Continue work on shadow rendering

shader/lighting/cap.geom

@@ -9,9 +9,9 @@ vec4 projNear (vec4 pos)
     // note we project to a specific height
     // this is quite brittle, not ideal
     vec3 dir = pos.xyz - lightPos ;
-    float a = (140 - pos.z) / dir.z ;
+    float a = (100 - pos.z) / dir.z ;
     vec2 xy = (pos.xyz + a * dir).xy ;
-    return vec4 ( xy, 140 , 1) ;
+    return vec4 ( xy, 100 , 1) ;
 }
 void main()
 {
@@ -28,8 +28,8 @@ void main()
         // the front cap
         vec4 v1 = vec4 (0,0,1,0) ;
         gl_Position = theMat * projNear(p0); EmitVertex();
-        gl_Position = theMat * projNear(p1); EmitVertex();
         gl_Position = theMat * projNear(p2); EmitVertex();
+        gl_Position = theMat * projNear(p1); EmitVertex();
         EndPrimitive();
     }
     else {}