func NewCar(owner *Player, spriteFG, spriteBG *Sprite, carSize float32, font *ttf.Font) *Car {
textNick := ttf.RenderUTF8_Blended(font, owner.Nick, sdl.Color{255, 255, 255, 0})
spriteNick := NewSpriteFromSurface(textNick)
return &Car{
position: Vector{0, 0},
velocity: Vector{0, 0},
maxVelocity: 100,
zLevel: 0,
layer: 0,
owner: owner,
force: Vector{0, 0},
torque: 0,
angularVelocity: 0,
angle: 0,
mass: 5,
inertia: 200,
wheels: [2]*Wheel{
NewWheel(Vector{0, carSize / 2.0}, 4),
NewWheel(Vector{0, -carSize / 2.0}, 4),
},
spriteFG: spriteFG,
spriteBG: spriteBG,
size: carSize,
width: carSize * 18 / 32.0,
height: carSize * 1,
spriteNick: spriteNick,
}
}
func NewRacer(levelDir string) (*Racer, error) {
r := &Racer{cars: make([]*Car, 0)}
var err error
if r.obstaclemap, err = LoadImageGray(filepath.Join(levelDir, "velocity.png")); err != nil {
return nil, err
}
if r.heightmap, err = LoadImageGray(filepath.Join(levelDir, "z.png")); err != nil {
return nil, err
}
carSize := 0.02 * float32(screenWidth)
if r.spriteCarFG, err = NewSprite("data/cars/car1/fg.png", carSize, carSize); err != nil {
return nil, err
}
if r.spriteCarBG, err = NewSprite("data/cars/car1/bg.png", carSize, carSize); err != nil {
return nil, err
}
r.carSize = carSize
if r.spriteForeground, err = NewSprite(filepath.Join(levelDir, "foreground.png"), screenWidth, screenHeight); err != nil {
return nil, err
}
if r.spriteBackground, err = NewSprite(filepath.Join(levelDir, "background.png"), screenWidth, screenHeight); err != nil {
return nil, err
}
if r.music = mixer.LoadMUS("data/music.ogg"); r.music == nil {
return nil, errors.New(sdl.GetError())
}
if r.font = ttf.OpenFont("data/font.otf", 32); r.font == nil {
return nil, errors.New(sdl.GetError())
}
textWaiting := ttf.RenderUTF8_Blended(r.font, "Waiting for other players. Press space to start....", sdl.Color{0, 0, 255, 0})
r.spriteWaiting = NewSpriteFromSurface(textWaiting)
return r, nil
}
func (renderer *SDLRenderer) renderLine(pos int, line string) {
x := renderer.commandLineRect.X
y := int16(renderer.commandLineRect.Y) - int16(renderer.fontHeight*uint(pos))
w := renderer.commandLineRect.W
h := renderer.commandLineRect.H
renderer.internalSurface.FillRect(&sdl.Rect{x, y, w, h}, 0)
if len(line) == 0 {
return
}
var textSurface *sdl.Surface
if renderer.Blended {
textSurface = ttf.RenderUTF8_Blended(renderer.Font, line, renderer.Color)
} else {
textSurface = ttf.RenderUTF8_Solid(renderer.Font, line, renderer.Color)
}
if textSurface != nil {
renderer.internalSurface.Blit(&sdl.Rect{x, y, w, h}, textSurface, nil)
textSurface.Free()
}
}