// cm, collision motion, shows how controlling a physics body works by applying
// velocity pushes instead of updating the body's location. It also demonstrates
// how collisions with another physics body can affect camera/player movement.
func cm() {
cm := &cmtag{}
var err error
if cm.eng, err = vu.New("Collision Motion", 400, 100, 800, 600); err != nil {
log.Printf("co: error intitializing engine %s", err)
return
}
cm.eng.SetDirector(cm)
defer cm.eng.Shutdown()
cm.eng.Action()
}
// sg tests the scene graph by building up a movable character that has multiple
// layers of sub-parts. The scene graph works when changing the top level location,
// orientation, and scale also affects the subparts. Sg also tests adding and removing
// parts from a scene graph. The main classes being tested are vu.Scene and vu.Part, eg:
// scene.AddPart()
// scene.RemPart(sg.tr.part)
//
// Note that the movement keys move the character and not the camera in this example.
func sg() {
sg := &sgtag{}
var err error
if sg.eng, err = vu.New("Scene Graph", 400, 100, 800, 600); err != nil {
log.Printf("sg: error intitializing engine %s", err)
return
}
sg.run = 10 // move so many cubes worth in one second.
sg.spin = 270 // spin so many degrees in one second.
sg.eng.SetDirector(sg) // override user input handling.
defer sg.eng.Shutdown()
sg.eng.Action()
}
// bb tests the engines handling of textures, billboarding and banners.
// This example is used to see what type of effects can be generated
// using simple textures.
func bb() {
bb := &bbtag{}
var err error
if bb.eng, err = vu.New("Billboarding & Banners", 400, 100, 800, 600); err != nil {
log.Printf("bb: error intitializing engine %s", err)
return
}
bb.run = 10 // move so many cubes worth in one second.
bb.spin = 270 // spin so many degrees in one second.
bb.eng.SetDirector(bb) // override user input handling.
defer bb.eng.Shutdown()
bb.eng.Action()
}
// rl tests higher level graphics functionality. This includes:
// vu culling/reducing the total objects rendered based on distance. See:
// flr.plan.SetVisibleRadius(10)
// flr.plan.SetVisibleDirection(true)
// vu 2D overlay scene, in this case a minimap. See:
// flr.mmap = rl.eng.AddScene(vu.XZtoXY)
// flr.mmap.Set2D()
// flr.mmap.SetOrthographic(-0.2, 100, -0.2, 75, 0, 10)
// vu grid generation. See:
// &grid.Dense{},
// &grid.Sparse{},
// &grid.Rooms{},
//
// rl also tests camera movement that includes holding multiple movement keys
// at the same time. The example does not have collision detection so you can
// literally run through the maze.
func rl() {
rl := &rltag{}
var err error
if rl.eng, err = vu.New("Random Levels", 400, 100, 800, 600); err != nil {
log.Printf("rl: error intitializing engine %s", err)
return
}
rl.run = 5 // move so many cubes worth in one second.
rl.spin = 270 // spin so many degrees in one second.
rl.eng.SetDirector(rl) // override user input handling.
defer rl.eng.Shutdown()
rl.eng.Action()
}
// cr, collision resolution, demonstrates simulated physics by having balls bounce
// on a floor. The neat thing is that after the initial locations have been set
// the physics simulation (vu/move) handles all subsequent position updates.
func cr() {
cr := &crtag{}
var err error
if cr.eng, err = vu.New("Collision Resolution", 400, 100, 800, 600); err != nil {
log.Printf("cr: error intitializing engine %s", err)
return
}
cr.run = 10 // move so many cubes worth in one second.
cr.spin = 270 // spin so many degrees in one second.
cr.eng.SetDirector(cr) // override user input handling.
defer cr.eng.Shutdown()
cr.eng.Action()
}