func surfacePosNormList(surf *md3.Surface, frame int, output chan<- surfaceStringPair) {
buffer := new(bytes.Buffer)
vertCount := surf.NumVertices()
for vertIndex := 0; vertIndex < vertCount; vertIndex++ {
posNorm := surf.Vertex(frame, vertIndex)
if *swapYZ {
var t float32
t = posNorm.Origin.Y
posNorm.Origin.Y = posNorm.Origin.Z
posNorm.Origin.Z = t
t = posNorm.Normal.Y
posNorm.Normal.Y = posNorm.Normal.Z
posNorm.Normal.Z = t
}
_, err := fmt.Fprintf(buffer,
"v %f %f %f\nvn %f %f %f\n",
posNorm.Origin.X, posNorm.Origin.Y, posNorm.Origin.Z,
posNorm.Normal.X, posNorm.Normal.Y, posNorm.Normal.Z)
if err != nil {
panic(err)
}
}
output <- surfaceStringPair{surf, buffer.String()}
}
func surfaceTexCoordList(surf *md3.Surface, output chan<- surfaceStringPair) {
buffer := new(bytes.Buffer)
vertCount := surf.NumVertices()
for vertIndex := 0; vertIndex < vertCount; vertIndex++ {
texCoord := surf.TexCoord(vertIndex)
if *flipUVs {
texCoord.T = 1.0 - texCoord.T
}
_, err := fmt.Fprintf(buffer, "vt %f %f\n",
texCoord.S, texCoord.T)
if err != nil {
panic(err)
}
}
output <- surfaceStringPair{surf, buffer.String()}
}
func surfaceTriangleList(surf *md3.Surface, baseVertex int, output chan<- surfaceStringPair) {
var err error
buffer := new(bytes.Buffer)
triCount := surf.NumTriangles()
for triIndex := 0; triIndex < triCount; triIndex++ {
tri := surf.Triangle(triIndex)
if *swapYZ {
_, err = fmt.Fprintf(buffer, "f %[1]d/%[1]d/%[1]d %[2]d/%[2]d/%[2]d %[3]d/%[3]d/%[3]d\n",
baseVertex+int(tri.A), baseVertex+int(tri.B), baseVertex+int(tri.C))
} else {
_, err = fmt.Fprintf(buffer, "f %[3]d/%[3]d/%[3]d %[2]d/%[2]d/%[2]d %[1]d/%[1]d/%[1]d\n",
baseVertex+int(tri.A), baseVertex+int(tri.B), baseVertex+int(tri.C))
}
if err != nil {
panic(err)
}
}
output <- surfaceStringPair{surf, buffer.String()}
}
func writeOBJSurface(w io.Writer, surf *md3.Surface, posNorms, texCoords, triangles map[*md3.Surface]string) error {
fmt.Fprintf(w, "g %s\n", surf.Name())
n, err := io.WriteString(w, posNorms[surf])
if err != nil {
return err
} else if n < len(posNorms[surf]) {
return fmt.Errorf("Error writing positions and normals: only %d of %d bytes written")
}
n, err = io.WriteString(w, texCoords[surf])
if err != nil {
return err
} else if n < len(texCoords[surf]) {
return fmt.Errorf("Error writing texcoords: only %d of %d bytes written")
}
n, err = io.WriteString(w, triangles[surf])
if n < len(triangles[surf]) {
return fmt.Errorf("Error writing triangles: only %d of %d bytes written")
}
return err
}