(no commit message)
[atyndall/cits2231.git] / helper.c
index aebdaee..d7d418b 100644 (file)
--- a/helper.c
+++ b/helper.c
@@ -263,7 +263,7 @@ void drawLine() {
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glColor3f( 0.0, 0.0, 0.0 );
 
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glColor3f( 0.0, 0.0, 0.0 );
 
-  float arrowLength = 0.5;
+  float arrowLength = 0.3;
 
   glBegin(GL_LINES);
     // x arrow
 
   glBegin(GL_LINES);
     // x arrow
@@ -277,15 +277,16 @@ void drawLine() {
     glVertex3i(  lineLength, 0.0, 0.0 );
     glVertex3i(  lineLength - arrowLength, 0.0, -1.0 );
 
     glVertex3i(  lineLength, 0.0, 0.0 );
     glVertex3i(  lineLength - arrowLength, 0.0, -1.0 );
 
-    glVertex3i( -lineLength, 0.0, 0.0 );
-    glVertex3i( -lineLength + arrowLength, 0.0,  1.0 );
+    // z arrow
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i(  0.0, 0.0, -lineLength );
 
 
-    glVertex3i( -lineLength, 0.0, 0.0 );
-    glVertex3i( -lineLength + arrowLength, 0.0, -1.0 );
+    // z arrowheads
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i(  1.0, 0.0,  lineLength - arrowLength );
 
 
-    // z arrow
-    glVertex3i( 0.0, 0.0,  lineLength );
-    glVertex3i( 0.0, 0.0, -lineLength );
+    glVertex3i(  0.0, 0.0,  lineLength );
+    glVertex3i( -1.0, 0.0,  lineLength - arrowLength );
   glEnd();
 
   glDisable(GL_BLEND);
   glEnd();
 
   glDisable(GL_BLEND);

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