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parser.go
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/
parser.go
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package gotracer
import (
"encoding/json"
"io/ioutil"
"log"
"github.com/Bredgren/misc"
"github.com/go-gl/mathgl/mgl64"
)
type Parser func(scene *Scene, value interface{})
var SettingParsers map[string]Parser = make(map[string]Parser)
func ReadSettingsFile(fileName string) interface{} {
log.Println("ReadSettingsFile", fileName)
contents, err := ioutil.ReadFile(fileName)
misc.Check(err)
var settings interface{}
err = json.Unmarshal(contents, &settings)
misc.Check(err)
return settings
}
func ParseSetting(scene *Scene, setting string, value interface{}) {
if setting[0] == '_' {
return
}
if fn := SettingParsers[setting]; fn == nil {
log.Printf("Warning: unknown setting '%s'", setting)
} else {
fn(scene, value)
}
}
// ParseColor64 takes an interface{} which it assumes is actually a [3]float64
// and converts it to a Color64.
func ParseColor64(floatArray interface{}) Color64 {
a := floatArray.([]interface{})
return Color64{a[0].(float64), a[1].(float64), a[2].(float64)}
}
// ParseVector takes an interface{} which it assumes is actually a [3]float64
// and converts it to a mgl64.Vec3.
func ParseVector(floatArray interface{}) mgl64.Vec3 {
a := floatArray.([]interface{})
return mgl64.Vec3{a[0].(float64), a[1].(float64), a[2].(float64)}
}