SBSPSS/source/enemy/nocto.cpp
Charles b5cf87e172
2001-02-06 16:12:56 +00:00

102 lines
1.8 KiB
C++

/*=========================================================================
nocto.cpp
Author: CRB
Created:
Project: Spongebob
Purpose:
Copyright (c) 2000 Climax Development Ltd
===========================================================================*/
#ifndef __ENEMY_NPC_H__
#include "enemy\npc.h"
#endif
#ifndef __GAME_GAME_H__
#include "game\game.h"
#endif
#ifndef __PLAYER_PLAYER_H__
#include "player\player.h"
#endif
void CNpc::processBabyOctopusMovementModifier( int _frames, s32 dist, s16 headingChange )
{
s32 newX, newY;
s32 preShiftX, preShiftY;
u16 octopusData[11] = { 96, 192, 256, 256, 256, 192, 192, 192, 128, 128, 96 };
u32 dataPoint;
m_movementTimer += _frames;
if ( m_movementTimer > ( 3 * GameState::getOneSecondInFrames() ) )
{
m_movementTimer = 0;
}
dataPoint = 10 * m_movementTimer;
if ( dataPoint != 0 )
{
dataPoint /= ( 3 * GameState::getOneSecondInFrames() );
}
s32 resistance;
s32 absVelocity = abs( m_velocity );
s32 reqVelocity = dist;
resistance = _frames * NPC_JELLYFISH_RESISTANCE;
if ( absVelocity < resistance )
{
resistance = absVelocity;
}
if ( absVelocity != 0 )
{
resistance = -( resistance * m_velocity ) / absVelocity;
}
else
{
resistance = 0;
}
m_velocity += resistance;
reqVelocity = dist * octopusData[dataPoint];
reqVelocity >>= 8;
reqVelocity *= 128 + ( 128 - headingChange );
reqVelocity >>= 8;
s32 absReqVelocity = abs( reqVelocity );
if ( absReqVelocity > absVelocity )
{
m_velocity += reqVelocity >> 1;
}
preShiftX = ( m_velocity >> 8 ) * rcos( m_heading );
preShiftY = ( m_velocity >> 8 ) * rsin( m_heading );
newX = preShiftX >> 12;
if ( !newX && preShiftX )
{
newX = preShiftX / abs( preShiftX );
}
newY = preShiftY >> 12;
if ( !newY && preShiftY )
{
newY = preShiftY / abs( preShiftY );
}
Pos.vx += newX;
Pos.vy += newY;
}