------------------------
Vars
---- */
CThing *CThingManager::s_thingLists[CThing::MAX_TYPE]={NULL,NULL};
int CThingManager::s_initialised=false;
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::init()
{
int i;
ASSERT(!s_initialised);
for(i=0;i<CThing::MAX_TYPE;i++)
{
s_thingLists[i]=NULL;
}
s_initialised=true;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::shutdown()
{
int i;
CThing *thing;
ASSERT(s_initialised);
for(i=0;i<CThing::MAX_TYPE;i++)
{
while(s_thingLists[i])
{
thing=s_thingLists[i];
thing->shutdown();
delete thing;
}
}
s_initialised=false;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::thinkAllThings(int _frames)
{
int i;
CThing *thing;
CThing *thing1,*thing2;
for(i=0;i<CThing::MAX_TYPE;i++)
{
thing=s_thingLists[i];
while(thing)
{
thing->think(_frames);
thing->updateCollisionArea();
thing=thing->m_nextThing;
}
}
CPlayer *player = GameScene.getPlayer();
if ( player )
{
player->clearPlatform();
}
// Player -> Platform collision
thing1=s_thingLists[CThing::TYPE_PLATFORM];
thing2=s_thingLists[CThing::TYPE_PLAYER];
thing2->setHasPlatformCollided( false );
thing2->setNewCollidedPos( thing2->getPos() );
while(thing1&&thing2)
{
//if ( !thing1->hasChild( thing2 ) )
{
thing1->removeAllChild();
if(thing1->canCollide()&&
thing1->checkCollisionAgainst(thing2, _frames))
{
thing1->addChild( thing2 );
thing1->collidedWith(thing2);
}
}
/*else
{
DVECTOR thatPos = thing2->getPos();
thatPos.vy = thing1->getNewYPos( thing2 );
thing2->setNewCollidedPos( thatPos );
thing1->collidedWith(thing2);
}*/
thing1=thing1->m_nextThing;
}
// Player -> Pickup collision
thing1=s_thingLists[CThing::TYPE_PICKUP];
thing2=s_thingLists[CThing::TYPE_PLAYER];
while(thing1&&thing2)
{
if(thing1->canCollide()&&
thing1->checkCollisionAgainst(thing2, _frames))
{
thing1->collidedWith(thing2);
}
thing1=thing1->m_nextThing;
}
// Player -> Enemy collision
thing1=s_thingLists[CThing::TYPE_ENEMY];
thing2=s_thingLists[CThing::TYPE_PLAYER];
while(thing1&&thing2)
{
if(thing1->canCollide()&&
thing1->checkCollisionAgainst(thing2, _frames))
{
thing1->collidedWith(thing2);
}
thing1=thing1->m_nextThing;
}
// Player -> Enemy projectile collision
thing1=s_thingLists[CThing::TYPE_ENEMYPROJECTILE];
thing2=s_thingLists[CThing::TYPE_PLAYER];
while(thing1&&thing2)
{
if(thing1->canCollide()&&
thing1->checkCollisionAgainst(thing2, _frames))
{
thing1->collidedWith(thing2);
}
thing1=thing1->m_nextThing;
}
// Player -> Trigger collision
thing1=s_thingLists[CThing::TYPE_TRIGGER];
thing2=s_thingLists[CThing::TYPE_PLAYER];
while(thing1&&thing2)
{
if(thing1->canCollide()&&
thing1->checkCollisionAgainst(thing2, _frames))
{
thing1->collidedWith(thing2);
}
thing1=thing1->m_nextThing;
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::renderAllThings()
{
int i;
CThing *thing;
for(i=0;i<CThing::MAX_TYPE;i++)
{
thing=s_thingLists[i];
while(thing)
{
thing->render();
thing=thing->m_nextThing;
}
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::processEventAllThings(GAME_EVENT _event,CThing *_sourceThing)
{
int i;
CThing *thing;
for(i=0;i<CThing::MAX_TYPE;i++)
{
thing=s_thingLists[i];
while(thing)
{
thing->processEvent(_event,_sourceThing);
thing=thing->m_nextThing;
}
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::addToThingList(CThing *_this)
{
_this->m_nextThing=s_thingLists[_this->getThingType()];
s_thingLists[_this->getThingType()]=_this;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThingManager::removeFromThingList(CThing *_this)
{
CThing *prevThing,*thing;
prevThing=NULL;
thing=s_thingLists[_this->getThingType()];
while(thing!=_this)
{
prevThing=thing;
thing=thing->m_nextThing;
ASSERT(thing); // Not in the list!?!?
}
if(prevThing)
{
prevThing->m_nextThing=_this->m_nextThing;
}
else
{
s_thingLists[_this->getThingType()]=_this->m_nextThing;
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::init()
{
Parent=NULL;
Next=NULL;
Pos.vx=Pos.vy=10;
// Add to thing list
CThingManager::addToThingList(this);
setCollisionSize(20,20); // Some temporary defaults.. (pkg)
setCollisionCentreOffset(0,0);
m_collisionAngle = 0;
m_centreCollision = false;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::shutdown()
{
if (Parent)
{ // Is child
Parent->removeChild(this);
}
else
{ // Is Parent
removeAllChild();
}
// Remove from thing list
CThingManager::removeFromThingList(this);
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::think(int _frames)
{
PosDelta.vx=Pos.vx-PosLast.vx;
PosDelta.vy=Pos.vy-PosLast.vy;
PosLast=Pos;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
#if defined (__USER_paul__) || defined (__USER_charles__)
int showthings=true;
#include "gfx\prim.h"
#include "level\level.h"
void CThing::render()
{
if(showthings)
{
DVECTOR ofs;
CRECT area;
ofs=CLevel::getCameraPos();
area=getCollisionArea();
area.x1-=ofs.vx;
area.y1-=ofs.vy;
area.x2-=ofs.vx;
area.y2-=ofs.vy;
if(area.x1<=511&&area.x2>=0&&
area.y1<=255&&area.y2>=0)
{
area=getCollisionArea();
SVECTOR points[4];
VECTOR vecPoints[4];
points[0].vx = area.x1 - Pos.vx;
points[0].vy = area.y1 - Pos.vy;
points[1].vx = area.x1 - Pos.vx;
points[1].vy = area.y2 - Pos.vy;
points[2].vx = area.x2 - Pos.vx;
points[2].vy = area.y2 - Pos.vy;
points[3].vx = area.x2 - Pos.vx;
points[3].vy = area.y1 - Pos.vy;
MATRIX mtx;
SetIdentNoTrans(&mtx );
RotMatrixZ( m_collisionAngle, &mtx );
ApplyMatrix( &mtx, &points[0], &vecPoints[0] );
ApplyMatrix( &mtx, &points[1], &vecPoints[1] );
ApplyMatrix( &mtx, &points[2], &vecPoints[2] );
ApplyMatrix( &mtx, &points[3], &vecPoints[3] );
vecPoints[0].vx += Pos.vx - ofs.vx;
vecPoints[0].vy += Pos.vy - ofs.vy;
vecPoints[1].vx += Pos.vx - ofs.vx;
vecPoints[1].vy += Pos.vy - ofs.vy;
vecPoints[2].vx += Pos.vx - ofs.vx;
vecPoints[2].vy += Pos.vy - ofs.vy;
vecPoints[3].vx += Pos.vx - ofs.vx;
vecPoints[3].vy += Pos.vy - ofs.vy;
//DrawLine(area.x1,area.y1,area.x1,area.y2,255,255,255,0);
//DrawLine(area.x1,area.y2,area.x2,area.y2,255,255,255,0);
//DrawLine(area.x2,area.y2,area.x2,area.y1,255,255,255,0);
//DrawLine(area.x2,area.y1,area.x1,area.y1,255,255,255,0);
DrawLine( vecPoints[0].vx, vecPoints[0].vy, vecPoints[1].vx, vecPoints[1].vy,255,255,255,0);
DrawLine( vecPoints[1].vx, vecPoints[1].vy, vecPoints[2].vx, vecPoints[2].vy,255,255,255,0);
DrawLine( vecPoints[2].vx, vecPoints[2].vy, vecPoints[3].vx, vecPoints[3].vy,255,255,255,0);
DrawLine( vecPoints[3].vx, vecPoints[3].vy, vecPoints[0].vx, vecPoints[0].vy,255,255,255,0);
area.x1=Pos.vx-10-ofs.vx;
area.y1=Pos.vy-10-ofs.vy;
area.x2=Pos.vx+10-ofs.vx;
area.y2=Pos.vy+10-ofs.vy;
DrawLine(area.x1,area.y1,area.x2,area.y2,255,0,0,0);
DrawLine(area.x2,area.y1,area.x1,area.y2,255,0,0,0);
}
}
}
#else
void CThing::render()
{
}
#endif
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::addChild(CThing *Child)
{
CThing *List=Next;
if ( List )
{
// Find end of list
while (List->Next)
{
List=List->Next;
}
List->Next=Child;
Child->Parent=this;
}
else
{
// List does not exist, create
Next = Child;
Child->Parent=this;
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::removeChild(CThing *Child)
{
CThing *List=Next;
CThing *Last=NULL;
// Find Child
while ( List != Child && List->Next )
{
Last = List;
List = List->Next;
}
// if there are no more links to continue down, the current 'List' must either be the correct item, or the item does not
// exist in the list at all
ASSERT( List == Child );
if ( Last )
{
Last->Next = List->Next;
}
else
{
this->Next = List->Next;
}
Child->Parent=NULL;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::removeAllChild()
{
CThing *List=Next;
while (List)
{
CThing *Next=List->Next;
List->Parent=NULL;
List->Next=NULL;
List=Next;
}
Next=NULL;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
bool CThing::hasChild(CThing *Child)
{
CThing *nextChild = Next;
while( nextChild )
{
if ( nextChild == Child )
{
return( true );
}
nextChild = nextChild->Next;
}
return( false );
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::setCollisionSize(int _w,int _h)
{
m_collisionSize.vx=_w;
m_collisionSize.vy=_h;
if(m_collisionSize.vx>m_collisionSize.vy)
{
m_collisionRadius=m_collisionSize.vx;
}
else
{
m_collisionRadius=m_collisionSize.vy;
}
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::updateCollisionArea()
{
m_collisionCentre.vx=Pos.vx+m_collisionCentreOffset.vx;
m_collisionCentre.vy=Pos.vy+m_collisionCentreOffset.vy;
m_collisionArea.x1=m_collisionCentre.vx-(m_collisionSize.vx/2);
m_collisionArea.x2=m_collisionArea.x1+m_collisionSize.vx;
m_collisionArea.y1=m_collisionCentre.vy-(m_collisionSize.vy/2);
m_collisionArea.y2=m_collisionArea.y1+m_collisionSize.vy;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
s32 CThing::getNewYPos(CThing *_thisThing)
{
CRECT thisRect;
DVECTOR thatPos = _thisThing->getPos();
thisRect = getCollisionArea();
// 'render' collision box at correct angle
SVECTOR testPointsNonRel[4];
VECTOR testPoints[4];
testPointsNonRel[0].vx = thisRect.x1 - Pos.vx;
testPointsNonRel[0].vy = thisRect.y1 - Pos.vy;
testPointsNonRel[1].vx = thisRect.x2 - Pos.vx;
testPointsNonRel[1].vy = thisRect.y1 - Pos.vy;
testPointsNonRel[2].vx = thisRect.x2 - Pos.vx;
testPointsNonRel[2].vy = thisRect.y2 - Pos.vy;
testPointsNonRel[3].vx = thisRect.x1 - Pos.vx;
testPointsNonRel[3].vy = thisRect.y2 - Pos.vy;
MATRIX mtx;
SetIdentNoTrans(&mtx );
RotMatrixZ( m_collisionAngle, &mtx );
int i;
for ( i = 0 ; i < 4 ; i++ )
{
ApplyMatrix( &mtx, &testPointsNonRel[i], &testPoints[i] );
testPoints[i].vx += Pos.vx;
testPoints[i].vy += Pos.vy;
}
// now find the highest y pos
// first set highestY to lowest of the four points
s16 highestY = testPoints[0].vy;
for ( i = 1 ; i < 4 ; i++ )
{
if ( testPoints[i].vy > highestY ) // remember y is inverted
{
highestY = testPoints[i].vy;
}
}
for ( i = 0 ; i < 4 ; i++ )
{
int j = i + 1;
j %= 4;
VECTOR highestX, lowestX;
if ( testPoints[i].vx < testPoints[j].vx )
{
lowestX = testPoints[i];
highestX = testPoints[j];
}
else
{
lowestX = testPoints[j];
highestX = testPoints[i];
}
if ( highestX.vx == lowestX.vx )
{
// have to compare heights of both points to get highest
if ( lowestX.vy < highestY )
{
highestY = lowestX.vy;
}
if ( highestX.vy < highestY )
{
highestY = highestX.vy;
}
}
else
{
if ( thatPos.vx >= lowestX.vx && thatPos.vx <= highestX.vx )
{
// current position is above or below this line
s16 testY;
testY = lowestX.vy + ( ( thatPos.vx - lowestX.vx ) * ( highestX.vy - lowestX.vy ) ) /
( highestX.vx - lowestX.vx );
if ( testY < highestY )
{
highestY = testY;
}
}
}
}
return( highestY );
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
int CThing::checkCollisionAgainst(CThing *_thisThing, int _frames)
{
DVECTOR pos,thisThingPos;
int radius;
int collided;
MATRIX mtx;
pos=getCollisionCentre();
thisThingPos=_thisThing->getCollisionCentre();
radius=getCollisionRadius()+_thisThing->getCollisionRadius();
collided=false;
if(abs(pos.vx-thisThingPos.vx)<radius&&
abs(pos.vy-thisThingPos.vy)<radius)
{
CRECT thisRect,thatRect;
thisRect=getCollisionArea();
// ensure user 'sticks' to platform whilst it is moving along
thatRect=_thisThing->getCollisionArea();
// rotate thatPos opposite way to this CThing's collision angle, so that we can regard them both as being at 0 rotation
// get target thing's position
DVECTOR thatPos = _thisThing->getPos();
// get target thing's position relative to this thing's position
SVECTOR relativePos;
relativePos.vx = thatPos.vx - Pos.vx;
relativePos.vy = thatPos.vy - Pos.vy;
VECTOR newPos;
// get target thing's collision area relative to 0
thatRect.x1 -= thatPos.vx;
thatRect.y1 -= thatPos.vy;
thatRect.x2 -= thatPos.vx;
thatRect.y2 -= thatPos.vy;
SetIdentNoTrans(&mtx );
RotMatrixZ( -m_collisionAngle, &mtx );
// rotation target relative position back to 0 by this thing's collision angle
ApplyMatrix( &mtx, &relativePos, &newPos );
// add on this thing's position to get new target thing's position after rotation around this thing
newPos.vx += Pos.vx;
newPos.vy += Pos.vy;
// reposition target thing's collision area
thatRect.x1 += newPos.vx;
thatRect.y1 += newPos.vy;
thatRect.x2 += newPos.vx;
thatRect.y2 += newPos.vy;
// check to see if bounding boxes collide
if(((thisRect.x1>=thatRect.x1&&thisRect.x1<=thatRect.x2)||(thisRect.x2>=thatRect.x1&&thisRect.x2<=thatRect.x2)||(thisRect.x1<=thatRect.x1&&thisRect.x2>=thatRect.x2))&&
((thisRect.y1>=thatRect.y1&&thisRect.y1<=thatRect.y2)||(thisRect.y2>=thatRect.y1&&thisRect.y2<=thatRect.y2)||(thisRect.y1<=thatRect.y1&&thisRect.y2>=thatRect.y2)))
{
collided=true;
// check to see if centre point (i.e. where the object is standing) collides too
if ( ( newPos.vx >= thisRect.x1 && newPos.vx <= thisRect.x2 ) &&
( newPos.vy >= thisRect.y1 && newPos.vy <= thisRect.y2 ) )
{
thatPos.vy = getNewYPos( _thisThing );
s32 verticalDelta = abs( _thisThing->getPosDelta().vy );
if ( thatPos.vy - _thisThing->getPos().vy >= -verticalDelta )
{
if ( _thisThing->getHasPlatformCollided() )
{
// if this has already collided with a platform, check the current platform is
// (a) within 10 units,
// (b) higher
DVECTOR oldCollidedPos = _thisThing->getNewCollidedPos();
s32 oldY = abs( oldCollidedPos.vy - ( _thisThing->getPos().vy - verticalDelta ) );
s32 currentY = abs( thatPos.vy - ( _thisThing->getPos().vy - verticalDelta ) );
//if ( thatPos.vy < oldCollidedPos.vy )
if ( currentY < oldY )
{
_thisThing->setNewCollidedPos( thatPos );
}
}
else
{
_thisThing->setHasPlatformCollided( true );
_thisThing->setCentreCollision( true );
_thisThing->setNewCollidedPos( thatPos );
}
}
else
{
_thisThing->setCentreCollision( false );
}
}
else
{
_thisThing->setCentreCollision( false );
}
}
}
return collided;
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::processEvent(GAME_EVENT _event,CThing *_sourceThing)
{
// do nothing by default - ignore event
}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CThing::shove( DVECTOR move )
{
Pos.vx += move.vx;
Pos.vy += move.vy;
}
/*===========================================================================
end */
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