point_renderer.cxx

#include "point_renderer.h"
#include <cgv_reflect_types/media/color.h>
#include <cgv_gl/gl/gl.h>
#include <cgv_gl/gl/gl_tools.h>
 
namespace cgv {
    namespace render {
        point_renderer& ref_point_renderer(context& ctx, int ref_count_change)
        {
            static int ref_count = 0;
            static point_renderer r;
            r.manage_singleton(ctx, "point_renderer", ref_count, ref_count_change);
            return r;
        }
 
        render_style* point_renderer::create_render_style() const
        {
            return new point_render_style();
        }
 
        point_render_style::point_render_style() : halo_color(1, 1, 1, 1)
        {
            point_size = 1.0f;
            use_group_point_size = false;
            measure_point_size_in_pixel = true;
            screen_aligned = true;
 
            blend_points = true;
            blend_width_in_pixel = 1.0f;
            halo_width_in_pixel = 0.0f;
            percentual_halo_width = 0.0f;
            halo_color_strength = 0.5f;
            default_depth_offset = 0.0f;
        }
 
        point_renderer::point_renderer()
        {
            has_point_sizes = false;
            has_group_point_sizes = false;
            has_indexed_colors = false;
            has_depth_offsets = false;
            reference_point_size = 0.01f;
            y_view_angle = 45;
        }
        void point_renderer::enable_attribute_array_manager(const context& ctx, attribute_array_manager& aam)
        {
            group_renderer::enable_attribute_array_manager(ctx, aam);
            if (has_attribute(ctx, "point_size"))
                has_point_sizes = true;
            if (has_attribute(ctx, "color_index"))
                has_indexed_colors = true;
            if (has_attribute(ctx, "depth_offset"))
                has_depth_offsets = true;
        }
        void point_renderer::disable_attribute_array_manager(const context& ctx, attribute_array_manager& aam)
        {
            group_renderer::disable_attribute_array_manager(ctx, aam);
            has_point_sizes = false;
            has_indexed_colors = false;
            has_depth_offsets = false;
        }
        void point_renderer::remove_point_size_array(const context& ctx) {
            has_point_sizes = false;
            remove_attribute_array(ctx, "point_size");
        }
        void point_renderer::remove_depth_offset_array(const context& ctx) {
            has_depth_offsets = false;
            remove_attribute_array(ctx, "depth_offset");
        }
        void point_renderer::remove_indexed_color_array(const context& ctx) {
            has_indexed_colors = false;
            remove_attribute_array(ctx, "indexed_color");
        }
        void point_renderer::set_reference_point_size(float _reference_point_size)
        {
            reference_point_size = _reference_point_size;
        }
        void point_renderer::set_y_view_angle(float _y_view_angle)
        {
            y_view_angle = _y_view_angle;
        }
        bool point_renderer::build_shader_program(context& ctx, shader_program& prog, const shader_define_map& defines)
        {
            return prog.build_program(ctx, "point.glpr", true, defines);
        }
        bool point_renderer::validate_attributes(const context& ctx) const
        {
            const point_render_style& prs = get_style<point_render_style>();
            bool res;
            if (!prs.use_group_color) {
                if (has_indexed_colors) {
                    if (has_colors)
                        ctx.error("point_renderer::validate_attributes() both point color and color index attributes set, using color index");
                    bool tmp = has_colors;
                    has_colors = true;
                    res = group_renderer::validate_attributes(ctx);
                    has_colors = tmp;
                }
                else
                    res = group_renderer::validate_attributes(ctx);
            }
            else
                res = group_renderer::validate_attributes(ctx);
            if (!has_group_point_sizes && prs.use_group_point_size) {
                ctx.error("point_renderer::validate_attributes() group_point_sizes not set");
                res = false;
            }
            return res;
        }
        bool point_renderer::enable(cgv::render::context& ctx)
        {
            const point_render_style& prs = get_style<point_render_style>();
 
            bool res;
            if (!prs.use_group_color && has_indexed_colors) {
                bool tmp = has_colors;
                has_colors = true;
                res = group_renderer::enable(ctx);
                has_colors = tmp;
            }
            else
                res = group_renderer::enable(ctx);
 
            glPointSize(prs.point_size);
            if (prs.blend_points) {
                glEnable(GL_BLEND);
                glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
            }
            if (ref_prog().is_linked()) {
                if (!has_point_sizes)
                    ref_prog().set_attribute(ctx, "point_size", prs.point_size);
                if (!has_depth_offsets)
                    ref_prog().set_attribute(ctx, "depth_offset", prs.default_depth_offset);
                ref_prog().set_uniform(ctx, "use_color_index", has_indexed_colors);
                ref_prog().set_uniform(ctx, "measure_point_size_in_pixel", prs.measure_point_size_in_pixel);
                ref_prog().set_uniform(ctx, "screen_aligned", prs.screen_aligned);
                ref_prog().set_uniform(ctx, "reference_point_size", reference_point_size);
                ref_prog().set_uniform(ctx, "use_group_point_size", prs.use_group_point_size);
                ref_prog().set_uniform(ctx, "viewport_height", (float)ctx.get_height());
                ref_prog().set_uniform(ctx, "blend_width_in_pixel", prs.blend_width_in_pixel);
                ref_prog().set_uniform(ctx, "percentual_halo_width", 0.01f*prs.percentual_halo_width);
                ref_prog().set_uniform(ctx, "halo_width_in_pixel", prs.halo_width_in_pixel);
                ref_prog().set_uniform(ctx, "halo_color", prs.halo_color);
                ref_prog().set_uniform(ctx, "halo_color_strength", prs.halo_color_strength);
            }
            return res;
        }
 
        bool point_renderer::disable(cgv::render::context& ctx)
        {
            const point_render_style& prs = get_style<point_render_style>();
            if (prs.blend_points) {
                glDisable(GL_BLEND);
            }
            if (!attributes_persist()) {
                has_indexed_colors = false;
                has_point_sizes = false;
                has_depth_offsets = false;
            }
            return group_renderer::disable(ctx);
        }
 
        void point_renderer::draw(context& ctx, size_t start, size_t count, bool use_strips, bool use_adjacency, uint32_t strip_restart_index)
        {
            draw_impl(ctx, PT_POINTS, start, count, false, false, -1);
        }
 
        bool point_render_style_reflect::self_reflect(cgv::reflect::reflection_handler& rh)
        {
            return
                rh.reflect_base(*static_cast<group_render_style*>(this)) &&
                rh.reflect_member("point_size", point_size) &&
                rh.reflect_member("use_group_point_size", use_group_point_size) &&
                rh.reflect_member("measure_point_size_in_pixel", measure_point_size_in_pixel) &&
                rh.reflect_member("screen_aligned", screen_aligned) &&
                rh.reflect_member("default_depth_offset", default_depth_offset) &&
                rh.reflect_member("blend_points", blend_points) &&
                rh.reflect_member("blend_width_in_pixel", blend_width_in_pixel) &&
                rh.reflect_member("halo_width_in_pixel", halo_width_in_pixel) &&
                rh.reflect_member("halo_color", halo_color) &&
                rh.reflect_member("halo_color_strength", halo_color_strength) &&
                rh.reflect_member("percentual_halo_width", percentual_halo_width);
        }
        cgv::reflect::extern_reflection_traits<point_render_style, point_render_style_reflect> get_reflection_traits(const cgv::render::point_render_style&)
        {
            return cgv::reflect::extern_reflection_traits<point_render_style, point_render_style_reflect>();
        }
    }
}
 
#include <cgv/gui/provider.h>
 
namespace cgv {
    namespace gui {
 
        struct point_render_style_gui_creator : public gui_creator
        {
            bool create(provider* p, const std::string& label,
                void* value_ptr, const std::string& value_type,
                const std::string& gui_type, const std::string& options, bool*)
            {
                if (value_type != cgv::type::info::type_name<cgv::render::point_render_style>::get_name())
                    return false;
                cgv::render::point_render_style* prs_ptr = reinterpret_cast<cgv::render::point_render_style*>(value_ptr);
                cgv::base::base* b = dynamic_cast<cgv::base::base*>(p);
 
                p->add_member_control(b, "Screen Aligned", prs_ptr->screen_aligned, "toggle");
                p->add_member_control(b, "Point Size", prs_ptr->point_size, "value_slider", "label='';w=130;min=0.01;max=50;log=true;ticks=true", "");
                p->add_member_control(b, "px", prs_ptr->measure_point_size_in_pixel, "toggle", "w=16", "");
                p->add_member_control(b, "Blend", prs_ptr->blend_points, "toggle", "w=50");
                p->add_member_control(b, "Default Depth Offset", prs_ptr->default_depth_offset, "value_slider", "min=0.000001;max=0.1;step=0.0000001;log=true;ticks=true");
                bool show = p->begin_tree_node("Halo", prs_ptr->halo_color, false, "options='w=120';level=3;align=''");
                p->add_member_control(b, "Color", prs_ptr->halo_color, "", "w=50");
                if (show) {
                    p->align("\a");
                    p->add_member_control(b, "Halo Color Strength", prs_ptr->halo_color_strength, "value_slider", "min=0;max=1;ticks=true");
                    p->add_member_control(b, "Halo Width in Pixel", prs_ptr->halo_width_in_pixel, "value_slider", "min=-10;max=10;ticks=true");
                    p->add_member_control(b, "Percentual Halo Width", prs_ptr->percentual_halo_width, "value_slider", "min=-100;max=100;ticks=true");
                    p->add_member_control(b, "Blend Width in Pixel", prs_ptr->blend_width_in_pixel, "value_slider", "min=0;max=3;ticks=true");
                    p->align("\b");
                    p->end_tree_node(prs_ptr->halo_color);
                }
                if (p->begin_tree_node("Use of Group Information", prs_ptr->use_group_color, false, "level=3")) {
                    p->align("\a");
                    p->add_gui("group_render_style", *static_cast<cgv::render::group_render_style*>(prs_ptr));
                    p->align("\b");
                    p->end_tree_node(prs_ptr->use_group_color);
                }
                return true;
            }
        };
 
#include "gl/lib_begin.h"
 
CGV_API cgv::gui::gui_creator_registration<point_render_style_gui_creator> point_rs_gc_reg("point_render_style_gui_creator");
 
    }
}