74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
|
package plane
|
||
|
|
|
||
|
|
import (
|
||
|
|
"zworld/engine/object"
|
||
|
|
"zworld/engine/object/mesh"
|
||
|
|
"zworld/engine/renderapi/material"
|
||
|
|
"zworld/engine/renderapi/vertex"
|
||
|
|
"zworld/plugins/math/vec2"
|
||
|
|
"zworld/plugins/math/vec3"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Plane struct {
|
||
|
|
object.Object
|
||
|
|
*Mesh
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewObject(args Args) *Plane {
|
||
|
|
return object.New("Plane", &Plane{
|
||
|
|
Mesh: New(args),
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Plane is a single segment, two-sided 3D plane
|
||
|
|
type Mesh struct {
|
||
|
|
*mesh.Static
|
||
|
|
Size object.Property[vec2.T]
|
||
|
|
|
||
|
|
data vertex.MutableMesh[vertex.T, uint16]
|
||
|
|
}
|
||
|
|
|
||
|
|
type Args struct {
|
||
|
|
Size vec2.T
|
||
|
|
Mat *material.Def
|
||
|
|
}
|
||
|
|
|
||
|
|
func New(args Args) *Mesh {
|
||
|
|
if args.Mat == nil {
|
||
|
|
args.Mat = material.StandardForward()
|
||
|
|
}
|
||
|
|
p := object.NewComponent(&Mesh{
|
||
|
|
Static: mesh.New(args.Mat),
|
||
|
|
Size: object.NewProperty[vec2.T](args.Size),
|
||
|
|
})
|
||
|
|
p.data = vertex.NewTriangles[vertex.T, uint16](object.Key("plane", p), nil, nil)
|
||
|
|
p.Size.OnChange.Subscribe(func(f vec2.T) { p.refresh() })
|
||
|
|
p.refresh()
|
||
|
|
return p
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *Mesh) refresh() {
|
||
|
|
s := p.Size.Get().Scaled(0.5)
|
||
|
|
y := float32(0.001)
|
||
|
|
|
||
|
|
vertices := []vertex.T{
|
||
|
|
{P: vec3.New(-s.X, y, -s.Y), N: vec3.UnitY, T: vec2.New(0, 1)}, // o1
|
||
|
|
{P: vec3.New(s.X, y, -s.Y), N: vec3.UnitY, T: vec2.New(1, 1)}, // x1
|
||
|
|
{P: vec3.New(-s.X, y, s.Y), N: vec3.UnitY, T: vec2.New(0, 0)}, // z1
|
||
|
|
{P: vec3.New(s.X, y, s.Y), N: vec3.UnitY, T: vec2.New(1, 0)}, // d1
|
||
|
|
|
||
|
|
{P: vec3.New(-s.X, -y, -s.Y), N: vec3.UnitYN, T: vec2.New(0, 0)}, // o2
|
||
|
|
{P: vec3.New(s.X, -y, -s.Y), N: vec3.UnitYN, T: vec2.New(0, 0)}, // x2
|
||
|
|
{P: vec3.New(-s.X, -y, s.Y), N: vec3.UnitYN, T: vec2.New(0, 0)}, // z2
|
||
|
|
{P: vec3.New(s.X, -y, s.Y), N: vec3.UnitYN, T: vec2.New(0, 0)}, // d2
|
||
|
|
}
|
||
|
|
|
||
|
|
indices := []uint16{
|
||
|
|
0, 2, 1, 1, 2, 3, // top
|
||
|
|
5, 6, 4, 7, 6, 5, // bottom
|
||
|
|
}
|
||
|
|
|
||
|
|
p.data.Update(vertices, indices)
|
||
|
|
p.VertexData.Set(p.data)
|
||
|
|
}
|