On a second thought, disable smooth shaded lines for all segments of the lightning.

diff --git a/simgear/environment/visual_enviro.cxx b/simgear/environment/visual_enviro.cxx
index 78fd6eb5090b45fad58be3343cc26a89cd068754..6ea17f80540e8388b42bb6307cfd13783c8e589e 100644 (file)
--- a/simgear/environment/visual_enviro.cxx
+++ b/simgear/environment/visual_enviro.cxx
@@ -558,11 +558,12 @@ void SGLightning::lt_Render(void) {
        sgVec4 c;
 
 #define DRAW_SEG() \
-                       {glBegin(GL_LINES); \
+                       {glColorMaterial(GL_FRONT, GL_EMISSION);  \
+                       glDisable(GL_LINE_SMOOTH); glBegin(GL_LINES); \
                                glColor4fv(c); \
                 glVertex3f(lt_tree[n].pt[PX], lt_tree[n].pt[PZ], lt_tree[n].pt[PY]); \
                 glVertex3f(lt_tree[lt_tree[n].prev].pt[PX], lt_tree[lt_tree[n].prev].pt[PZ], lt_tree[lt_tree[n].prev].pt[PY]); \
-                       glEnd();}
+                       glEnd(); glEnable(GL_LINE_SMOOTH);}
 
        glDepthMask( GL_FALSE );
        glEnable(GL_BLEND);
@@ -599,9 +600,7 @@ void SGLightning::lt_Render(void) {
                if( lt_tree[n].depth >= 2 ) {
             glLineWidth(3);
                        sgScaleVec4(c, col, t1 * 0.6f);
-                       glDisable(GL_LINE_SMOOTH);
                        DRAW_SEG();
-                       glEnable(GL_LINE_SMOOTH);
                } else {
                        if( lt_tree[n].depth == 0 ) {
                 glLineWidth(12);
@@ -610,15 +609,11 @@ void SGLightning::lt_Render(void) {
 
                 glLineWidth(6);
                                sgScaleVec4(c, col, t1);
-                               glDisable(GL_LINE_SMOOTH);
                                DRAW_SEG();
-                               glEnable(GL_LINE_SMOOTH);
                        } else {
                 glLineWidth(6);
                                sgScaleVec4(c, col, t1 * 0.7f);
-                               glDisable(GL_LINE_SMOOTH);
                                DRAW_SEG();
-                               glEnable(GL_LINE_SMOOTH);
                        }
 
             if( lt_tree[n].depth == 0 ) 
@@ -627,9 +622,7 @@ void SGLightning::lt_Render(void) {
                 glLineWidth(2);
 
             sgSetVec4(c, t1, t1, t1, t1);
-                       glDisable(GL_LINE_SMOOTH);
                        DRAW_SEG();
-                       glEnable(GL_LINE_SMOOTH);
                }
 
        }