btHeightFieldTerrainShape, init new member

instead height of example terrain

examples/Heightfield/HeightfieldExample.cpp

@@ -491,7 +491,7 @@ getRawHeightfieldData
                     for (int j = 0; j < width; ++j)
                     {
                         float y = j * s_gridSpacing;
-                        float z = double(image[i*3+width*j*3])*(4./256.);
+                        float z = double(image[i*3+width*j*3])*(40./256.);
                         convertFromFloat(p, z, type);
                         p += bytesPerElement;
                     }

src/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.cpp

@@ -21,6 +21,7 @@ btHeightfieldTerrainShape::btHeightfieldTerrainShape(
 	int heightStickWidth, int heightStickLength, const void* heightfieldData,
 	btScalar heightScale, btScalar minHeight, btScalar maxHeight, int upAxis,
 	PHY_ScalarType hdt, bool flipQuadEdges)
+	:m_userIndex2(-1)
 {
 	initialize(heightStickWidth, heightStickLength, heightfieldData,
 			   heightScale, minHeight, maxHeight, upAxis, hdt,
@@ -28,6 +29,7 @@ btHeightfieldTerrainShape::btHeightfieldTerrainShape(
 }
 
 btHeightfieldTerrainShape::btHeightfieldTerrainShape(int heightStickWidth, int heightStickLength, const void* heightfieldData, btScalar maxHeight, int upAxis, bool useFloatData, bool flipQuadEdges)
+	:m_userIndex2(-1)
 {
 	// legacy constructor: support only float or unsigned char,
 	// 	and min height is zero

src/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h

@@ -114,6 +114,8 @@ protected:
 	int m_vboundsGridLength;
 	int m_vboundsChunkSize;
 
+	int m_userIndex2;
+
 	virtual btScalar getRawHeightFieldValue(int x, int y) const;
 	void quantizeWithClamp(int* out, const btVector3& point, int isMax) const;
 
@@ -186,7 +188,7 @@ public:
 	//debugging
 	virtual const char* getName() const { return "HEIGHTFIELD"; }
 
-	int m_userIndex2;
+	
 	void setUserIndex2(int index)
 	{
 		m_userIndex2 = index;