void DeferredRenderer::DrawDirectionalLight(const Light &light) {
SR_ASSERT(light.type == kLightDirection);
//동적 라이팅중에서 구조가 가장 간단한 방향으로 뱉어지는 빛이다. 이것의 경우
//그냥 화면 전체에 대해서 2d로 잘 적용하면 된다
Device *device = Device::GetInstance();
RenderState &render_state = device->render_state();
Shader &shader = directional_shader();
render_state.UseShader(shader);
//빛 계산에 쓰이는 공용 속성 설정
SetCommonLightUniform(shader, light);
//방향성빛은 방향만 잇으니까 행렬의 3*3만 쓴다
mat3 model_mat(render_state.model_mat());
mat3 light_mat(model_mat);
vec3 light_target_pos(light.dir);
vec3 viewspace_light_target_pos(light_mat * light_target_pos);
vec3 light_dir = normalize(viewspace_light_target_pos);
//빛 방향을 디버깅을 위해서 출력하기
//Draw2DManager *draw_2d_mgr = device->draw_2d();
//char light_dir_buf[128];
//sprintf(light_dir_buf, "LightDir:%.4f, %.4f, %.4f", light_dir.x, light_dir.y, light_dir.z);
//draw_2d_mgr->AddString(vec2(0, 100), light_dir_buf, Color4ub::Red(), 1.0f);
shader.SetUniformVector("u_lightDir", light_dir);
SetCommonLightQuadDraw(shader);
}
TexturedQuadPassDescription::TexturedQuadPassDescription()
: PipelinePassDescription() {
vertex_shader_ = "resources/shaders/common/quad.vert";
fragment_shader_ = "resources/shaders/textured_quad.frag";
name_ = "TexturedQuadPass";
needs_color_buffer_as_input_ = false;
writes_only_color_buffer_ = false;
enable_for_shadows_ = true;
rendermode_ = RenderMode::Callback;
rasterizer_state_ = boost::make_optional(scm::gl::rasterizer_state_desc(
scm::gl::FILL_SOLID, scm::gl::CULL_NONE));
depth_stencil_state_ = boost::make_optional(
scm::gl::depth_stencil_state_desc(
true, true, scm::gl::COMPARISON_LESS, true, 1, 0,
scm::gl::stencil_ops(scm::gl::COMPARISON_EQUAL)
)
);
process_ = [](
PipelinePass & pass, PipelinePassDescription const&, Pipeline & pipe) {
for (auto const& node : pipe.current_viewstate().scene->nodes[std::type_index(typeid(node::TexturedQuadNode))]) {
auto quad_node(reinterpret_cast<node::TexturedQuadNode*>(node));
UniformValue model_mat(scm::math::mat4f(quad_node->get_scaled_world_transform()));
UniformValue normal_mat(scm::math::mat4f(scm::math::transpose(scm::math::inverse(quad_node->get_scaled_world_transform()))));
UniformValue tex(quad_node->data.get_texture());
UniformValue flip(scm::math::vec2i(quad_node->data.get_flip_x() ? -1 : 1, quad_node->data.get_flip_y() ? -1 : 1));
auto const& ctx(pipe.get_context());
pass.shader_->apply_uniform(ctx, "gua_model_matrix", model_mat);
pass.shader_->apply_uniform(ctx, "gua_normal_matrix", normal_mat);
pass.shader_->apply_uniform(ctx, "gua_in_texture", tex);
pass.shader_->apply_uniform(ctx, "flip", flip);
pipe.draw_quad();
}
};
}
