getting ready to have the camera poses plotted using spheres. auto-copy pthreadVC3d.dll and poses.csv to output directory

src/main.cpp

@@ -31,9 +31,10 @@ void process_input() {
 }
 
 static uint shader;
-void create_new_sphere(body* b) {
+void create_new_sphere(body* b, float scale=1) {
     assert(load_body(b, "Icosphere.obj"));
     b->shader = shader;
+    b->scale = scale;
     b->pose = glm::translate(b->pose, glm::vec3(0, 0, 0));
 }
 
@@ -96,6 +97,7 @@ static void cursor_position_callback(GLFWwindow* window, double xpos, double ypo
     float dy = (ypos - prev_cursor_y);
 
     glm::mat4 camera_to_world = glm::inverse(world_to_camera);
+    // These could be acquired via some cross products. Don't know if that's more efficient.
     glm::vec4 strafe_x = camera_to_world[0];
     glm::vec4 strafe_y = camera_to_world[1];
     prev_cursor_x = xpos;