moved source and text to american spelling

* colour -> color
* centre -> center
* normalise -> normalize
* modelling -> modeling

14 files changed, 113 insertions, 113 deletions

diff --git a/source/gameengine/Converter/BL_BlenderDataConversion.cpp b/source/gameengine/Converter/BL_BlenderDataConversion.cpp
index a271ae14539..1e223d203b9 100644
--- a/source/gameengine/Converter/BL_BlenderDataConversion.cpp
+++ b/source/gameengine/Converter/BL_BlenderDataConversion.cpp
@@ -190,15 +190,15 @@ static unsigned int KX_rgbaint2uint_new(unsigned int icol)
 	{
 		unsigned int integer;
 		unsigned char cp[4];
-	} out_colour, in_colour;
+	} color, in_color;
 	
-	in_colour.integer = icol;
-	out_colour.cp[0] = in_colour.cp[3]; // red
-	out_colour.cp[1] = in_colour.cp[2]; // green
-	out_colour.cp[2] = in_colour.cp[1]; // blue
-	out_colour.cp[3] = in_colour.cp[0]; // alpha
+	in_color.integer = icol;
+	out_color.cp[0] = in_color.cp[3]; // red
+	out_color.cp[1] = in_color.cp[2]; // green
+	out_color.cp[2] = in_color.cp[1]; // blue
+	out_color.cp[3] = in_color.cp[0]; // alpha
 	
-	return out_colour.integer;
+	return out_color.integer;
 }
 
 /* Now the real converting starts... */
@@ -210,15 +210,15 @@ static unsigned int KX_Mcol2uint_new(MCol col)
 		MCol col;
 		unsigned int integer;
 		unsigned char cp[4];
-	} out_colour, in_colour;
+	} out_color, in_color;
 
-	in_colour.col = col;
-	out_colour.cp[0] = in_colour.cp[3]; // red
-	out_colour.cp[1] = in_colour.cp[2]; // green
-	out_colour.cp[2] = in_colour.cp[1]; // blue
-	out_colour.cp[3] = in_colour.cp[0]; // alpha
+	in_color.col = col;
+	out_color.cp[0] = in_color.cp[3]; // red
+	out_color.cp[1] = in_color.cp[2]; // green
+	out_color.cp[2] = in_color.cp[1]; // blue
+	out_color.cp[3] = in_color.cp[0]; // alpha
 	
-	return out_colour.integer;
+	return out_color.integer;
 }
 
 static void SetDefaultFaceType(Scene* scene)
@@ -247,7 +247,7 @@ static void GetRGB(short type,
 	unsigned int &c2, 
 	unsigned int &c3)
 {
-	unsigned int colour = 0xFFFFFFFFL;
+	unsigned int color = 0xFFFFFFFFL;
 	switch(type)
 	{
 		case 0:	// vertex colors
@@ -260,11 +260,11 @@ static void GetRGB(short type,
 					c3 = KX_Mcol2uint_new(mmcol[3]);
 			}else // backup white
 			{
-				c0 = KX_rgbaint2uint_new(colour);
-				c1 = KX_rgbaint2uint_new(colour);
-				c2 = KX_rgbaint2uint_new(colour);	
+				c0 = KX_rgbaint2uint_new(color);
+				c1 = KX_rgbaint2uint_new(color);
+				c2 = KX_rgbaint2uint_new(color);	
 				if (mface->v4)
-					c3 = KX_rgbaint2uint_new( colour );
+					c3 = KX_rgbaint2uint_new( color );
 			}
 		} break;
 		
@@ -280,22 +280,22 @@ static void GetRGB(short type,
 				col_converter.cp[2] = (unsigned char) (mat->g*255.0);
 				col_converter.cp[1] = (unsigned char) (mat->b*255.0);
 				col_converter.cp[0] = (unsigned char) (mat->alpha*255.0);
-				colour = col_converter.integer;
+				color = col_converter.integer;
 			}
-			c0 = KX_rgbaint2uint_new(colour);
-			c1 = KX_rgbaint2uint_new(colour);
-			c2 = KX_rgbaint2uint_new(colour);	
+			c0 = KX_rgbaint2uint_new(color);
+			c1 = KX_rgbaint2uint_new(color);
+			c2 = KX_rgbaint2uint_new(color);	
 			if (mface->v4)
-				c3 = KX_rgbaint2uint_new(colour);
+				c3 = KX_rgbaint2uint_new(color);
 		} break;
 		
 		default: // white
 		{
-			c0 = KX_rgbaint2uint_new(colour);
-			c1 = KX_rgbaint2uint_new(colour);
-			c2 = KX_rgbaint2uint_new(colour);	
+			c0 = KX_rgbaint2uint_new(color);
+			c1 = KX_rgbaint2uint_new(color);
+			c2 = KX_rgbaint2uint_new(color);	
 			if (mface->v4)
-				c3 = KX_rgbaint2uint_new(colour);
+				c3 = KX_rgbaint2uint_new(color);
 		} break;
 	}
 }
@@ -974,7 +974,7 @@ RAS_MeshObject* BL_ConvertMesh(Mesh* mesh, Object* blenderobj, RAS_IRenderTools*
 
 					if (mmcol)
 					{
-						// Use vertex colours
+						// Use vertex colors
 						rgb0 = KX_Mcol2uint_new(mmcol[0]);
 						rgb1 = KX_Mcol2uint_new(mmcol[1]);
 						rgb2 = KX_Mcol2uint_new(mmcol[2]);
@@ -985,7 +985,7 @@ RAS_MeshObject* BL_ConvertMesh(Mesh* mesh, Object* blenderobj, RAS_IRenderTools*
 					else {
 						// no vertex colors: take from material if we have one,
 						// otherwise set to white
-						unsigned int colour = 0xFFFFFFFFL;
+						unsigned int color = 0xFFFFFFFFL;
 
 						if (ma)
 						{
@@ -1000,15 +1000,15 @@ RAS_MeshObject* BL_ConvertMesh(Mesh* mesh, Object* blenderobj, RAS_IRenderTools*
 							col_converter.cp[1] = (unsigned char) (ma->b*255.0);
 							col_converter.cp[0] = (unsigned char) (ma->alpha*255.0);
 							
-							colour = col_converter.integer;
+							color = col_converter.integer;
 						}
 	
-						rgb0 = KX_rgbaint2uint_new(colour);
-						rgb1 = KX_rgbaint2uint_new(colour);
-						rgb2 = KX_rgbaint2uint_new(colour);	
+						rgb0 = KX_rgbaint2uint_new(color);
+						rgb1 = KX_rgbaint2uint_new(color);
+						rgb2 = KX_rgbaint2uint_new(color);	
 						
 						if (mface->v4)
-							rgb3 = KX_rgbaint2uint_new(colour);
+							rgb3 = KX_rgbaint2uint_new(color);
 					}
 					
 					bool istriangle = (mface->v4==0);
@@ -1304,7 +1304,7 @@ static void my_tex_space_mesh(Mesh *me)
 	
 }
 
-static void my_get_local_bounds(Object *ob, float *centre, float *size)
+static void my_get_local_bounds(Object *ob, float *center, float *size)
 {
 	BoundBox *bb= NULL;
 	/* uses boundbox, function used by Ketsji */
@@ -1321,7 +1321,7 @@ static void my_get_local_bounds(Object *ob, float *centre, float *size)
 		case OB_CURVE:
 		case OB_SURF:
 		case OB_FONT:
-			centre[0]= centre[1]= centre[2]= 0.0;
+			center[0]= center[1]= center[2]= 0.0;
 			size[0]  = size[1]=size[2]=0.0;
 			break;
 		case OB_MBALL:
@@ -1331,7 +1331,7 @@ static void my_get_local_bounds(Object *ob, float *centre, float *size)
 	
 	if(bb==NULL) 
 	{
-		centre[0]= centre[1]= centre[2]= 0.0;
+		center[0]= center[1]= center[2]= 0.0;
 		size[0] = size[1]=size[2]=1.0;
 	}
 	else 
@@ -1340,9 +1340,9 @@ static void my_get_local_bounds(Object *ob, float *centre, float *size)
 		size[1]= 0.5*fabs(bb->vec[0][1] - bb->vec[2][1]);
 		size[2]= 0.5*fabs(bb->vec[0][2] - bb->vec[1][2]);
 					
-		centre[0]= 0.5*(bb->vec[0][0] + bb->vec[4][0]);
-		centre[1]= 0.5*(bb->vec[0][1] + bb->vec[2][1]);
-		centre[2]= 0.5*(bb->vec[0][2] + bb->vec[1][2]);
+		center[0]= 0.5*(bb->vec[0][0] + bb->vec[4][0]);
+		center[1]= 0.5*(bb->vec[0][1] + bb->vec[2][1]);
+		center[2]= 0.5*(bb->vec[0][2] + bb->vec[1][2]);
 	}
 }
 	
@@ -1609,8 +1609,8 @@ static KX_GameObject *gameobject_from_blenderobject(
 	{
 		Mesh* mesh = static_cast<Mesh*>(ob->data);
 		RAS_MeshObject* meshobj = converter->FindGameMesh(mesh, ob->lay);
-		float centre[3], extents[3];
-		float radius = my_boundbox_mesh((Mesh*) ob->data, centre, extents);
+		float center[3], extents[3];
+		float radius = my_boundbox_mesh((Mesh*) ob->data, center, extents);
 		
 		if (!meshobj) {
 			meshobj = BL_ConvertMesh(mesh,ob,rendertools,kxscene,converter);
@@ -1641,8 +1641,8 @@ static KX_GameObject *gameobject_from_blenderobject(
 			((BL_DeformableGameObject*)gameobj)->m_pDeformer = dcont;
 		}
 		
-		MT_Point3 min = MT_Point3(centre) - MT_Vector3(extents);
-		MT_Point3 max = MT_Point3(centre) + MT_Vector3(extents);
+		MT_Point3 min = MT_Point3(center) - MT_Vector3(extents);
+		MT_Point3 max = MT_Point3(center) + MT_Vector3(extents);
 		SG_BBox bbox = SG_BBox(min, max);
 		gameobj->GetSGNode()->SetBBox(bbox);
 		gameobj->GetSGNode()->SetRadius(radius);
diff --git a/source/gameengine/Ketsji/KX_Camera.cpp b/source/gameengine/Ketsji/KX_Camera.cpp
index 674528f719c..011443054a7 100644
--- a/source/gameengine/Ketsji/KX_Camera.cpp
+++ b/source/gameengine/Ketsji/KX_Camera.cpp
@@ -48,10 +48,10 @@ KX_Camera::KX_Camera(void* sgReplicationInfo,
 					KX_GameObject(sgReplicationInfo,callbacks,T),
 					m_camdata(camdata),
 					m_dirty(true),
-					m_normalised(false),
+					m_normalized(false),
 					m_frustum_culling(frustum_culling && camdata.m_perspective),
 					m_set_projection_matrix(false),
-					m_set_frustum_centre(false)
+					m_set_frustum_center(false)
 {
 	// setting a name would be nice...
 	m_name = "cam";
@@ -120,7 +120,7 @@ void KX_Camera::SetProjectionMatrix(const MT_Matrix4x4 & mat)
 	m_projection_matrix = mat;
 	m_dirty = true;
 	m_set_projection_matrix = true;
-	m_set_frustum_centre = false;
+	m_set_frustum_center = false;
 }
 
 
@@ -132,7 +132,7 @@ void KX_Camera::SetModelviewMatrix(const MT_Matrix4x4 & mat)
 {
 	m_modelview_matrix = mat;
 	m_dirty = true;
-	m_set_frustum_centre = false;
+	m_set_frustum_center = false;
 }
 
 
@@ -216,12 +216,12 @@ void KX_Camera::ExtractClipPlanes()
 	m_planes[5] = m[3] - m[2];
 	
 	m_dirty = false;
-	m_normalised = false;
+	m_normalized = false;
 }
 
-void KX_Camera::NormaliseClipPlanes()
+void KX_Camera::NormalizeClipPlanes()
 {
-	if (m_normalised)
+	if (m_normalized)
 		return;
 	
 	for (unsigned int p = 0; p < 6; p++)
@@ -231,15 +231,15 @@ void KX_Camera::NormaliseClipPlanes()
 			m_planes[p] /= factor;
 	}
 	
-	m_normalised = true;
+	m_normalized = true;
 }
 
 void KX_Camera::ExtractFrustumSphere()
 {
-	if (m_set_frustum_centre)
+	if (m_set_frustum_center)
 		return;
 
-	// The most extreme points on the near and far plane. (normalised device coords)
+	// The most extreme points on the near and far plane. (normalized device coords)
 	MT_Vector4 hnear(1., 1., 0., 1.), hfar(1., 1., 1., 1.);
 	MT_Matrix4x4 clip_camcs_matrix = m_projection_matrix;
 	clip_camcs_matrix.invert();
@@ -252,16 +252,16 @@ void KX_Camera::ExtractFrustumSphere()
 	MT_Point3 nearpoint(hnear[0]/hnear[3], hnear[1]/hnear[3], hnear[2]/hnear[3]);
 	MT_Point3 farpoint(hfar[0]/hfar[3], hfar[1]/hfar[3], hfar[2]/hfar[3]);
 	
-	// Compute centre
-	m_frustum_centre = MT_Point3(0., 0.,
+	// Compute center
+	m_frustum_center = MT_Point3(0., 0.,
 		(nearpoint.dot(nearpoint) - farpoint.dot(farpoint))/(2.0*(m_camdata.m_clipend - m_camdata.m_clipstart)));
-	m_frustum_radius = m_frustum_centre.distance(farpoint);
+	m_frustum_radius = m_frustum_center.distance(farpoint);
 	
 	// Transform to world space.
-	m_frustum_centre = GetCameraToWorld()(m_frustum_centre);
+	m_frustum_center = GetCameraToWorld()(m_frustum_center);
 	m_frustum_radius /= fabs(NodeGetWorldScaling()[NodeGetWorldScaling().closestAxis()]);
 	
-	m_set_frustum_centre = true;
+	m_set_frustum_center = true;
 }
 
 bool KX_Camera::PointInsideFrustum(const MT_Point3& x)
@@ -308,15 +308,15 @@ int KX_Camera::BoxInsideFrustum(const MT_Point3 *box)
 	return INTERSECT;
 }
 
-int KX_Camera::SphereInsideFrustum(const MT_Point3& centre, const MT_Scalar &radius)
+int KX_Camera::SphereInsideFrustum(const MT_Point3& center, const MT_Scalar &radius)
 {
 	ExtractFrustumSphere();
-	if (centre.distance2(m_frustum_centre) > (radius + m_frustum_radius)*(radius + m_frustum_radius))
+	if (center.distance2(m_frustum_center) > (radius + m_frustum_radius)*(radius + m_frustum_radius))
 		return OUTSIDE;
 
 	unsigned int p;
 	ExtractClipPlanes();
-	NormaliseClipPlanes();
+	NormalizeClipPlanes();
 		
 	MT_Scalar distance;
 	int intersect = INSIDE;
@@ -324,7 +324,7 @@ int KX_Camera::SphereInsideFrustum(const MT_Point3& centre, const MT_Scalar &rad
 	//                                -radius                                      radius
 	for (p = 0; p < 6; p++)
 	{
-		distance = m_planes[p][0]*centre[0] + m_planes[p][1]*centre[1] + m_planes[p][2]*centre[2] + m_planes[p][3];
+		distance = m_planes[p][0]*center[0] + m_planes[p][1]*center[1] + m_planes[p][2]*center[2] + m_planes[p][3];
 		if (fabs(distance) <= radius)
 			intersect = INTERSECT;
 		else if (distance < -radius)
@@ -537,10 +537,10 @@ int KX_Camera::_setattr(const STR_String &attr, PyObject *pyvalue)
 }
 
 KX_PYMETHODDEF_DOC(KX_Camera, sphereInsideFrustum,
-"sphereInsideFrustum(centre, radius) -> Integer\n"
+"sphereInsideFrustum(center, radius) -> Integer\n"
 "\treturns INSIDE, OUTSIDE or INTERSECT if the given sphere is\n"
 "\tinside/outside/intersects this camera's viewing frustum.\n\n"
-"\tcentre = the centre of the sphere (in world coordinates.)\n"
+"\tcenter = the center of the sphere (in world coordinates.)\n"
 "\tradius = the radius of the sphere\n\n"
 "\tExample:\n"
 "\timport GameLogic\n\n"
@@ -554,18 +554,18 @@ KX_PYMETHODDEF_DOC(KX_Camera, sphereInsideFrustum,
 "\t\t# Sphere is outside frustum\n"
 )
 {
-	PyObject *pycentre;
+	PyObject *pycenter;
 	float radius;
-	if (PyArg_ParseTuple(args, "Of", &pycentre, &radius))
+	if (PyArg_ParseTuple(args, "Of", &pycenter, &radius))
 	{
-		MT_Point3 centre;
-		if (PyVecTo(pycentre, centre))
+		MT_Point3 center;
+		if (PyVecTo(pycenter, center))
 		{
-			return PyInt_FromLong(SphereInsideFrustum(centre, radius)); /* new ref */
+			return PyInt_FromLong(SphereInsideFrustum(center, radius)); /* new ref */
 		}
 	}
 
-	PyErr_SetString(PyExc_TypeError, "sphereInsideFrustum: Expected arguments: (centre, radius)");
+	PyErr_SetString(PyExc_TypeError, "sphereInsideFrustum: Expected arguments: (center, radius)");
 	
 	Py_Return;
 }
diff --git a/source/gameengine/Ketsji/KX_Camera.h b/source/gameengine/Ketsji/KX_Camera.h
index ed926f12123..60f0b107940 100644
--- a/source/gameengine/Ketsji/KX_Camera.h
+++ b/source/gameengine/Ketsji/KX_Camera.h
@@ -83,9 +83,9 @@ protected:
 	 */
 	bool         m_dirty;
 	/**
-	 * true if the frustum planes have been normalised.
+	 * true if the frustum planes have been normalized.
 	 */
-	bool         m_normalised;
+	bool         m_normalized;
 	
 	/**
 	 * View Frustum clip planes.
@@ -104,11 +104,11 @@ protected:
 	bool         m_set_projection_matrix;
 	
 	/**
-	 * The centre point of the frustum.
+	 * The center point of the frustum.
 	 */
-	MT_Point3    m_frustum_centre;
+	MT_Point3    m_frustum_center;
 	MT_Scalar    m_frustum_radius;
-	bool         m_set_frustum_centre;
+	bool         m_set_frustum_center;
 
 	/**
 	 * Python module doc string.
@@ -120,9 +120,9 @@ protected:
 	 */
 	void ExtractClipPlanes();
 	/**
-	 * Normalise the camera clip frames.
+	 * Normalize the camera clip frames.
 	 */
-	void NormaliseClipPlanes();
+	void NormalizeClipPlanes();
 	/**
 	 * Extracts the bound sphere of the view frustum.
 	 */
@@ -181,11 +181,11 @@ public:
 	/**
 	 * Tests if the given sphere is inside this camera's view frustum.
 	 *
-	 * @param centre The centre of the sphere, in world coordinates.
+	 * @param center The center of the sphere, in world coordinates.
 	 * @param radius The radius of the sphere.
 	 * @return INSIDE, INTERSECT, or OUTSIDE depending on the sphere's relation to the frustum.
 	 */
-	int SphereInsideFrustum(const MT_Point3& centre, const MT_Scalar &radius);
+	int SphereInsideFrustum(const MT_Point3& center, const MT_Scalar &radius);
 	/**
 	 * Tests the given eight corners of a box with the view frustum.
 	 *
diff --git a/source/gameengine/Ketsji/KX_CameraActuator.cpp b/source/gameengine/Ketsji/KX_CameraActuator.cpp
index dba4792c83c..9454e21132a 100644
--- a/source/gameengine/Ketsji/KX_CameraActuator.cpp
+++ b/source/gameengine/Ketsji/KX_CameraActuator.cpp
@@ -89,12 +89,12 @@ GetReplica(
 
 /* three functions copied from blender arith... don't know if there's an equivalent */
 
-static float Kx_Normalise(float *n)
+static float Kx_Normalize(float *n)
 {
 	float d;
 	
 	d= n[0]*n[0]+n[1]*n[1]+n[2]*n[2];
-	/* FLT_EPSILON is too large! A larger value causes normalise errors in a scaled down utah teapot */
+	/* FLT_EPSILON is too large! A larger value causes normalize errors in a scaled down utah teapot */
 	if(d>0.0000000000001) {
 		d= sqrt(d);
 
@@ -158,14 +158,14 @@ static void Kx_VecUpMat3(float *vec, float mat[][3], short axis)
 	mat[coz][0]= vec[0];
 	mat[coz][1]= vec[1];
 	mat[coz][2]= vec[2];
-	Kx_Normalise((float *)mat[coz]);
+	Kx_Normalize((float *)mat[coz]);
 	
 	inp= mat[coz][2];
 	mat[coy][0]= - inp*mat[coz][0];
 	mat[coy][1]= - inp*mat[coz][1];
 	mat[coy][2]= 1.0 - inp*mat[coz][2];
 
-	Kx_Normalise((float *)mat[coy]);
+	Kx_Normalize((float *)mat[coy]);
 	
 	Kx_Crossf(mat[cox], mat[coy], mat[coz]);
 	
diff --git a/source/gameengine/Ketsji/KX_Light.cpp b/source/gameengine/Ketsji/KX_Light.cpp
index 06a52c07b3f..4a92ea4ac13 100644
--- a/source/gameengine/Ketsji/KX_Light.cpp
+++ b/source/gameengine/Ketsji/KX_Light.cpp
@@ -191,12 +191,12 @@ int       KX_LightObject::_setattr(const STR_String& attr, PyObject *pyvalue)
 	{
 		if (attr == "colour" || attr == "color")
 		{
-			MT_Vector3 colour;
-			if (PyVecTo(pyvalue, colour))
+			MT_Vector3 color;
+			if (PyVecTo(pyvalue, color))
 			{
-				m_lightobj.m_red = colour[0];
-				m_lightobj.m_green = colour[1];
-				m_lightobj.m_blue = colour[2];
+				m_lightobj.m_red = color[0];
+				m_lightobj.m_green = color[1];
+				m_lightobj.m_blue = color[2];
 				return 0;
 			}
 			return 1;
diff --git a/source/gameengine/Ketsji/KX_MouseFocusSensor.cpp b/source/gameengine/Ketsji/KX_MouseFocusSensor.cpp
index 0d383376d87..431efa07e0a 100644
--- a/source/gameengine/Ketsji/KX_MouseFocusSensor.cpp
+++ b/source/gameengine/Ketsji/KX_MouseFocusSensor.cpp
@@ -164,7 +164,7 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
 	 * -> wcs_camcs_trafo ->
 	 * camCS - camera coordinates
 	 * -> camcs_clip_trafo ->
-	 * clipCS - normalised device coordinates?
+	 * clipCS - normalized device coordinates?
 	 * -> normview_win_trafo
 	 * winCS - window coordinates
 	 *
@@ -172,7 +172,7 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
 	 * the projection matrix. These are passed to the rasterizer, and
 	 * we store them in the camera for easy access.
 	 *
-	 * For normalised device coords (xn = x/w, yn = y/w/zw) the
+	 * For normalized device coords (xn = x/w, yn = y/w/zw) the
 	 * windows coords become (lb = left bottom)
 	 *
 	 * xwin = [(xn + 1.0) * width]/2 + x_lb
@@ -215,7 +215,7 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
 	float nearclip = 0.0;
 	float farclip = 1.0;
 
-	/*	build the from and to point in normalised device coordinates 
+	/*	build the from and to point in normalized device coordinates 
 	 *	Looks like normailized device coordinates are [-1,1] in x [-1,1] in y
 	 *	[0,-1] in z 
 	 *	
diff --git a/source/gameengine/Ketsji/KX_Scene.cpp b/source/gameengine/Ketsji/KX_Scene.cpp
index a5bbfa41e3e..996c605df21 100644
--- a/source/gameengine/Ketsji/KX_Scene.cpp
+++ b/source/gameengine/Ketsji/KX_Scene.cpp
@@ -919,9 +919,9 @@ void KX_Scene::MarkVisible(SG_Tree *node, RAS_IRasterizer* rasty, KX_Camera* cam
 	if (dotest && !node->inside( cam->NodeGetWorldPosition()))
 	{
 		MT_Scalar radius = node->Radius();
-		MT_Point3 centre = node->Centre();
+		MT_Point3 center = node->Center();
 		
-		intersect =  cam->SphereInsideFrustum(centre, radius); 
+		intersect =  cam->SphereInsideFrustum(center, radius); 
 		
 		if (intersect == KX_Camera::INTERSECT)
 		{
diff --git a/source/gameengine/Ketsji/KX_VertexProxy.cpp b/source/gameengine/Ketsji/KX_VertexProxy.cpp
index cacf3987e63..9c5f3f611b6 100644
--- a/source/gameengine/Ketsji/KX_VertexProxy.cpp
+++ b/source/gameengine/Ketsji/KX_VertexProxy.cpp
@@ -93,9 +93,9 @@ KX_VertexProxy::_getattr(const STR_String& attr)
   if (attr == "colour" || attr == "color")
   {
   	const unsigned char *colp = m_vertex->getRGBA();
-	MT_Vector4 colour(colp[0], colp[1], colp[2], colp[3]);
-	colour /= 255.0;
-  	return PyObjectFrom(colour);
+	MT_Vector4 color(colp[0], colp[1], colp[2], colp[3]);
+	color /= 255.0;
+  	return PyObjectFrom(color);
   }
   
   if (attr == "normal")
diff --git a/source/gameengine/Physics/Sumo/Fuzzics/include/SM_Object.h b/source/gameengine/Physics/Sumo/Fuzzics/include/SM_Object.h
index 1911e186a1c..8b70bbc5779 100644
--- a/source/gameengine/Physics/Sumo/Fuzzics/include/SM_Object.h
+++ b/source/gameengine/Physics/Sumo/Fuzzics/include/SM_Object.h
@@ -206,7 +206,7 @@ public:
 	void applyImpulse(const MT_Point3& attach, const MT_Vector3& impulse) ;
 	
 	/**
-	 * Applies an impulse through the centre of this object. (ie the angular
+	 * Applies an impulse through the center of this object. (ie the angular
 	 * velocity will not change.
 	 */
 	void applyCenterImpulse(const MT_Vector3& impulse);
diff --git a/source/gameengine/Physics/Sumo/Fuzzics/src/SM_Object.cpp b/source/gameengine/Physics/Sumo/Fuzzics/src/SM_Object.cpp
index fe1ac9becd9..c8a191cad0d 100644
--- a/source/gameengine/Physics/Sumo/Fuzzics/src/SM_Object.cpp
+++ b/source/gameengine/Physics/Sumo/Fuzzics/src/SM_Object.cpp
@@ -301,7 +301,7 @@ void SM_Object::dynamicCollision(const MT_Point3 &local2,
 			applyImpulse(local2 + getNextFrame().getPosition(), impulse * normal);
 		} else {
 			/**
-			 * Apply impulse through object centre. (no rotation.)
+			 * Apply impulse through object center. (no rotation.)
 			 */
 			impulse /= invMass;
 			applyCenterImpulse( impulse * normal ); 
diff --git a/source/gameengine/Rasterizer/RAS_IRasterizer.h b/source/gameengine/Rasterizer/RAS_IRasterizer.h
index 789b5eea21e..8ecc9e7ad05 100644
--- a/source/gameengine/Rasterizer/RAS_IRasterizer.h
+++ b/source/gameengine/Rasterizer/RAS_IRasterizer.h
@@ -207,7 +207,7 @@ public:
 	 *              2 quads
 	 * @param polymat (reserved)
 	 * @param useObjectColor will render the object using @param rgbacolor instead of 
-	 *  vertex colours.
+	 *  vertex colors.
 	 */
 	virtual void	IndexPrimitives( const vecVertexArray& vertexarrays,
 							const vecIndexArrays & indexarrays,
@@ -351,7 +351,7 @@ public:
 		bool perspective = true
 	)=0;
 	/**
-	 * Sets the specular colour component of the lighting equation.
+	 * Sets the specular color component of the lighting equation.
 	 */
 	virtual void	SetSpecularity(float specX,
 								   float specY,
@@ -363,14 +363,14 @@ public:
 	 */
 	virtual void	SetShinyness(float shiny)=0;
 	/**
-	 * Sets the diffuse colour component of the lighting equation.
+	 * Sets the diffuse color component of the lighting equation.
 	 */
 	virtual void	SetDiffuse(float difX,
 							   float difY,
 							   float difZ,
 							   float diffuse)=0;
 	/**
-	 * Sets the emissive colour component of the lighting equation.
+	 * Sets the emissive color component of the lighting equation.
 	 */ 
 	virtual void	SetEmissive(float eX,
 								float eY,
diff --git a/source/gameengine/SceneGraph/SG_BBox.cpp b/source/gameengine/SceneGraph/SG_BBox.cpp
index bc7d00327a9..6f06e9b0424 100644
--- a/source/gameengine/SceneGraph/SG_BBox.cpp
+++ b/source/gameengine/SceneGraph/SG_BBox.cpp
@@ -119,9 +119,9 @@ void SG_BBox::translate(const MT_Vector3& dx)
 
 void SG_BBox::scale(const MT_Vector3& size, const MT_Point3& point)
 {
-	MT_Vector3 centre = (m_max - m_min)/2. + point;
-	m_max = (m_max - centre)*size;
-	m_min = (m_min - centre)*size;
+	MT_Vector3 center = (m_max - m_min)/2. + point;
+	m_max = (m_max - center)*size;
+	m_min = (m_min - center)*size;
 }
 #endif
 
diff --git a/source/gameengine/SceneGraph/SG_Tree.cpp b/source/gameengine/SceneGraph/SG_Tree.cpp
index 947d771f06c..0bad621ff07 100644
--- a/source/gameengine/SceneGraph/SG_Tree.cpp
+++ b/source/gameengine/SceneGraph/SG_Tree.cpp
@@ -56,7 +56,7 @@ SG_Tree::SG_Tree(SG_Tree* left, SG_Tree* right) :
 		m_bbox += m_right->m_bbox;
 		m_right->m_parent = this;
 	}
-	m_centre = (m_bbox.m_min + m_bbox.m_max)/2.0;
+	m_center = (m_bbox.m_min + m_bbox.m_max)/2.0;
 	m_radius = (m_bbox.m_max - m_bbox.m_min).length();
 }
 	
@@ -66,7 +66,7 @@ SG_Tree::SG_Tree(SG_Node* client) :
 		m_client_object(client)
 {
 	m_bbox = SG_BBox(client->BBox(), client->GetWorldTransform());
-	m_centre = (m_bbox.m_min + m_bbox.m_max)/2.0;
+	m_center = (m_bbox.m_min + m_bbox.m_max)/2.0;
 	m_radius = (m_bbox.m_max - m_bbox.m_min).length();
 }
 
@@ -155,7 +155,7 @@ void SG_Tree::SetLeft(SG_Tree *left)
 {
 	m_left = left;
 	m_bbox += left->m_bbox;
-	m_centre = (m_bbox.m_min + m_bbox.m_max)/2.0;
+	m_center = (m_bbox.m_min + m_bbox.m_max)/2.0;
 	m_radius = (m_bbox.m_max - m_bbox.m_min).length();
 }
 
@@ -163,7 +163,7 @@ void SG_Tree::SetRight(SG_Tree *right)
 {
 	m_right = right;
 	m_bbox += right->m_bbox;
-	m_centre = (m_bbox.m_min + m_bbox.m_max)/2.0;
+	m_center = (m_bbox.m_min + m_bbox.m_max)/2.0;
 	m_radius = (m_bbox.m_max - m_bbox.m_min).length();
 }
 
diff --git a/source/gameengine/SceneGraph/SG_Tree.h b/source/gameengine/SceneGraph/SG_Tree.h
index 51eeec4f3e1..0877668c53d 100644
--- a/source/gameengine/SceneGraph/SG_Tree.h
+++ b/source/gameengine/SceneGraph/SG_Tree.h
@@ -52,7 +52,7 @@ class SG_Tree
 	SG_Tree* m_right;
 	SG_Tree* m_parent;
 	SG_BBox  m_bbox;
-	MT_Point3 m_centre;
+	MT_Point3 m_center;
 	MT_Scalar m_radius;
 	SG_Node* m_client_object;
 public:
@@ -101,7 +101,7 @@ public:
 	void SetLeft(SG_Tree *left);
 	void SetRight(SG_Tree *right);
 
-	MT_Point3 Centre() const { return m_centre; }
+	MT_Point3 Center() const { return m_center; }
 	MT_Scalar Radius() { return m_radius; }
 	
 	//friend class SG_TreeFactory;