func NewScene(canvas *Canvas) *Scene {
s := Scene{Canvas: canvas,
Res: canvas.Size,
Objs: make([]*Obj, 0, 2),
CameraPos: vec.D(0.0, 0.0, 0.0),
ViewDir: vec.D(0.0, 0.0, 1.0),
RightDir: vec.D(1.0, 0.0, 0.0),
UpDir: vec.D(0.0, 1.0, 0.0),
Fov: 90,
Bg: vec.C(0.0, 0.0, 0.5)}
height := 2.0 * math.Tan(s.Fov/2.0)
s.ViewPlane = vec.D2( // viewplane at distance 1.0
(height*float64(s.Res.X))/float64(s.Res.Y),
height)
return &s
}
func (p *parser) addV(args []string) {
if len(args) != 3 {
fmt.Print("invalid vertex", args)
return
}
x, _ := strconv.ParseFloat(args[0], 64)
y, _ := strconv.ParseFloat(args[1], 64)
z, _ := strconv.ParseFloat(args[2], 64)
//TODO check errors
v := vec.D(x, y, z)
p.numVerts++
p.verts[p.numVerts] = v
if debug {
fmt.Println("vertex", p.numVerts, v)
}
}