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Add 3D line painting

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This commit is contained in:
Nikita Lisitsa 2020-09-27 19:40:22 +03:00
parent dbc429eaa7
commit e73da04a31
2 changed files with 22 additions and 0 deletions
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1
libs/gfx/include/psemek/gfx/painter.hpp
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@ -60,6 +60,7 @@ namespace psemek::gfx
// 3D
void axes(geom::point<float, 3> const & p, float length, float width);
void sphere(geom::point<float, 3> const & p, float radius, color const & c, int quality = 6);
void line3d(geom::point<float, 3> const & p0, geom::point<float, 3> const & p1, float width, color const & c);
void text3d(geom::point<float, 3> const & p, std::string_view str, text_options const & opts, geom::matrix<float, 3, 3> const & transform);
// Should be called on each frame

21
libs/gfx/source/painter.cpp
View file

@ -356,6 +356,27 @@ namespace psemek::gfx
}
}
void painter::line3d(geom::point<float, 3> const & p0, geom::point<float, 3> const & p1, float width, color const & c)
{
std::uint32_t const base = impl().vertices.size();
float const r = width / 2.f;
auto const d = geom::normalized(p1 - p0);
geom::vector<float, 3> const o { -d[1], d[0], 0.f };
impl().vertices.push_back({{p0[0] + r * o[0], p0[1] + r * o[1], p0[2]}, c});
impl().vertices.push_back({{p0[0] - r * o[0], p0[1] - r * o[1], p0[2]}, c});
impl().vertices.push_back({{p1[0] + r * o[0], p1[1] + r * o[1], p1[2]}, c});
impl().vertices.push_back({{p1[0] - r * o[0], p1[1] - r * o[1], p1[2]}, c});
impl().indices.push_back(base + 0);
impl().indices.push_back(base + 1);
impl().indices.push_back(base + 3);
impl().indices.push_back(base + 0);
impl().indices.push_back(base + 3);
impl().indices.push_back(base + 2);
}
void painter::text3d(geom::point<float, 3> const & p, std::string_view str, text_options const & opts, geom::matrix<float, 3, 3> const & t)
{
auto const size = text_size(str, opts.f, opts.scale);