gg/cmd/test/trianlge.go

package main

import "vultras.su/core/gg"
//import "fmt"

var (
	counter int
)

type Tri struct {
	gg.DrawablePolygon
	Spawned bool
}

func NewTri() *Tri {
	ret := &Tri{}
	ret.Transform = gg.T()
	ret.Triangles = gg.Triangles{
		gg.Triangle{
			gg.V(0, 10),
			gg.V(100, 0),
			gg.V(0, -10),
		},
	}
	ret.Color = gg.Rgba(1, 1, 0, 1)
	ret.Visible = true
	ret.Layer = TriangleL
	ret.Connect(player)

	return ret
}

func (t *Tri) Update(c *Context) {
	dt := c.Dt().Seconds()
	if !t.ContainedPoints(gg.Points{c.AbsCursorPosition()}).Empty() {
		t.Color = gg.Rgba(0, 1, 0, 1)
	} else {
		t.Color = gg.Rgba(1, 0, 1, 1)
	}
	if t.Spawned {
		return
	}

	keys := c.Keys()

	d := +1.
	if c.IsPressed(gg.KeyShift) {
		d = -1
	}

	for _, key := range keys { switch key {
	case gg.KeyM:
		absPos := t.Position()
		t.SetPosition(
			absPos.Add(gg.V(0, 100*dt*d)),
		)
	case gg.KeyN:
		absPos := t.Position()
		t.SetPosition(
			absPos.Add(gg.V(100*dt*d, 0)),
		)
	case gg.KeyV:
			t.Rotate(d * gg.Pi * 0.3 * dt)
	case gg.Key2 :
		if t.Spawned {
			break
		}
		t.Triangles = append(t.Triangles, gg.Triangle{
			gg.V(0, 10 + gg.Float(counter)),
			gg.V(100 + gg.Float(counter), 0),
			gg.V(0, -10 - gg.Float(counter)),
		})
	case gg.Key3 :
		if t.Spawned {
			break
		}
		tt := *t
		tt.Spawned = true
		tt.Disconnect()
		if c.Spawn(&tt) == nil {
			counter++
		}
	}}

	for _, event := range c.Events {
	switch e := event.(type) { case *gg.KeyDown:
		switch e.Key {
		case gg.Key1 :
			if t.Connected() {
				t.Disconnect()
			} else {
				t.Connect(player)
			}
	}}}
}