1 files changed, 10 insertions, 2 deletions
diff --git a/Smoke/renderer_gl.c b/Smoke/renderer_gl.c
index 9bbd754..57ed71f 100644
--- a/Smoke/renderer_gl.c
+++ b/Smoke/renderer_gl.c
@@ -764,12 +764,16 @@ static void render_streamlines(void)
   struct point p;
   struct fftw_real_xy *frame_history;
   fftw_real cell_x, cell_y;
+  float scale = 10.0f;
+
+  glLineWidth(2.5f);
 
   i = j = k = l = 0;
   DIM = fluids_get_dim();
   for (i = 0; i < get_cur_seedpoint(); i++)
   {
     p = get_seedpoint(i);
+    p.y = winHeight - p.y;
     
     glBegin(GL_LINE_STRIP);
 
@@ -783,15 +787,19 @@ static void render_streamlines(void)
       idx_x = round(p.x / cell_x);
       idx_y = round(p.y / cell_y);
 
-      idx = (int)(cell_x * cell_y);
+      idx = (idx_x + (idx_y * DIM)) % (DIM * DIM);
 
       vx = (float)frame_history->x[idx];
       vy = (float)frame_history->y[idx];
 
-      glVertex3f(p.x + (vx * 10000), winHeight - p.y + (vy * 10000), 0.0f - j * cell_x);
+      p.x += vx * cell_x * scale;
+      p.y += vy * cell_y * scale;
+
+      glVertex3f(p.x, p.y, j * cell_x);
     }
     glEnd();
   }
+  glLineWidth(1.0f);
 }
 
 static void render_flowvis(void)