SPECIALIZED-ARRAY: float
IN: fluids
-STRUCT: float2_t
- { x float }
- { y float } ;
-
-: f2+ ( lhs rhs -- res )
- [ [ x>> ] bi@ + ]
- [ [ y>> ] bi@ + ]
- 2bi float2_t <struct-boa> ; inline
-
-: f2- ( lhs rhs -- res )
- [ [ x>> ] bi@ - ]
- [ [ y>> ] bi@ - ]
- 2bi float2_t <struct-boa> ; inline
-
-: f2*n ( lhs rhs -- res )
- [ [ x>> ] dip * ]
- [ [ y>> ] dip * ]
- 2bi float2_t <struct-boa> ; inline
-
STRUCT: particle_t
- { p float2_t }
- { p' float2_t }
- { m float } ;
+ { p float[2] }
+ { v float[2] }
+ { m float } ;
SPECIALIZED-ARRAY: particle_t
-CONSTANT: gravity S{ float2_t f 0.0 -0.1 }
+CONSTANT: gravity { 0.0 -0.1 }
-:: verlet-integrate-particle ( p dt -- p' )
- p p>> 2.0 f2*n :> v1
- p p'>> :> v2
- gravity dt dt * 1.0 p m>> 2.0 * / * f2*n :> v3
- v1 v2 f2- v3 f2+
- p p m>> particle_t <struct-boa> ; inline
+:: verlet-integrate-particle ( particle dt -- particle' )
+ particle [ p>> ] [ v>> ] bi dt v*n v+
+ gravity dt dt * particle m>> 2 * / v*n v+ :> p'
+ p' particle p>> v- dt v/n :> v'
+ p' v' particle m>> particle_t <struct-boa> ; inline
CONSTANT: initial-particles
particle_t-array{
- S{ particle_t f S{ float2_t f 0.5 0.6 } S{ float2_t f 0.499 0.599 } 1.0 }
- S{ particle_t f S{ float2_t f 0.5 0.6 } S{ float2_t f 0.501 0.599 } 3.0 }
+ S{ particle_t f float-array{ 0.5 0.6 } float-array{ 0 0.1 } 1.0 }
+ S{ particle_t f float-array{ 0.5 0.6 } float-array{ 0.1 0 } 3.0 }
- S{ particle_t f S{ float2_t f 0.5 0.5 } S{ float2_t f 0.5 0.5 } 2.0 }
- S{ particle_t f S{ float2_t f 0.5 0.6 } S{ float2_t f 0.5 0.599 } 1.0 }
- S{ particle_t f S{ float2_t f 0.6 0.5 } S{ float2_t f 0.6 0.5 } 3.0 }
- S{ particle_t f S{ float2_t f 0.7 0.5 } S{ float2_t f 0.7 0.5 } 1.0 }
- S{ particle_t f S{ float2_t f 0.1 0.5 } S{ float2_t f 0.1 0.5 } 5.0 }
- S{ particle_t f S{ float2_t f 0.2 0.5 } S{ float2_t f 0.2 0.5 } 1.0 }
- S{ particle_t f S{ float2_t f 0.3 0.3 } S{ float2_t f 0.3 0.3 } 4.0 }
- S{ particle_t f S{ float2_t f 0.5 0.15 } S{ float2_t f 0.5 0.15 } 1.0 }
- S{ particle_t f S{ float2_t f 0.5 0.1 } S{ float2_t f 0.5 0.1 } 9.0 }
+ S{ particle_t f float-array{ 0.5 0.5 } float-array{ 0.1 0.1 } 2.0 }
+ S{ particle_t f float-array{ 0.5 0.6 } float-array{ -0.1 0 } 1.0 }
+ S{ particle_t f float-array{ 0.6 0.5 } float-array{ 0 -0.1 } 3.0 }
+ S{ particle_t f float-array{ 0.7 0.5 } float-array{ 0.1 0.1 } 1.0 }
+ S{ particle_t f float-array{ 0.1 0.5 } float-array{ -0.1 -0.1 } 5.0 }
+ S{ particle_t f float-array{ 0.2 0.5 } float-array{ 0 0 } 1.0 }
+ S{ particle_t f float-array{ 0.3 0.3 } float-array{ 0 0 } 4.0 }
+ S{ particle_t f float-array{ 0.5 0.15 } float-array{ 0 0 } 1.0 }
+ S{ particle_t f float-array{ 0.5 0.1 } float-array{ 0 0 } 9.0 }
}
: integrate-particles! ( particles dt -- particles )
M:: fluids-world draw-world* ( world -- )
world particles>> [
- [ p>> [ x>> , ] [ y>> , ] bi ] each
+ [ p>> [ first , ] [ second , ] bi ] each
] curry float-array{ } make :> verts
[
- verts world texture>> 50.0 { 320 240 } blended-point-sprite-batch &dispose
-
+ verts world texture>> 30.0 world dim>> { 4 4 } v/
+ blended-point-sprite-batch &dispose
blend-state new set-gpu-state
-
- gaussian-blur &dispose world ramp>> { 1024 768 } step-texture &dispose
- { 1024 768 } draw-texture
- ] with-destructors
- ;
+ gaussian-blur &dispose
+ world ramp>> world dim>> step-texture &dispose
+ world dim>> draw-texture
+ ] with-destructors ;
GAME: fluids {
{ world-class fluids-world }
{ tick-interval-micros $[ 60 fps ] }
} ;
-MAIN: fluids
-
fluids-world H{
{ T{ button-down } [ [
- hand-loc get { 1024 768 } v/ 2 v*n 1 v-n { 1 -1 } v* first2 float2_t <struct-boa>
- dup 2.0 particle_t <struct-boa> suffix
+ hand-loc get >float-array
+ world get dim>> >float-array v/ 2 v*n 1 v-n { 1 -1 } v*
+ float-array{ 0 0.2 } 2.0 particle_t <struct-boa> suffix
] change-particles drop ] }
} set-gestures