From 28d83930cdf2844b69ac9f51c05e68b41d121307 Mon Sep 17 00:00:00 2001
From: Wilrik de Loose <wilrik@wilrik.nl>
Date: Thu, 10 Jan 2008 23:50:12 +0000
Subject: betere streamlines

---
 Smoke/Week 2.suo    | Bin 78336 -> 78336 bytes
 Smoke/renderer_gl.c |  12 ++++++++++--
 Smoke/seedpoint.c   |   2 +-
 Smoke/seedpoint.h   |   2 +-
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/Smoke/Week 2.suo b/Smoke/Week 2.suo
index 0dce0af..7c0de3f 100644
Binary files a/Smoke/Week 2.suo and b/Smoke/Week 2.suo differ
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)
diff --git a/Smoke/seedpoint.c b/Smoke/seedpoint.c
index cf48160..98a7aff 100644
--- a/Smoke/seedpoint.c
+++ b/Smoke/seedpoint.c
@@ -127,7 +127,7 @@ void render_seedpoints(void)
   {
     float color_scale = (float)i/MAX_SEEDPOINTS;
 
-    glColor3f(color_scale, 1.0f - color_scale, 1.0f - color_scale);
+    glColor3f(color_scale, 1.0f - color_scale, 0.0f);
 
     glPushMatrix();
       glTranslatef(seedpoints[i].x, winHeight - seedpoints[i].y, seedpoints[i].z);
diff --git a/Smoke/seedpoint.h b/Smoke/seedpoint.h
index 557f59f..446f126 100644
--- a/Smoke/seedpoint.h
+++ b/Smoke/seedpoint.h
@@ -1,7 +1,7 @@
 #ifndef _SEEDPOINT_H
 #define _SEEDPOINT_H
 
-#define MAX_SEEDPOINTS 16
+#define MAX_SEEDPOINTS 8
 
 void create_seedpoint(float mx, float my);
 void delete_seedpoint(int seedpoint_nr);
-- 
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