source/hazard/hsaw.cpp

@@ -0,0 +1,113 @@
+/*=========================================================================
+
+	hsaw.cpp
+
+	Author:		CRB
+	Created: 
+	Project:	Spongebob
+	Purpose: 
+
+	Copyright (c) 2001 Climax Development Ltd
+
+===========================================================================*/
+
+#ifndef __HAZARD_HSAW_H__
+#include "hazard\hsaw.h"
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void CNpcSawbladeHazard::init()
+{
+	CNpcHazard::init();
+
+	DVECTOR newPos;
+
+	Pos.vx = 100;
+	Pos.vy = 100;
+	m_base = Pos;
+
+	newPos.vx = 300;
+	newPos.vy = 100;
+
+	m_npcPath.addWaypoint( newPos );
+
+	m_npcPath.setPathType( CNpcPath::SINGLE_USE_PATH );
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void CNpcSawbladeHazard::processMovement( int _frames )
+{
+	bool pathComplete;
+	bool waypointChange;
+
+	s16 headingToTarget = m_npcPath.think( Pos, &pathComplete, &waypointChange );
+
+	if ( !pathComplete )
+	{
+		s16 decDir, incDir, moveDist;
+		s16 maxTurnRate = 2048;
+		s32 moveX, moveY;
+
+		decDir = m_heading - headingToTarget;
+
+		if ( decDir < 0 )
+		{
+			decDir += ONE;
+		}
+
+		incDir = headingToTarget - m_heading;
+
+		if ( incDir < 0 )
+		{
+			incDir += ONE;
+		}
+
+		if ( decDir < incDir )
+		{
+			moveDist = -decDir;
+		}
+		else
+		{
+			moveDist = incDir;
+		}
+
+		if ( moveDist < -maxTurnRate )
+		{
+			moveDist = -maxTurnRate;
+		}
+		else if ( moveDist > maxTurnRate )
+		{
+			moveDist = maxTurnRate;
+		}
+
+		m_heading += moveDist;
+
+		m_heading &= 4095;
+
+		s32 preShiftX = _frames * 3 * rcos( m_heading );
+		s32 preShiftY = _frames * 3 * rsin( m_heading );
+
+		moveX = preShiftX >> 12;
+		if ( !moveX && preShiftX )
+		{
+			moveX = preShiftX / abs( preShiftX );
+		}
+
+		moveY = preShiftY >> 12;
+		if ( !moveY && preShiftY )
+		{
+			moveY = preShiftY / abs( preShiftY );
+		}
+
+		Pos.vx += moveX;
+		Pos.vy += moveY;
+	}
+	else
+	{
+		m_npcPath.resetPath();
+
+		Pos = m_base;
+	}
+}