sphere_renderer.h

#pragma once
 
#include "surface_renderer.h"
 
#include "gl/lib_begin.h"
 
namespace cgv { // @<
    namespace render { // @<
        class CGV_API sphere_renderer;


        extern CGV_API sphere_renderer& ref_sphere_renderer(context& ctx, int ref_count_change = 0);

        struct CGV_API sphere_render_style : public surface_render_style
        {
            /*@name sphere rendering attributes*/

            float radius_scale = 1.0f;
            float radius = 1.0f;
            bool use_group_radius = false;
            float blend_width_in_pixel = 0.0f;
            float halo_width_in_pixel = 0.0f;
            float percentual_halo_width = 0.0f;
            cgv::rgba halo_color = { 1.0f };
            float halo_color_strength = 0.5f;
        };

        class CGV_API sphere_renderer : public surface_renderer
        {
        protected:
            bool has_radii = false;
            bool has_group_radii = false;
            float y_view_angle = 45.0f;
            std::string get_default_prog_name() const override { return "sphere.glpr"; }
            render_style* create_render_style() const override { return new sphere_render_style(); }
        public:
            void enable_attribute_array_manager(const context& ctx, attribute_array_manager& aam) override;
            void disable_attribute_array_manager(const context& ctx, attribute_array_manager& aam) override;
            void set_y_view_angle(float y_view_angle);
            template <typename T = float>
            void set_radius(const context& ctx, const T& radius) { has_radii = true; ref_prog().set_attribute(ctx, ref_prog().get_attribute_location(ctx, "radius"), radius); }
            template <typename T = float>
            void set_radius_array(const context& ctx, const std::vector<T>& radii) { has_radii = true; set_attribute_array(ctx, "radius", radii); }
            template <typename T = float>
            void set_radius_array(const context& ctx, const T* radii, size_t nr_elements, unsigned stride_in_bytes = 0) { has_radii = true;  set_attribute_array(ctx, "radius", radii, nr_elements, stride_in_bytes); }
            void remove_radius_array(const context& ctx);
            template <typename T = float>
            void set_group_radii(const context& ctx, const std::vector<T>& group_radii) { has_group_radii = true; ref_prog().set_uniform_array(ctx, "group_radii", group_radii); }
            template <typename T = float>
            void set_sphere(const context& ctx, const cgv::math::fvec<T, 4>& sphere) {
                ref_prog().set_attribute(ctx, ref_prog().get_attribute_location(ctx, "position"), (const cgv::math::fvec<T, 3>&)sphere);
                ref_prog().set_attribute(ctx, ref_prog().get_attribute_location(ctx, "radius"), sphere[3]);
                has_positions = true;
                has_radii = true;
            }
            template <typename T = float>
            void set_sphere_array(const context& ctx, const std::vector<cgv::math::fvec<T, 4> >& spheres) {
                set_composed_attribute_array(ctx, "position", &spheres.front(), spheres.size(), reinterpret_cast<const cgv::math::fvec<T, 3>&>(spheres.front()));
                ref_composed_attribute_array(ctx, "radius", "position", &spheres.front(), spheres.size(), spheres[0][3]);
                has_positions = true;
                has_radii = true;
            }

            bool validate_attributes(const context& ctx) const override;
            bool enable(context& ctx) override;
            bool disable(context& ctx) override;
            void draw(context& ctx, size_t start, size_t count,
                bool use_strips = false, bool use_adjacency = false, uint32_t strip_restart_index = -1) override;
        };
 
        struct CGV_API sphere_render_style_reflect : public sphere_render_style
        {
            bool self_reflect(cgv::reflect::reflection_handler& rh);
        };
        extern CGV_API cgv::reflect::extern_reflection_traits<sphere_render_style, sphere_render_style_reflect> get_reflection_traits(const sphere_render_style&);
    }
}
 
 
#include <cgv/config/lib_end.h>