gg/ox/tri.go

package ox

import "surdeus.su/core/gg/mx"
import "surdeus.su/core/gg"
//import "github.com/hajimehoshi/ebiten/v2"

type DrawableTriangles struct {
	mx.Triangles

	Drawity
}

func (r *DrawableTriangles) MakeVertices(
	c gg.Context,
) gg.Vertices {
	m := c.Camera().GetRealMatrice(c)
	vs := make(gg.Vertices, len(r.Triangles) * 3)
	var buf gg.Vertice
	buf.Color = r.Color
	for i := range r.Triangles {
		for j := range r.Triangles[i] {
			buf.Dst = r.Triangles[i][j].Apply(m)
			vs[i*3 + j] = buf
		}
	}
	return vs
}

func (r *DrawableTriangles) Draw(
	c gg.Context,
) *gg.Drawing {
	return &gg.Drawing{
		Vertices: r.MakeVertices(c),
	}
}