// MoveTo moves the shape in x, y position.
func (b *Base) MoveTo(x, y float32) {
b.modelMatrix = mathgl.Translate3D(x, y, 0)
dx := x - b.x
dy := y - b.y
b.x, b.y = x, y
b.bounds = b.bounds.Add(image.Point{int(dx), int(dy)})
}
func NewSwitchModel(sw *Switch) *SwitchModel {
model := &SwitchModel{sw: sw}
vs := []Vertex{NewVertex(0, 0, 0, WhiteColor)}
vv := float64(SwitchSize / 2)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
vs = append(vs, NewVertex(float32(math.Sin(a)*vv), float32(math.Cos(a)*vv), 0, WhiteColor))
}
model.Init(gl.TRIANGLE_FAN, vs, VShaderBasic, FShaderBasic)
v := SwitchSize / 2
model.modelView = mathgl.Ortho2D(0, WindowWidth, WindowHeight, 0).Mul4(mathgl.Translate3D(float32(sw.X+v), float32(sw.Y+v), 0))
return model
}
func (w *World) SetCamera(x, y, z float32) {
// set the view matrix
w.view = mathgl.Translate3D(-x, -y, -z)
}
vs := []Vertex{NewVertex(0, 0, 0, WhiteColor)}
vv := float64(SwitchSize / 2)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
vs = append(vs, NewVertex(float32(math.Sin(a)*vv), float32(math.Cos(a)*vv), 0, WhiteColor))
}
model.Init(gl.TRIANGLE_FAN, vs, VShaderBasic, FShaderBasic)
v := SwitchSize / 2
model.modelView = mathgl.Ortho2D(0, WindowWidth, WindowHeight, 0).Mul4(mathgl.Translate3D(float32(sw.X+v), float32(sw.Y+v), 0))
return model
}
var (
topLeftModelView = mathgl.Translate3D(-BlockSize, -BlockSize, 0)
topRightModelView = mathgl.Translate3D(0, -BlockSize, 0)
bottomRightModelView = mathgl.Ident4f()
bottomLeftModelView = mathgl.Translate3D(-BlockSize, 0, 0)
)
// TODO the switch number
func (t *SwitchModel) Draw() {
modelViewBackup := t.modelView
s := t.sw
var rotatemv mathgl.Mat4f
if s.rotate == 0 {
rotatemv = mathgl.Ident4f()
} else {
rotatemv = mathgl.HomogRotate3D(t.sw.rotate, [3]float32{0, 0, 1})
}
// Move moves the shape by dx, dy.
func (b *Base) Move(dx, dy float32) {
b.modelMatrix = b.modelMatrix.Mul4(mathgl.Translate3D(dx, dy, 0))
b.bounds = b.bounds.Add(image.Point{int(dx), int(dy)})
b.x, b.y = b.x+dx, b.y+dy
}
// Scale scales the shape relative to its center, by the given
// factors.
func (b *Base) Scale(sx, sy float32) {
b.modelMatrix = mathgl.Translate3D(b.x, b.y, 0).Mul4(mathgl.Scale3D(sx, sy, 1.0))
}
// RotateAround rotates the shape around the given point, by the given
// angle in degrees.
func (b *Base) RotateAround(x, y, angle float32) {
dx, dy := x-b.x, y-b.y
b.modelMatrix = mathgl.Translate3D(x, y, 0).Mul4(mathgl.HomogRotate3DZ(angle))
b.modelMatrix = b.modelMatrix.Mul4(mathgl.Translate3D(-dx, -dy, 0))
b.angle = angle
}
// Rotate rotates the shape around its center, by the given angle in
// degrees.
func (b *Base) Rotate(angle float32) {
b.modelMatrix = mathgl.Translate3D(b.x, b.y, 0).Mul4(mathgl.HomogRotate3DZ(angle))
b.angle = angle
}