virtual void on_draw()
{
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_solid r(rb);
rb.clear(agg::rgba(1, 1, 1));
agg::trans_warp_magnifier lens;
lens.center(g_x1, g_y1);
lens.magnification(m_magn_slider.value());
lens.radius(m_radius_slider.value() / m_magn_slider.value());
agg::conv_segmentator<agg::path_storage> segm(g_path);
agg::trans_affine mtx;
mtx *= agg::trans_affine_translation(-g_base_dx, -g_base_dy);
mtx *= agg::trans_affine_rotation(g_angle + agg::pi);
mtx *= agg::trans_affine_translation(width()/2, height()/2);
agg::conv_transform<
agg::conv_segmentator<
agg::path_storage> > trans_mtx(segm, mtx);
agg::conv_transform<
agg::conv_transform<
agg::conv_segmentator<
agg::path_storage> >, agg::trans_warp_magnifier> trans_lens(trans_mtx, lens);
agg::render_all_paths(g_rasterizer, g_scanline, r, trans_lens, g_colors, g_path_idx, g_npaths);
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_magn_slider);
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_radius_slider);
// Testing inverse_transform()
//--------------------
//double x, y;
//for(y = 0; y < height(); y += 10)
//{
// for(x = 0; x < height(); x += 10)
// {
// double x2 = x+0.5;
// double y2 = y+0.5;
// lens.transform(&x2, &y2);
// lens.inverse_transform(&x2, &y2);
// agg::ellipse e(x2, y2, 1, 1);
// g_rasterizer.add_path(e);
// r.color(agg::rgba8(0,0,0));
// agg::render_scanlines(g_rasterizer, g_scanline, r);
// }
//}
}
virtual void on_draw()
{
typedef agg::renderer_base<agg::pixfmt_bgr24> ren_base;
typedef agg::renderer_scanline_aa_solid<ren_base> renderer;
agg::pixfmt_bgr24 pixf(rbuf_window());
ren_base rb(pixf);
renderer ren(rb);
agg::scanline_u8 sl;
rb.clear(agg::rgba(1,1,1));
agg::rasterizer_scanline_aa<> ras;
agg::render_ctrl(ras, sl, rb, m_slider1);
agg::render_ctrl(ras, sl, rb, m_slider_spiral);
agg::render_ctrl(ras, sl, rb, m_slider_base_y);
typedef agg::conv_segmentator<agg::slider_ctrl<agg::rgba8> > conv_segmentator_type;
typedef agg::conv_transform<conv_segmentator_type, agg::trans_polar> conv_transform_type;
agg::trans_polar trans;
trans.full_circle(-600);
trans.base_scale(-1.0);
trans.base_offset(0.0, m_slider_base_y.value());
trans.translation(width() / 2.0, height() / 2.0 + 30.0);
trans.spiral(-m_slider_spiral.value());
conv_segmentator_type segm(m_slider1);
conv_transform_type pipeline(segm, trans);
agg::transformed_control<agg::rgba8,
agg::slider_ctrl<agg::rgba8>,
conv_transform_type> ctrl(m_slider1, pipeline);
agg::render_ctrl(ras, sl, rb, ctrl);
}
