change constant values so as to run on intel gpu

openglcanvas.cpp

@@ -778,9 +778,9 @@ void OpenGLCanvas::paintGL(){
     else if (visualization=="3D Sphere") vis_mode=2.f;
     else if (visualization=="Equi-Rectangular") vis_mode=3.f;
     else if (visualization=="Stereographic") vis_mode=4.f;
+    else if (visualization=="Orthographic") vis_mode=4.5f;
     else if (visualization=="Mercator") vis_mode=5.f;
     else if (visualization=="Zorin-Barr") vis_mode=6.f;
-    else if (visualization=="Orthographic") vis_mode=7.f;
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
     glOrtho(0.0, 2.0/extent, 0.0, 2.0/scale, 0.0, -2.0/vis_mode);

shaders/vertex_shader.vert

@@ -61,7 +61,7 @@ void main(void){
     phi = asin(y)/1.5708;
 
     // Visualize using specified visualization (remove for timings in the paper! Use only "Perspective" in the paper!)
-    if (vis_mode==1.0) { // Moebius
+    if (vis_mode==1.0) { // Moebius or Perspective
         u = x/(-z);
         v = y/(-z);
         gl_Position = vec4(u/extent,v/extent,z,1.0);
@@ -75,6 +75,11 @@ void main(void){
         v = 2.0*y/(-z+1.0);
         gl_Position = vec4(u/extent,v/extent,z,1.0);
     }
+    else if (vis_mode==4.5){ // Orthographic
+        u=x;
+        v=y;
+        gl_Position = vec4(u/extent,v/extent,z,1.0);
+    }
     else if (vis_mode==5.0) { // Mercator
         u = lambda;
         v = log((1.0/cos(phi)) + tan(phi));
@@ -92,12 +97,5 @@ void main(void){
         v=zbrho*sin(zbalpha);
         gl_Position = vec4(u/extent,v/extent,z,1.0);
     }
-    else if (vis_mode==7.0){ // Orthographic
-        u=x;
-        v=y;
-        gl_Position = vec4(u/extent,v/extent,z,1.0);
-    }
-
-//    gl_Position = vec4(u/2.0,v/2.0,z,1.0);
 
 }