func uploadGeometry(mesh *geometry) {
gl.GenVertexArrays(1, &mesh.glVao)
gl.BindVertexArray(mesh.glVao)
gl.GenBuffers(1, &mesh.glVertBuf)
gl.BindBuffer(gl.ARRAY_BUFFER, mesh.glVertBuf)
gl.EnableVertexAttribArray(progPosAttrLoc)
gl.VertexAttribPointer(progPosAttrLoc, 3, gl.FLOAT, gl.FALSE, 0, gl.Ptr(nil))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(4*len(mesh.glVerts)), gl.Ptr(&mesh.glVerts[0]), gl.STATIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindVertexArray(0)
}
// Sets up this vertex array object. Unless atts are specified, prog can be be nil.
// To specify element/index buffer and vertex/attribute buffers (if applicable), pass them via bufs.
func (me *VertexArray) Setup(prog *Program, atts []VertexAttribPointer, bufs ...*Buffer) (err error) {
var (
buf *Buffer
aloc gl.Uint
)
me.Bind()
for _, buf = range bufs {
buf.Bind()
}
for i := 0; i < len(atts); i++ {
if aloc = prog.AttrLocs[atts[i].Name]; prog.HasAttr(atts[i].Name) {
gl.EnableVertexAttribArray(aloc)
gl.VertexAttribPointer(aloc, atts[i].Size, atts[i].Type, atts[i].Normalized, atts[i].Stride, atts[i].Offset)
}
}
me.Unbind()
for _, buf = range bufs {
buf.Unbind()
}
err = Util.LastError("VertexArray.Setup()")
return
}