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package main
import (
"fmt"
g "github.com/AllenDang/giu"
"image"
"image/draw"
_ "image/jpeg"
"os"
"time"
"github.com/sam-anthony/volute/compressor"
"github.com/sam-anthony/volute/mass"
"github.com/sam-anthony/volute/pressure"
"github.com/sam-anthony/volute/temperature"
"github.com/sam-anthony/volute/util"
"github.com/sam-anthony/volute/volume"
)
const (
gasConstant = 8.314472
airMolarMass = 0.0289647 // kg/mol
)
// numPoints is the number of datapoints on the compressor map.
var numPoints = 1
var (
displacement = volume.Volume{2000, volume.CubicCentimetre}
// selectedVolumeUnit is used to index volume.UnitStrings().
selectedVolumeUnit = volume.DefaultUnitIndex
engineSpeed = []int32{2000}
volumetricEfficiency = []int32{80}
intakeAirTemperature = []temperature.Temperature{{25, temperature.Celcius}}
// selectedTemperatureUnit is used to index temperature.UnitStrings().
selectedTemperatureUnit = temperature.DefaultUnitIndex
manifoldPressure = []pressure.Pressure{{100, pressure.DefaultUnit}}
// selectedPressureUnit is used to index pressure.UnitStrings().
selectedPressureUnit = pressure.DefaultUnitIndex
)
var pressureRatio []float32
func pressureRatioAt(point int) float32 {
u := pressure.Pascal
m := manifoldPressure[point].AsUnit(u)
a := pressure.Atmospheric().AsUnit(u)
return m / a
}
func init() {
pressureRatio = append(pressureRatio, pressureRatioAt(0))
}
var (
engineMassFlowRate []mass.FlowRate
// selectedMassFlowRateUnit is used to index mass.FlowRateUnitStrings().
selectedMassFlowRateUnit = mass.DefaultFlowRateUnitIndex
)
func massFlowRateAt(point int) mass.FlowRate {
rpm := float32(engineSpeed[point])
disp := displacement.AsUnit(volume.CubicMetre)
ve := float32(volumetricEfficiency[point]) / 100.0
cubicMetresPerMin := (rpm / 2.0) * disp * ve
iat, err := intakeAirTemperature[point].AsUnit(temperature.Kelvin)
util.Check(err)
pres := manifoldPressure[point].AsUnit(pressure.Pascal)
molsPerMin := (pres * cubicMetresPerMin) / (gasConstant * iat)
kgPerMin := molsPerMin * airMolarMass
massPerMin := mass.Mass{kgPerMin, mass.Kilogram}
u, err := mass.FlowRateUnitFromString(mass.FlowRateUnitStrings()[selectedMassFlowRateUnit])
util.Check(err)
mfr, err := mass.NewFlowRate(massPerMin, time.Minute, u)
util.Check(err)
return mfr
}
func init() {
engineMassFlowRate = append(engineMassFlowRate, massFlowRateAt(0))
}
func loop() {
g.SingleWindow().Layout(
engineDisplacementRow(),
g.Table().
Size(g.Auto, 190).
Rows(
engineSpeedRow(),
volumetricEfficiencyRow(),
intakeAirTemperatureRow(),
manifoldPressureRow(),
pressureRatioRow(),
massFlowRateRow(),
duplicateDeleteRow(),
).
Columns(
columns()...,
),
selectCompressor(),
g.Custom(compressorWidget),
)
}
var (
compressorImage *image.RGBA
compressorTexture *g.Texture
selectedCompressor compressor.Compressor
)
func setCompressor(c compressor.Compressor) {
f, err := os.Open(c.FileName)
util.Check(err)
defer f.Close()
j, _, err := image.Decode(f)
util.Check(err)
b := j.Bounds()
m := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(m, m.Bounds(), j, b.Min, draw.Src)
selectedCompressor = c
compressorImage = m
go updateCompImg()
}
func init() {
c, ok := compressor.Compressors()["Garrett"]["G"]["25-660"]
if !ok {
fmt.Println("Garrett G25-660 not in compressor.Compressors().")
os.Exit(1)
}
setCompressor(c)
}
func main() {
wnd := g.NewMasterWindow("volute", 400, 200, 0)
go updateCompImg()
m := <-updatedCompImg
g.EnqueueNewTextureFromRgba(m, func(tex *g.Texture) {
compressorTexture = tex
})
wnd.Run(loop)
}
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