void Draw(double time, double fade)
{
// Shadow map
shadows_fbo.Bind(FramebufferTarget::Draw);
gl.Viewport(shadow_size, shadow_size);
gl.Clear().DepthBuffer();
auto light = CamMatrixf::Orbiting(
Vec3f(0, side*0.25, 0),
side*1.5,
Degrees(-time * 27),
Degrees(SineWave(time / 19.0)*25 + 45)
);
shadow_prog.fade.Set(fade);
shadow_prog.camera_matrix.Set(light);
shadow_prog.Use();
shadow_vao.Bind();
gl.Enable(Capability::PolygonOffsetFill);
cube.Draw(side*side);
gl.Disable(Capability::PolygonOffsetFill);
gl.Finish();
// On-screen
default_fb.Bind(Framebuffer::Target::Draw);
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
side*1.1,
Degrees(time * 19),
Degrees(SineWave(time / 20.0) * 39 + 50)
);
display_prog.fade.Set(fade);
display_prog.light_pos.Set(light.Position());
display_prog.camera_pos.Set(camera.Position());
display_prog.light_matrix.Set(light);
display_prog.camera_matrix.Set(camera);
display_prog.Use();
display_vao.Bind();
cube.Draw(side*side);
}
void window_loop(
const x11::Window& window,
AppData& app_data,
CommonData& common,
RaytracerTarget& rt_target,
std::size_t n_threads
)
{
Context gl;
Renderer renderer(app_data, rt_target.tex_unit);
renderer.Use(app_data);
Saver saver(app_data);
window.SelectInput(StructureNotifyMask| PointerMotionMask| KeyPressMask);
::XEvent event;
while(!common.Done())
{
if(app_data.verbosity > 0)
{
app_data.logstr()
<< "Rendering cube face "
<< common.Face()
<< std::endl;
}
// clear the raytrace target
rt_target.Clear(app_data);
renderer.InitFrame(app_data, common.Face());
renderer.Render(app_data);
common.context.SwapBuffers(window);
// setup logging period
std::chrono::system_clock::duration log_period;
if(app_data.verbosity > 4)
{
log_period = std::chrono::seconds(1);
}
else if(app_data.verbosity > 3)
{
log_period = std::chrono::seconds(5);
}
else if(app_data.verbosity > 2)
{
log_period = std::chrono::seconds(15);
}
else if(app_data.verbosity > 1)
{
log_period = std::chrono::minutes(1);
}
auto log_time = std::chrono::system_clock::now();
// signal all threads that they can start raytracing tiles
common.master_ready.Signal(n_threads);
while(!common.FaceDone())
{
unsigned slot = 0;
while(common.display.NextEvent(event))
{
switch(event.type)
{
case ClientMessage:
case DestroyNotify:
common.Stop();
break;
case ConfigureNotify:
app_data.render_width = event.xconfigure.width;
app_data.render_height = event.xconfigure.height;
break;
case MotionNotify:
break;
case KeyPress:
if(::XLookupKeysym(&event.xkey, 0) == XK_Escape)
common.Stop();
break;
default:;
}
}
if(common.Done()) break;
if((slot++ % 5) == 0)
{
auto lock = common.Lock();
renderer.Render(app_data);
gl.Finish();
lock.unlock();
common.context.SwapBuffers(window);
}
if(app_data.verbosity > 1)
{
auto now = std::chrono::system_clock::now();
if(log_time + log_period < now)
{
common.LogProgress(app_data);
log_time = now;
}
}
std::chrono::milliseconds period(5);
std::this_thread::sleep_for(period);
}
if(common.Done()) break;
// wait for all raytracer threads to finish
common.thread_ready.Wait(n_threads);
renderer.Render(app_data);
common.context.SwapBuffers(window);
if(app_data.verbosity > 1)
{
app_data.logstr()
<< "Finished cube face "
<< common.Face()
<< std::endl;
}
// save the face image
saver.SaveFrame(app_data, rt_target, common.Face());
// switch the face
common.NextFace(app_data);
// signal that the master is ready to render
// the next face
common.master_ready.Signal(n_threads);
}
}
void pbuffer_loop(
const glx::Pbuffer& pbuffer,
AppData& app_data,
CommonData& common,
RaytracerTarget& rt_target,
std::size_t n_threads
)
{
Context gl;
Renderer renderer(app_data, rt_target.tex_unit);
renderer.Use(app_data);
Saver saver(app_data);
while(!common.Done())
{
if(app_data.verbosity > 0)
{
app_data.logstr()
<< "Rendering cube face "
<< common.Face()
<< std::endl;
}
// clear the raytrace target
rt_target.Clear(app_data);
renderer.InitFrame(app_data, common.Face());
renderer.Render(app_data);
gl.Finish();
// signal all threads that they can start raytracing tiles
common.master_ready.Signal(n_threads);
if(common.Done()) break;
if(app_data.verbosity > 1)
{
// setup logging period
std::chrono::system_clock::duration log_period;
if(app_data.verbosity > 4)
{
log_period = std::chrono::seconds(1);
}
else if(app_data.verbosity > 3)
{
log_period = std::chrono::seconds(5);
}
else if(app_data.verbosity > 2)
{
log_period = std::chrono::seconds(10);
}
else if(app_data.verbosity > 1)
{
log_period = std::chrono::seconds(30);
}
auto log_time = std::chrono::system_clock::now();
while(!common.thread_ready.Signalled())
{
auto now = std::chrono::system_clock::now();
if(log_time + log_period < now)
{
common.LogProgress(app_data);
log_time = now;
}
std::chrono::milliseconds period(50);
std::this_thread::sleep_for(period);
}
}
// wait for all raytracer threads to finish
common.thread_ready.Wait(n_threads);
for(unsigned b=0; b!=2; ++b)
{
renderer.Render(app_data);
gl.Finish();
common.context.SwapBuffers(pbuffer);
}
// save the face image
saver.SaveFrame(app_data, rt_target, common.Face());
// switch the face
common.NextFace(app_data);
// signal that the master is ready to render
// the next face
common.master_ready.Signal(n_threads);
}
}
void thread_loop(AppData& app_data, CommonData& common, x11::Display& display, glx::Context& context)
{
Context gl;
ResourceAllocator alloc;
RaytraceCopier::Params rtc_params(
display,
context,
common.context
);
RaytraceCopier rt_copier(app_data, common.rt_target);
RaytracerResources rt_res(app_data, common.rt_data, alloc);
Raytracer raytracer(app_data, rt_res);
raytracer.Use(app_data);
std::vector<unsigned> backlog(app_data.cols());
std::chrono::milliseconds bl_interval(100);
while(!common.Done())
{
// all threads must wait until
// the raytrace target is cleared
common.master_ready.Wait();
if(common.Done()) break;
raytracer.InitFrame(app_data, common.Face());
auto bl_begin = std::chrono::steady_clock::now();
unsigned tile = 0;
while(common.NextFaceTile(tile))
{
raytracer.Raytrace(app_data, tile);
backlog.push_back(tile);
auto now = std::chrono::steady_clock::now();
if(bl_begin + bl_interval < now)
{
gl.Finish();
auto lock = common.Lock();
for(unsigned bl_tile : backlog)
{
rt_copier.Copy(
app_data,
rtc_params,
raytracer,
bl_tile
);
}
lock.unlock();
backlog.clear();
bl_begin = now;
}
else gl.Finish();
}
auto lock = common.Lock();
for(unsigned bl_tile : backlog)
{
rt_copier.Copy(
app_data,
rtc_params,
raytracer,
bl_tile
);
}
lock.unlock();
backlog.clear();
gl.Finish();
// signal to the master that the raytracing
// of the current face has finished
common.thread_ready.Signal();
if(common.Done()) break;
// wait for the master to save the face image
common.master_ready.Wait();
}
}
void RenderShadowMap(GLuint size)
{
// matrices
auto lt_proj= CamMatrixf::PerspectiveX(Degrees(12), 1.0, 85.0, 110.0);
auto light = CamMatrixf::LookingAt(light_position, Vec3f());
// setup the texture
Texture::Active(shadow_tex_unit);
mask_prog.Use();
Uniform<Mat4f>(mask_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(mask_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
draw_prog.Use();
Uniform<Mat4f>(draw_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(draw_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
Texture::Target tex_tgt = Texture::Target::_2D;
shadow_map.Bind(tex_tgt);
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::ClampToEdge);
Texture::WrapT(tex_tgt, TextureWrap::ClampToEdge);
Texture::CompareMode(tex_tgt, TextureCompareMode::CompareRefToTexture);
Texture::Image2D(
tex_tgt,
0,
PixelDataInternalFormat::DepthComponent32,
size, size,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
// create shadow program
ShadowProgram shadow_prog(vert_shader);
// VAO for the meshes in shadow program
VertexArray vao = meshes.VAOForProgram(shadow_prog);
vao.Bind();
// FBO for offscreen rendering of the shadow map
Framebuffer::Target fbo_tgt = Framebuffer::Target::Draw;
Framebuffer fbo;
fbo.Bind(fbo_tgt);
Framebuffer::AttachTexture(fbo_tgt, FramebufferAttachment::Depth, shadow_map, 0);
// RBO for offscreen rendering
Renderbuffer::Target rbo_tgt = Renderbuffer::Target::Renderbuffer;
Renderbuffer rbo;
rbo.Bind(rbo_tgt);
Renderbuffer::Storage(rbo_tgt, PixelDataInternalFormat::RGBA, size, size);
Framebuffer::AttachRenderbuffer(fbo_tgt, FramebufferAttachment::Color, rbo);
// setup the matrices
shadow_prog.projection_matrix.Set(lt_proj);
shadow_prog.camera_matrix.Set(light);
// setup and clear the viewport
gl.Viewport(size, size);
gl.Clear().DepthBuffer();
// draw the meshes
gl.PolygonOffset(1.0, 1.0);
gl.Enable(Capability::PolygonOffsetFill);
meshes.Draw();
gl.Disable(Capability::PolygonOffsetFill);
gl.Finish();
// bind the default framebuffer
DefaultFramebuffer().Bind(Framebuffer::Target::Draw);
}