From de1e1703104cc7501f6826ada98e1dc11c60eb74 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 5 Aug 2012 15:53:41 +0300
Subject: [PATCH] Add support for viewing animations

---
 tools/viewer.cpp | 73 ++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 59 insertions(+), 14 deletions(-)

diff --git a/tools/viewer.cpp b/tools/viewer.cpp
index bc024e1f..db2b99e1 100644
--- a/tools/viewer.cpp
+++ b/tools/viewer.cpp
@@ -3,6 +3,9 @@
 #include <msp/core/getopt.h>
 #include <msp/fs/utils.h>
 #include <msp/graphics/simplewindow.h>
+#include <msp/gl/animatedobject.h>
+#include <msp/gl/animation.h>
+#include <msp/gl/animationplayer.h>
 #include <msp/gl/blend.h>
 #include <msp/gl/camera.h>
 #include <msp/gl/framebuffer.h>
@@ -13,6 +16,8 @@
 #include <msp/gl/tests.h>
 #include <msp/input/mouse.h>
 #include <msp/io/print.h>
+#include <msp/time/timestamp.h>
+#include <msp/time/utils.h>
 
 using namespace std;
 using namespace Msp;
@@ -24,6 +29,9 @@ private:
 	Input::Mouse mouse;
 	GL::Object *object;
 	GL::Mesh *mesh;
+	GL::Animation *animation;
+	GL::AnimatedObject *anim_object;
+	GL::AnimationPlayer *anim_player;
 	GL::Light light;
 	GL::Lighting lighting;
 	GL::Camera camera;
@@ -33,6 +41,7 @@ private:
 	float light_yaw;
 	float light_pitch;
 	unsigned dragging;
+	Time::TimeStamp last_tick;
 
 public:
 	Viewer(int, char **);
@@ -56,6 +65,9 @@ Viewer::Viewer(int argc, char **argv):
 	mouse(window),
 	object(0),
 	mesh(0),
+	animation(0),
+	anim_object(0),
+	anim_player(0),
 	yaw(0),
 	pitch(0),
 	distance(10),
@@ -66,21 +78,41 @@ Viewer::Viewer(int argc, char **argv):
 	if(argc<2)
 		throw usage_error("Filename must be provided");
 
-	string fn = argv[1];
-	string ext = FS::extpart(fn);
-
-	if(ext==".mesh")
-	{
-		mesh = new GL::Mesh;
-		DataFile::load(*mesh, fn);
-	}
-	else if(ext==".object")
+	for(int i=1; i<argc; ++i)
 	{
-		object = new GL::Object;
-		DataFile::load(*object, fn);
+		string fn = argv[i];
+		string ext = FS::extpart(fn);
+
+		if(ext==".mesh")
+		{
+			if(mesh || object)
+				throw usage_error("Only one mesh or object may be specified");
+
+			mesh = new GL::Mesh;
+			DataFile::load(*mesh, fn);
+		}
+		else if(ext==".object")
+		{
+			if(mesh || object)
+				throw usage_error("Only one mesh or object may be specified");
+
+			object = new GL::Object;
+			DataFile::load(*object, fn);
+		}
+		else if(ext==".anim")
+		{
+			if(!object)
+				throw usage_error("An object must be provided for animation");
+
+			animation = new GL::Animation;
+			DataFile::load(*animation, argv[2]);
+			anim_object = new GL::AnimatedObject(*object);
+			anim_player = new GL::AnimationPlayer;
+			anim_player->play(*anim_object, *animation);
+		}
+		else
+			throw usage_error("Don't know how to view this file");
 	}
-	else
-		throw usage_error("Don't know how to view this file");
 
 	window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Viewer::exit), 0));
 	mouse.signal_button_press.connect(sigc::mem_fun(this, &Viewer::button_press));
@@ -108,6 +140,17 @@ int Viewer::main()
 
 void Viewer::tick()
 {
+	if(anim_player)
+	{
+		Time::TimeStamp t = Time::now();
+		Time::TimeDelta dt;
+		if(last_tick)
+			dt = t-last_tick;
+		last_tick = t;
+
+		anim_player->tick(dt);
+	}
+
 	window.tick();
 
 	GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
@@ -117,7 +160,9 @@ void Viewer::tick()
 	GL::Bind bind_lighting(lighting);
 	GL::Bind bind_depth(GL::DepthTest::lequal());
 	GL::Bind bind_blend(GL::Blend::alpha());
-	if(object)
+	if(anim_object)
+		anim_object->render();
+	else if(object)
 		object->render();
 	else if(mesh)
 		mesh->draw();
-- 
2.45.2