Merge branch 'master' of goat:git/laserbrain_demo

diff --cc src/app.cc
index 2927ce8,24658ee..17ab2fd
--- 1/src/app.cc
--- 2/src/app.cc
+++ b/src/app.cc
@@@ -340,7 -348,6 +340,9 @@@ void app_display(
                        glLoadMatrixf(view_matrix[0]);
  
                        draw_scene();
-                       draw_vrhands();
++                      if(have_handtracking) {
++                              draw_vrhands();
++                      }
                }
                goatvr_draw_done();
  
@@@ -386,6 -395,36 +390,38 @@@ static void draw_scene(
                blobs->draw();
        }
  
++      /*
+       if(have_handtracking) {
+               Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
+               Mat4 head_dir_xform = head_xform.upper3x3();
+ 
+               glUseProgram(0);
+               glPushAttrib(GL_ENABLE_BIT);
+               glDisable(GL_LIGHTING);
+               glBegin(GL_LINES);
+               for(int i=0; i<2; i++) {
+                       if(hand[i].valid) {
+                               glColor3f(i, 1 - i, i);
+                       } else {
+                               glColor3f(0.5, 0.5, 0.5);
+                       }
+                       Vec3 v = head_xform * hand[i].pos;
+                       Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
+                       Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
+                       Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
+ 
+                       glVertex3f(v.x, v.y, v.z);
+                       glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
+                       glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
+                       glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
+                       glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
+                       glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
+               }
+               glEnd();
+               glPopAttrib();
+       }
++      */
+ 
        if(show_walk_mesh && mscn->walk_mesh) {
                glPushAttrib(GL_ENABLE_BIT);
                glEnable(GL_BLEND);

diff --cc src/avatar.h
index 0000000,0000000..6c3521e
new file mode 100644 (file)
--- /dev/null
--- /dev/null
+++ b/src/avatar.h
@@@ -1,0 -1,0 +1,24 @@@
++#ifndef AVATAR_H_
++#define AVATAR_H_
++
++#include <gmath/gmath.h>
++
++/* when head-tracking is available, head_tilt is ignored, and the
++ * body_rot (controlled by mouse/gamepad) is independent of head_rot.
++ *
++ * without head-tracking, head_rot is derived from body_rot and head_tilt
++ */
++class Avatar {
++public:
++      Vec3 pos;
++      float body_rot;
++      Quat head_rot;          // used when head-tracking
++      float head_tilt;        // used for mouselook
++
++      Avatar();
++      ~Avatar();
++
++      void draw() const;
++};
++
++#endif        // AVATAR_H_