make statefull engine trails

3 files changed, 10 insertions, 4 deletions

diff --git a/src/core/clientstate.cc b/src/core/clientstate.cc
index 503a71f..8e6606d 100644
--- a/src/core/clientstate.cc
+++ b/src/core/clientstate.cc
@@ -21,6 +21,7 @@ ClientState::ClientState()
 		state_screenlocation[i] = 0;
 
 	state_fuzz = math::randomf();
+	state_engine_trail_offset = 0;
 }
 
 ClientState::ClientState(Entity *entity)
diff --git a/src/core/clientstate.h b/src/core/clientstate.h
index 87dd1d7..91cd3e1 100644
--- a/src/core/clientstate.h
+++ b/src/core/clientstate.h
@@ -65,6 +65,7 @@ public:
 	bool			state_targetable;
 
 	float			state_fuzz;
+	float			state_engine_trail_offset;
 
 	size_t			state_enginesound;
 };
diff --git a/src/render/draw.cc b/src/render/draw.cc
index 01cddf3..7866dbe 100644
--- a/src/render/draw.cc
+++ b/src/render/draw.cc
@@ -607,7 +607,7 @@ void draw_pass_model_fragments()
 }
 
 /* draw model lights and engines */
-void draw_pass_model_fx()
+void draw_pass_model_fx(float elapsed)
 {
 	float t;
 
@@ -724,8 +724,12 @@ void draw_pass_model_fx()
 				float u = static_cast<core::EntityControlable *>(entity)->thrust();
 
 				if (u > 0) {
-					float fraction = (core::application()->time() + entity->state()->fuzz()) * 4.0f * u;
-					fraction = fraction - floorf(fraction);	
+					float fraction = entity->state()->state_engine_trail_offset;
+					fraction += elapsed * 4.0f * u;
+				
+					while (fraction - 1.0f > 0)
+						fraction -= 1.0f;
+					entity->state()->state_engine_trail_offset = fraction;
 
 					for(model::Model::Engines::iterator eit = entity->model()->engines().begin(); eit != entity->model()->engines().end(); eit++) {
 	
@@ -960,7 +964,7 @@ void draw(float seconds)
 	Dust::draw();			// draw spacedust
 
 	
-	draw_pass_model_fx();		// draw entity lights and engines
+	draw_pass_model_fx(seconds);		// draw entity lights and engines
 
 	gl::enable(GL_LIGHTING);
 	gl::enable(GL_RESCALE_NORMAL);