func NewEngine(r renderer.Renderer) Engine {
fpsMeter := renderer.CreateFPSMeter(1.0)
fpsMeter.FpsCap = 144
sceneGraph := renderer.CreateSceneGraph()
updatableStore := NewUpdatableStore()
camera := renderer.CreateCamera()
engine := &EngineImpl{
fpsMeter: fpsMeter,
sceneGraph: sceneGraph,
updatableStore: updatableStore,
renderer: r,
camera: camera,
}
engine.initNodes()
sceneGraph.Add(engine.opaqueNode)
engine.transparentNode.RendererParams = renderer.NewRendererParams()
engine.transparentNode.RendererParams.CullBackface = false
engine.transparentNode.RendererParams.DepthMask = false
sceneGraph.AddTransparent(engine.transparentNode)
engine.orthoNode.RendererParams = renderer.NewRendererParams()
engine.orthoNode.RendererParams.CullBackface = false
engine.orthoNode.RendererParams.Unlit = true
return engine
}
func (e *Editor) Start() {
glRenderer := opengl.NewOpenglRenderer("GoEngine Editor", 1800, 900, false)
e.renderer = glRenderer
e.gameEngine = engine.NewEngine(e.renderer)
e.gameEngine.Start(func() {
shader, err := assets.ImportShader(
filepath.Join(e.assetDir, "shaders/build/pbr.vert"),
filepath.Join(e.assetDir, "shaders/build/pbr.frag"),
)
if err != nil {
panic("error importing shader")
}
e.gameEngine.DefaultShader(shader)
// Sky cubemap
skyImg, err := assets.ImportImage(filepath.Join(e.assetDir, "resources/cubemap.png"))
if err == nil {
geom := renderer.CreateSkyBox()
geom.Transform(mgl32.Scale3D(10000, 10000, 10000))
skyNode := renderer.NewNode()
skyNode.SetOrientation(mgl32.QuatRotate(1.57, mgl32.Vec3{0, 1, 0}))
skyNode.Material = renderer.NewMaterial(renderer.NewTexture("diffuseMap", skyImg, false))
skyNode.RendererParams = renderer.NewRendererParams()
skyNode.RendererParams.CullBackface = false
skyNode.RendererParams.Unlit = true
skyNode.Add(geom)
e.gameEngine.AddSpatial(skyNode)
// create an environmentMap using the skybox texture
envCubeMap := renderer.NewCubemap("environmentMap", skyImg, true)
e.gameEngine.DefaultCubeMap(envCubeMap)
}
l := renderer.NewLight(renderer.DIRECTIONAL)
l.Color = [3]float32{0.7, 0.7, 0.8}
e.gameEngine.AddLight(l)
//root node
e.gameEngine.AddSpatial(e.rootMapNode)
//input/controller manager
e.controllerManager = glfwController.NewControllerManager(glRenderer.Window)
//camera + player
camera := e.gameEngine.Camera()
freeMoveActor := actor.NewFreeMoveActor(camera)
freeMoveActor.MoveSpeed = 20.0
freeMoveActor.LookSpeed = 0.002
mainController := controller.NewBasicMovementController(freeMoveActor, true)
e.controllerManager.AddController(mainController.(glfwController.Controller))
e.gameEngine.AddUpdatable(freeMoveActor)
e.initSelectSprite()
e.gameEngine.AddUpdatable(engine.UpdatableFunc(e.updateSelectSprite))
//editor controller
e.controllerManager.AddController(NewEditorController(e).(glfwController.Controller))
//custom controller
e.customController = controller.CreateController()
e.controllerManager.AddController(e.customController.(glfwController.Controller))
e.setupUI()
})
}
func setupScene(gameEngine engine.Engine, shader *renderer.Shader) {
camera := gameEngine.Camera()
transparentNode := renderer.NewNode()
gameEngine.AddSpatialTransparent(transparentNode)
transparentNode.RendererParams = &renderer.RendererParams{
DepthTest: true,
Unlit: true,
Transparency: renderer.EMISSIVE,
}
// Sky cubemap
skyImg, err := assets.ImportImage("TestAssets/cloudSky.jpg")
if err == nil {
skyImg = imaging.AdjustBrightness(skyImg, -30)
skyImg = imaging.AdjustContrast(skyImg, 30)
geom := renderer.CreateSkyBox()
geom.Transform(mgl32.Scale3D(10000, 10000, 10000))
skyNode := renderer.NewNode()
skyNode.SetOrientation(mgl32.QuatRotate(1.57, mgl32.Vec3{0, 1, 0}))
skyNode.Material = renderer.NewMaterial(renderer.NewTexture("diffuseMap", skyImg, false))
skyNode.RendererParams = renderer.NewRendererParams()
skyNode.RendererParams.CullBackface = false
skyNode.RendererParams.Unlit = true
skyNode.Add(geom)
gameEngine.AddSpatial(skyNode)
// create an environmentMap using the skybox texture
envCubeMap := renderer.NewCubemap("environmentMap", skyImg, true)
gameEngine.DefaultCubeMap(envCubeMap)
}
// load scene objs
objs := []string{
"TestAssets/wellScene/floor.obj",
"TestAssets/wellScene/frame1.obj",
"TestAssets/wellScene/frame2.obj",
"TestAssets/wellScene/well.obj",
"TestAssets/wellScene/torches.obj",
}
for _, objFile := range objs {
if geom, mat, err := assets.ImportObjCached(objFile); err == nil {
sceneNode := renderer.NewNode()
sceneNode.Add(geom)
sceneNode.Material = mat
sceneNode.RendererParams = renderer.NewRendererParams()
sceneNode.RendererParams.CullBackface = false
gameEngine.AddSpatial(sceneNode)
}
}
for i := 0; i < 2; i++ {
torchLocation := mgl32.Vec3{0.86, 1.76, 1.05}
if i == 1 {
torchLocation = mgl32.Vec3{0.86, 1.76, -1.05}
}
fire := fireParticles()
spark := sparkParticles()
torchParticles := effects.NewParticleGroup(camera, fire, spark)
torchParticles.SetTranslation(torchLocation)
transparentNode.Add(torchParticles)
gameEngine.AddUpdatable(torchParticles)
light := renderer.NewLight(renderer.POINT)
light.SetTranslation(torchLocation.Add(mgl32.Vec3{0, 0.05, 0}))
gameEngine.AddLight(light)
var x float64
gameEngine.AddUpdatable(engine.UpdatableFunc(func(dt float64) {
x += dt
mag := float32(math.Abs(0.6*math.Sin(3*x)+0.3*math.Sin(4*x)+0.15*math.Sin(7*x)+0.1*math.Sin(15*x))) + 0.5
mag *= 0.05
light.Color = [3]float32{1 * mag, 0.6 * mag, 0.4 * mag}
}))
}
}
func main() {
glRenderer := opengl.NewOpenglRenderer("Simple", 800, 800, false)
gameEngine := engine.NewEngine(glRenderer)
gameEngine.InitFpsDial()
gameEngine.Start(func() {
if shader, err := assets.ImportShader("shaders/build/basic.vert", "shaders/build/basic.frag"); err == nil {
gameEngine.DefaultShader(shader)
}
// sky cube
skyImg, err := assets.ImportImage("resources/cubemap.png")
if err == nil {
geom := renderer.CreateSkyBox()
geom.Transform(mgl32.Scale3D(10000, 10000, 10000))
skyNode := renderer.NewNode()
skyNode.SetOrientation(mgl32.QuatRotate(1.57, mgl32.Vec3{0, 1, 0}))
skyNode.Material = renderer.NewMaterial(renderer.NewTexture("diffuseMap", skyImg, false))
skyNode.RendererParams = renderer.NewRendererParams()
skyNode.RendererParams.CullBackface = false
skyNode.RendererParams.Unlit = true
skyNode.Add(geom)
gameEngine.AddSpatial(skyNode)
}
// Add some light to the scene
ambientLight := renderer.NewLight(renderer.AMBIENT)
ambientLight.Color = [3]float32{0.3, 0.3, 0.3}
gameEngine.AddLight(ambientLight)
// Create a red box geometry, attach to a node, add the node to the scenegraph
boxGeometry := renderer.CreateBox(10, 10)
boxGeometry.SetColor(color.NRGBA{254, 0, 0, 254})
boxNode := renderer.NewNode()
boxNode.RendererParams = renderer.NewRendererParams()
boxNode.RendererParams.CullBackface = false
boxNode.Material = renderer.NewMaterial()
boxNode.SetTranslation(mgl32.Vec3{30, 0})
boxNode.Add(boxGeometry)
gameEngine.AddSpatial(boxNode)
// make the box spin
var angle float64
gameEngine.AddUpdatable(engine.UpdatableFunc(func(dt float64) {
angle += dt
q := mgl32.QuatRotate(float32(angle), mgl32.Vec3{0, 1, 0})
boxNode.SetOrientation(q)
}))
// input/controller manager
controllerManager := glfwController.NewControllerManager(glRenderer.Window)
// camera + wasd controls
camera := gameEngine.Camera()
freeMoveActor := actor.NewFreeMoveActor(camera)
freeMoveActor.Location = mgl32.Vec3{}
mainController := controller.NewBasicMovementController(freeMoveActor, false)
controllerManager.AddController(mainController.(glfwController.Controller))
gameEngine.AddUpdatable(freeMoveActor)
//lock the cursor
glRenderer.LockCursor(true)
// custom key bindings
customController := controller.CreateController()
controllerManager.AddController(customController.(glfwController.Controller))
// close window and exit on escape
customController.BindKeyAction(func() {
glRenderer.Window.SetShouldClose(true)
}, controller.KeyEscape, controller.Press)
})
}