Improve numerical stability of projection

lib/contour-vertex.glsl

@@ -5,5 +5,5 @@ attribute vec3 position;
 uniform mat4 model, view, projection;
 
 void main() {
-  gl_Position = projection * view * model * vec4(position, 1.0);
+  gl_Position = projection * (view * (model * vec4(position, 1.0)));
 }

lib/edge-vertex.glsl

@@ -11,7 +11,7 @@ varying vec3 f_data;
 varying vec2 f_uv;
 
 void main() {
-  gl_Position = projection * view * model * vec4(position, 1.0);
+  gl_Position = projection * (view * (model * vec4(position, 1.0)));
   f_color = color;
   f_data  = position;
   f_uv    = uv;

lib/pick-point-vertex.glsl

@@ -17,7 +17,7 @@ void main() {
 
     gl_Position = vec4(0.0, 0.0, 0.0, 0.0);
   } else {
-    gl_Position  = projection * view * model * vec4(position, 1.0);
+    gl_Position  = projection * (view * (model * vec4(position, 1.0)));
     gl_PointSize = pointSize;
   }
   f_id         = id;

lib/pick-vertex.glsl

@@ -9,7 +9,7 @@ varying vec3 f_position;
 varying vec4 f_id;
 
 void main() {
-  gl_Position = projection * view * model * vec4(position, 1.0);
+  gl_Position = projection * (view * (model * vec4(position, 1.0)));
   f_id        = id;
   f_position  = position;
 }

lib/point-vertex.glsl

@@ -18,7 +18,7 @@ void main() {
 
     gl_Position = vec4(0.0, 0.0 ,0.0 ,0.0);
   } else {
-    gl_Position = projection * view * model * vec4(position, 1.0);
+    gl_Position = projection * (view * (model * vec4(position, 1.0)));
   }
   gl_PointSize = pointSize;
   f_color = color;

lib/triangle-vertex.glsl

@@ -19,7 +19,7 @@ varying vec4 f_color;
 varying vec2 f_uv;
 
 vec4 project(vec3 p) {
-  return projection * view * model * vec4(p, 1.0);
+  return projection * (view * (model * vec4(p, 1.0)));
 }
 
 void main() {