SBSPSS/source/platform/pcart.cpp

/*=========================================================================

	pcart.cpp

	Author:		CRB
	Created:
	Project:	Spongebob
	Purpose:

	Copyright (c) 2001 Climax Development Ltd

===========================================================================*/

#ifndef __PLATFORM_PCART_H__
#include "platform\pcart.h"
#endif

#ifndef __GAME_GAME_H__
#include	"game\game.h"
#endif

#ifndef	__UTILS_HEADER__
#include	"utils\utils.h"
#endif

#ifndef __VID_HEADER_
#include "system\vid.h"
#endif

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcCartPlatform::postInit()
{
	CNpcPlatform::postInit();

	m_npcPath.setPathType( CNpcPath::SINGLE_USE_PATH );

	m_carSpeed = m_speed << 8;
	m_isActivated = false;

	sBBox boundingBox = m_modelGfx->GetBBox();
	boundingBox.YMin = boundingBox.YMax - 32;
	setCollisionSize( ( boundingBox.XMax - boundingBox.XMin ), ( boundingBox.YMax - boundingBox.YMin ) );
	setCollisionCentreOffset( ( boundingBox.XMax + boundingBox.XMin ) >> 1, ( boundingBox.YMax + boundingBox.YMin ) >> 1 );
	calculateNonRotatedCollisionData();
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcCartPlatform::processMovement( int _frames )
{
	s32 fallSpeed = 2;
	s8 yMovement = fallSpeed * _frames;
	s32 distX, distY, heading;
	s32 groundHeight;
	s32 moveX = 0;
	s32 moveY = 0;

	bool pathComplete;

	if ( m_isActivated )
	{
		m_npcPath.thinkFlat( Pos, &pathComplete, &distX, &distY, &heading );

		if ( !pathComplete )
		{
			moveX = ( m_carSpeed >> 8 ) * _frames;

			if ( heading == 2048 )
			{
				moveX = -moveX;
			}
		}

		if ( m_inJump )
		{
			m_vertSpeed += 64;

			if ( m_vertSpeed > ( 5 << 8 ) )
			{
				m_vertSpeed = 5 << 8;
			}
			else if ( m_vertSpeed < -( 6 << 8 ) )
			{
				m_vertSpeed = -( 6 << 8 );
			}

			moveY = ( m_vertSpeed >> 8 ) * _frames;

			groundHeight = CGameScene::getCollision()->getHeightFromGround( Pos.vx + moveX, Pos.vy + moveY, 16 );

			if ( groundHeight < 0 )
			{
				// have touched down

				m_inJump = false;
				moveY += groundHeight;
			}
		}
		else
		{
			// check for vertical movement

			s32 checkDist = yMovement + 50;

			groundHeight = CGameScene::getCollision()->getHeightFromGround( Pos.vx + moveX, Pos.vy, checkDist );

			if ( groundHeight < checkDist )
			{
				// groundHeight <= yMovement indicates either just above ground or on or below ground

				moveY = groundHeight;
			}
			else
			{
				// fall

				moveY = yMovement;
			}

			if ( moveY < 0 )
			{
				m_carSpeed -= 1;

				if ( m_carSpeed < ( 2 << 8 ) )
				{
					m_carSpeed = ( 2 << 8 );
				}
			}
			else if ( moveY > 0 )
			{
				m_carSpeed += 20;

				if ( m_carSpeed > ( 6 << 8 ) )
				{
					m_carSpeed = ( 6 << 8 );
				}
			}
		}

		Pos.vx += moveX;
		Pos.vy += moveY;

		// sort out draw rotation

		DVECTOR testPos1, testPos2;

		testPos1 = testPos2 = Pos;
		testPos1.vx -= 10;
		testPos2.vx += 10;

		u8 sensorDist = 16;

		s32 yDiff;

		yDiff = CGameScene::getCollision()->getHeightFromGround( testPos1.vx, testPos1.vy, sensorDist + 1 );

		if ( yDiff <= sensorDist )
		{
			// only use if there is ground present

			testPos1.vy += yDiff;
		}

		yDiff = CGameScene::getCollision()->getHeightFromGround( testPos2.vx, testPos2.vy, sensorDist + 1 );

		if ( yDiff <= sensorDist )
		{
			// only use if there is ground present

			testPos2.vy += yDiff;
		}

		s32 xDist = testPos2.vx - testPos1.vx;
		s32 yDist = testPos2.vy - testPos1.vy;

		heading = ratan2( yDist, xDist );

		setCollisionAngle( heading );
	}
	else
	{
		groundHeight = CGameScene::getCollision()->getHeightFromGround( Pos.vx, Pos.vy, yMovement + 16 );

		if ( groundHeight <= yMovement )
		{
			moveY = groundHeight;
		}
		else
		{
			// fall

			moveY = yMovement;
		}

		Pos.vy += moveY;

		if ( m_contact )
		{
			m_isActivated = true;
		}
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcCartPlatform::render()
{
	if ( m_isActive )
	{
		CPlatformThing::render();

		if (canRender())
		{
			DVECTOR &renderPos=getRenderPos();
			SVECTOR rotation;

			rotation.vx = 0;
			rotation.vy = 0;
			rotation.vz = getCollisionAngle();

			VECTOR scale;
			scale.vx = ONE;
			scale.vy = ONE;
			scale.vz = ONE;

			m_modelGfx->Render(renderPos,&rotation,&scale);
		}
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcCartPlatform::jump()
{
	if ( !m_inJump )
	{
		m_inJump = true;
		m_vertSpeed = -6 << 8;
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcCartPlatform::collidedWith( CThing *_thisThing )
{
	switch(_thisThing->getThingType())
	{
		case TYPE_PLAYER:
		{
			CPlayer *player;
			DVECTOR	playerPos;
			CRECT	collisionArea;

			// Only interested in SBs feet colliding with the box (pkg)
			player=(CPlayer*)_thisThing;
			playerPos=player->getPos();
			collisionArea=getCollisionArea();

			s32 threshold = abs( collisionArea.y2 - collisionArea.y1 );

			if ( threshold > 16 )
			{
				threshold = 16;
			}

			if( playerPos.vx >= collisionArea.x1 && playerPos.vx <= collisionArea.x2 )
			{
				if ( checkCollisionDelta( _thisThing, threshold, collisionArea ) )
				{
					player->setPlatform( this );

					m_contact = true;
				}
				else
				{
					if( playerPos.vy >= collisionArea.y1 && playerPos.vy <= collisionArea.y2 )
					{
						if ( m_isActivated || player->getPosDelta().vy >= 0 )
						{
							int height = getHeightFromPlatformAtPosition( playerPos.vx, playerPos.vy );

							if ( height >= -threshold && height < 1 )
							{
								player->setPlatform( this );

								m_contact = true;
							}
						}
					}
				}
			}

			break;
		}

		case TYPE_NPC:
		case TYPE_HAZARD:
			break;

		default:
			ASSERT(0);
			break;
	}
}