model API cleanup, render WORLDSCALE

6 files changed, 166 insertions, 195 deletions

diff --git a/src/render/camera.cc b/src/render/camera.cc
index 092cc26..ba82ea6 100644
--- a/src/render/camera.cc
+++ b/src/render/camera.cc
@@ -28,9 +28,6 @@ const float		pitch_free = -30.0f;
 const float 		pitch_track = -5.0f;
 const float 		pitch_overview = -5.0f;
 
-float			Camera::camera_frustum_size = 0.5f;
-float			Camera::camera_frustum_front = 1.0f;
-
 math::Vector3f 		Camera::camera_eye;
 math::Vector3f 		Camera::camera_target;
 math::Axis 		Camera::camera_axis;
@@ -52,9 +49,6 @@ float Camera::camera_zoom;
 
 void Camera::init()
 {
-	camera_frustum_size = 0.5f;
-	camera_frustum_front = 1.0f;
-
 	direction_current = 0;
 	direction_target = 0; 
 
@@ -92,9 +86,6 @@ void Camera::set_mode(Mode newmode) {
 	target_pitch = 0.0f;
 	distance = 0.4f;
 
-	camera_frustum_size = 0.5f;
-	camera_frustum_front = 1.0f;
-
 	camera_axis.clear();
 
 	if (camera_mode != Overview)
@@ -296,15 +287,17 @@ void Camera::frame(float seconds)
 				if (angle > MIN_DELTA)
 					camera_axis.rotate(n, -angle);
 			} 
-/*
+
 			if (core::localcontrol()->model()) {
- 				camera_target -= (core::localcontrol()->model()->maxbbox().x + core::localcontrol()->model()->radius() + 0.1f) * 0.5f * camera_axis.forward();
-				camera_target += (core::localcontrol()->model()->maxbbox().z + core::localcontrol()->model()->radius() + 0.1f) * 0.5f * camera_axis.up();
+				camera_target -= camera_axis.forward() * math::max(FRUSTUMFRONT / WORLDSCALE, core::localcontrol()->model()->maxbbox().x);
+				camera_target += camera_axis.up() * math::max(FRUSTUMFRONT / WORLDSCALE, core::localcontrol()->model()->maxbbox().z);
+			} else {
+				camera_target -= camera_axis.forward() * math::max (FRUSTUMFRONT / WORLDSCALE, FRUSTUMFRONT / WORLDSCALE + core::localcontrol()->radius());
+				camera_target += camera_axis.up() * math::max (FRUSTUMFRONT / WORLDSCALE, FRUSTUMFRONT / WORLDSCALE + core::localcontrol()->radius());
 			}
-*/
-			float f = ( camera_frustum_size/State::aspect() );
-			camera_target += camera_axis.up() * math::max(f, core::localcontrol()->radius());
-			distance = math::max(f, core::localcontrol()->radius()) + camera_zoom *  core::localcontrol()->radius();
+
+			distance = math::max (FRUSTUMFRONT / WORLDSCALE, FRUSTUMFRONT / WORLDSCALE + camera_zoom * core::localcontrol()->radius()) + 0.001f;
+
 		} else if (mode() == Free) {
 
 			camera_axis.assign(target_axis);
@@ -321,33 +314,24 @@ void Camera::frame(float seconds)
 			d = degrees180f(pitch_current - pitch_target);
 			pitch_current = degrees360f(pitch_current -  d * seconds);
 			camera_axis.change_pitch(pitch_current);
-			/*
-			// set distance and location
-			distance = camera_zoom *  core::localcontrol()->radius();
-			//distance += (2.0f*core::localcontrol()->radius()) / ( camera_frustum_size/State::aspect() );
-	
-			camera_target -= COS_PI_4 * (core::localcontrol()->model() ? core::localcontrol()->model()->maxbbox().x : core::localcontrol()->radius()) * camera_axis.forward();
-			camera_target += COS_PI_4 * (core::localcontrol()->model() ? core::localcontrol()->model()->maxbbox().z : core::localcontrol()->radius()) * camera_axis.up();			camera_target += camera_frustum_size/State::aspect() * target_axis.up();
-			*/
-			float f = ( camera_frustum_size/State::aspect() );
-			distance = f +  camera_zoom *  core::localcontrol()->radius();
+
+			distance = math::max (FRUSTUMFRONT / WORLDSCALE, FRUSTUMFRONT / WORLDSCALE + camera_zoom * core::localcontrol()->radius()) + 0.001f;
+
 		} else if (mode() == Cockpit) {
 
 			camera_axis.assign(target_axis);
 
 			if (core::localcontrol()->model()) {
-				camera_target += (core::localcontrol()->model()->maxbbox().x+0.05) *
+				camera_target += (core::localcontrol()->model()->maxbbox().x) *
 					core::localcontrol()->axis().forward();
 			} else  {
-				camera_target += (core::localcontrol()->radius() + 0.05) *
+				camera_target += (core::localcontrol()->radius()) *
 					core::localcontrol()->axis().forward();
 			}
-			distance = 0.0f;
+			distance = (FRUSTUMFRONT / WORLDSCALE) - 0.001f;
 		}
 	}
 
-	distance += camera_frustum_front;
-
 	// calculate eye position
 	camera_eye = camera_target - (distance * camera_axis.forward());
 }
@@ -358,7 +342,7 @@ void Camera::frustum()
 	gl::matrixmode(GL_PROJECTION);
 	gl::loadidentity();
 
-	gl::frustum(-camera_frustum_size, camera_frustum_size, -camera_frustum_size/State::aspect(), camera_frustum_size/State::aspect(), camera_frustum_front, 1023.0f);
+	gl::frustum(-FRUSTUMSIZE, FRUSTUMSIZE, -FRUSTUMSIZE/State::aspect(), FRUSTUMSIZE/State::aspect(), FRUSTUMFRONT, core::range::maxdistance * WORLDSCALE);
 	gl::matrixmode(GL_MODELVIEW);
 	gl::loadidentity();
 
@@ -371,7 +355,10 @@ void Camera::frustum()
 	matrix.assign(camera_axis);
 	gl::multmatrix(matrix.transpose());
 
+	gl::scale(4.0f, 4.0f, 4.0f);
+
 	gl::translate(-1.0f * camera_eye);
+
 }
 
 void Camera::frustum_default(float distance, float cx, float cy)
@@ -380,10 +367,11 @@ void Camera::frustum_default(float distance, float cx, float cy)
 	gl::matrixmode(GL_PROJECTION);
 	gl::loadidentity();
 
+	// move eye to (cx, cy)
 	// note: the factor 2.0f probably has to be 1.0f/frustum_size
 	gl::translate(2.0f*(-State::width() * 0.5f + cx)/State::width() , 2.0f*(State::height() * 0.5f - cy)/State::height(), 0.0f);
 
-	gl::frustum(-camera_frustum_size, camera_frustum_size, -camera_frustum_size/State::aspect(), camera_frustum_size/State::aspect(), camera_frustum_front, 1023.0f);
+	gl::frustum(-FRUSTUMSIZE, FRUSTUMSIZE, -FRUSTUMSIZE/State::aspect(), FRUSTUMSIZE/State::aspect(), FRUSTUMFRONT, 1023.0f);
 
 	gl::matrixmode(GL_MODELVIEW);
 	gl::loadidentity();
@@ -426,14 +414,4 @@ void Camera::reset()
 	set_mode(camera_mode);
 }
 
-float Camera::frustum_front()
-{
-	return camera_frustum_front;
-}
-
-float Camera::frustum_size()
-{
-	return camera_frustum_size;
-}
-
 }
diff --git a/src/render/camera.h b/src/render/camera.h
index 349aef8..49cba74 100644
--- a/src/render/camera.h
+++ b/src/render/camera.h
@@ -8,9 +8,15 @@
 #define __INCLUDED_RENDER_CAMERA_H__
 
 #include "math/mathlib.h"
+#include "core/range.h"
 
 namespace render {
 
+const float WORLDSCALE = 4.0f;
+const float FARPLANE = core::range::maxdistance;
+const float FRUSTUMSIZE = 0.5f;
+const float FRUSTUMFRONT = 1.0f;
+
 /// camera functions
 class Camera
 {
@@ -76,20 +82,13 @@ public:
 	/// set specified camera mode
 	static void set_mode(Mode newmode);
 
-	/// current frustum front
-	static float frustum_front();
-
-	/// current frustum size (height);
-	static float frustum_size();
-
 private:
 	static math::Vector3f 		camera_eye;
 	static math::Vector3f 		camera_target;
 	static math::Axis 		camera_axis;
 	static Mode 			camera_mode;
 	static Mode			camera_previous_mode;
-	static float 			camera_frustum_size;
-	static float 			camera_frustum_front;
+
 
 	// current and target yaw angle in XZ plane, positive is looking left
 	static float direction_current;
diff --git a/src/render/draw.cc b/src/render/draw.cc
index 4768b7d..a48908f 100644
--- a/src/render/draw.cc
+++ b/src/render/draw.cc
@@ -58,6 +58,24 @@ void pass_prepare(float seconds)
 {
 	using namespace model;
 
+	// lighting settings for the default light GL_LIGHT0
+ 	GLfloat light_position[] = { 0.0, 0.0, 0.0, 1.0 };
+	GLfloat ambient_light[] = { 0.01f, 0.01f, 0.01f, 1.0f };
+	GLfloat diffuse_light[] = { 0.2f, 0.2f, 0.2f, 1.0f };
+	GLfloat specular_light[] = { 0.2f, 0.2f, 0.2f, 1.0f };
+
+	for (size_t i=0; i <3; i++) {
+		light_position[i] = Camera::eye()[i];		
+	}
+	
+	glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient_light);
+	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse_light);
+	glLightfv(GL_LIGHT0, GL_SPECULAR, specular_light);
+
+	// GL_LIGHT0 is always enabled
+	gl::enable(GL_LIGHT0);
+
 	// reset light state
 	gl::disable(GL_LIGHT1);
 	has_zone_light = false;
@@ -206,10 +224,10 @@ void draw_globe(core::EntityGlobe *globe)
 		gl::enable(GL_TEXTURE_2D);
 	}
 
-	if (ext_render(globe)->distance() > farplane) {
+	if (ext_render(globe)->distance() > (FARPLANE - globe->radius())) {
 		// globe is behind the far plane, make a fake size calculation
-		location = Camera::eye() + (location - Camera::eye()) * (farplane / ext_render(globe)->distance());
-		radius  *= farplane / ext_render(globe)->distance();
+		location = Camera::eye() + (location - Camera::eye()) * (FARPLANE / ext_render(globe)->distance());
+		radius  *= FARPLANE / ext_render(globe)->distance();
 
 		gl::depthmask(GL_FALSE);
 
@@ -287,7 +305,7 @@ void draw_globe(core::EntityGlobe *globe)
 	}
 
 
-	if (ext_render(globe)->distance() > farplane) {
+	if (ext_render(globe)->distance() > (FARPLANE - globe->radius())) {
 
 		gl::depthmask(GL_TRUE);
 
@@ -861,7 +879,6 @@ void draw_pass_model_fx(float elapsed)
 	float a = 0.0f;
 	float light_size = 0.0f;
 	bool power = true;
-	bool draw_quad = true;
 	float thrust = 0.0f;
 
 	math::Vector3f location;
@@ -897,7 +914,6 @@ void draw_pass_model_fx(float elapsed)
 			// draw model lights		
 			for (model::Model::Lights::iterator lit = entity->model()->lights().begin(); lit != entity->model()->lights().end(); lit++) {
 				model::Light *light = (*lit);
-				draw_quad = true;
 
 				// engine activated lights
 				if (light->engine()) {
@@ -908,66 +924,62 @@ void draw_pass_model_fx(float elapsed)
 						} else {
 							thrust = ec->thrust();
 							if (thrust < 0.001f) {
-								draw_quad = false;
+								continue;	// next light
 							}
 						}
 					} else {
-						draw_quad = false;
+						continue;	// next light
 					}
 				}
 
 				// strobe frequency
-				if (draw_quad && light->strobe()) {
-
+				if (light->strobe()) {
 					t = (core::application()->time() + ext_render(entity)->fuzz() - light->offset()) * light->frequency();
 					if ((t - floorf(t)) > light->time()) {
-						draw_quad = false;
+						continue;	// next light
 					}
 				}
 
-				// draw visible lights
-				if (draw_quad) {
-					// default alpha is 0.8
-					a = 0.8f;
-					if (light->entity()) {
-						color.assign(entity->color());
-					} else if (light->engine()) {
-						color.assign(entity->model()->enginecolor());
-						a *= thrust;
-					} else {
-						color.assign(light->color());
-					}
-					color.a = a;
-				
-					location.assign(entity->location() + (entity->axis() * light->location()));
-					light_size = 0.0625f * light->radius();
-
-					// track OpenGL state changes
-					if (current_texture != light->texture()) {
-						gl::end();
-						current_texture = Textures::bind(light->texture());
-						gl::begin(gl::Quads);
-					}
-
-					// draw the quad
-					gl::color(color);
-					
-					glTexCoord2f(0,1);
-					gl::vertex(location + (Camera::axis().up() - Camera::axis().left()) * light_size);
-					glTexCoord2f(0,0);
-					gl::vertex(location + (Camera::axis().up() + Camera::axis().left()) * light_size);
-					glTexCoord2f(1,0);
-					gl::vertex(location + (Camera::axis().up() * -1 + Camera::axis().left()) * light_size);
-					glTexCoord2f(1,1);
-					gl::vertex(location + (Camera::axis().up() * -1 - Camera::axis().left()) * light_size);
-					Stats::quads++;
+				// default alpha is 0.8
+				a = 0.8f;
+				if (light->entity()) {
+					color.assign(entity->color());
+				} else if (light->engine()) {
+					color.assign(entity->model()->enginecolor());
+					a *= thrust;
+				} else {
+					color.assign(light->color());
 				}
+				color.a = a;
+			
+				location.assign(entity->location() + (entity->axis() * light->location()));
+				light_size = 0.0625f * light->radius();
+
+				// track OpenGL state changes
+				if (current_texture != light->texture()) {
+					gl::end();
+					current_texture = Textures::bind(light->texture());
+					gl::begin(gl::Quads);
+				}
+
+				// draw the quad
+				gl::color(color);
+				
+				glTexCoord2f(0,1);
+				gl::vertex(location + (Camera::axis().up() - Camera::axis().left()) * light_size);
+				glTexCoord2f(0,0);
+				gl::vertex(location + (Camera::axis().up() + Camera::axis().left()) * light_size);
+				glTexCoord2f(1,0);
+				gl::vertex(location + (Camera::axis().up() * -1 + Camera::axis().left()) * light_size);
+				glTexCoord2f(1,1);
+				gl::vertex(location + (Camera::axis().up() * -1 - Camera::axis().left()) * light_size);
+				Stats::quads++;
+				
 			}
 			
 			// draw flares
 			for (model::Model::Flares::iterator flit = entity->model()->flares().begin(); flit != entity->model()->flares().end(); flit++) {
 				model::Flare *flare = (*flit);
-				draw_quad = true;
 
 				// engine activated flares
 				if (flare->engine()) {
@@ -978,95 +990,87 @@ void draw_pass_model_fx(float elapsed)
 						} else {
 							thrust = ec->thrust();
 							if (thrust < 0.001f) {
-								draw_quad = false;
+								continue;	// next flare
 							}
 						}
 					} else {
-						draw_quad = false;
+						continue;	// next flare
 					}
 				}
 
 				// strobe frequency
-				if (draw_quad && flare->strobe()) {
-
+				if (flare->strobe()) {
 					t = (core::application()->time() + ext_render(entity)->fuzz() - flare->offset()) * flare->frequency();
 					if ((t - floorf(t)) > flare->time()) {
-						draw_quad = false;
+						continue;	// next flare
 					}
 				}
 
 				// calulcate viewing angle factor
-				if (draw_quad) {
-					flare_axis.assign(entity->axis() * flare->axis());
-					a = math::absf(dotproduct(flare_axis.forward(), Camera::axis().forward()));
-
-					if (a < 0.01f) {
-						draw_quad = false;
-					}
+				flare_axis.assign(entity->axis() * flare->axis());
+				a = math::absf(dotproduct(flare_axis.forward(), Camera::axis().forward()));
+				if (a < 0.01f) {
+					continue;	// next flare
 				}
 
-				// draw visible flares
-				if (draw_quad) {
+				// alpha decreases with viewing angle
+				a *= 0.8f;
+				if (flare->entity()) {
+					color.assign(entity->color());
+				} else if (flare->engine()) {
+					color.assign(entity->model()->enginecolor());
+					a *= thrust;
+				} else {
+					color.assign(flare->color());
+				}
+				color.a = a;
 
-					// alpha decreases with viewing angle
-					a *= 0.8f;
-					if (flare->entity()) {
-						color.assign(entity->color());
-					} else if (flare->engine()) {
-						color.assign(entity->model()->enginecolor());
-						a *= thrust;
-					} else {
-						color.assign(flare->color());
-					}
-					color.a = a;
+				location.assign(entity->location() + (entity->axis() * flare->location()));
+				light_size = 0.0625f * flare->radius();
 
-					location.assign(entity->location() + (entity->axis() * flare->location()));
-					light_size = 0.0625f * flare->radius();
+				// track OpenGL state changes
+				if ((current_cull != flare->cull()) || (current_texture != flare->texture())) {
+					gl::end();
 
-					// track OpenGL state changes
-					if ((current_cull != flare->cull()) || (current_texture != flare->texture())) {
-						gl::end();
+					if (current_texture != flare->texture()) {
+						current_texture = Textures::bind(flare->texture());		
+					}
 
-						if (current_texture != flare->texture()) {
-							current_texture = Textures::bind(flare->texture());		
-						}
+					if (current_cull != flare->cull()) {
+						if (flare->cull() == model::CullNone) {
+							gl::disable(GL_CULL_FACE);
+							current_cull = model::CullNone;
+						} else {
+							if (current_cull == model::CullNone) {
+								gl::enable(GL_CULL_FACE);
+							}
 
-						if (current_cull != flare->cull()) {
-							if (flare->cull() == model::CullNone) {
-								gl::disable(GL_CULL_FACE);
-								current_cull = model::CullNone;
+							if (flare->cull() == model::CullBack) {
+								gl::cullface(GL_BACK);
+								current_cull = model::CullBack;
 							} else {
-								if (current_cull == model::CullNone) {
-									gl::enable(GL_CULL_FACE);
-								}
-
-								if (flare->cull() == model::CullBack) {
-									gl::cullface(GL_BACK);
-									current_cull = model::CullBack;
-								} else {
-									gl::cullface(GL_FRONT);
-									current_cull = model::CullFront;
-								}
+								gl::cullface(GL_FRONT);
+								current_cull = model::CullFront;
 							}
 						}
-
-						gl::begin(gl::Quads);
 					}
 
-					// draw the quad
-					gl::color(color);
-					
-					glTexCoord2f(0,1);
-					gl::vertex(location + (flare_axis.up() + flare_axis.left()) * light_size);
-					glTexCoord2f(0,0);
-					gl::vertex(location + (flare_axis.up() - flare_axis.left()) * light_size);
-					glTexCoord2f(1,0);
-					gl::vertex(location + (flare_axis.up() * -1 - flare_axis.left()) * light_size);
-					glTexCoord2f(1,1);
-					gl::vertex(location + (flare_axis.up() * -1 + flare_axis.left()) * light_size);
-
-					Stats::quads++;
+					gl::begin(gl::Quads);
 				}
+
+				// draw the quad
+				gl::color(color);
+				
+				glTexCoord2f(0,1);
+				gl::vertex(location + (flare_axis.up() + flare_axis.left()) * light_size);
+				glTexCoord2f(0,0);
+				gl::vertex(location + (flare_axis.up() - flare_axis.left()) * light_size);
+				glTexCoord2f(1,0);
+				gl::vertex(location + (flare_axis.up() * -1 - flare_axis.left()) * light_size);
+				glTexCoord2f(1,1);
+				gl::vertex(location + (flare_axis.up() * -1 + flare_axis.left()) * light_size);
+
+				Stats::quads++;
 			}
 
 			gl::end();
@@ -1207,24 +1211,18 @@ void draw(float seconds)
 
 	gl::enable(GL_CULL_FACE);	// enable culling
 	gl::enable(GL_COLOR_MATERIAL);	// enable color tracking
-	gl::enable(GL_LIGHTING);	
-	//gl::enable(GL_RESCALE_NORMAL);	// rescale normals by the transformation matrix scale factor
-	gl::enable(GL_NORMALIZE);
-	
 
+	gl::enable(GL_LIGHTING);	// enable lighting
+	gl::enable(GL_NORMALIZE);	// enable rescaling of normals
+	
 	draw_pass_globes();		// draw globes
 
 	draw_pass_default();		// draw entities without model
-	
-	gl::disable(GL_NORMALIZE);
-	//gl::disable(GL_RESCALE_NORMAL);
-
-//	glEnableClientState(GL_COLOR_ARRAY);
 
 	draw_pass_model_fragments();
 
-//	glDisableClientState(GL_COLOR_ARRAY);
-	gl::disable(GL_LIGHTING);
+	gl::disable(GL_NORMALIZE);	// disable resaling of normals
+	gl::disable(GL_LIGHTING);	// disable lighting
 	
 	gl::enable(GL_BLEND);
 	gl::depthmask(GL_FALSE);	// disable depth buffer writing
diff --git a/src/render/render.h b/src/render/render.h
index a453464..3d07796 100644
--- a/src/render/render.h
+++ b/src/render/render.h
@@ -56,10 +56,6 @@ namespace render {
 	extern core::Cvar *r_mipmap;
 
 	inline RenderExt *ext_render(core::Entity *entity) { return static_cast<RenderExt *>(entity->extension((size_t)core::Extension::Render)); }
-
-	const float drawdistance = 256.0f;
-	const float drawfxdistance = 64.0f;
-	const float farplane = 1016.0f;
 }
 
 
diff --git a/src/render/renderext.cc b/src/render/renderext.cc
index 6a59870..b0462d4 100644
--- a/src/render/renderext.cc
+++ b/src/render/renderext.cc
@@ -107,20 +107,34 @@ void RenderExt::frame(float elapsed)
 	if ((entity()->type() == core::Entity::Controlable)) {
 		if (static_cast<core::EntityDynamic *>(entity())->state() == core::Entity::Docked) {
 			state_visible = false;
+			return;
 		}
 	}
 
 	if (state_visible && entity()->model()) {
-		float r = entity()->model()->radius();
-		math::clamp(r, 1.0f, farplane / drawfxdistance);
-		if (distance() <  drawfxdistance * r)  {
+
+		if (distance() < core::range::fxdistance) {
 			// entity within detail range
 			state_visible = true;
 			state_detailvisible = true;
-		} else if ((distance() <  drawdistance * r) && (distance() < core::range::max)) {
+
+		} else if (distance() < core::range::maxvisible) {
 			// entity within drawing distance, outside detail range
 			state_visible = true;
 			state_detailvisible = false;
+
+		} else if (distance() < core::range::maxdistance) {
+
+			if ((entity()->type() == core::Entity::Controlable)) {
+				// controlable entity out of range
+				state_visible = false;
+				state_detailvisible = false;
+			} else {
+				// entity within drawing distance, outside detail range
+				state_visible = true;
+				state_detailvisible = false;
+
+			}
 		} else {
 			// entity out of range
 			state_visible = false;
diff --git a/src/render/state.cc b/src/render/state.cc
index 2bf50af..96c7c0a 100644
--- a/src/render/state.cc
+++ b/src/render/state.cc
@@ -79,20 +79,6 @@ void State::clear()
 	gl::shademodel(GL_SMOOTH);
 	//gl::shademodel(GL_FLAT);
 
-	// lighting settings for the default light GL_LIGHT0
- 	GLfloat light_position[] = { 0.0, 0.0, 0.0, 1.0 };
-	GLfloat ambient_light[] = { 0.01f, 0.01f, 0.01f, 1.0f };
-	GLfloat diffuse_light[] = { 0.2f, 0.2f, 0.2f, 1.0f };
-	GLfloat specular_light[] = { 0.2f, 0.2f, 0.2f, 1.0f };
-	
-	glLightfv(GL_LIGHT0, GL_POSITION, light_position);
-	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient_light);
-	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse_light);
-	glLightfv(GL_LIGHT0, GL_SPECULAR, specular_light);
-
-	// GL_LIGHT0 is always enabled
-	gl::enable(GL_LIGHT0);
-
 	// color tracking
 	glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);