X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Fapp.cc;h=96e92f332ae7231d8e377801bfab2cc4dd106397;hp=6125823c37583d51f76a1dcfc616e3694d231077;hb=197bafc7f54795243d4c217c2efcf41f01d4100d;hpb=84484521a697fe60f63bff077b9ba7475a45e54e

diff --git a/src/app.cc b/src/app.cc
index 6125823..96e92f3 100644
--- a/src/app.cc
+++ b/src/app.cc
@@ -1,3 +1,911 @@
+#include <stdio.h>
+#include <limits.h>
+#include <assert.h>
+#include <goatvr.h>
 #include "app.h"
+#include "opengl.h"
+#include "sdr.h"
+#include "texture.h"
+#include "mesh.h"
+#include "meshgen.h"
+#include "scene.h"
+#include "metascene.h"
+#include "datamap.h"
+#include "ui.h"
+#include "opt.h"
+#include "post.h"
+#include "renderer.h"
+#include "avatar.h"
+#include "vrinput.h"
+#include "exman.h"
+#include "blob_exhibit.h"
+#include "dbg_gui.h"
+#include "geomdraw.h"
+#include "ui_exhibit.h"
 
+#define NEAR_CLIP	5.0
+#define FAR_CLIP	10000.0
+
+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;
+int vp_width, vp_height;
+float win_aspect;
+bool fb_srgb;
 bool opt_gear_wireframe;
+
+TextureSet texman;
+SceneSet sceneman;
+
+int fpexcept_enabled;
+
+unsigned int dbg_key_pending;
+
+static Avatar avatar;
+
+static float cam_dist = 0.0;
+static float floor_y;	// last floor height
+static float user_eye_height = 165;
+
+static float walk_speed = 300.0f;
+static float mouse_speed = 0.5f;
+static bool show_walk_mesh, noclip = false;
+
+static bool have_headtracking, have_handtracking, should_swap;
+
+static int prev_mx, prev_my;
+static bool bnstate[8];
+static bool keystate[256];
+static bool gpad_bnstate[64];
+static Vec2 joy_move, joy_look;
+static float joy_deadzone = 0.01;
+
+static float framerate;
+
+static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
+static MetaScene *mscn;
+static unsigned int sdr_post_gamma;
+
+static long prev_msec;
+
+static ExhibitManager *exman;
+static bool show_blobs;
+
+ExSelection exsel_active, exsel_hover;
+ExSelection exsel_grab_left, exsel_grab_right;
+#define exsel_grab_mouse exsel_grab_right
+static ExhibitSlot exslot_left, exslot_right;
+#define exslot_mouse exslot_right
+
+static Renderer *rend;
+
+static Ray last_pick_ray;
+
+static bool post_scene_init_pending = true;
+
+
+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;
+	}
+	app_resize(opt.width, opt.height);
+	app_fullscreen(opt.fullscreen);
+
+	if(opt.vr) {
+		if(goatvr_init() == -1) {
+			return false;
+		}
+		goatvr_set_origin_mode(GOATVR_HEAD);
+		goatvr_set_units_scale(100.0f);
+
+		goatvr_startvr();
+		should_swap = goatvr_should_swap() != 0;
+		user_eye_height = goatvr_get_eye_height();
+		have_headtracking = goatvr_have_headtracking();
+		have_handtracking = goatvr_have_handtracking();
+
+		goatvr_recenter();
+	}
+
+	if(fb_srgb) {
+		int srgb_capable;
+		glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
+		printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
+		if(srgb_capable) {
+			glEnable(GL_FRAMEBUFFER_SRGB);
+		} else {
+			fb_srgb = 0;
+		}
+	}
+
+	glEnable(GL_MULTISAMPLE);
+	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_CULL_FACE);
+	glEnable(GL_NORMALIZE);
+
+	if(!init_debug_gui()) {
+		return false;
+	}
+
+	Mesh::use_custom_sdr_attr = false;
+
+	float ambient[] = {0.0, 0.0, 0.0, 0.0};
+	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
+
+	init_audio();
+
+	if(!init_vrhands()) {
+		return false;
+	}
+
+	mscn = new MetaScene;
+	if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
+		return false;
+	}
+
+	avatar.pos = mscn->start_pos;
+	Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
+	dir.y = 0;
+	avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
+
+	exman = new ExhibitManager;
+	// exhibits are loaded in post_scene_init, because they need access to the scene graph
+
+	if(!exui_init()) {
+		error_log("failed to initialize exhibit ui system\n");
+		return false;
+	}
+	exui_setnode(&exslot_left.node);
+
+	if(!fb_srgb) {
+		sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
+	}
+
+	rend = new Renderer;
+	if(!rend->init()) {
+		return false;
+	}
+	if(opt.reflect) {
+		rend->ropt |= RENDER_MIRRORS;
+	} else {
+		rend->ropt &= ~RENDER_MIRRORS;
+	}
+	rend->set_scene(mscn);
+
+	glUseProgram(0);
+
+	if(opt.vr || opt.fullscreen) {
+		app_grab_mouse(true);
+	}
+
+	if(mscn->music && opt.music) {
+		mscn->music->play(AUDIO_PLAYMODE_LOOP);
+	}
+	return true;
+}
+
+// post_scene_init is called after the scene has completed loading
+static void post_scene_init()
+{
+	mscn->update(0);	// update once to calculate node matrices
+
+	int num_mir = mscn->calc_mirror_planes();
+	info_log("found %d mirror planes\n", num_mir);
+
+	exman->load(mscn, "data/exhibits");
+}
+
+void app_cleanup()
+{
+	if(mscn->music) {
+		mscn->music->stop();
+	}
+	destroy_audio();
+
+	app_grab_mouse(false);
+	if(opt.vr) {
+		goatvr_shutdown();
+	}
+	destroy_vrhands();
+
+	delete rend;
+
+	exui_shutdown();
+
+	/* this must be destroyed before the scene graph to detach exhibit nodes
+	 * before the scene tries to delete them recursively
+	 */
+	delete exman;
+
+	texman.clear();
+	sceneman.clear();
+
+	cleanup_debug_gui();
+}
+
+static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
+{
+	Mesh *wm = mscn->walk_mesh;
+	if(!wm) {
+		*newv = v;
+		return true;
+	}
+
+	Ray downray = Ray(v, Vec3(0, -1, 0));
+	HitPoint hit;
+	if(mscn->walk_mesh->intersect(downray, &hit)) {
+		*newv = hit.pos;
+		newv->y += user_eye_height;
+		return true;
+	}
+	return false;
+}
+
+static void update(float dt)
+{
+	texman.update();
+	sceneman.update();
+
+	if(post_scene_init_pending && !sceneman.pending()) {
+		post_scene_init_pending = false;
+		post_scene_init();
+	}
+
+	mscn->update(dt);
+	exman->update(dt);
+	exui_update(dt);
+
+	float speed = walk_speed * dt;
+	Vec3 dir;
+
+	// joystick
+	float jdeadsq = joy_deadzone * joy_deadzone;
+	float jmove_lensq = length_sq(joy_move);
+	float jlook_lensq = length_sq(joy_look);
+
+	if(jmove_lensq > jdeadsq) {
+		float len = sqrt(jmove_lensq);
+		jmove_lensq -= jdeadsq;
+
+		float mag = len * len;
+		dir.x += mag * joy_move.x / len * 2.0 * speed;
+		dir.z += mag * joy_move.y / len * 2.0 * speed;
+	}
+	if(jlook_lensq > jdeadsq) {
+		float len = sqrt(jlook_lensq);
+		jlook_lensq -= jdeadsq;
+
+		float mag = len * len;
+		avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
+		avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
+		if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
+		if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
+	}
+
+	// keyboard move
+	if(keystate[(int)'w']) {
+		dir.z -= speed;
+	}
+	if(keystate[(int)'s']) {
+		dir.z += speed;
+	}
+	if(keystate[(int)'d']) {
+		dir.x += speed;
+	}
+	if(keystate[(int)'a']) {
+		dir.x -= speed;
+	}
+	if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
+		avatar.pos.y += speed;
+	}
+	if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
+		avatar.pos.y -= speed;
+	}
+
+	float theta = M_PI * avatar.body_rot / 180.0f;
+	Vec3 newpos;
+	newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
+	newpos.y = avatar.pos.y;
+	newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
+
+	if(noclip) {
+		avatar.pos = newpos;
+	} else {
+		if(!constrain_walk_mesh(newpos, &avatar.pos)) {
+			float dtheta = M_PI / 32.0;
+			float theta = dtheta;
+			Vec2 dir2d = newpos.xz() - avatar.pos.xz();
+
+			for(int i=0; i<16; i++) {
+				Vec2 dvec = rotate(dir2d, theta);
+				Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
+				if(constrain_walk_mesh(pos, &avatar.pos)) {
+					break;
+				}
+				dvec = rotate(dir2d, -theta);
+				pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
+				if(constrain_walk_mesh(pos, &avatar.pos)) {
+					break;
+				}
+				theta += dtheta;
+			}
+		}
+		floor_y = avatar.pos.y - user_eye_height;
+	}
+
+	// TODO move to the avatar system
+	// calculate mouselook view matrix
+	mouse_view_matrix = Mat4::identity;
+	mouse_view_matrix.pre_translate(0, 0, -cam_dist);
+	if(!have_headtracking) {
+		mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
+	}
+	mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
+	mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
+
+
+	// update hand-tracking
+	if(have_handtracking) {
+		update_vrhands(&avatar);
+
+		if(vrhand[0].valid) {
+			exslot_left.node.set_position(vrhand[0].pos);
+			exslot_left.node.set_rotation(vrhand[0].rot);
+
+			// right hand takes precedence for hover
+			if(!exsel_grab_left && !exsel_hover) {
+				exsel_hover = exman->select(Sphere(vrhand[0].pos, 5));
+			}
+		}
+		if(vrhand[1].valid) {
+			exslot_right.node.set_position(vrhand[1].pos);
+			exslot_right.node.set_rotation(vrhand[1].rot);
+
+			if(!exsel_grab_right) {
+				exsel_hover = exman->select(Sphere(vrhand[1].pos, 5));
+			}
+		}
+
+	} else {
+		// check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
+		if(!exsel_grab_mouse) {
+			Ray ray = calc_pick_ray(prev_mx, prev_my);
+			exsel_hover = exman->select(ray);
+		}
+
+		// TODO do this properly
+		// set the position of the left hand at a suitable position for the exhibit UI
+		dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
+		exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
+	}
+
+	if(!exslot_right.empty()) exslot_right.node.update(dt);
+	// always update the left slot, because it's the anchor point of the exhibit ui
+	exslot_left.node.update(dt);
+}
+
+void app_display()
+{
+	float dt = (float)(time_msec - prev_msec) / 1000.0f;
+	prev_msec = time_msec;
+
+	if(debug_gui) {
+		ImGui::GetIOPtr()->DeltaTime = dt;
+		ImGui::NewFrame();
+
+		//ImGui::ShowTestWindow();
+	}
+
+	glClearColor(1, 1, 1, 1);
+
+	if(opt.vr) {
+		// VR mode
+		goatvr_draw_start();
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+		update(dt);
+
+		for(int i=0; i<2; i++) {
+			// for each eye
+			goatvr_draw_eye(i);
+			if(goatvr_get_fb_texture()) {
+				vp_width = goatvr_get_fb_eye_width(i);
+				vp_height = goatvr_get_fb_eye_height(i);
+			} else {
+				vp_width = win_width / 2;
+			}
+
+			proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
+			glMatrixMode(GL_PROJECTION);
+			glLoadMatrixf(proj_matrix[0]);
+
+			view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
+			glMatrixMode(GL_MODELVIEW);
+			glLoadMatrixf(view_matrix[0]);
+
+			draw_scene();
+			if(have_handtracking) {
+				draw_vrhands();
+			}
+
+			if(debug_gui) {
+				ImGui::Render();
+			}
+		}
+		goatvr_draw_done();
+
+		vp_width = win_width;
+		vp_height = win_height;
+
+		if(should_swap) {
+			app_swap_buffers();
+		}
+
+	} else {
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+		update(dt);
+
+		proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
+		glMatrixMode(GL_PROJECTION);
+		glLoadMatrixf(proj_matrix[0]);
+
+		view_matrix = mouse_view_matrix;
+		glMatrixMode(GL_MODELVIEW);
+		glLoadMatrixf(view_matrix[0]);
+
+		draw_scene();
+
+		if(!fb_srgb && sdr_post_gamma) {
+			slow_post(sdr_post_gamma);
+			glUseProgram(0);
+		}
+
+		if(debug_gui) {
+			ImGui::Render();
+		}
+		app_swap_buffers();
+	}
+	assert(glGetError() == GL_NO_ERROR);
+
+	calc_framerate();
+}
+
+
+static void draw_scene()
+{
+	rend->draw();
+	exman->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(vrhand[i].valid) {
+				glColor3f(i, 1 - i, i);
+			} else {
+				glColor3f(0.5, 0.5, 0.5);
+			}
+			Vec3 v = head_xform * vrhand[i].pos;
+			Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), vrhand[i].rot) * 20.0f;
+			Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), vrhand[i].rot) * 10.0f;
+			Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), vrhand[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(debug_gui && dbg_sel_node) {
+		AABox bvol = dbg_sel_node->get_bounds();
+		draw_geom_object(&bvol);
+	}
+
+	if(show_walk_mesh && mscn->walk_mesh) {
+		glPushAttrib(GL_ENABLE_BIT);
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_ONE, GL_ONE);
+		glEnable(GL_POLYGON_OFFSET_FILL);
+
+		glUseProgram(0);
+
+		glPolygonOffset(-1, 1);
+		glDepthMask(0);
+
+		glColor3f(0.3, 0.08, 0.01);
+		mscn->walk_mesh->draw();
+
+		glDepthMask(1);
+
+		glPopAttrib();
+	}
+
+	exui_draw();
+
+	print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
+	draw_ui();
+}
+
+
+void app_reshape(int x, int y)
+{
+	glViewport(0, 0, x, y);
+	goatvr_set_fb_size(x, y, 1.0f);
+	debug_gui_reshape(x, y);
+
+	vp_width = x;
+	vp_height = y;
+}
+
+void app_keyboard(int key, bool pressed)
+{
+	unsigned int mod = app_get_modifiers();
+
+	if(debug_gui && !(pressed && (key == '`' || key == 27))) {
+		debug_gui_key(key, pressed, mod);
+		return;	// ignore all keystrokes when GUI is visible
+	}
+
+	if(pressed) {
+		switch(key) {
+		case 27:
+			app_quit();
+			break;
+
+		case '\n':
+		case '\r':
+			if(mod & MOD_ALT) {
+				app_toggle_fullscreen();
+			}
+			break;
+
+		case '`':
+			debug_gui = !debug_gui;
+			show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
+			break;
+
+		case 'm':
+			app_toggle_grab_mouse();
+			show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
+			break;
+
+		case 'w':
+			if(mod & MOD_CTRL) {
+				show_walk_mesh = !show_walk_mesh;
+				show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
+			}
+			break;
+
+		case 'c':
+			if(mod & MOD_CTRL) {
+				noclip = !noclip;
+				show_message(noclip ? "no clip" : "clip");
+			}
+			break;
+
+		case 'f':
+			toggle_flight();
+			break;
+
+		case 'p':
+			if(mod & MOD_CTRL) {
+				fb_srgb = !fb_srgb;
+				show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
+			}
+			break;
+
+		case '=':
+			walk_speed *= 1.25;
+			show_message("walk speed: %g", walk_speed);
+			break;
+
+		case '-':
+			walk_speed *= 0.75;
+			show_message("walk speed: %g", walk_speed);
+			break;
+
+		case ']':
+			mouse_speed *= 1.2;
+			show_message("mouse speed: %g", mouse_speed);
+			break;
+
+		case '[':
+			mouse_speed *= 0.8;
+			show_message("mouse speed: %g", mouse_speed);
+			break;
+
+		case 'b':
+			show_blobs = !show_blobs;
+			show_message("blobs: %s\n", show_blobs ? "on" : "off");
+			break;
+
+		case ' ':
+			goatvr_recenter();
+			show_message("VR recenter\n");
+			break;
+
+		case KEY_UP:
+			exui_scroll(-1);
+			break;
+
+		case KEY_DOWN:
+			exui_scroll(1);
+			break;
+
+		case KEY_LEFT:
+			exui_change_tab(-1);
+			break;
+
+		case KEY_RIGHT:
+			exui_change_tab(1);
+			break;
+
+		case KEY_F5:
+		case KEY_F6:
+		case KEY_F7:
+		case KEY_F8:
+			dbg_key_pending |= 1 << (key - KEY_F5);
+			break;
+		}
+	}
+
+	if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
+		keystate[key] = pressed;
+	}
+}
+
+void app_mouse_button(int bn, bool pressed, int x, int y)
+{
+	static int press_x, press_y;
+
+	if(debug_gui) {
+		debug_gui_mbutton(bn, pressed, x, y);
+		return;	// ignore mouse events while GUI is visible
+	}
+
+	prev_mx = x;
+	prev_my = y;
+	bnstate[bn] = pressed;
+
+	if(bn == 0) {
+		ExSelection sel;
+		Ray ray = calc_pick_ray(x, y);
+		sel = exman->select(ray);
+
+		if(pressed) {
+			if(sel && (app_get_modifiers() & MOD_CTRL)) {
+				exsel_grab_mouse = sel;
+				Vec3 pos = sel.ex->node->get_position();
+				debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
+				exslot_mouse.node.set_position(pos);
+				exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
+				exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
+				if(exsel_active) {
+					exsel_active = ExSelection::null;	// cancel active on grab
+				}
+			}
+			press_x = x;
+			press_y = y;
+
+		} else {
+			if(exsel_grab_mouse) {
+				// cancel grab on mouse release
+				Exhibit *ex = exsel_grab_mouse.ex;
+				Vec3 pos = exslot_mouse.node.get_position();
+
+				debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
+
+				exslot_mouse.detach_exhibit();
+
+				ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
+				if(!slot) {
+					debug_log("no empty slot nearby\n");
+					if(ex->prev_slot && ex->prev_slot->empty()) {
+						slot = ex->prev_slot;
+						debug_log("using previous slot");
+					}
+				}
+
+				if(slot) {
+					slot->attach_exhibit(ex);
+				} else {
+					// nowhere to put it, so stash it for later
+					exslot_mouse.detach_exhibit();
+					exman->stash_exhibit(ex);
+					debug_log("no slots available, stashing\n");
+				}
+
+				exsel_grab_mouse = ExSelection::null;
+			}
+
+			if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
+				exsel_active = sel;	// select or deselect active exhibit
+				if(sel) {
+					debug_log("selecting...\n");
+				} else {
+					debug_log("deselecting...\n");
+				}
+			}
+
+			press_x = press_y = INT_MIN;
+		}
+	}
+}
+
+static inline void mouse_look(float dx, float dy)
+{
+	float scrsz = (float)win_height;
+	avatar.body_rot += dx * 512.0 / scrsz;
+	avatar.head_alt += dy * 512.0 / scrsz;
+
+	if(avatar.head_alt < -90) avatar.head_alt = -90;
+	if(avatar.head_alt > 90) avatar.head_alt = 90;
+}
+
+static void mouse_zoom(float dx, float dy)
+{
+	cam_dist += dy * 0.1;
+	if(cam_dist < 0.0) cam_dist = 0.0;
+}
+
+void app_mouse_motion(int x, int y)
+{
+	if(debug_gui) {
+		debug_gui_mmotion(x, y);
+		return;	// ignore mouse events while GUI is visible
+	}
+
+	int dx = x - prev_mx;
+	int dy = y - prev_my;
+	prev_mx = x;
+	prev_my = y;
+
+	if(!dx && !dy) return;
+
+	if(exsel_grab_mouse) {
+		Vec3 pos = exslot_mouse.node.get_node_position();
+		Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
+
+		exslot_mouse.node.set_position(pos + dir);
+	}
+
+	if(bnstate[2]) {
+		mouse_look(dx, dy);
+	}
+}
+
+void app_mouse_delta(int dx, int dy)
+{
+	if(bnstate[2]) {
+		mouse_zoom(dx * mouse_speed, dy * mouse_speed);
+	} else {
+		mouse_look(dx * mouse_speed, dy * mouse_speed);
+	}
+}
+
+void app_mouse_wheel(int dir)
+{
+	if(debug_gui) {
+		debug_gui_wheel(dir);
+	}
+}
+
+void app_gamepad_axis(int axis, float val)
+{
+	switch(axis) {
+	case 0:
+		joy_move.x = val;
+		break;
+	case 1:
+		joy_move.y = val;
+		break;
+
+	case 2:
+		joy_look.x = val;
+		break;
+	case 3:
+		joy_look.y = val;
+		break;
+	}
+}
+
+void app_gamepad_button(int bn, bool pressed)
+{
+	gpad_bnstate[bn] = pressed;
+
+	if(pressed) {
+		switch(bn) {
+		case GPAD_LSTICK:
+			toggle_flight();
+			break;
+
+		case GPAD_X:
+			show_blobs = !show_blobs;
+			show_message("blobs: %s\n", show_blobs ? "on" : "off");
+			break;
+
+		case GPAD_START:
+			goatvr_recenter();
+			show_message("VR recenter\n");
+			break;
+
+		default:
+			break;
+		}
+	}
+}
+
+static void toggle_flight()
+{
+	static float prev_walk_speed = -1.0;
+	if(prev_walk_speed < 0.0) {
+		noclip = true;
+		prev_walk_speed = walk_speed;
+		walk_speed = 1000.0;
+		show_message("fly mode\n");
+	} else {
+		noclip = false;
+		walk_speed = prev_walk_speed;
+		prev_walk_speed = -1.0;
+		show_message("walk mode\n");
+	}
+}
+
+static void calc_framerate()
+{
+	//static int ncalc;
+	static int nframes;
+	static long prev_upd;
+
+	long elapsed = time_msec - prev_upd;
+	if(elapsed >= 1000) {
+		framerate = (float)nframes / (float)(elapsed * 0.001);
+		nframes = 1;
+		prev_upd = time_msec;
+
+		/*if(++ncalc >= 5) {
+			printf("fps: %f\n", framerate);
+			ncalc = 0;
+		}*/
+	} else {
+		++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;
+}