source/enemy/ngary.cpp

@@ -15,15 +15,75 @@
 #include "enemy\npc.h"
 #endif
 
+#ifndef __GAME_GAME_H__
+#include "game\game.h"
+#endif
+
 
 void CNpc::processGaryMovement( int _frames )
 {
+	s8 multiplier = -1 + ( 2 * m_extension );
+	s32 maxHeight = 10;
+	s32 fallSpeed = 5;
+
+	// check vertical collision
+
 	if ( isCollisionWithGround() )
 	{
-		Pos.vx += _frames;
+		// check horizontal collision
+
+		if ( m_layerCollision->Get( ( Pos.vx + ( multiplier * _frames ) ) >> 4, ( Pos.vy - maxHeight ) >> 4 ) )
+		{
+			// reverse direction
+
+			m_extension = !m_extension;
+		}
+		else
+		{
+			s32 distY;
+			s32 lastPointY = 0;
+
+			for ( distY = 0 ; distY <= maxHeight ; distY++ )
+			{
+				if ( !m_layerCollision->Get( Pos.vx >> 4, ( Pos.vy - distY ) >> 4 ) )
+				{
+					break;
+				}
+				else
+				{
+					lastPointY--;
+				}
+			}
+
+			Pos.vy += lastPointY;
+
+			Pos.vx += multiplier * _frames;
+		}
 	}
 	else
 	{
-		Pos.vy += _frames;
+		if ( m_layerCollision->Get( Pos.vx >> 4, ( Pos.vy + ( fallSpeed * _frames ) ) >> 4 ) )
+		{
+			s32 distY;
+			s32 lastPointY = 0;
+
+			for ( distY = 1 ; distY <= _frames ; distY++ )
+			{
+				if ( m_layerCollision->Get( Pos.vx >> 4, ( Pos.vy + distY ) >> 4 ) )
+				{
+					break;
+				}
+				else
+				{
+					lastPointY++;
+				}
+			}
+
+			Pos.vy += lastPointY;
+		}
+		else
+		{
+			Pos.vy += fallSpeed * _frames;
+		}
 	}
 }

source/enemy/ngeneric.cpp

@@ -102,5 +102,5 @@ void CNpc::processGenericGetUserDist( int _frames, s32 *distX, s32 *distY )
 bool CNpc::isCollisionWithGround()
 {
 	ASSERT(m_layerCollision);
-	return m_layerCollision->Get(Pos.vx>>4,Pos.vy>>4);
+	return m_layerCollision->Get( Pos.vx >> 4, ( Pos.vy + 1 ) >>4 );
 }

source/enemy/npc.cpp

@@ -62,6 +62,8 @@ void CNpc::init()
 	m_velocity = 0;
 	m_extension = 0;
 
+	m_extension = EXTEND_RIGHT;
+
 	Pos.vx = 100;
 	Pos.vy = 100;