func CreateVOB() {
Verticies := [...]gl.Float{-0.8f, -0.8f, 0.0f, 1.0f,
0.0f, 0.8f, 0.0f, 1.0f,
0.8f, -0.8f, 0.0f, 1.0f}
Colours := [...]gl.Float{1.0f, 0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f, 1.0f}
BufferSize = unsafe.Sizeof(Verticies)
VertexSize = unsafe.Sizeof(Verticies[0])
RgbOffset = unsafe.Sizeof(Verticies[0].XYZW)
gl.GenVertexArrays(1, &VaoId)
gl.BindVertexArray(VaoId)
gl.GenBuffers(1, &VboId)
gl.BindBuffer(gl.ARRAY_BUFFER, VboId)
gl.BufferData(gl.ARRAY_BUFFER, unsafe.Sizeof(Verticies), Verticies, gl.STATIC_DRAW)
gl.VertexAttribPointer(1, 4, gl.Float, gl.FALSE, 0, 0)
gl.EnableVertexAttribArray(1)
if err := gl.GetError(); err != gl.NO_ERROR {
fmt.Println(err, "ERROR: Could not create a VBO")
}
}
func display() {
gl.ClearColor(0.19, 0.19, 0.21, 0)
gl.ClearDepth(1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.UseProgram(theProgram)
// Temporarily set the cam t clip
id := gls.Identity()
trans := getLookAtMatrix()
// log.Println(trans)
gls.UniformMatrix4fv(wtcm_unif, 1, false, trans)
gls.UniformMatrix4fv(mtwm_unif, 1, false, id)
// And here we do the actual rendering
// Generate a name for vufferobj and store it
gl.GenBuffers(1, &positionBufferObject)
// Bind it to a target
gl.BindBuffer(gl.ARRAY_BUFFER, positionBufferObject)
// Conver all nodes to a long array of vertexes!
i := 0
// TODO: Fix this, based on 4 per eleemnts
vpos := make([]float32, len(elements)*4*4)
elms := make(map[uint32]mS, len(elements))
// Note that the order here is undefined!
ii := 0
for k, v := range elements {
elms[k] = mS{ii, len(v.Nodes())}
for _, vv := range v.Nodes() {
ii++
vpos[i] = float32(nodes[vv][0])
i++
vpos[i] = float32(nodes[vv][1])
i++
vpos[i] = float32(nodes[vv][2])
i++
vpos[i] = 1.0
i++
}
}
/*
for _, v := range nodes {
vpos[i] = float32(v[0])
i++
vpos[i] = float32(v[1])
i++
vpos[i] = float32(v[2])
i++
}
*/
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(32/8*len(vpos)), (gl.Pointer)(&vpos[0]), gl.STATIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, positionBufferObject)
gl.EnableVertexAttribArray(0)
gl.VertexAttribPointer(0, 4, gl.FLOAT, gl.FALSE, 0, (gl.Pointer)(nil))
/* for _,v := range elms {
}
*/
for _, v := range elms {
gl.DrawArrays(gl.LINE_LOOP, gl.Int(v.Start), gl.Sizei(v.Length))
}
// Draw Coordinate acis
/*for i := 9; i < 9+2*5; i += 2 {
gl.DrawArrays(gl.LINE_STRIP, gl.Int(i), 2)
}*/
}
func MakeAtomicCounters(glPtr *gl.Uint, num gl.Sizei) {
gl.GenBuffers(1, glPtr)
gl.BindBuffer(gl.ATOMIC_COUNTER_BUFFER, *glPtr)
gl.BufferData(gl.ATOMIC_COUNTER_BUFFER, gl.Sizeiptr(4*num), gl.Pointer(nil), BufMode)
gl.BindBuffer(gl.ATOMIC_COUNTER_BUFFER, 0)
}
func glFillBuffer(vals []gl.Float, buf *gl.Uint) {
gl.GenBuffers(1, buf)
gl.BindBuffer(gl.ARRAY_BUFFER, *buf)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(vals)*4), gl.Pointer(&vals[0]), gl.STATIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
}
func MakeArrayBuffer(glPtr *gl.Uint, size uint64, sl interface{}, isLen, makeTex bool) gl.Uint {
var ptr = gl.Pointer(nil)
var glTex gl.Uint = 0
var glTexFormat gl.Enum = gl.R8UI
var sizeFactor, sizeTotal uint64 = 1, 0
var tm = false
var handle = func(sf uint64, glPtr gl.Pointer, le int, tf gl.Enum) {
tm = true
if le > 1 {
ptr = glPtr
}
if size == 0 {
size = uint64(le)
isLen = true
}
if isLen {
sizeFactor = sf
}
if tf != 0 {
glTexFormat = tf
}
}
if (sl == nil) && FillWithZeroes {
sl = make([]uint8, size)
}
gl.GenBuffers(1, glPtr)
gl.BindBuffer(gl.ARRAY_BUFFER, *glPtr)
if sl != nil {
if tv, tb := sl.([]uint8); tb {
handle(1, gl.Pointer(&tv[0]), len(tv), gl.R8UI)
}
if tv, tb := sl.([]uint16); tb {
handle(2, gl.Pointer(&tv[0]), len(tv), gl.R16UI)
}
if tv, tb := sl.([]uint32); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32UI)
}
if tv, tb := sl.([]uint64); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32UI)
}
if tv, tb := sl.([]int8); tb {
handle(1, gl.Pointer(&tv[0]), len(tv), gl.R8I)
}
if tv, tb := sl.([]int16); tb {
handle(2, gl.Pointer(&tv[0]), len(tv), gl.R16I)
}
if tv, tb := sl.([]int32); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32I)
}
if tv, tb := sl.([]int64); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32I)
}
if tv, tb := sl.([]float32); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32F)
}
if tv, tb := sl.([]float64); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32F)
}
if tv, tb := sl.([]gl.Bitfield); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R8UI)
}
if tv, tb := sl.([]gl.Byte); tb {
handle(1, gl.Pointer(&tv[0]), len(tv), gl.R8I)
}
if tv, tb := sl.([]gl.Ubyte); tb {
handle(1, gl.Pointer(&tv[0]), len(tv), gl.R8UI)
}
if tv, tb := sl.([]gl.Ushort); tb {
handle(2, gl.Pointer(&tv[0]), len(tv), gl.R16UI)
}
if tv, tb := sl.([]gl.Short); tb {
handle(2, gl.Pointer(&tv[0]), len(tv), gl.R16I)
}
if tv, tb := sl.([]gl.Uint); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32UI)
}
if tv, tb := sl.([]gl.Uint64); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32UI)
}
if tv, tb := sl.([]gl.Int); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32I)
}
if tv, tb := sl.([]gl.Int64); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32I)
}
if tv, tb := sl.([]gl.Clampd); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32F)
}
if tv, tb := sl.([]gl.Clampf); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32F)
}
if tv, tb := sl.([]gl.Float); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32F)
}
if tv, tb := sl.([]gl.Half); tb {
handle(2, gl.Pointer(&tv[0]), len(tv), gl.R16F)
}
if tv, tb := sl.([]gl.Double); tb {
handle(8, gl.Pointer(&tv[0]), len(tv), gl.RG32F)
}
if tv, tb := sl.([]gl.Enum); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32I)
}
if tv, tb := sl.([]gl.Sizei); tb {
handle(4, gl.Pointer(&tv[0]), len(tv), gl.R32UI)
}
if tv, tb := sl.([]gl.Char); tb {
handle(1, gl.Pointer(&tv[0]), len(tv), gl.R8UI)
}
if !tm {
log.Panicf("MakeArrayBuffer() -- slice type unsupported:\n%+v", sl)
}
}
sizeTotal = size * sizeFactor
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(sizeTotal), ptr, BufMode)
if makeTex {
if sizeTotal > MaxTextureBufferSize() {
log.Panicf("Texture buffer size (%vMB) would exceed your GPU's maximum texture buffer size (%vMB)", sizeTotal/MB, maxTexBufSize/MB)
}
gl.GenTextures(1, &glTex)
gl.BindTexture(gl.TEXTURE_BUFFER, glTex)
gl.TexBuffer(gl.TEXTURE_BUFFER, glTexFormat, *glPtr)
gl.BindTexture(gl.TEXTURE_2D, 0)
}
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
PanicIfErrors("MakeArrayBuffer()")
return glTex
}