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Support drawing multi-color triangles in gfx::painter

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This commit is contained in:
Nikita Lisitsa 2021-06-13 14:14:25 +03:00
parent ed41bc6583
commit ebda20ff9c
2 changed files with 9 additions and 3 deletions
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1
libs/gfx/include/psemek/gfx/painter.hpp
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@ -53,6 +53,7 @@ namespace psemek::gfx
// 2D
void triangle(geom::point<float, 2> const & p0, geom::point<float, 2> const & p1, geom::point<float, 2> const & p2, color const & c);
void triangle(geom::point<float, 2> const & p0, geom::point<float, 2> const & p1, geom::point<float, 2> const & p2, color const & c0, color const & c1, color const & c2);
void rect(geom::box<float, 2> const & box, color const & c);
void circle(geom::point<float, 2> const & center, float radius, color const & c, int quality = 24);
void line(geom::point<float, 2> const & p0, geom::point<float, 2> const & p1, float width, color const & c, bool smooth = true);

11
libs/gfx/source/painter.cpp
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@ -184,12 +184,17 @@ namespace psemek::gfx
painter::~painter() = default;
void painter::triangle(geom::point<float, 2> const & p0, geom::point<float, 2> const & p1, geom::point<float, 2> const & p2, color const & c)
{
triangle(p0, p1, p2, c, c, c);
}
void painter::triangle(geom::point<float, 2> const & p0, geom::point<float, 2> const & p1, geom::point<float, 2> const & p2, color const & c0, color const & c1, color const & c2)
{
std::uint32_t const base = impl().vertices.size();
impl().vertices.push_back({{p0[0], p0[1], 0.f}, c});
impl().vertices.push_back({{p1[0], p1[1], 0.f}, c});
impl().vertices.push_back({{p2[0], p2[1], 0.f}, c});
impl().vertices.push_back({{p0[0], p0[1], 0.f}, c0});
impl().vertices.push_back({{p1[0], p1[1], 0.f}, c1});
impl().vertices.push_back({{p2[0], p2[1], 0.f}, c2});
impl().indices.push_back(base + 0);
impl().indices.push_back(base + 1);