pick ray calculation (moved to gph-math and used here)

[laserbrain_demo] / src / app.cc

diff --git a/src/app.cc b/src/app.cc
index a03fd34..25c59b3 100644 (file)
--- a/src/app.cc
+++ b/src/app.cc
@@ -26,6 +26,7 @@
 static void draw_scene();
 static void toggle_flight();
 static void calc_framerate();
+static Ray calc_pick_ray(int x, int y);
 
 long time_msec;
 int win_width, win_height;
@@ -38,6 +39,8 @@ SceneSet sceneman;
 
 unsigned int sdr_ltmap, sdr_ltmap_notex;
 
+int fpexcept_enabled;
+
 static Avatar avatar;
 
 static float cam_dist = 0.0;
@@ -69,13 +72,28 @@ static ExhibitManager *exman;
 static BlobExhibit *blobs;
 static bool show_blobs;
 
+static ExSelection ex_sel;
+
 static Renderer *rend;
 
-static bool show_debug_gui;
+static Ray last_pick_ray;
 
 
 bool app_init(int argc, char **argv)
 {
+       set_log_file("demo.log");
+
+       char *env = getenv("FPEXCEPT");
+       if(env && atoi(env)) {
+               info_log("enabling floating point exceptions\n");
+               fpexcept_enabled = 1;
+               enable_fpexcept();
+       }
+
+       if(init_opengl() == -1) {
+               return false;
+       }
+
        if(!init_options(argc, argv, "demo.conf")) {
                return false;
        }
@@ -112,7 +130,6 @@ bool app_init(int argc, char **argv)
        glEnable(GL_MULTISAMPLE);
        glEnable(GL_DEPTH_TEST);
        glEnable(GL_CULL_FACE);
-       glEnable(GL_LIGHTING);
        glEnable(GL_NORMALIZE);
 
        if(!init_debug_gui()) {
@@ -143,9 +160,11 @@ bool app_init(int argc, char **argv)
        avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 
        exman = new ExhibitManager;
+       /*
        if(!exman->load(mscn, "data/exhibits")) {
                //return false;
        }
+       */
 
        blobs = new BlobExhibit;
        blobs->node = new SceneNode;
@@ -330,24 +349,12 @@ static void update(float dt)
        }
 }
 
-static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
-{
-       unsigned int lt = GL_LIGHT0 + idx;
-       float posv[] = { pos.x, pos.y, pos.z, 1 };
-       float colv[] = { color.x, color.y, color.z, 1 };
-
-       glEnable(lt);
-       glLightfv(lt, GL_POSITION, posv);
-       glLightfv(lt, GL_DIFFUSE, colv);
-       glLightfv(lt, GL_SPECULAR, colv);
-}
-
 void app_display()
 {
        float dt = (float)(time_msec - prev_msec) / 1000.0f;
        prev_msec = time_msec;
 
-       if(show_debug_gui) {
+       if(debug_gui) {
                ImGui::GetIOPtr()->DeltaTime = dt;
                ImGui::NewFrame();
 
@@ -378,7 +385,7 @@ void app_display()
                                draw_vrhands();
                        }
 
-                       if(show_debug_gui) {
+                       if(debug_gui) {
                                ImGui::Render();
                        }
                }
@@ -408,7 +415,7 @@ void app_display()
                        glUseProgram(0);
                }
 
-               if(show_debug_gui) {
+               if(debug_gui) {
                        ImGui::Render();
                }
                app_swap_buffers();
@@ -421,16 +428,8 @@ void app_display()
 
 static void draw_scene()
 {
-       static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
-       set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
-       set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
-       set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
-
        rend->draw();
-
-       if(show_blobs) {
-               blobs->draw();
-       }
+       exman->draw();
 
        /*
        if(have_handtracking) {
@@ -468,7 +467,6 @@ static void draw_scene()
                glPushAttrib(GL_ENABLE_BIT);
                glEnable(GL_BLEND);
                glBlendFunc(GL_ONE, GL_ONE);
-               glDisable(GL_LIGHTING);
                glEnable(GL_POLYGON_OFFSET_FILL);
 
                glUseProgram(0);
@@ -500,7 +498,7 @@ void app_keyboard(int key, bool pressed)
 {
        unsigned int mod = app_get_modifiers();
 
-       if(show_debug_gui && !(pressed && (key == '`' || key == 27))) {
+       if(debug_gui && !(pressed && (key == '`' || key == 27))) {
                debug_gui_key(key, pressed, mod);
                return; // ignore all keystrokes when GUI is visible
        }
@@ -519,8 +517,8 @@ void app_keyboard(int key, bool pressed)
                        break;
 
                case '`':
-                       show_debug_gui = !show_debug_gui;
-                       show_message("debug gui %s", show_debug_gui ? "enabled" : "disabled");
+                       debug_gui = !debug_gui;
+                       show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
                        break;
 
                case 'm':
@@ -582,6 +580,10 @@ void app_keyboard(int key, bool pressed)
                        goatvr_recenter();
                        show_message("VR recenter\n");
                        break;
+
+               case 'x':
+                       exman->load(mscn, "data/exhibits");
+                       break;
                }
        }
 
@@ -592,7 +594,7 @@ void app_keyboard(int key, bool pressed)
 
 void app_mouse_button(int bn, bool pressed, int x, int y)
 {
-       if(show_debug_gui) {
+       if(debug_gui) {
                debug_gui_mbutton(bn, pressed, x, y);
                return; // ignore mouse events while GUI is visible
        }
@@ -600,6 +602,17 @@ void app_mouse_button(int bn, bool pressed, int x, int y)
        prev_mx = x;
        prev_my = y;
        bnstate[bn] = pressed;
+
+       if(bn == 0) {
+               if(!pressed) {
+                       if(ex_sel.ex) {
+                               ex_sel.ex = 0;
+                       } else {
+                               Ray ray = calc_pick_ray(x, y);
+                               ex_sel = exman->select(ray);
+                       }
+               }
+       }
 }
 
 static inline void mouse_look(float dx, float dy)
@@ -620,7 +633,7 @@ static void mouse_zoom(float dx, float dy)
 
 void app_mouse_motion(int x, int y)
 {
-       if(show_debug_gui) {
+       if(debug_gui) {
                debug_gui_mmotion(x, y);
                return; // ignore mouse events while GUI is visible
        }
@@ -632,11 +645,15 @@ void app_mouse_motion(int x, int y)
 
        if(!dx && !dy) return;
 
-       if(bnstate[0]) {
-               mouse_look(dx, dy);
+       if(ex_sel.ex) {
+               Vec3 pos = ex_sel.ex->node->get_node_position();
+               Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
+
+               ex_sel.ex->node->set_position(pos + dir);
        }
+
        if(bnstate[2]) {
-               mouse_zoom(dx, dy);
+               mouse_look(dx, dy);
        }
 }
 
@@ -651,7 +668,7 @@ void app_mouse_delta(int dx, int dy)
 
 void app_mouse_wheel(int dir)
 {
-       if(show_debug_gui) {
+       if(debug_gui) {
                debug_gui_wheel(dir);
        }
 }
@@ -719,7 +736,7 @@ static void toggle_flight()
 
 static void calc_framerate()
 {
-       static int ncalc;
+       //static int ncalc;
        static int nframes;
        static long prev_upd;
 
@@ -737,3 +754,12 @@ static void calc_framerate()
                ++nframes;
        }
 }
+
+static Ray calc_pick_ray(int x, int y)
+{
+       float nx = (float)x / (float)win_width;
+       float ny = (float)(win_height - y) / (float)win_height;
+
+       last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
+       return last_pick_ray;
+}