From 88f499c95bad12ed2d04e1e67ca2c94b7dff8b64 Mon Sep 17 00:00:00 2001
From: Peter Wu <lekensteyn@gmail.com>
Date: Fri, 17 Jan 2014 18:41:26 +0100
Subject: Debug normalized curve lengths

Draw a cone showing every 5% of the track.
---
 src/RaceTrack.java | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/RaceTrack.java b/src/RaceTrack.java
index 0362f9a..5d531f4 100644
--- a/src/RaceTrack.java
+++ b/src/RaceTrack.java
@@ -191,6 +191,25 @@ class RaceTrack extends BetterBase {
                 "Multiple of three control points required";
         }
         drawTrack();
+
+        // debugging purposes: show track center and control points
+        if (debugBezierTracks && selectedControlPoints != null) {
+            drawCenterLineTrack(selectedControlPoints);
+
+            // show a marker every 5% of the track
+            double steps = 20;
+            gl.glPointSize(8);
+            for (int i = 0; i < steps; i++) {
+                // alternate colors
+                setColor(i % 2 == 0 ? Color.MAGENTA : Color.PINK);
+                Vector p = getPoint(i / steps);
+                // draw a marker
+                gl.glPushMatrix();
+                gl.glTranslated(p.x(), p.y(), p.z());
+                glut.glutSolidCone(0.4, 1.5, 8, 16);
+                gl.glPopMatrix();
+            }
+        }
     }
 
     /**
@@ -408,11 +427,6 @@ class RaceTrack extends BetterBase {
             point_B = point_D;
             point_G = point_H;
         }
-
-        // debugging purposes: show track center and control points
-        if (debugBezierTracks && selectedControlPoints != null) {
-            drawCenterLineTrack(selectedControlPoints);
-        }
     }
 
     /**
@@ -428,10 +442,11 @@ class RaceTrack extends BetterBase {
         // number of "u" units per segment
         double segment_size = 1.0 / number_of_segments;
 
+        gl.glPushMatrix();
         // put lines and dots above track
-        gl.glTranslated(0, 0, 1);
+        gl.glTranslated(0, 0, 0.5);
 
-        gl.glLineWidth(5);
+        gl.glLineWidth(2);
         gl.glBegin(GL_LINE_STRIP);
         for (double i = 0; i <= SEGMENTS; ++i) {
             double u = i / SEGMENTS;
@@ -460,7 +475,7 @@ class RaceTrack extends BetterBase {
         gl.glEnd();
 
         // restore position
-        gl.glTranslated(0, 0, -1);
+        gl.glPopMatrix();
     }
 
     /**
-- 
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