func newBox(width, height float32) *box {
var err error
box := new(box)
// Sound player
box.player, err = mandala.NewAudioPlayer()
if err != nil {
mandala.Fatalf("%s\n", err.Error())
}
// Chipmunk body
box.physicsShape = chipmunk.NewBox(
vect.Vect{0, 0},
vect.Float(width),
vect.Float(height),
)
box.physicsShape.SetElasticity(BoxElasticity)
box.physicsBody = chipmunk.NewBody(vect.Float(BoxMass), box.physicsShape.Moment(float32(BoxMass)))
box.physicsBody.AddShape(box.physicsShape)
box.physicsBody.CallbackHandler = callbacks{}
// OpenGL shape
box.openglShape = shapes.NewBox(width, height)
return box
}
func addRoom(pos vect.Vect, w vect.Float, h vect.Float) {
box := chipmunk.NewBox(vect.Vector_Zero, w+0.5, h+0.5)
box.SetElasticity(0.5)
body := chipmunk.NewBody(1.0, box.Moment(float32(1.0)))
body.SetPosition(pos)
body.AddShape(box)
room := Room{
Color: mgl32.Vec4{.3, .3, 1, .2},
Box: box,
}
rooms = append(rooms, &room)
}
// add a pipe box to the space
func addOnePipeBox(pos vect.Vect) {
pipeBox := chipmunk.NewBox(vect.Vector_Zero, vect.Float(pipeSide), vect.Float(pipeSide))
pipeBox.SetElasticity(0.6)
body := chipmunk.NewBody(chipmunk.Inf, chipmunk.Inf)
body.SetPosition(pos)
body.SetVelocity(pipeVelX, pipeVelY)
body.IgnoreGravity = true
body.AddShape(pipeBox)
space.AddBody(body)
pipe = append(pipe, pipeBox)
}
func NewPhysics(static bool) *Physics {
var body *chipmunk.Body
box := chipmunk.NewBox(vect.Vect{0, 0}, vect.Float(1), vect.Float(1))
if static {
body = chipmunk.NewBodyStatic()
} else {
body = chipmunk.NewBody(1, box.Moment(1))
}
p := &Physics{BaseComponent: NewComponent(), Body: body, Box: box.GetAsBox(), Shape: box}
body.AddShape(box)
return p
}
func addFlappy() {
flappyBird := chipmunk.NewBox(vect.Vector_Zero, vect.Float(pipeSide), vect.Float(pipeSide))
flappyBird.SetElasticity(0.95)
body := chipmunk.NewBody(vect.Float(flappyMass), vect.Float(flappyMoment))
body.SetPosition(vect.Vect{100, vect.Float(winHeight)})
body.SetAngularVelocity(float32(10 * deg2rad))
// hook collision events
handlers := collisionHandlers{}
body.CallbackHandler = handlers
body.AddShape(flappyBird)
space.AddBody(body)
flappyBirds = append(flappyBirds, flappyBird)
}
func newBox(world *World, width, height float32) *Box {
box := new(Box)
// Chipmunk body
box.physicsShape = chipmunk.NewBox(
vect.Vect{0, 0},
vect.Float(width),
vect.Float(height),
)
box.physicsShape.SetElasticity(BoxElasticity)
box.physicsBody = chipmunk.NewBody(vect.Float(BoxMass), box.physicsShape.Moment(float32(BoxMass)))
box.physicsBody.AddShape(box.physicsShape)
box.physicsBody.CallbackHandler = callbacks{}
// OpenGL shape
box.openglShape = shapes.NewBox(world.boxProgramShader, width, height)
return box
}
func (m *Map) GenerateCollision() {
var shapes []*chipmunk.Shape
for x := 0; x < m.Width; x++ {
for y := 0; y < m.Height; y++ {
if t, e := m.GetTile(x, y); e {
if t.Collision() != CollisionNone {
p, _ := m.GetTilePos(x, y)
shape := chipmunk.NewBox(vect.Vect{vect.Float(p.X), vect.Float(p.Y)},
vect.Float(m.TileSize), vect.Float(m.TileSize))
shape.Layer = chipmunk.Layer(m.Layer)
shape.SetFriction(0)
shapes = append(shapes, shape)
}
}
}
}
m.GameObject().AddComponent(engine.NewPhysicsShapes(true, shapes))
}