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types.go
48 lines (38 loc) · 900 Bytes
/
types.go
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package gg
import "fmt"
type DataType struct {
raw rawType
cols byte
rows byte
name string
}
func (dt DataType) String() string {
return dt.name
}
type rawType byte
const (
rawFloat rawType = iota + 1
rawInt
rawUint
)
var GlFloat = DataType{raw: rawFloat, cols: 0, rows: 0, name: "float"}
var GlVec2 = DataType{raw: rawFloat, cols: 2, rows: 0, name: "vec2"}
var GlVec3 = DataType{raw: rawFloat, cols: 3, rows: 0, name: "vec3"}
var GlVec4 = DataType{raw: rawFloat, cols: 4, rows: 0, name: "vec4"}
var typeNameMap = make(map[string]DataType)
func init() {
addToNameMap(GlFloat)
addToNameMap(GlVec2)
addToNameMap(GlVec3)
addToNameMap(GlVec4)
}
func addToNameMap(dt DataType) {
typeNameMap[dt.name] = dt
}
func typeFromString(str string) (DataType, error) {
dt, ok := typeNameMap[str]
if !ok {
return DataType{}, fmt.Errorf("Unknown datatype: '%s'", str)
}
return dt, nil
}