X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=tools%2Fviewer.cpp;fp=tools%2Fviewer.cpp;h=bc024e1f642eab1fb1814895aeb0cf3ee6654f7a;hp=0000000000000000000000000000000000000000;hb=c6a6dd3d7dced09e84d6e51bb5db32aa7c6f2c56;hpb=a5bf02196c301faea88d54933d0586da0aadb614

diff --git a/tools/viewer.cpp b/tools/viewer.cpp
new file mode 100644
index 00000000..bc024e1f
--- /dev/null
+++ b/tools/viewer.cpp
@@ -0,0 +1,208 @@
+#include <cmath>
+#include <msp/core/application.h>
+#include <msp/core/getopt.h>
+#include <msp/fs/utils.h>
+#include <msp/graphics/simplewindow.h>
+#include <msp/gl/blend.h>
+#include <msp/gl/camera.h>
+#include <msp/gl/framebuffer.h>
+#include <msp/gl/light.h>
+#include <msp/gl/lighting.h>
+#include <msp/gl/mesh.h>
+#include <msp/gl/object.h>
+#include <msp/gl/tests.h>
+#include <msp/input/mouse.h>
+#include <msp/io/print.h>
+
+using namespace std;
+using namespace Msp;
+
+class Viewer: public RegisteredApplication<Viewer>
+{
+private:
+	Graphics::SimpleGLWindow window;
+	Input::Mouse mouse;
+	GL::Object *object;
+	GL::Mesh *mesh;
+	GL::Light light;
+	GL::Lighting lighting;
+	GL::Camera camera;
+	float yaw;
+	float pitch;
+	float distance;
+	float light_yaw;
+	float light_pitch;
+	unsigned dragging;
+
+public:
+	Viewer(int, char **);
+	~Viewer();
+
+	virtual int main();
+private:
+	virtual void tick();
+
+	void button_press(unsigned);
+	void button_release(unsigned);
+	void axis_motion(unsigned, float, float);
+
+	void update_camera();
+	void update_light();
+};
+
+
+Viewer::Viewer(int argc, char **argv):
+	window(1024, 768, false),
+	mouse(window),
+	object(0),
+	mesh(0),
+	yaw(0),
+	pitch(0),
+	distance(10),
+	light_yaw(0),
+	light_pitch(0),
+	dragging(0)
+{
+	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")
+	{
+		object = new GL::Object;
+		DataFile::load(*object, fn);
+	}
+	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));
+	mouse.signal_button_release.connect(sigc::mem_fun(this, &Viewer::button_release));
+	mouse.signal_axis_motion.connect(sigc::mem_fun(this, &Viewer::axis_motion));
+
+	light.set_position(GL::Vector4(0, 0, 1, 0));
+	lighting.attach(0, light);
+
+	camera.set_up_direction(GL::Vector3(0, 0, 1));
+	update_camera();
+}
+
+Viewer::~Viewer()
+{
+	delete object;
+	delete mesh;
+}
+
+int Viewer::main()
+{
+	window.show();
+	return Application::main();
+}
+
+void Viewer::tick()
+{
+	window.tick();
+
+	GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
+
+	camera.apply();
+
+	GL::Bind bind_lighting(lighting);
+	GL::Bind bind_depth(GL::DepthTest::lequal());
+	GL::Bind bind_blend(GL::Blend::alpha());
+	if(object)
+		object->render();
+	else if(mesh)
+		mesh->draw();
+
+	window.swap_buffers();
+}
+
+void Viewer::button_press(unsigned btn)
+{
+	if(btn==1)
+	{
+		dragging = 1;
+	}
+	else if(btn==3)
+	{
+		dragging = 3;
+		axis_motion(0, 0, 0);
+	}
+	else if(btn==4)
+	{
+		distance *= 0.9;
+		update_camera();
+	}
+	else if(btn==5)
+	{
+		distance *= 1.1;
+		update_camera();
+	}
+}
+
+void Viewer::button_release(unsigned btn)
+{
+	if(btn==dragging)
+		dragging = 0;
+}
+
+void Viewer::axis_motion(unsigned axis, float, float delta)
+{
+	if(dragging==1)
+	{
+		float dx = (axis==0 ? delta : 0);
+		float dy = (axis==1 ? delta : 0);
+
+		yaw -= dx*M_PI*2;
+		while(yaw>M_PI)
+			yaw -= M_PI*2;
+		while(yaw<-M_PI)
+			yaw += M_PI*2;
+
+		pitch += dy*M_PI;
+		if(pitch>M_PI*0.49)
+			pitch = M_PI*0.49;
+		if(pitch<-M_PI*0.49)
+			pitch = -M_PI*0.49;
+
+		update_camera();
+	}
+	else if(dragging==3)
+	{
+		float x = mouse.get_axis_value(0);
+		float y = mouse.get_axis_value(1);
+
+		light_yaw = yaw+x*M_PI;
+		light_pitch = pitch-y*M_PI;
+
+		update_light();
+	}
+}
+
+void Viewer::update_camera()
+{
+	float cy = cos(yaw);
+	float sy = sin(yaw);
+	float cp = cos(pitch);
+	float sp = sin(pitch);
+	camera.set_position(GL::Vector3(-cy*cp*distance, -sy*cp*distance, -sp*distance));
+	camera.set_depth_clip(distance*0.02, distance*50);
+	camera.look_at(GL::Vector3(0, 0, 0));
+}
+
+void Viewer::update_light()
+{
+	float cy = cos(light_yaw);
+	float sy = sin(light_yaw);
+	float cp = cos(light_pitch);
+	float sp = sin(light_pitch);
+	light.set_position(GL::Vector4(-cy*cp, -sy*cp, -sp, 0));
+}