// Blast generates an explosion effect in the game world.
func (f *Fx) Blast(loc space.Location, kind BlastKind) {
switch kind {
case SmallExplosion:
frames := anim.NewCycle(.1e9, false, util.SmallIcons(util.Items, 32, 33, 34, 35))
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
frames.Frame(t).Draw(offset)
}), space.SimpleFootprint(loc), .4e9)
case LargeExplosion:
frames := anim.NewCycle(.10e9, false, util.LargeIcons(util.Items, 5, 6, 7, 8, 9))
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
frames.Frame(t).Draw(offset)
}), space.SimpleFootprint(loc), .5e9)
case Sparks:
frames := anim.NewCycle(.07e9, false, util.SmallIcons(util.Items, 36, 37, 38))
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
frames.Frame(t).Draw(offset)
}), space.SimpleFootprint(loc), .21e9)
case BloodSquib:
frames := anim.NewCycle(.07e9, false, util.SmallIcons(util.Items, 39, 40, 41))
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
frames.Frame(t).Draw(offset)
}), space.SimpleFootprint(loc), .21e9)
case Smoke:
frames := anim.NewCycle(.07e9, false, util.SmallIcons(util.Items, 42, 43, 44))
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
frames.Frame(t).Draw(offset)
}), space.SimpleFootprint(loc), .21e9)
default:
println("Unknown blast kind ", kind)
return
}
}
// Beam generates a projectile beam effect in the game world.
func (f *Fx) Beam(origin space.Location, dir image.Point, length int, kind BeamKind) {
// Make a footprint for the beam shape.
shape := []image.Point{image.Pt(0, 0)}
for i := 0; i < length; i++ {
shape = append(shape, shape[len(shape)-1].Add(dir))
}
footprint := space.FootprintFromPoints(f.world.Manifold, origin, shape)
screenVec := util.ChartToScreen(shape[len(shape)-1])
// TODO: Different beam types.
f.anim.Add(
anim.Func(func(t int64, offset image.Point) {
gfx.Line(
sdl.Frame(),
offset.Add(util.HalfTile),
offset.Add(util.HalfTile).Add(screenVec),
gfx.LerpCol(gfx.Gold, gfx.Black, float64(t)/float64(.5e9)))
}), footprint, .2e9)
}