func CreatePortals() []portal.Portal {
a := portal.Quad{
glm.Vec4d{0, 1, -5, 1},
glm.Vec4d{0, 0, 1, 0},
glm.Vec4d{1, 0, 0, 0},
glm.Vec4d{1, 1, 1, 0},
}
r := glm.HomogRotate3DYd(90)
b := portal.Quad{
glm.Vec4d{-2, 1, 0, 1},
r.Mul4x1(glm.Vec4d{0, 0, 1, 0}),
r.Mul4x1(glm.Vec4d{1, 0, 0, 0}),
glm.Vec4d{1, 1, 1, 0},
}
transform, inverse, pva, pvb := portal.PortalTransform(a, b)
pa := portal.Portal{a, inverse, pva}
pb := portal.Portal{b, transform, pvb}
return []portal.Portal{pa, pb}
}
func (r *Receiver) LoadScene(filename string) {
doc, err := collada.LoadDocument(filename)
panicOnErr(err)
index, err := gtk.NewIndex(doc)
panicOnErr(err)
r.SceneIndex = index
model := gtk.EmptyModel("scene")
switch doc.Asset.UpAxis {
case collada.Xup:
case collada.Yup:
case collada.Zup:
model.Transform = glm.HomogRotate3DXd(-90).Mul4(glm.HomogRotate3DZd(90))
}
portalPattern, _ := regexp.Compile("^Portal_(\\d+)_(\\d+)")
geometryTemplates := make(map[collada.Id][]*gtk.Geometry)
for id, mesh := range r.SceneIndex.Mesh {
geoms := make([]*gtk.Geometry, 0)
for _, pl := range mesh.Polylist {
matches := portalPattern.FindStringSubmatch(mesh.VerticesId)
if matches == nil {
elements := make([]*gtk.DrawElements, 0)
drawElements := gtk.NewDrawElements(pl.TriangleElements, gl.TRIANGLES)
if drawElements != nil {
elements = append(elements, drawElements)
}
geometry := gtk.NewGeometry(string(id), pl.VertexData, pl.NormalData, elements)
geoms = append(geoms, geometry)
} else {
fmt.Println("ignoring Portal")
}
}
if len(geoms) > 0 {
geometryTemplates[id] = geoms
}
}
portalLink := map[int]int{}
portals := map[int]portal.Quad{}
for _, node := range r.SceneIndex.VisualScene.Node {
matches := portalPattern.FindStringSubmatch(node.Name)
transform := r.SceneIndex.Transforms[node.Id]
if matches == nil {
geoms := make([]*gtk.Geometry, 0)
for _, geoinstance := range node.InstanceGeometry {
geoid, _ := geoinstance.Url.Id()
geoms = append(geoms, geometryTemplates[geoid]...)
}
if len(geoms) > 0 {
child := gtk.NewModel(node.Name, []*gtk.Model{}, geoms, transform)
model.AddChild(child)
}
} else {
index, err := strconv.Atoi(matches[1])
if err != nil {
panic(err)
}
exit, err := strconv.Atoi(matches[2])
if err != nil {
panic(err)
}
mt := model.Transform.Mul4(transform)
center := mt.Mul4x1(glm.Vec4d{0, 0, 0, 1})
normal := mt.Mul4x1(glm.Vec4d{0, 0, 1, 0}).Normalize()
planev := mt.Mul4x1(glm.Vec4d{1, 0, 0, 0}).Normalize()
scale := glm.Vec4d{}
n := 0
for i := 0; i < 3; i++ {
sum := 0.0
for j := 0; j < 3; j++ {
sum += float64(mt[n] * mt[n])
n++
}
n++
scale[i] = math.Sqrt(sum)
}
quad := portal.Quad{
center,
normal,
planev,
scale,
}
portalLink[index] = exit
portals[index] = quad
// fmt.Println("portal node", node.Name, quad)
}
}
r.Data.Scene.AddChild(model)
for id, quad := range portals {
exit, ok := portals[portalLink[id]]
if ok {
up := portal.Cross3D(exit.Normal, exit.PlaneV)
// fmt.Println("pre ",exit)
exit = exit.Apply(glm.HomogRotate3Dd(math.Pi, up))
// fmt.Println("post",exit)
_, inverse, pva, _ := portal.PortalTransform(quad, exit)
portal := portal.Portal{quad, inverse, pva}
r.Portals = append(r.Portals, portal)
} else {
fmt.Println("no exit for portal", id, portalLink[id])
}
}
}