func majicParticles() *effects.ParticleGroup {
img, _ := assets.ImportImageCached("resources/majic.png")
material := renderer.NewMaterial(renderer.NewTexture("diffuseMap", img, false))
particleSystem := effects.CreateParticleSystem(effects.ParticleSettings{
MaxParticles: 300,
ParticleEmitRate: 700,
BaseGeometry: renderer.CreateBox(float32(1), float32(1)),
TotalFrames: 9,
FramesX: 3,
FramesY: 3,
MaxLife: 1.3,
MinLife: 0.7,
StartColor: color.NRGBA{254, 254, 254, 254},
EndColor: color.NRGBA{254, 254, 254, 254},
StartSize: mgl32.Vec2{10, 10}.Vec3(0),
EndSize: mgl32.Vec2{10, 10}.Vec3(0),
MinTranslation: mgl32.Vec2{-1, -1}.Vec3(0),
MaxTranslation: mgl32.Vec2{1, 1}.Vec3(0),
MinStartVelocity: mgl32.Vec2{-170, -170}.Vec3(0),
MaxStartVelocity: mgl32.Vec2{170, 170}.Vec3(0),
MaxRotation: -3.14,
MinRotation: 3.14,
})
particleSystem.FaceCamera = false
particleGroup := effects.NewParticleGroup(nil, particleSystem)
particleGroup.Node.Material = material
return particleGroup
}
func sparkParticles() *effects.ParticleGroup {
img, _ := assets.ImportImageCached("resources/spark.png")
material := renderer.NewMaterial(renderer.NewTexture("diffuseMap", img, false))
particleSystem := effects.CreateParticleSystem(effects.ParticleSettings{
MaxParticles: 80,
ParticleEmitRate: 400,
BaseGeometry: renderer.CreateBox(float32(1), float32(1)),
TotalFrames: 1,
FramesX: 1,
FramesY: 1,
MaxLife: 3.3,
MinLife: 1.7,
StartColor: color.NRGBA{254, 160, 90, 254},
EndColor: color.NRGBA{254, 160, 90, 254},
StartSize: mgl32.Vec2{2, 2}.Vec3(0),
EndSize: mgl32.Vec2{2, 2}.Vec3(0),
MinTranslation: mgl32.Vec2{-5, -5}.Vec3(0),
MaxTranslation: mgl32.Vec2{5, 5}.Vec3(0),
MinStartVelocity: mgl32.Vec2{-100, -100}.Vec3(0),
MaxStartVelocity: mgl32.Vec2{100, 100}.Vec3(0),
Acceleration: mgl32.Vec2{0, 400}.Vec3(0),
OnParticleUpdate: func(p *effects.Particle) {
p.Scale[0] = p.Scale[0] * (1 + p.Velocity.Len()*0.05)
p.Orientation = mgl32.QuatBetweenVectors(mgl32.Vec3{1, 0, 0}, p.Velocity)
},
})
particleSystem.FaceCamera = false
particleGroup := effects.NewParticleGroup(nil, particleSystem)
particleGroup.Node.Material = material
return particleGroup
}
func dustParticles() *effects.ParticleGroup {
img, _ := assets.ImportImageCached("resources/smoke.png")
material := renderer.NewMaterial(renderer.NewTexture("diffuseMap", img, false))
particleSystem := effects.CreateParticleSystem(effects.ParticleSettings{
MaxParticles: 5,
ParticleEmitRate: 20,
BaseGeometry: renderer.CreateBox(float32(1), float32(1)),
TotalFrames: 64,
FramesX: 8,
FramesY: 8,
MaxLife: 3.3,
MinLife: 2.7,
StartColor: color.NRGBA{254, 254, 254, 120},
EndColor: color.NRGBA{254, 254, 254, 0},
StartSize: mgl32.Vec2{40, 40}.Vec3(0),
EndSize: mgl32.Vec2{180, 180}.Vec3(0),
MinTranslation: mgl32.Vec2{-2, -2}.Vec3(0),
MaxTranslation: mgl32.Vec2{2, 2}.Vec3(0),
MinStartVelocity: mgl32.Vec2{-5.0, -5.0}.Vec3(0),
MaxStartVelocity: mgl32.Vec2{5.0, 5.0}.Vec3(0),
MaxRotation: -3.14,
MinRotation: 3.14,
})
particleSystem.FaceCamera = false
particleGroup := effects.NewParticleGroup(nil, particleSystem)
particleGroup.Node.Material = material
return particleGroup
}
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}
}))
}
}