gg/ox/polygon.go

package ox

import (
	"surdeus.su/core/gg"
	"surdeus.su/core/gg/mx"
)

// Grouped triangles type.
type Polygon struct {
	ObjectImpl
	Transform
	mx.Triangles
}

func (p Polygon) ContainedPoints(pts Points) (Points) {
	return p.MakeTriangles().ContainedPoints(pts)
}

func (p Polygon) MakeTriangles() Triangles {
	m := p.Transform.GetMatrice()
	ret := make(Triangles, len(p.Triangles))
	for i, t := range p.Triangles {
		ret[i] = Triangle{
			t[0].Apply(m),
			t[1].Apply(m),
			t[2].Apply(m),
		}
	}
	
	return ret
}

func (p Polygon) GetVertices() mx.Vectors {
	return p.MakeTriangles().GetVertices()
}

func (p Polygon) GetEdges() mx.Lines {
	return p.MakeTriangles().GetEdges()
}

// Polygon that can be drawn.
type DrawablePolygon struct {
	Polygon
	ShaderOptions
	Visibility
	Colority
}

func (p *DrawablePolygon) Draw(c *Context) gg.Drawing {
	ret := gg.Drawing{
		EVertices: (&DrawableTriangles{
			Colority: p.Colority,
			Triangles: p.MakeTriangles(),
		}).MakeEVertices(c),
	}
	return ret
}