func (polyline *polyLine) render(coords []float32) {
var sleeve, current, next mgl32.Vec2
polyline.vertices = []mgl32.Vec2{}
polyline.normals = []mgl32.Vec2{}
coords_count := len(coords)
is_looping := (coords[0] == coords[coords_count-2]) && (coords[1] == coords[coords_count-1])
if !is_looping { // virtual starting point at second point mirrored on first point
sleeve = mgl32.Vec2{coords[2] - coords[0], coords[3] - coords[1]}
} else { // virtual starting point at last vertex
sleeve = mgl32.Vec2{coords[0] - coords[coords_count-4], coords[1] - coords[coords_count-3]}
}
for i := 0; i+3 < coords_count; i += 2 {
current = mgl32.Vec2{coords[i], coords[i+1]}
next = mgl32.Vec2{coords[i+2], coords[i+3]}
polyline.renderEdge(sleeve, current, next)
sleeve = next.Sub(current)
}
if is_looping {
polyline.renderEdge(sleeve, next, mgl32.Vec2{coords[2], coords[3]})
} else {
polyline.renderEdge(sleeve, next, next.Add(sleeve))
}
if polyline.join == LINE_JOIN_NONE {
polyline.vertices = polyline.vertices[2 : len(polyline.vertices)-2]
}
polyline.draw(is_looping)
}
func (ai *AI) getPseudoMe() *agario.Cell {
firstCell := ai.OwnCells[0]
me := &agario.Cell{
ID: firstCell.ID,
Name: firstCell.Name,
Heading: firstCell.Heading,
Color: firstCell.Color,
IsVirus: firstCell.IsVirus,
}
var avgPosition mgl32.Vec2
for _, cell := range ai.OwnCells {
me.Size += cell.Size
if avgPosition.X() == 0 && avgPosition.Y() == 0 {
avgPosition = cell.Position
continue
}
avgPosition = avgPosition.Add(cell.Position)
}
n := float32(len(ai.OwnCells))
avgPosition[0] = avgPosition[0] / n
avgPosition[1] = avgPosition[1] / n
me.Position = avgPosition
return me
}
func tween(a, b mgl32.Vec2) (x, y float32) {
v := b.Sub(a)
v = v.Mul(0.5)
v = a.Add(v)
return v.Elem()
}
func computeMiter(lineA, lineB mgl32.Vec2, halfThick float32) (miter mgl32.Vec2, length float32) {
var (
tangent mgl32.Vec2
tmp mgl32.Vec2
)
tangent = lineA.Add(lineB).Normalize()
miter = mgl32.Vec2{-tangent[1], tangent[0]}
tmp = mgl32.Vec2{-lineA[1], lineA[0]}
length = halfThick / miter.Dot(tmp)
return
}
func makeTriangle(n mesh.Number, d float32, o mgl32.Vec2) mesh.Mesh {
return mesh.Mesh{
Nmbr: n,
Dpth: d,
Vrts: []mgl32.Vec2{
o.Add(mgl32.Vec2{0, 0}),
o.Add(mgl32.Vec2{0, 100}),
o.Add(mgl32.Vec2{100, 100}),
},
Clrs: []mgl32.Vec4{
{0.7, 1.0, 0.0, 0.7},
},
Trngls: []mesh.Triangle{
{Vnd: mesh.Nd{0, 1, 2}},
},
}
}
func (polyline *polyLine) generateEdges(current mgl32.Vec2, count int) {
normal_count := len(polyline.normals)
for i := count; i > 0; i-- {
polyline.vertices = append(polyline.vertices, current.Add(polyline.normals[normal_count-i]))
}
}