Working on object parser
This commit is contained in:
parent
ff7ea1cf25
commit
64d3525a2a
@ -1,3 +1,5 @@
|
||||
module tinyrender1
|
||||
|
||||
go 1.22.5
|
||||
|
||||
require github.com/udhos/gwob v1.0.0
|
||||
|
2
tinyrender1/go.sum
Normal file
2
tinyrender1/go.sum
Normal file
@ -0,0 +1,2 @@
|
||||
github.com/udhos/gwob v1.0.0 h1:P9br9SLca7H5Hr/WuEcO9+ViUm+wlQnr4vxpPU6c6ww=
|
||||
github.com/udhos/gwob v1.0.0/go.mod h1:xj4qGbkwL1sTPm1V17NfcIhkgG2rjfb8cUv9YIqE6DE=
|
6357
tinyrender1/head.obj
Normal file
6357
tinyrender1/head.obj
Normal file
File diff suppressed because it is too large
Load Diff
@ -6,6 +6,8 @@ import (
|
||||
"log"
|
||||
"os"
|
||||
"runtime/pprof" // For performance whatever
|
||||
|
||||
"github.com/udhos/gwob"
|
||||
)
|
||||
|
||||
const (
|
||||
|
66
tinyrender1/obj.go
Normal file
66
tinyrender1/obj.go
Normal file
@ -0,0 +1,66 @@
|
||||
package main
|
||||
|
||||
// This reads obj files?
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"io"
|
||||
"strings"
|
||||
)
|
||||
|
||||
type Vec3f struct {
|
||||
X, Y, Z float32
|
||||
}
|
||||
|
||||
type Facef [3]Vec3f
|
||||
|
||||
type ObjModel struct {
|
||||
Vertices []Vec3f
|
||||
Faces []Facef
|
||||
}
|
||||
|
||||
func ParseObj(reader io.Reader) (*ObjModel, error) {
|
||||
result := ObjModel{
|
||||
Vertices: make([]Vec3f, 0),
|
||||
Faces: make([]Facef, 0),
|
||||
}
|
||||
scanner := bufio.NewScanner(reader)
|
||||
for scanner.Scan() {
|
||||
// Scan a line
|
||||
line := strings.Trim(scanner.Text(), " \t")
|
||||
// Find the first "item", whatever that is. This also gets rid of comments
|
||||
// since we just don't use lines that start with # (no handler
|
||||
var t string
|
||||
_, err := fmt.Sscan(line, t)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
line = line[len(t):]
|
||||
if t == "v" {
|
||||
// Read a vertex, should be just three floats
|
||||
var vertex Vec3f
|
||||
_, err := fmt.Sscan(line, vertex.X, vertex.Y, vertex.Z)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
result.Vertices = append(result.Vertices, vertex)
|
||||
} else if t == "f" {
|
||||
// Read a face; in our example, it's always three sets.
|
||||
// For THIS example, we throw away those other values
|
||||
var face Facef
|
||||
for i := range 3 {
|
||||
var vi, ti0, ti1 int
|
||||
_, err := fmt.Sscanf(line, "%d/%d/%d", vi, ti0, ti1)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if vi > len(result.Vertices) || vi < 1 {
|
||||
return nil, fmt.Errorf("Face vertex index out of bounds: %d", vi)
|
||||
}
|
||||
face[i] = result.Vertices[vi-1]
|
||||
}
|
||||
result.Faces = append(result.Faces, face)
|
||||
}
|
||||
}
|
||||
return &result, nil
|
||||
}
|
Loading…
Reference in New Issue
Block a user