plot2d.cxx

#include "plot2d.h"
#include <libs/cgv_gl/gl/gl.h>
#include <cgv/media/color_scale.h>
#include <cgv/render/attribute_array_binding.h>
#include <cgv/math/ftransform.h>
 
namespace cgv {
    namespace plot {
 
plot2d_config::plot2d_config(const std::string& _name) : plot_base_config(_name, 2)
{
    configure_chart(CT_LINE_CHART);
};
 
void plot2d_config::configure_chart(ChartType chart_type)
{
    plot_base_config::configure_chart(chart_type);
    show_lines = chart_type == CT_LINE_CHART;
}
 
plot2d::plot2d(const std::string& title, unsigned nr_attributes) : plot_base(2, nr_attributes)
{
    multi_axis_modes = new bool[2 + nr_attributes];
    std::fill(multi_axis_modes, multi_axis_modes+(2+nr_attributes), false);
    sub_plot_delta = vec3(0.0f);
    disable_depth_mask = false;
    //legend_components = LC_ANY;
    get_domain_config_ptr()->title = title;
    auto& acs = get_domain_config_ptr()->axis_configs;
    acs[0].name = "x";
    acs[1].name = "y";
    for (unsigned ai =0; ai < nr_attributes; ++ai)
        acs[ai+2].name = std::string("attribute_")+cgv::utils::to_string(ai);
}
 
plot2d::~plot2d()
{
    delete[] multi_axis_modes;
}
 
bool plot2d::compute_sample_coordinate_interval(int i, int ai, float& samples_min, float& samples_max)
{
    // compute bounding box
    bool found_sample = false;
    float min_value, max_value;
    for (unsigned j = 0; j < samples[i].size(); ++j) {
        if (found_sample) {
            min_value = std::min(min_value, samples[i][j](ai));
            max_value = std::max(max_value, samples[i][j](ai));
        }
        else {
            min_value = samples[i][j](ai);
            max_value = samples[i][j](ai);
            found_sample = true;
        }
    }
    if (found_sample) {
        samples_min = min_value;
        samples_max = max_value;
        return true;
    }
    return false;
}
 
unsigned plot2d::add_sub_plot(const std::string& name)
{
    // determine index of new sub plot
    unsigned i = get_nr_sub_plots();
 
    // create new config
    if (i == 0)
        configs.push_back(new plot2d_config(name));
    else {
        configs.push_back(new plot2d_config(ref_sub_plot2d_config(i - 1)));
        ref_sub_plot_config(i).name = name;
    }
 
    // create new point container
    samples.push_back(std::vector<vec2>());
    strips.push_back(std::vector<unsigned>());
    attribute_source_arrays.push_back(attribute_source_array());
    attribute_source_arrays.back().attribute_sources.push_back(attribute_source(i, 0, 0, 2 * sizeof(float)));
    attribute_source_arrays.back().attribute_sources.push_back(attribute_source(i, 1, 0, 2 * sizeof(float)));
    // return sub plot index
    return i;
}
 
void plot2d::delete_sub_plot(unsigned i)
{
    delete configs[i];
    configs[i] = 0;
    configs.erase(configs.begin() + i);
    samples.erase(samples.begin() + i);
    strips.erase(strips.begin() + i);
}
 
plot2d_config& plot2d::ref_sub_plot2d_config(unsigned i)
{
    return static_cast<plot2d_config&>(ref_sub_plot_config(i));
}
 
std::vector<vec2>& plot2d::ref_sub_plot_samples(unsigned i)
{
    return samples[i];
}
 
std::vector<unsigned>& plot2d::ref_sub_plot_strips(unsigned i)
{
    return strips[i];
}
 
bool plot2d::init(cgv::render::context& ctx)
{
    aam_domain.init(ctx);
    aam_domain_tick_labels.init(ctx);
    if (!line_prog.build_program(ctx, "plot2d_line.glpr", true)) {
        std::cerr << "could not build GLSL program from plot2d_line.glpr" << std::endl;
        return false;
    }
    else
        line_prog.allow_context_to_set_color(false);
    if (!point_prog.build_program(ctx, "plot2d_point.glpr", true)) {
        std::cerr << "could not build GLSL program from plot2d_point.glpr" << std::endl;
        return false;
    }
    else 
        point_prog.allow_context_to_set_color(false);
 
    cgv::render::shader_compile_options options;
    options.define_macro("PLOT_MODE", "1");
    if (!rectangle_prog.build_program(ctx, "plot2d_rect.glpr", options, true)) {
        std::cerr << "could not build GLSL program from plot2d_rect.glpr" << std::endl;
        return false;
    }
    else
        rectangle_prog.allow_context_to_set_color(false);
    return plot_base::init(ctx);
}
 
void plot2d::clear(cgv::render::context& ctx)
{
    aam_domain.destruct(ctx);
    aam_domain_tick_labels.destruct(ctx);
    point_prog.destruct(ctx);
    line_prog.destruct(ctx);
    rectangle_prog.destruct(ctx);
    plot_base::clear(ctx);
}
 
bool plot2d::draw_point_plot(cgv::render::context& ctx, int i, int layer_idx)
{
    // skip unvisible and empty sub plots
    if (!ref_sub_plot2d_config(i).show_plot)
        return false;
    GLsizei count = (GLsizei)enable_attributes(ctx, i, samples);
    bool result = false;
    if (count > 0) {
        const plot2d_config& spc = ref_sub_plot2d_config(i);
        if (spc.show_points && point_prog.is_linked()) {
            set_plot_uniforms(ctx, point_prog);
            set_mapping_uniforms(ctx, point_prog);
            point_prog.set_uniform(ctx, "sub_plot_delta", float(i) * sub_plot_delta);
            point_prog.set_uniform(ctx, "depth_offset", -layer_idx * layer_depth);
            point_prog.set_uniform(ctx, "reference_point_size", get_domain_config_ptr()->reference_size);
            point_prog.set_uniform(ctx, "blend_width_in_pixel", get_domain_config_ptr()->blend_width_in_pixel);
            point_prog.set_uniform(ctx, "halo_width_in_pixel", 0.0f);
            point_prog.set_uniform(ctx, "percentual_halo_width", spc.point_halo_width.size / spc.point_size.size);
            point_prog.set_uniform(ctx, "viewport_height", (float)ctx.get_height());
            point_prog.set_uniform(ctx, "measure_point_size_in_pixel", false);
            point_prog.set_uniform(ctx, "screen_aligned", false);
            point_prog.set_uniform(ctx, "color_index", spc.point_color.color_idx);
            point_prog.set_uniform(ctx, "secondary_color_index", spc.point_halo_color.color_idx);
            point_prog.set_uniform(ctx, "opacity_index", spc.point_color.opacity_idx);
            point_prog.set_uniform(ctx, "secondary_opacity_index", spc.point_halo_color.opacity_idx);
            point_prog.set_uniform(ctx, "size_index", spc.point_size.size_idx);
            point_prog.set_uniform(ctx, "secondary_size_index", spc.point_halo_width.size_idx);
            point_prog.set_attribute(ctx, point_prog.get_color_index(), spc.point_color.color);
            point_prog.set_attribute(ctx, "secondary_color", spc.point_halo_color.color);
            point_prog.set_attribute(ctx, "size", spc.point_size.size);
            point_prog.enable(ctx);
            color_scale_adapter.enable(ctx, color_scale_texture_unit);
            draw_sub_plot_samples(count, spc);
            color_scale_adapter.disable(ctx);
            point_prog.disable(ctx);
            result = true;
        }
    }
    disable_attributes(ctx, i);
    return result;
}
bool plot2d::draw_line_plot(cgv::render::context& ctx, int i, int layer_idx)
{
    // skip unvisible and empty sub plots
    if (!ref_sub_plot2d_config(i).show_plot)
        return false;
    GLsizei count = (GLsizei)enable_attributes(ctx, i, samples);
    bool result = false;
    if (count > 0) {
        const plot2d_config& spc = ref_sub_plot2d_config(i);
        if (spc.show_lines && line_prog.is_linked()) {
            set_plot_uniforms(ctx, line_prog);
            set_mapping_uniforms(ctx, line_prog);
            line_prog.set_uniform(ctx, "sub_plot_delta", float(i) * sub_plot_delta);
            line_prog.set_uniform(ctx, "depth_offset", -layer_idx * layer_depth);
            line_prog.set_uniform(ctx, "reference_line_width", get_domain_config_ptr()->reference_size);
            line_prog.set_uniform(ctx, "blend_width_in_pixel", get_domain_config_ptr()->blend_width_in_pixel);
            line_prog.set_uniform(ctx, "halo_width_in_pixel", 0.0f);
            line_prog.set_uniform(ctx, "halo_color_strength", 1.0f);
            line_prog.set_uniform(ctx, "halo_color", spc.line_halo_color.color);
            line_prog.set_uniform(ctx, "percentual_halo_width", spc.line_halo_width.size / spc.line_width.size);
            line_prog.set_uniform(ctx, "viewport_height", (float)ctx.get_height());
            line_prog.set_uniform(ctx, "measure_line_width_in_pixel", false);
            line_prog.set_uniform(ctx, "screen_aligned", false);
            line_prog.set_uniform(ctx, "color_index", spc.line_color.color_idx);
            line_prog.set_uniform(ctx, "secondary_size_index", spc.line_halo_width.size_idx);
            line_prog.set_uniform(ctx, "secondary_color_index", spc.line_halo_color.color_idx);
            line_prog.set_uniform(ctx, "opacity_index", spc.line_color.opacity_idx);
            line_prog.set_uniform(ctx, "secondary_opacity_index", spc.line_halo_color.opacity_idx);
            line_prog.set_uniform(ctx, "size_index", spc.line_width.size_idx);
            line_prog.set_attribute(ctx, line_prog.get_color_index(), spc.line_color.color);
            line_prog.set_attribute(ctx, "secondary_color", spc.line_halo_color.color);
            line_prog.set_attribute(ctx, "size", spc.line_width.size);
            color_scale_adapter.enable(ctx, color_scale_texture_unit);
            line_prog.enable(ctx);
            if (strips[i].empty())
                draw_sub_plot_samples(count, spc, true);
            else {
                unsigned fst = 0;
                for (unsigned j = 0; j < strips[i].size(); ++j) {
                    glDrawArrays(GL_LINE_STRIP, fst, strips[i][j]);
                    fst += strips[i][j];
                }
            }
            line_prog.disable(ctx);
            color_scale_adapter.disable(ctx);
            result = true;
        }
    }
    disable_attributes(ctx, i);
    return result;
}
bool plot2d::draw_stick_plot(cgv::render::context& ctx, int i, int layer_idx)
{
    // skip unvisible and empty sub plots
    if (!ref_sub_plot2d_config(i).show_plot)
        return false;
    GLsizei count = (GLsizei)enable_attributes(ctx, i, samples);
    bool result = false;
    if (count > 0) {
        const plot2d_config& spc = ref_sub_plot2d_config(i);
        if (spc.show_sticks && rectangle_prog.is_linked()) {
            // configure vertex shader
            rectangle_prog.set_uniform(ctx, "sub_plot_delta", float(i) * sub_plot_delta);
            rectangle_prog.set_uniform(ctx, "color_index", spc.stick_color.color_idx);
            rectangle_prog.set_uniform(ctx, "secondary_color_index", -1);
            rectangle_prog.set_uniform(ctx, "opacity_index", spc.stick_color.opacity_idx);
            rectangle_prog.set_uniform(ctx, "secondary_opacity_index", -1);
            rectangle_prog.set_uniform(ctx, "size_index", spc.stick_width.size_idx);
            rectangle_prog.set_uniform(ctx, "secondary_size_index", -1);
            rectangle_prog.set_uniform(ctx, "rectangle_base_window", spc.stick_base_window);
            rectangle_prog.set_uniform(ctx, "rectangle_coordinate_index", spc.stick_coordinate_index);
            rectangle_prog.set_uniform(ctx, "rectangle_border_width", 0.0f);
            rectangle_prog.set_attribute(ctx, rectangle_prog.get_color_index(), spc.stick_color.color);
            rectangle_prog.set_attribute(ctx, "size", spc.stick_width.size * get_domain_config_ptr()->reference_size);
            rectangle_prog.set_attribute(ctx, "depth_offset", -layer_idx * layer_depth);
            // configure geometry shader
            rectangle_prog.set_uniform(ctx, "border_mode", spc.stick_coordinate_index == 0 ? 2 : 1);
 
            color_scale_adapter.enable(ctx, color_scale_texture_unit);
            rectangle_prog.enable(ctx);
            draw_sub_plot_samples(count, spc);
            rectangle_prog.disable(ctx);
            color_scale_adapter.disable(ctx);
            result = true;
        }
    }
    disable_attributes(ctx, i);
    return result;
}
void plot2d::configure_bar_plot(cgv::render::context& ctx)
{
    // prepare rectangle program to draw bar and stick plots
    set_plot_uniforms(ctx, rectangle_prog);
    set_mapping_uniforms(ctx, rectangle_prog);
    // configure geometry shader
    rectangle_prog.set_uniform(ctx, "pixel_blend", 2.0f);
    rectangle_prog.set_uniform(ctx, "viewport_height", (float)ctx.get_height());
    // configure fragment shader
    rectangle_prog.set_uniform(ctx, "use_texture", false);
    // configure side shader
    rectangle_prog.set_uniform(ctx, "culling_mode", 0);
    rectangle_prog.set_uniform(ctx, "map_color_to_material", 7);
    rectangle_prog.set_uniform(ctx, "illumination_mode", 0);
}
 
bool plot2d::draw_bar_plot(cgv::render::context& ctx, int i, int layer_idx)
{
    // skip unvisible and empty sub plots
    if (!ref_sub_plot2d_config(i).show_plot)
        return false;
    bool result = false;
    GLsizei count = (GLsizei)enable_attributes(ctx, i, samples);
    if (count > 0) {
        const plot2d_config& spc = ref_sub_plot2d_config(i);
        if (spc.show_bars && rectangle_prog.is_linked()) {
            // configure vertex shader
            rectangle_prog.set_uniform(ctx, "sub_plot_delta", float(i) * sub_plot_delta);
            rectangle_prog.set_uniform(ctx, "color_index", spc.bar_color.color_idx);
            rectangle_prog.set_uniform(ctx, "secondary_color_index", spc.bar_outline_color.color_idx);
            rectangle_prog.set_uniform(ctx, "opacity_index", spc.bar_color.opacity_idx);
            rectangle_prog.set_uniform(ctx, "secondary_opacity_index", spc.bar_outline_color.opacity_idx);
            rectangle_prog.set_uniform(ctx, "size_index", spc.bar_percentual_width.size_idx);
            rectangle_prog.set_uniform(ctx, "secondary_size_index", spc.bar_outline_width.size_idx);
            rectangle_prog.set_uniform(ctx, "rectangle_base_window", spc.bar_base_window);
            rectangle_prog.set_uniform(ctx, "rectangle_coordinate_index", spc.bar_coordinate_index);
            rectangle_prog.set_uniform(ctx, "rectangle_border_width", spc.bar_outline_width.size * get_domain_config_ptr()->reference_size);
            rectangle_prog.set_attribute(ctx, rectangle_prog.get_color_index(), spc.bar_color.color);
            rectangle_prog.set_attribute(ctx, "secondary_color", spc.bar_outline_color.color);
            rectangle_prog.set_attribute(ctx, "size", (count > 1 ? extent[0] / (count - 1) : extent[0]) * spc.bar_percentual_width.size);
            rectangle_prog.set_attribute(ctx, "depth_offset", -layer_idx * layer_depth);
            // configure geometry shader
            rectangle_prog.set_uniform(ctx, "border_mode", spc.bar_coordinate_index == 0 ? 2 : 1);
 
            color_scale_adapter.enable(ctx, color_scale_texture_unit);
            rectangle_prog.enable(ctx);
            draw_sub_plot_samples(count, spc);
            rectangle_prog.disable(ctx);
            color_scale_adapter.disable(ctx);
            result = true;
        }
    }
    disable_attributes(ctx, i);
    return result;
}
 
int plot2d::draw_sub_plots_jointly(cgv::render::context& ctx, int layer_idx)
{
    // first draw all bar plots
    unsigned i;
    for (i = 0; i < get_nr_sub_plots(); ++i) {
        draw_bar_plot(ctx, i, layer_idx);
        ++layer_idx;
    }
    // next draw stick plots
    for (i = 0; i < get_nr_sub_plots(); ++i) {
        draw_stick_plot(ctx, i, layer_idx);
        ++layer_idx;
    }
    // then we draw line plots
    for (i = 0; i < get_nr_sub_plots(); ++i) {
        draw_line_plot(ctx, i, layer_idx);
        ++layer_idx;
    }
    // finally draw point plots
    for (i = 0; i < get_nr_sub_plots(); ++i) {
        draw_point_plot(ctx, i, layer_idx);
        ++layer_idx;
    }
    return layer_idx;
}
 
void plot2d::extract_domain_rectangles(std::vector<box2>& R, std::vector<rgb>& C, std::vector<float>& D)
{
    R.resize(5);
    C.resize(5);
    D.resize(5);
    vec2 extent = vec2(this->extent[0], this->extent[1]);
    float rs = get_domain_config_ptr()->reference_size;
    R[0] = box2(-0.5f * extent, 0.5f * extent);
    R[0].add_point(0.5f * extent + float(get_nr_sub_plots() - 1) * vec2(sub_plot_delta[0], sub_plot_delta[1]));
    C[0] = get_domain_config_ptr()->color;
    D[0] = 0.0f;
    for (unsigned ai = 0; ai < 2; ++ai) {
        axis_config& ac = get_domain_config_ptr()->axis_configs[ai];
        axis_config& ao = get_domain_config_ptr()->axis_configs[1 - ai];
        float lw = rs * ac.line_width;
        rgb col = get_domain_config_ptr()->fill ? ac.color : get_domain_config_ptr()->color;
        vec2 axis_extent(0.0f);
        axis_extent[ai] = extent[ai];
        axis_extent[1 - ai] = lw;
        box2 axis_box(-0.5f * axis_extent, 0.5f * axis_extent);
        axis_box.ref_min_pnt()[1 - ai] += 0.5f * (extent[1 - ai] - lw);
        axis_box.ref_max_pnt()[1 - ai] += 0.5f * (extent[1 - ai] - lw);
        R[2 * ai + 1] = axis_box;
        C[2 * ai + 1] = col;
        D[2 * ai + 1] = -layer_depth;
        axis_box.ref_min_pnt()[1 - ai] -= extent[1 - ai] - lw;
        axis_box.ref_max_pnt()[1 - ai] -= extent[1 - ai] - lw;
        R[2 * ai + 2] = axis_box;
        C[2 * ai + 2] = col;
        D[2 * ai + 2] = -layer_depth;
        // axis line
        if (ao.get_attribute_min() < 0 && ao.get_attribute_max() > 0) {
            float axis_plot = ao.plot_space_from_attribute_space(0.0f);
            axis_box.ref_min_pnt()[1 - ai] = axis_plot - 0.5f * lw;
            axis_box.ref_max_pnt()[1 - ai] = axis_plot + 0.5f * lw;
            R.push_back(axis_box);
            C.push_back(ac.color);
            D.push_back(-2 * layer_depth);
        }
    }
}
 
/*
bool plot2d::extract_tick_rectangles_and_tick_labels(
    std::vector<box2>& R, std::vector<rgb>& C, std::vector<float>& D,
    std::vector<label_info>& tick_labels, int ai, int ti, float he, float z_plot)
{
    axis_config& ac = get_domain_config_ptr()->axis_configs[ai];
    float acw = 1.5f * ac.line_width * get_domain_config_ptr()->reference_size;
    tick_config& tc = ti == 0 ? ac.primary_ticks : ac.secondary_ticks;
    if (tc.type == TT_NONE)
        return false;
    float min_tick = ac.tick_space_from_attribute_space(ac.get_attribute_min());
    float max_tick = ac.tick_space_from_attribute_space(ac.get_attribute_max());
    int min_i = (int)ceil(min_tick / tc.step - std::numeric_limits<float>::epsilon());
    int max_i = (int)((max_tick - fmod(max_tick, tc.step)) / tc.step);
    // ignore secondary ticks on domain boundary
    if (ti == 1 && min_i * tc.step - min_tick < std::numeric_limits<float>::epsilon())
        ++min_i;
    if (ti == 1 && max_i * tc.step - max_tick > -std::numeric_limits<float>::epsilon())
        --max_i;
    float lw = 0.5f * get_domain_config_ptr()->reference_size * tc.line_width;
    float dl = 0.5f * get_domain_config_ptr()->reference_size * tc.length;
    float d = -int(ti + 3) * layer_depth;
    for (int i = min_i; i <= max_i; ++i) {
        float c_tick = (float)(i * tc.step);
        float c_attr = ac.attribute_space_from_tick_space(c_tick);
        // ignore secondary ticks on axes
        if (fabs(c_attr) < std::numeric_limits<float>::epsilon())
            continue;
        // ignore secondary ticks on primary ticks
        if (ti == 1 && fabs(fmod(c_tick, ac.primary_ticks.step)) < 0.00001f)
            continue;
        std::string label_str;
        if (tc.label)
            label_str = cgv::utils::to_string(c_attr);
        float c_plot = ac.plot_space_from_window_space(ac.window_space_from_tick_space(c_tick));
        vec2 mn, mx;
        mn[ai] = c_plot - lw;
        mx[ai] = c_plot + lw;
        switch (tc.type) {
        case TT_DASH:
            mn[1 - ai] = -he;
            mx[1 - ai] = -he + dl;
            R.push_back(box2(mn, mx));
            C.push_back(ac.color);
            D.push_back(d);
            if (!label_str.empty()) {
                mx[1 - ai] += acw;
                tick_labels.push_back(label_info(mx.to_vec(), label_str, ai == 0 ? cgv::render::TA_BOTTOM : cgv::render::TA_LEFT));
                if (ti == 1)
                    tick_labels.back().scale = 0.75f;
            }
            mn[1 - ai] = he - dl;
            mx[1 - ai] = he;
            R.push_back(box2(mn, mx));
            C.push_back(ac.color);
            D.push_back(d);
            if (!label_str.empty()) {
                mn[1 - ai] -= acw;
                tick_labels.push_back(label_info(mn.to_vec(), label_str, ai == 0 ? cgv::render::TA_TOP : cgv::render::TA_RIGHT));
                if (ti == 1)
                    tick_labels.back().scale = 0.75f;
            }
            if (z_plot != std::numeric_limits<float>::quiet_NaN()) {
                mn[1 - ai] = z_plot - dl;
                mx[1 - ai] = z_plot + dl;
                R.push_back(box2(mn, mx));
                C.push_back(ac.color);
                D.push_back(d);
            }
            break;
        case TT_LINE:
        case TT_PLANE:
            mn[1 - ai] = -he;
            mx[1 - ai] = he;
            R.push_back(box2(mn, mx));
            C.push_back(ac.color);
            D.push_back(d);
            if (!label_str.empty()) {
                mn[1 - ai] += acw;
                mx[1 - ai] -= acw;
                mn[ai] += 2.5f * lw;
                mx[ai] += 2.5f * lw;
                tick_labels.push_back(label_info(mx.to_vec(), label_str, cgv::render::TextAlignment(ai == 0 ? cgv::render::TA_TOP + cgv::render::TA_LEFT : cgv::render::TA_RIGHT + cgv::render::TA_BOTTOM)));
                if (ti == 1)
                    tick_labels.back().scale = 0.75f;
                tick_labels.push_back(label_info(mn.to_vec(), label_str, cgv::render::TextAlignment(ai == 0 ? cgv::render::TA_BOTTOM + cgv::render::TA_LEFT : cgv::render::TA_LEFT + cgv::render::TA_BOTTOM)));
                if (ti == 1)
                    tick_labels.back().scale = 0.75f;
            }
            break;
        }
    }
    return true;
}
*/
 
void plot2d::extract_domain_tick_rectangles_and_tick_labels(
    std::vector<box2>& R, std::vector<rgb>& C, std::vector<float>& D,
    std::vector<label_info>& tick_labels, std::vector<tick_batch_info>& tick_batches)
{
    vecn E = get_extent();
    set_extent(vecn(2, &extent[0]));
    tick_labels.clear();
    tick_batches.clear();
    for (unsigned ti = 0; ti < 2; ++ti) {
        for (unsigned ai = 0; ai < 2; ++ai) {
            axis_config& ac = get_domain_config_ptr()->axis_configs[ai];
            axis_config& ao = get_domain_config_ptr()->axis_configs[1 - ai];
            float z_plot = (ao.get_attribute_min() < 0.0f && ao.get_attribute_max() > 0.0f) ?
                ao.plot_space_from_attribute_space(0.0f) : std::numeric_limits<float>::quiet_NaN();
            tick_batch_info tbi(ai, 1 - ai, ti == 0, 0, (unsigned)tick_labels.size());
            if (extract_tick_rectangles_and_tick_labels(R, C, D, tick_labels, ai, ai, ti, 0.5f * ao.extent, z_plot, 1.0f, vec2(0.0f), -3 * layer_depth, ac.multi_axis_ticks)) {
                if ((tbi.label_count = (unsigned)(tick_labels.size() - tbi.first_label)) > 0)
                    tick_batches.push_back(tbi);
            }
        }
    }
    set_extent(E);
}
 
void plot2d::draw_domain(cgv::render::context& ctx, int si, bool no_fill)
{
    std::vector<box2> R;
    std::vector<rgb> C;
    std::vector<float> D;
    extract_domain_rectangles(R, C, D);
    extract_domain_tick_rectangles_and_tick_labels(R, C, D, tick_labels, tick_batches);
    draw_rectangles(ctx, aam_domain, R, C, D, (get_domain_config_ptr()->fill && !no_fill) ? 0 : 1);
    draw_title(ctx, vec2::from_vec(get_domain_config_ptr()->title_pos), -3 * layer_depth, si);
    draw_tick_labels(ctx, aam_domain_tick_labels, tick_labels, tick_batches, -4 * layer_depth);
}
 
void plot2d::draw(cgv::render::context& ctx)
{
    prepare_extents();
 
    ctx.push_blend_state();
    ctx.enable_blending();
    ctx.set_blend_func_back_to_front();
    ctx.push_cull_state();
    ctx.set_cull_state(cgv::render::CM_OFF);
    ctx.push_depth_test_state();
    ctx.set_depth_func(cgv::render::CF_LEQUAL);
    ctx.push_buffer_mask();
 
    // place plot with modelview matrix
    ctx.push_modelview_matrix();
    mat4 R;
    orientation.put_homogeneous_matrix(R);
    ctx.mul_modelview_matrix(cgv::math::translate4<float>(center_location) * R);
 
    // configure bar prog only once
    configure_bar_plot(ctx);
    // draw all subplots jointly in one plane
    if (sub_plot_delta[2] == 0.0f) {
        if (get_domain_config_ptr()->show_domain)
            draw_domain(ctx);
        if (legend_components != LC_HIDDEN)
            draw_legend(ctx, 5);
        if (disable_depth_mask)
            ctx.set_depth_mask(false);
        else
            ctx.set_depth_func(cgv::render::CF_LEQUAL);
        draw_sub_plots_jointly(ctx, 8);
        if (disable_depth_mask)
            ctx.set_depth_mask(true);
        else
            ctx.set_depth_func(cgv::render::CF_LESS);
    }
    // draw subplots with offset in back to front order
    else {
        auto M = ctx.get_modelview_matrix();
        double plot_pos_eye_z = M(2, 3);
        double plot_z_eye_z = M(2, 2);
        int i_begin = 0, i_end = get_nr_sub_plots(), i_delta = 1;
        // check if we can not use default order
        if (plot_pos_eye_z * plot_z_eye_z * sub_plot_delta[2] > 0) {
            i_begin = i_end - 1;
            i_end = -1;
            i_delta = -1;
            ctx.mul_modelview_matrix(cgv::math::translate4<float>(vec3(0, 0, (get_nr_sub_plots()-1) * sub_plot_delta[2])));
        }
        // traverse all subplots in back to front order
        bool fst = true;
        unsigned ai;
        for (ai=0; ai<2+nr_attributes; ++ai)
            if (multi_axis_modes[ai])
                get_domain_config_ptr()->axis_configs[ai].backup_attribute_range();
        for (int i = i_begin; i != i_end; i += i_delta) {
            // adapt all axes in multi axis mode
            for (ai = 0; ai < 2 + nr_attributes; ++ai) {
                if (multi_axis_modes[ai]) {
                    auto& ac = get_domain_config_ptr()->axis_configs[ai];
                    float min_val, max_val;
                    ac.put_backup_attribute_range(min_val, max_val);
                    if (determine_axis_extent_from_subplot(ai, i, min_val, max_val)) {
                        if (fabs(max_val - min_val) < 10.0f * std::numeric_limits<float>::epsilon())
                            max_val = min_val + 1;
                        ac.set_attribute_range(min_val, max_val);
                    }
 
                }
            }
            if (get_domain_config_ptr()->show_domain)
                draw_domain(ctx, i, !fst);
            if (legend_components != LC_HIDDEN)
                draw_legend(ctx, 5, i == i_begin, multi_axis_modes);
            if (disable_depth_mask)
                ctx.set_depth_mask(false);
            else
                ctx.set_depth_func(cgv::render::CF_LEQUAL);
            draw_bar_plot(ctx, i, 8);
            draw_stick_plot(ctx, i, 9);
            draw_line_plot(ctx, i, 10);
            draw_point_plot(ctx, i, 11);
            if (disable_depth_mask)
                ctx.set_depth_mask(true);
            else
                ctx.set_depth_func(cgv::render::CF_LESS);
            ctx.mul_modelview_matrix(cgv::math::translate4<float>(vec3(0, 0, i_delta* sub_plot_delta[2])));
            fst = false;
        }
        for (ai = 0; ai < 2 + nr_attributes; ++ai)
            if (multi_axis_modes[ai])
                get_domain_config_ptr()->axis_configs[ai].restore_attribute_range();
    }
 
    ctx.pop_modelview_matrix();
 
    ctx.pop_blend_state();
    ctx.pop_cull_state();
    ctx.pop_depth_test_state();
    ctx.pop_buffer_mask();
}
 
void plot2d::create_point_config_gui(cgv::base::base* bp, cgv::gui::provider& p, plot_base_config& pbc)
{
    auto& p2dc = reinterpret_cast<plot2d_config&>(pbc);
    plot_base::create_point_config_gui(bp, p, pbc);
}
 
void plot2d::create_stick_config_gui(cgv::base::base* bp, cgv::gui::provider& p, plot_base_config& pbc)
{
    auto& p2dc = reinterpret_cast<plot2d_config&>(pbc);
    plot_base::create_stick_config_gui(bp, p, pbc);
}
 
void plot2d::create_bar_config_gui(cgv::base::base* bp, cgv::gui::provider& p, plot_base_config& pbc)
{
    auto& p2dc = reinterpret_cast<plot2d_config&>(pbc);
    plot_base::create_bar_config_gui(bp, p, pbc);
}
 
void plot2d::create_config_gui(cgv::base::base* bp, cgv::gui::provider& p, unsigned i)
{
    plot_base::create_config_gui(bp, p, i);
}
 
void plot2d::create_gui(cgv::base::base* bp, cgv::gui::provider& p)
{
    if (p.begin_tree_node("Multi Modes", multi_axis_modes, false, "level=3")) {
        p.align("\a");
        for (unsigned ai = 0; ai < 2 + nr_attributes; ++ai)
            p.add_member_control(bp, get_domain_config_ptr()->axis_configs[ai].name, multi_axis_modes[ai], "toggle");
        p.align("\b");
        p.end_tree_node(rrs);
    }
    p.add_member_control(bp, "Delta X", sub_plot_delta[0], "value_slider", "min=-1;max=1;step=0.001;ticks=true");
    p.add_member_control(bp, "Delta Y", sub_plot_delta[1], "value_slider", "min=-1;max=1;step=0.001;ticks=true");
    p.add_member_control(bp, "Delta Z", sub_plot_delta[2], "value_slider", "min=-1;max=1;step=0.02;ticks=true");
    plot_base::create_gui(bp, p);
    p.add_member_control(bp, "Disable Depth Mask", disable_depth_mask, "toggle");
}
 
    }
}