void HSV::render_texture(Canvas &canvas, ProgramObject &program, Texture &texture, float hue_offset)
{
GraphicContext gc = canvas.get_gc();
Rectf rect(0.0f, 0.0f, (float)gc.get_width(), (float)gc.get_height());
Rectf texture_unit1_coords(0.0f, 0.0f, 1.0f, 1.0f);
Vec2f positions[6] =
{
Vec2f(rect.left, rect.top),
Vec2f(rect.right, rect.top),
Vec2f(rect.left, rect.bottom),
Vec2f(rect.right, rect.top),
Vec2f(rect.left, rect.bottom),
Vec2f(rect.right, rect.bottom)
};
Vec2f tex1_coords[6] =
{
Vec2f(texture_unit1_coords.left, texture_unit1_coords.top),
Vec2f(texture_unit1_coords.right, texture_unit1_coords.top),
Vec2f(texture_unit1_coords.left, texture_unit1_coords.bottom),
Vec2f(texture_unit1_coords.right, texture_unit1_coords.top),
Vec2f(texture_unit1_coords.left, texture_unit1_coords.bottom),
Vec2f(texture_unit1_coords.right, texture_unit1_coords.bottom)
};
PrimitivesArray primarray(gc);
VertexArrayVector<Vec2f> gpu_positions = VertexArrayVector<Vec2f>(gc, positions, 6);
VertexArrayVector<Vec2f> gpu_tex1_coords = VertexArrayVector<Vec2f>(gc, tex1_coords, 6);
primarray.set_attributes(0, gpu_positions);
primarray.set_attributes(1, gpu_tex1_coords);
ProgramUniforms buffer;
buffer.cl_ModelViewProjectionMatrix = canvas.get_projection() * canvas.get_modelview();
buffer.HueOffset0 = hue_offset;
UniformVector<ProgramUniforms> uniform_vector(gc, &buffer, 1);
gc.set_uniform_buffer(0, uniform_vector);
gc.set_texture(0, texture);
gc.set_program_object(program);
gc.draw_primitives(type_triangles, 6, primarray);
gc.reset_program_object();
gc.reset_texture(0);
}
// 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;
}
bool App::update()
{
game_time.update();
options->set_needs_render();
options->set_rect(clan::Size(canvas.get_size()));
options->update(clan::Colorf(0.6f, 0.6f, 0.2f, 1.0f));
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_transform();
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);
return !quit;
}
