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68 lines
1.0 KiB
Go
68 lines
1.0 KiB
Go
package ent
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import (
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"fmt"
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"github.com/jordanorelli/hyperstone/bit"
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)
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func vectorType(spec *typeSpec, env *Env) tÿpe {
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if spec.encoder != "" {
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return nil
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}
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t := floatType(spec, env)
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if _, ok := t.(error); ok {
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return t
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}
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if t == nil {
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return nil
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}
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return &vector_t{elem: t}
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}
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type vector_t struct {
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elem tÿpe
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}
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func (t vector_t) typeName() string {
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return fmt.Sprintf("vector:%s", t.elem.typeName())
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}
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func (t *vector_t) nü() value {
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return &vector{t: t}
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}
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type vector struct {
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t tÿpe
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x, y, z value
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}
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func (v vector) tÿpe() tÿpe { return v.t }
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func (v *vector) read(r bit.Reader) error {
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if v.x == nil {
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v.x = v.t.nü()
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}
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if v.y == nil {
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v.y = v.t.nü()
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}
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if v.z == nil {
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v.z = v.t.nü()
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}
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type fn func(bit.Reader) error
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coalesce := func(fns ...fn) error {
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for _, f := range fns {
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if err := f(r); err != nil {
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return err
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}
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}
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return nil
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}
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return coalesce(v.x.read, v.y.read, v.z.read)
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}
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func (v vector) String() string {
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return fmt.Sprintf("vector<%s>{%s %s %s}", v.t.typeName, v.x, v.y, v.z)
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}
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