// The start of the Application
int App::start(const std::vector<std::string> &args)
{
clan::DisplayWindowDescription win_desc;
//win_desc.set_version(3, 2, false);
win_desc.set_allow_resize(true);
win_desc.set_title("Point Sprite Example");
win_desc.set_size(clan::Size( 800, 480 ), false);
clan::DisplayWindow window(win_desc);
clan::SlotContainer cc;
cc.connect(window.sig_window_close(), clan::bind_member(this, &App::on_window_close));
cc.connect(window.get_ic().get_keyboard().sig_key_up(), clan::bind_member(this, &App::on_input_up));
std::string theme;
if (clan::FileHelp::file_exists("../../../Resources/GUIThemeAero/theme.css"))
theme = "../../../Resources/GUIThemeAero";
else if (clan::FileHelp::file_exists("../../../Resources/GUIThemeBasic/theme.css"))
theme = "../../../Resources/GUIThemeBasic";
else
throw clan::Exception("No themes found");
clan::GUIWindowManagerTexture wm(window);
clan::GUIManager gui(wm, theme);
clan::Canvas canvas(window);
// Deleted automatically by the GUI
Options *options = new Options(gui, clan::Rect(0, 0, canvas.get_size()));
clan::Image image_grid(canvas, "../Blend/Resources/grid.png");
clan::Texture2D texture_particle(canvas, "Resources/particle.png");
float grid_width = (float) image_grid.get_width();
float grid_height = (float) image_grid.get_height();
grid_space = (float) (image_grid.get_width());
setup_particles();
clan::ShaderObject vertex_shader(canvas, clan::shadertype_vertex, text_shader_vertex);
if(!vertex_shader.compile())
{
throw clan::Exception(clan::string_format("Unable to compile vertex shader object: %1", vertex_shader.get_info_log()));
}
clan::ShaderObject fragment_shader(canvas, clan::shadertype_fragment, text_shader_fragment);
if(!fragment_shader.compile())
{
throw clan::Exception(clan::string_format("Unable to compile fragment shader object: %1", fragment_shader.get_info_log()));
}
clan::ProgramObject program_object(canvas);
program_object.attach(vertex_shader);
program_object.attach(fragment_shader);
program_object.bind_attribute_location(0, "InPosition");
program_object.bind_attribute_location(1, "InColor");
if (!program_object.link())
{
throw clan::Exception(clan::string_format("Unable to link program object: %1", program_object.get_info_log()));
}
program_object.set_uniform1i("Texture0", 0);
options->request_repaint();
clan::BlendStateDescription blend_state_desc;
blend_state_desc.enable_blending(true);
blend_state_desc.set_blend_function(clan::blend_src_alpha, clan::blend_one, clan::blend_src_alpha, clan::blend_one);
clan::BlendState blend_state(canvas, blend_state_desc);
clan::GameTime game_time;
while (!quit)
{
game_time.update();
wm.process();
wm.draw_windows(canvas);
int num_particles = options->num_particles;
if (num_particles > max_particles)
num_particles = max_particles;
move_particles(game_time.get_time_elapsed(), num_particles);
const float grid_xpos = 10.0f;
const float grid_ypos = 10.0f;
// Draw the grid
image_grid.draw(canvas, grid_xpos, grid_ypos);
if (num_particles > 0)
{
std::vector<clan::Vec2f> positions;
std::vector<clan::Colorf> colors;
positions.resize(num_particles);
colors.resize(num_particles);
for (int cnt=0; cnt<num_particles; cnt++)
{
positions[cnt] = clan::Vec2f(grid_xpos + particles[cnt].xpos, grid_ypos + particles[cnt].ypos);
switch (cnt % 3)
{
case 0:
colors[cnt] = clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f);
break;
case 1:
colors[cnt] = clan::Colorf(0.0f, 1.0f, 0.0f, 1.0f);
break;
case 2:
colors[cnt] = clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f);
break;
}
};
canvas.flush();
clan::GraphicContext gc = canvas.get_gc();
canvas.set_blend_state(blend_state);
clan::RasterizerStateDescription raster_state_desc;
raster_state_desc.set_point_size(options->point_size);
raster_state_desc.set_point_sprite_origin(clan::origin_upper_left);
clan::RasterizerState raster_state(canvas, raster_state_desc);
canvas.set_rasterizer_state(raster_state);
clan::PrimitivesArray primarray(gc);
clan::VertexArrayVector<clan::Vec2f> gpu_positions = clan::VertexArrayVector<clan::Vec2f>(gc, &positions[0], positions.size());
clan::VertexArrayVector<clan::Colorf> gpu_colors = clan::VertexArrayVector<clan::Colorf>(gc, &colors[0], colors.size());
primarray.set_attributes(0, gpu_positions);
primarray.set_attributes(1, gpu_colors);
ProgramUniforms buffer;
buffer.cl_ModelViewProjectionMatrix = canvas.get_projection() * canvas.get_modelview();
clan::UniformVector<ProgramUniforms> uniform_vector(gc, &buffer, 1);
gc.set_uniform_buffer(0, uniform_vector);
gc.set_texture(0, texture_particle);
gc.set_program_object(program_object);
gc.draw_primitives(clan::type_points, num_particles, primarray);
gc.reset_program_object();
gc.reset_texture(0);
gc.reset_blend_state();
gc.reset_rasterizer_state();
}
window.flip(1);
clan::KeepAlive::process();
}
return 0;
}
// The start of the Application
int App::start(const std::vector<std::string> &args)
{
clan::DisplayWindowDescription win_desc;
win_desc.set_allow_resize(true);
win_desc.set_stencil_size(8);
// For simplicity this example does not use the depth components
//win_desc.set_depth_size(16);
win_desc.set_title("Stencil Example");
win_desc.set_size(clan::Size( 900, 570 ), false);
clan::DisplayWindow window(win_desc);
clan::Slot slot_quit = window.sig_window_close().connect(this, &App::on_window_close);
clan::Slot slot_input_up = (window.get_ic().get_keyboard()).sig_key_up().connect(this, &App::on_input_up);
std::string theme;
if (clan::FileHelp::file_exists("../../../Resources/GUIThemeAero/theme.css"))
theme = "../../../Resources/GUIThemeAero";
else if (clan::FileHelp::file_exists("../../../Resources/GUIThemeBasic/theme.css"))
theme = "../../../Resources/GUIThemeBasic";
else
throw clan::Exception("No themes found");
clan::GUIWindowManagerTexture wm(window);
clan::GUIManager gui(wm, theme);
clan::Canvas canvas(window);
// Deleted automatically by the GUI
Options *options = new Options(gui, clan::Rect(0, 0, canvas.get_size()));
clan::Image image_grid(canvas, "../Blend/Resources/grid.png");
clan::Image image_ball(canvas, "../Blend/Resources/ball.png");
grid_space = (float) (image_grid.get_width() - image_ball.get_width());
setup_balls();
options->request_repaint();
clan::Font font(canvas, "Tahoma", 20);
clan::BlendStateDescription blend_desc;
blend_desc.enable_color_write(false, false, false, false);
clan::BlendState blend_state_no_color_write(canvas, blend_desc);
clan::GameTime game_time;
while (!quit)
{
game_time.update();
wm.process();
wm.draw_windows(canvas);
int num_balls = options->num_balls;
if (num_balls > max_balls)
num_balls = max_balls;
if (options->is_moveballs_set)
move_balls(game_time.get_time_elapsed(), num_balls);
canvas.clear_stencil(0);
// Draw the grid
const float grid_xpos = 10.0f;
const float grid_ypos = 10.0f;
image_grid.draw(canvas, grid_xpos, grid_ypos);
clan::DepthStencilStateDescription stencil_desc;
// Draw the circle onto the stencil
if (options->is_circle_set)
{
stencil_desc.enable_stencil_test(true);
stencil_desc.set_stencil_compare_front(clan::compare_always, 255, 255);
stencil_desc.set_stencil_compare_back(clan::compare_always, 255, 255);
stencil_desc.set_stencil_op_front(clan::stencil_incr_wrap, clan::stencil_incr_wrap, clan::stencil_incr_wrap);
stencil_desc.set_stencil_op_back(clan::stencil_incr_wrap, clan::stencil_incr_wrap, clan::stencil_incr_wrap);
stencil_desc.enable_depth_write(false);
stencil_desc.enable_depth_test(false);
clan::DepthStencilState stencil_state(canvas, stencil_desc);
canvas.set_depth_stencil_state(stencil_state);
canvas.set_blend_state(blend_state_no_color_write);
canvas.fill_circle(grid_xpos + image_grid.get_width()/2, grid_ypos + image_grid.get_height()/2, 100, clan::Colorf::white);
canvas.reset_blend_state();
}
stencil_desc.enable_stencil_test(true);
stencil_desc.set_stencil_compare_front(options->compare_function, options->compare_reference, 255);
stencil_desc.set_stencil_compare_back(options->compare_function, options->compare_reference, 255);
stencil_desc.set_stencil_op_front(options->stencil_fail, options->stencil_pass, options->stencil_pass);
stencil_desc.set_stencil_op_back(options->stencil_fail, options->stencil_pass, options->stencil_pass);
// Note, depth testing disabled for this example
stencil_desc.enable_depth_write(false);
stencil_desc.enable_depth_test(false);
clan::BlendState blend_state(canvas, blend_desc);
clan::DepthStencilState stencil_state(canvas, stencil_desc);
canvas.set_depth_stencil_state(stencil_state);
for (int cnt=0; cnt<num_balls; cnt++)
{
image_ball.draw(canvas, grid_xpos + balls[cnt].xpos, grid_ypos + balls[cnt].ypos);
}
canvas.reset_depth_stencil_state();
clan::Image stencil_image = get_stencil(canvas,
clan::Rect(grid_xpos, grid_ypos, image_grid.get_width(), image_grid.get_height()));
const float stencil_image_xpos = 400.0f;
const float stencil_image_ypos = 30.0f;
const float stencil_image_scale = 0.5f;
stencil_image.set_scale(stencil_image_scale, stencil_image_scale);
stencil_image.draw(canvas, stencil_image_xpos, stencil_image_ypos);
canvas.draw_box(clan::Rectf(stencil_image_xpos, stencil_image_ypos, clan::Sizef(stencil_image.get_width() * stencil_image_scale, stencil_image.get_height() * stencil_image_scale)), clan::Colorf::white);
font.draw_text(canvas, stencil_image_xpos, stencil_image_ypos - 4.0f, "Stencil", clan::Colorf::black);
// Add a note to avoid confusion
font.draw_text(canvas, 10.0f, 500.0, "(This example does not use the stencil depth buffer comparison or the stencil bitmask)", clan::Colorf::black);
window.flip(1);
clan::KeepAlive::process();
}
return 0;
}
