Sort of working obj read
This commit is contained in:
parent
64d3525a2a
commit
330c448a5d
@ -6,14 +6,14 @@ import (
|
|||||||
"log"
|
"log"
|
||||||
"os"
|
"os"
|
||||||
"runtime/pprof" // For performance whatever
|
"runtime/pprof" // For performance whatever
|
||||||
|
// "github.com/udhos/gwob"
|
||||||
"github.com/udhos/gwob"
|
|
||||||
)
|
)
|
||||||
|
|
||||||
const (
|
const (
|
||||||
Width = 512
|
Width = 512
|
||||||
Height = 512
|
Height = 512
|
||||||
LineRepeat = 1_000_000
|
ObjectFile = "head.obj"
|
||||||
|
//LineRepeat = 1_000_000
|
||||||
)
|
)
|
||||||
|
|
||||||
func must(err error) {
|
func must(err error) {
|
||||||
@ -42,17 +42,41 @@ func main() {
|
|||||||
|
|
||||||
fb := NewFramebuffer(Width, Height)
|
fb := NewFramebuffer(Width, Height)
|
||||||
|
|
||||||
|
log.Printf("Loading obj %s", ObjectFile)
|
||||||
|
|
||||||
|
of, err := os.Open(ObjectFile)
|
||||||
|
must(err)
|
||||||
|
defer of.Close()
|
||||||
|
o, err := ParseObj(of)
|
||||||
|
must(err)
|
||||||
|
// gwobopts := &gwob.ObjParserOptions {}
|
||||||
|
// o, err := gwob.NewObjFromFile(ObjectFile, gwobopts)
|
||||||
|
// must(err)
|
||||||
|
|
||||||
log.Printf("Running render")
|
log.Printf("Running render")
|
||||||
|
|
||||||
// Just draw a simple line (a million times or something)
|
for _, f := range o.Faces {
|
||||||
for range LineRepeat {
|
log.Printf("%v", f)
|
||||||
// LineDumb5(&fb, 0xFFFFFF, 100, 100, 350, 200)
|
for i := range 3 { // Triangles, bro
|
||||||
// LineDumb5(&fb, 0xFF0000, 120, 100, 200, 350)
|
v0 := f[i]
|
||||||
// LineDumb5(&fb, 0xFF0000, 350, 200, 100, 100) // backward first line
|
v1 := f[(i+1)%3]
|
||||||
Bresenham2(&fb, 0xFFFFFF, 100, 100, 350, 200)
|
x0 := int((v0.X + 1) * float32(fb.Width/2))
|
||||||
Bresenham2(&fb, 0xFF0000, 120, 100, 200, 350)
|
y0 := int((v0.Y + 1) * float32(fb.Height/2))
|
||||||
Bresenham2(&fb, 0xFF0000, 350, 200, 100, 100) // backward first line
|
x1 := int((v1.X + 1) * float32(fb.Width/2))
|
||||||
|
y1 := int((v1.Y + 1) * float32(fb.Height/2))
|
||||||
|
Bresenham2(&fb, 0xFFFFFF, x0, int(fb.Height)-y0, x1, int(fb.Height)-y1)
|
||||||
}
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Just draw a simple line (a million times or something)
|
||||||
|
// for range LineRepeat {
|
||||||
|
// // LineDumb5(&fb, 0xFFFFFF, 100, 100, 350, 200)
|
||||||
|
// // LineDumb5(&fb, 0xFF0000, 120, 100, 200, 350)
|
||||||
|
// // LineDumb5(&fb, 0xFF0000, 350, 200, 100, 100) // backward first line
|
||||||
|
// Bresenham2(&fb, 0xFFFFFF, 100, 100, 350, 200)
|
||||||
|
// Bresenham2(&fb, 0xFF0000, 120, 100, 200, 350)
|
||||||
|
// Bresenham2(&fb, 0xFF0000, 350, 200, 100, 100) // backward first line
|
||||||
|
// }
|
||||||
|
|
||||||
log.Printf("Exporting ppm to stdout")
|
log.Printf("Exporting ppm to stdout")
|
||||||
fmt.Print(fb.ExportPPM())
|
fmt.Print(fb.ExportPPM())
|
||||||
|
@ -5,6 +5,7 @@ import (
|
|||||||
"bufio"
|
"bufio"
|
||||||
"fmt"
|
"fmt"
|
||||||
"io"
|
"io"
|
||||||
|
"log"
|
||||||
"strings"
|
"strings"
|
||||||
)
|
)
|
||||||
|
|
||||||
@ -19,27 +20,42 @@ type ObjModel struct {
|
|||||||
Faces []Facef
|
Faces []Facef
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Parse an obj file at the given reader. Only handles v and f right now
|
||||||
func ParseObj(reader io.Reader) (*ObjModel, error) {
|
func ParseObj(reader io.Reader) (*ObjModel, error) {
|
||||||
result := ObjModel{
|
result := ObjModel{
|
||||||
Vertices: make([]Vec3f, 0),
|
Vertices: make([]Vec3f, 0),
|
||||||
Faces: make([]Facef, 0),
|
Faces: make([]Facef, 0),
|
||||||
}
|
}
|
||||||
scanner := bufio.NewScanner(reader)
|
breader := bufio.NewReader(reader)
|
||||||
for scanner.Scan() {
|
done := false
|
||||||
|
for !done {
|
||||||
// Scan a line
|
// Scan a line
|
||||||
line := strings.Trim(scanner.Text(), " \t")
|
line, err := breader.ReadString('\n')
|
||||||
|
if err != nil {
|
||||||
|
if err == io.EOF {
|
||||||
|
done = true
|
||||||
|
} else {
|
||||||
|
log.Printf("NOT EOF ERR?")
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
}
|
||||||
|
line = strings.Trim(line, " \t\n\r")
|
||||||
|
if len(line) == 0 {
|
||||||
|
continue
|
||||||
|
}
|
||||||
// Find the first "item", whatever that is. This also gets rid of comments
|
// 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
|
// since we just don't use lines that start with # (no handler
|
||||||
var t string
|
var t string
|
||||||
_, err := fmt.Sscan(line, t)
|
_, err = fmt.Sscan(line, &t)
|
||||||
if err != nil {
|
if err != nil {
|
||||||
|
log.Printf("SSCANF ERR")
|
||||||
return nil, err
|
return nil, err
|
||||||
}
|
}
|
||||||
line = line[len(t):]
|
line = line[len(t):]
|
||||||
if t == "v" {
|
if t == "v" {
|
||||||
// Read a vertex, should be just three floats
|
// Read a vertex, should be just three floats
|
||||||
var vertex Vec3f
|
var vertex Vec3f
|
||||||
_, err := fmt.Sscan(line, vertex.X, vertex.Y, vertex.Z)
|
_, err := fmt.Sscan(line, &vertex.X, &vertex.Y, &vertex.Z)
|
||||||
if err != nil {
|
if err != nil {
|
||||||
return nil, err
|
return nil, err
|
||||||
}
|
}
|
||||||
@ -50,7 +66,7 @@ func ParseObj(reader io.Reader) (*ObjModel, error) {
|
|||||||
var face Facef
|
var face Facef
|
||||||
for i := range 3 {
|
for i := range 3 {
|
||||||
var vi, ti0, ti1 int
|
var vi, ti0, ti1 int
|
||||||
_, err := fmt.Sscanf(line, "%d/%d/%d", vi, ti0, ti1)
|
_, err := fmt.Sscanf(line, "%d/%d/%d", &vi, &ti0, &ti1)
|
||||||
if err != nil {
|
if err != nil {
|
||||||
return nil, err
|
return nil, err
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user