source/enemy/nsjfish.cpp

@@ -0,0 +1,233 @@
+/*=========================================================================
+
+	nsjfish.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::processSmallJellyfishMovementModifier( int _frames, s32 distX, s32 distY, s32 dist, s16 headingChange )
+{
+	s32 newX, newY;
+	s32 preShiftX, preShiftY;
+
+	u16 jellyfishData[5] = { 96, 192, 256, 192, 128, };
+
+	u32 dataPoint;
+
+	m_movementTimer += _frames;
+
+	if ( m_movementTimer > GameState::getOneSecondInFrames() )
+	{
+		m_movementTimer = 0;
+	}
+
+	dataPoint = 4 * m_movementTimer;
+
+	if ( dataPoint != 0 )
+	{
+		dataPoint /= 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 * jellyfishData[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;
+}
+
+void CNpc::processCloseSmallJellyfishEvade( int _frames )
+{
+	s32 moveX = 0, moveY = 0;
+
+	s16 moveDist = 0;
+
+	s32 moveVel = 0;
+
+	CPlayer *player = GameScene.getPlayer();
+
+	DVECTOR playerPos = player->getPos();
+
+	s32 xDist, yDist;
+	s32 xDistSqr, yDistSqr;
+
+	xDist = playerPos.vx - this->Pos.vx;
+	xDistSqr = xDist * xDist;
+
+	yDist = playerPos.vy - this->Pos.vy;
+	yDistSqr = yDist * yDist;
+
+	if ( xDistSqr + yDistSqr > 22500 )
+	{
+		this->m_controlFunc = NPC_CONTROL_MOVEMENT;
+	}
+	else
+	{
+		bool pathComplete;
+
+		s16 headingToTarget = m_npcPath.think( Pos, &pathComplete );
+
+		if ( pathComplete )
+		{
+			this->m_controlFunc = NPC_CONTROL_MOVEMENT;
+		}
+		else
+		{
+			s16 headingToPlayer = ratan2( yDist, xDist );
+
+			if ( m_evadeClockwise )
+			{
+				headingToPlayer += 1024;
+			}
+			else
+			{
+				headingToPlayer -= 1024;
+			}
+
+			headingToPlayer %= ONE;
+
+			s16 decDir, incDir;
+
+			decDir = headingToPlayer - headingToTarget;
+
+			if ( decDir < 0 )
+			{
+				decDir += ONE;
+			}
+
+			incDir = headingToTarget - headingToPlayer;
+
+			if ( incDir < 0 )
+			{
+				incDir += ONE;
+			}
+
+			if ( decDir < incDir )
+			{
+				moveDist = decDir;
+			}
+			else
+			{
+				moveDist = incDir;
+			}
+
+			if ( moveDist < 128 )
+			{
+				// evasion angle is close to angle required to go to waypoint, hence resume waypoint movement
+
+				this->m_controlFunc = NPC_CONTROL_MOVEMENT;
+				this->m_timerFunc = NPC_TIMER_EVADE_DONE;
+				this->m_timerTimer = GameState::getOneSecondInFrames();
+				this->m_sensorFunc = NPC_SENSOR_NONE;
+			}
+			else
+			{
+				decDir = m_heading - headingToPlayer;
+
+				if ( decDir < 0 )
+				{
+					decDir += ONE;
+				}
+
+				incDir = headingToPlayer - m_heading;
+
+				if ( incDir < 0 )
+				{
+					incDir += ONE;
+				}
+
+				if ( decDir < incDir )
+				{
+					moveDist = -decDir;
+				}
+				else
+				{
+					moveDist = incDir;
+				}
+
+				if ( moveDist < -128 )
+				{
+					moveDist = -128;
+				}
+				else if ( moveDist > 128 )
+				{
+					moveDist = 128;
+				}
+
+				m_heading += moveDist;
+
+				m_heading = m_heading % ONE;
+				
+				moveX = ( _frames * 3 * rcos( m_heading ) ) >> 12;
+				moveY = ( _frames * 3 * rsin( m_heading ) ) >> 12;
+				moveVel = ( _frames * 3 ) << 8;
+
+				processMovementModifier(_frames, moveX, moveY, moveVel, moveDist);
+			}
+		}
+	}
+}