func (vb *VertexBuffer) Render(position Point3) {
gl.PushMatrix()
gl.Translated(
gl.Double(position.X),
gl.Double(position.Y),
gl.Double(position.Z))
gl.VertexPointer(
gl.Int(3),
gl.DOUBLE,
0,
gl.Pointer(&vb.VertexData[0]))
gl.ColorPointer(
gl.Int(4),
gl.DOUBLE,
0,
gl.Pointer(&vb.ColorData[0]))
gl.TexCoordPointer(
gl.Int(2),
gl.DOUBLE,
0,
gl.Pointer(&vb.TexCoordData[0]))
for i := range vb.RenderSteps {
rs := &vb.RenderSteps[i]
gl.DrawElements(
rs.Mode,
gl.Sizei(len(rs.Indices)),
gl.UNSIGNED_INT,
gl.Pointer(&rs.Indices[0]))
}
gl.PopMatrix()
}
func (ms *ManaSource) Draw(local *LocalData, zoom float64, dx float64, dy float64) {
if local.nodeTextureData == nil {
// gl.Enable(gl.TEXTURE_2D)
local.nodeTextureData = make([]byte, ms.options.NumNodeRows*ms.options.NumNodeCols*3)
gl.GenTextures(1, &local.nodeTextureId)
gl.BindTexture(gl.TEXTURE_2D, local.nodeTextureId)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.RGB,
gl.Sizei(ms.options.NumNodeRows),
gl.Sizei(ms.options.NumNodeCols),
0,
gl.RGB,
gl.UNSIGNED_BYTE,
gl.Pointer(&local.nodeTextureData[0]))
}
for i := range ms.rawNodes {
for c := 0; c < 3; c++ {
color_frac := ms.rawNodes[i].Mana[c] * 1.0 / ms.options.NodeMagnitude
color_range := float64(ms.options.MaxNodeBrightness - ms.options.MinNodeBrightness)
local.nodeTextureData[i*3+c] = byte(
color_frac*color_range + float64(ms.options.MinNodeBrightness))
}
}
gl.Enable(gl.TEXTURE_2D)
//gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, local.nodeTextureId)
gl.TexSubImage2D(
gl.TEXTURE_2D,
0,
0,
0,
gl.Sizei(ms.options.NumNodeRows),
gl.Sizei(ms.options.NumNodeCols),
gl.RGB,
gl.UNSIGNED_BYTE,
gl.Pointer(&local.nodeTextureData[0]))
base.EnableShader("nodes")
base.SetUniformI("nodes", "width", ms.options.NumNodeRows*3)
base.SetUniformI("nodes", "height", ms.options.NumNodeCols*3)
base.SetUniformI("nodes", "drains", 1)
base.SetUniformI("nodes", "tex0", 0)
base.SetUniformI("nodes", "tex1", 1)
base.SetUniformF("nodes", "zoom", float32(zoom))
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, local.nodeTextureId)
// I have no idea why this value for move works, but it does. So, hooray.
move := (dx - dy) / 2
texture.RenderAdvanced(move, -move, dy, dx, 3.1415926535/2, true)
base.EnableShader("")
gl.Disable(gl.TEXTURE_2D)
}
// NewSprite creates a new Sprite object using the given data, which is
// expected to be in RGBA format. If you use PNG image files, you can use the
// NewSpriteFromImage shortcut function instead.
func NewSprite(x, y, width, height float64, data []byte, clip int) (*Sprite, error) {
verticies := []float64{
x, y,
x + width, y,
x, y + height,
x + width, y + height,
x + width, y,
x, y + height}
shape, err := NewShape(gl.TRIANGLES, verticies)
if err != nil {
return nil, err
}
sprite := &Sprite{texcoordBuffer: 0, texture: nil, shape: shape}
texCoords := []float32{
0, 0,
1, 0,
0, 1,
1, 1,
1, 0,
0, 1}
gl.GenBuffers(1, &sprite.texcoordBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(sprite.texcoordBuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(texCoords)*4), gl.Pointer(&texCoords[0]), gl.STREAM_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
sprite.texture = make([]gl.Uint, clip)
gl.GenTextures(gl.Sizei(clip), &sprite.texture[0])
clips := make([][]byte, clip)
for i := range clips {
clips[i] = data[i*(len(data)/len(clips)) : (i+1)*(len(data)/len(clips))]
gl.BindTexture(gl.TEXTURE_2D, sprite.texture[len(clips)-1-i])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA,
gl.Sizei(width), gl.Sizei(height),
0, gl.RGBA, gl.UNSIGNED_BYTE,
gl.Pointer(&clips[i][0]))
}
gl.BindTexture(gl.TEXTURE_2D, 0)
return sprite, checkForErrors()
}
func (m *Model) draw() {
m.shader.use()
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, m.texture_id)
gl.Uniform1i(m.shader.uniform_texture, 0)
//texcoord
if m.has_uv {
gl.BindBuffer(gl.ARRAY_BUFFER, m.texcoord)
gl.EnableVertexAttribArray(m.shader.attribute_texcoord)
gl.VertexAttribPointer(
m.shader.attribute_texcoord,
2,
gl.FLOAT,
gl.FALSE,
0,
gl.Pointer(nil))
}
gl.BindBuffer(gl.ARRAY_BUFFER, m.buffer)
gl.EnableVertexAttribArray(m.shader.attribute_vertex)
gl.VertexAttribPointer(
m.shader.attribute_vertex,
3,
gl.FLOAT,
gl.FALSE,
0,
gl.Pointer(nil))
gl.BindBuffer(gl.ARRAY_BUFFER, m.normal_buf)
gl.EnableVertexAttribArray(m.shader.attribute_normal)
gl.VertexAttribPointer(
m.shader.attribute_normal,
3,
gl.FLOAT,
gl.FALSE,
0,
gl.Pointer(nil))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, m.index)
gl.DrawElements(gl.TRIANGLES, gl.Sizei(len(m.indices)), gl.UNSIGNED_INT, gl.Pointer(nil))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, 0)
gl.DisableVertexAttribArray(m.shader.attribute_vertex)
gl.DisableVertexAttribArray(m.shader.attribute_normal)
if m.has_uv {
gl.DisableVertexAttribArray(m.shader.attribute_texcoord)
}
}
func initquad() {
ver := []gl.Float{-1, 1, 1, 1, -1, -1, 1, -1}
gl.BindBuffer(gl.ARRAY_BUFFER, 1)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(4*len(ver)),
gl.Pointer(&ver[0]), gl.STATIC_DRAW)
gl.VertexPointer(2, gl.FLOAT, 0, nil)
tex := []gl.Float{0, 0, 1, 0, 0, 1, 1, 1}
gl.BindBuffer(gl.ARRAY_BUFFER, 2)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(4*len(tex)),
gl.Pointer(&tex[0]), gl.STATIC_DRAW)
gl.TexCoordPointer(2, gl.FLOAT, 0, nil)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
}
/*
Uses the image library to turn a PNG into a gl texture
*/
func createTexture(r io.Reader) (textureId gl.Uint, err error) {
img, err := png.Decode(r)
if err != nil {
return 0, err
}
rgbaImg, ok := img.(*image.RGBA)
if !ok {
return 0, errors.New("texture must be an RGBA image")
}
gl.GenTextures(1, &textureId)
gl.BindTexture(gl.TEXTURE_2D, textureId)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
// flip image: first pixel is lower left corner
imgWidth, imgHeight := img.Bounds().Dx(), img.Bounds().Dy()
data := make([]byte, imgWidth*imgHeight*4)
lineLen := imgWidth * 4
dest := len(data) - lineLen
for src := 0; src < len(rgbaImg.Pix); src += rgbaImg.Stride {
copy(data[dest:dest+lineLen], rgbaImg.Pix[src:src+rgbaImg.Stride])
dest -= lineLen
}
gl.TexImage2D(gl.TEXTURE_2D, 0, 4, gl.Sizei(imgWidth), gl.Sizei(imgHeight), 0, gl.RGBA,
gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
return textureId, nil
}
// Move moves the Shape object a specified distance.
func (shape *Shape) Move(x, y float64) {
var verticies []float32
for i := 0; i < len(shape.verticies); i += 2 {
shape.verticies[i] += float32(x)
shape.verticies[i+1] += float32(y)
}
if shape.scaleX != 1 || shape.scaleY != 1 {
verticies = make([]float32, len(shape.verticies))
xTransform := shape.verticies[0] - (shape.verticies[0] * float32(shape.scaleX))
yTransform := shape.verticies[1] - (shape.verticies[1] * float32(shape.scaleY))
for i := range verticies {
if i%2 == 0 {
verticies[i] = shape.verticies[i] * float32(shape.scaleX)
verticies[i] += xTransform
} else {
verticies[i] = shape.verticies[i] * float32(shape.scaleY)
verticies[i] += yTransform
}
}
} else {
verticies = shape.verticies
}
gl.BindBuffer(gl.ARRAY_BUFFER, shape.vertexBuffer)
gl.BufferSubData(gl.ARRAY_BUFFER, 0, gl.Sizeiptr(len(verticies)*4), gl.Pointer(&verticies[0]))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
}
func loadCubeToGPU() {
newNormal(0, 0, 1)
newVertex(-1, -1, 1)
newVertex(1, -1, 1)
newVertex(1, 1, 1)
newVertex(-1, 1, 1)
newNormal(0, 0, -1)
newVertex(-1, -1, -1)
newVertex(-1, 1, -1)
newVertex(1, 1, -1)
newVertex(1, -1, -1)
newNormal(0, 1, 0)
newVertex(-1, 1, -1)
newVertex(-1, 1, 1)
newVertex(1, 1, 1)
newVertex(1, 1, -1)
newNormal(0, -1, 0)
newVertex(-1, -1, -1)
newVertex(1, -1, -1)
newVertex(1, -1, 1)
newVertex(-1, -1, 1)
newNormal(1, 0, 0)
newVertex(1, -1, -1)
newVertex(1, 1, -1)
newVertex(1, 1, 1)
newVertex(1, -1, 1)
newNormal(-1, 0, 0)
newVertex(-1, -1, -1)
newVertex(-1, -1, 1)
newVertex(-1, 1, 1)
newVertex(-1, 1, -1)
gl.GenBuffers(1, &gVBO)
gl.BindBuffer(gl.ARRAY_BUFFER, gVBO)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(unsafe.Sizeof(Vertex{})*24), gl.Pointer(&Vertices[0]), gl.STATIC_DRAW)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.EnableClientState(gl.NORMAL_ARRAY)
gl.VertexPointer(3, gl.FLOAT, 24, nil)
tmpStruct := Vertex{}
gl.NormalPointer(gl.FLOAT, gl.Sizei(unsafe.Sizeof(Vertex{})), gl.Pointer(unsafe.Offsetof(tmpStruct.normal)))
}
func upload(id gl.Uint, data []byte, stride int, w int, h int) {
gl.BindTexture(gl.TEXTURE_2D, id)
gl.PixelStorei(gl.UNPACK_ROW_LENGTH, gl.Int(stride))
gl.PixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.LUMINANCE,
gl.Sizei(w), gl.Sizei(h), 0,
gl.LUMINANCE, gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
}
func (m *Model) init() (err error) {
m.shader.init("shader/simple.vert", "shader/simple.frag")
/*
gl.GenBuffers(1, &m.buffer)
gl.BindBuffer(gl.ARRAY_BUFFER, m.buffer);
gl.BufferData(
gl.ARRAY_BUFFER,
gl.Sizeiptr(len(m.vertices)* int(unsafe.Sizeof(m.vertices[0]))),
gl.Pointer(&m.vertices[0]),
gl.STATIC_DRAW);
*/
m.initBufferFloat(&m.buffer, gl.ARRAY_BUFFER, &m.vertices)
gl.GenBuffers(1, &m.index)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, m.index)
gl.BufferData(
gl.ELEMENT_ARRAY_BUFFER,
gl.Sizeiptr(len(m.indices)*int(unsafe.Sizeof(m.indices[0]))),
gl.Pointer(&m.indices[0]),
gl.STATIC_DRAW)
gl.GenBuffers(1, &m.normal_buf)
gl.BindBuffer(gl.ARRAY_BUFFER, m.normal_buf)
gl.BufferData(
gl.ARRAY_BUFFER,
gl.Sizeiptr(len(m.normals)*int(unsafe.Sizeof(m.normals[0]))),
gl.Pointer(&m.normals[0]),
gl.STATIC_DRAW)
m.initTexture()
if m.has_uv {
gl.GenBuffers(1, &m.texcoord)
gl.BindBuffer(gl.ARRAY_BUFFER, m.texcoord)
gl.BufferData(
gl.ARRAY_BUFFER,
gl.Sizeiptr(len(m.uvs)*int(unsafe.Sizeof(m.uvs[0]))),
gl.Pointer(&m.uvs[0]),
gl.STATIC_DRAW)
}
return
}
func (m *Model) initBufferFloat(buffer *gl.Uint, t gl.Enum, data *[]gl.Float) {
gl.GenBuffers(1, buffer)
gl.BindBuffer(t, *buffer)
gl.BufferData(
t,
gl.Sizeiptr(len(*data)*int(unsafe.Sizeof((*data)[0]))),
gl.Pointer(&(*data)[0]),
gl.STATIC_DRAW)
}
func glInit(width, height int) {
gl.Init()
gl.Enable(gl.TEXTURE_2D)
gl.PixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
gl.Ortho(0, gl.Double(width), gl.Double(height), 0, -1, 1)
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.EnableClientState(gl.COLOR_ARRAY)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
gl.VertexPointer(2, gl.FLOAT, 0, gl.Pointer(&vs[0]))
gl.ColorPointer(3, gl.UNSIGNED_BYTE, 0, gl.Pointer(&cs[0]))
gl.TexCoordPointer(2, gl.FLOAT, 0, gl.Pointer(&ts[0]))
}
func makeErrorTexture() {
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, (*gl.Uint)(&error_texture))
gl.BindTexture(gl.TEXTURE_2D, error_texture)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
pink := []byte{255, 0, 255, 255}
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.BYTE, gl.Pointer(&pink[0]))
}
func reuploadTexture(tex *gl.Uint, w, h int, data []byte) {
if *tex > 0 {
gl.BindTexture(gl.TEXTURE_2D, *tex)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(w), gl.Sizei(h), 0,
gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
if gl.GetError() != gl.NO_ERROR {
gl.DeleteTextures(1, tex)
panic("Failed to reupload texture")
}
return
}
*tex = uploadTexture_RGBA32(w, h, data)
}
// NewShapeFromShape creates a copy of an existing Shape object.
func NewShapeFromShape(copyShape *Shape) (*Shape, error) {
shape := &Shape{mode: copyShape.mode, size: copyShape.size, verticies: make([]float32, len(copyShape.verticies)),
scaleX: copyShape.scaleX, scaleY: copyShape.scaleY}
copy(shape.verticies, copyShape.verticies)
gl.GenBuffers(1, &shape.vertexBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, shape.vertexBuffer)
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(shape.verticies)*4), gl.Pointer(&shape.verticies[0]), gl.DYNAMIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return shape, checkForErrors()
}
func screenShot() {
b := make([]uint8, Width*Height*4)
gl.ReadPixels(0, 0, Width, Height, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&b[0]))
rect := image.Rect(0, 0, Width, Height)
im := image.NRGBA{
Pix: b,
Stride: Width * 4,
Rect: rect,
}
if f, err := os.Create("screenshot.png"); err == nil {
defer f.Close()
png.Encode(f, &im)
}
}
// NewShape creates a new Shape object based on the verticies and shape type.
func NewShape(shapeType ShapeType, verticies []float64) (*Shape, error) {
verticies32 := make([]float32, len(verticies))
for i, val := range verticies {
verticies32[i] = float32(val)
}
shape := &Shape{mode: gl.Enum(shapeType), size: len(verticies), vertexBuffer: 0, verticies: verticies32,
scaleX: 1, scaleY: 1}
gl.GenBuffers(1, &shape.vertexBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(shape.vertexBuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(shape.size*4), gl.Pointer(&shape.verticies[0]), gl.DYNAMIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return shape, checkForErrors()
}
func (m *Model) initTexture() {
//file, err := os.Open("model/test.png")
file, err := os.Open("model/ceil.png")
if err != nil {
log.Fatal(err)
}
defer file.Close()
img, _, err := image.Decode(file)
if err != nil {
log.Fatal(err)
}
rgbaImg, ok := img.(*image.NRGBA)
if !ok {
//return 0, errors.New("texture must be an NRGBA image")
log.Fatal("image is not rgba")
}
gl.GenTextures(1, &m.texture_id)
gl.BindTexture(gl.TEXTURE_2D, m.texture_id)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
// flip image: first pixel is lower left corner
img_width, img_height := img.Bounds().Dx(), img.Bounds().Dy()
data := make([]byte, img_width*img_height*4)
line_len := img_width * 4
dest := len(data) - line_len
for src := 0; src < len(rgbaImg.Pix); src += rgbaImg.Stride {
copy(data[dest:dest+line_len], rgbaImg.Pix[src:src+rgbaImg.Stride])
dest -= line_len
}
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.RGBA, //4,
gl.Sizei(img_width),
gl.Sizei(img_height),
0,
gl.RGBA,
gl.UNSIGNED_BYTE,
gl.Pointer(&data[0]))
}
func uploadTexture_RGBA32(w, h int, data []byte) gl.Uint {
var id gl.Uint
gl.GenTextures(1, &id)
gl.BindTexture(gl.TEXTURE_2D, id)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(w), gl.Sizei(h), 0, gl.RGBA,
gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
if gl.GetError() != gl.NO_ERROR {
gl.DeleteTextures(1, &id)
panic("Failed to load a texture")
}
return id
}
func (m *Manager) LoadSprite(path string) (*Sprite, error) {
// We can't run this during an init() function because it will get queued to
// run before the opengl context is created, so we just check here and run
// it if we haven't run it before.
gen_tex_once.Do(func() {
render.Queue(func() {
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, &error_texture)
gl.BindTexture(gl.TEXTURE_2D, error_texture)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
pink := []byte{255, 0, 255, 255}
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.RGBA,
1,
1,
0,
gl.RGBA,
gl.UNSIGNED_INT,
gl.Pointer(&pink[0]))
})
})
path = filepath.Clean(path)
err := m.loadSharedSprite(path)
if err != nil {
return nil, err
}
var s Sprite
m.mutex.Lock()
s.shared = m.shared[path]
m.mutex.Unlock()
s.anim_node = s.shared.anim_start
s.state_node = s.shared.state_start
return &s, nil
}
// Sets up anything that wouldn't have been loaded from disk, including
// all opengl data, and sets up finalizers for that data.
func (d *Dictionary) setupGlStuff() {
d.dlists = make(map[string]uint32)
d.strs = make(map[string]strBuffer)
d.pars = make(map[string]strBuffer)
// TODO: This finalizer is untested
runtime.SetFinalizer(d, func(d *Dictionary) {
render.Queue(func() {
for _, v := range d.dlists {
gl.DeleteLists(gl.Uint(v), 1)
}
})
})
render.Queue(func() {
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, (*gl.Uint)(&d.texture))
gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))
gl.PixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.ALPHA,
gl.Sizei(d.data.Dx),
gl.Sizei(d.data.Dy),
0,
gl.ALPHA,
gl.UNSIGNED_BYTE,
gl.Pointer(&d.data.Pix[0]))
gl.Disable(gl.TEXTURE_2D)
})
}
func (s *sheet) makeTexture(pixer <-chan []byte) {
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, &s.texture)
gl.BindTexture(gl.TEXTURE_2D, s.texture)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
data := <-pixer
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.RGBA,
gl.Sizei(s.dx),
gl.Sizei(s.dy),
0,
gl.RGBA,
gl.UNSIGNED_INT,
gl.Pointer(&data[0]))
memory.FreeBlock(data)
}
// SetScaling sets the scaling factor of the Shape object. For instance, an x
// and y scale value of two will make the Shape object twice as large.
func (shape *Shape) SetScaling(scaleX, scaleY float64) {
shape.scaleX = scaleX
shape.scaleY = scaleY
verticies := make([]float32, len(shape.verticies))
xTransform := shape.verticies[0] - (shape.verticies[0] * float32(scaleX))
yTransform := shape.verticies[1] - (shape.verticies[1] * float32(scaleY))
for i := range verticies {
if i%2 == 0 {
verticies[i] = shape.verticies[i] * float32(scaleX)
verticies[i] += xTransform
} else {
verticies[i] = shape.verticies[i] * float32(scaleY)
verticies[i] += yTransform
}
}
gl.BindBuffer(gl.ARRAY_BUFFER, shape.vertexBuffer)
gl.BufferSubData(gl.ARRAY_BUFFER, 0, gl.Sizeiptr(len(verticies)*4), gl.Pointer(&verticies[0]))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
}
func (w *glfwBackend) Open(width, height, zoom int, fs bool, font *FontData) {
if err := glfw.Init(); err != nil {
panic(err)
}
w.font = font
w.zoom = zoom
w.width = width
w.height = height
var fwidth = width * font.CellWidth * zoom
var fheight = height * font.CellHeight * zoom
var twidth = fwidth
var theight = fheight
flag := glfw.Windowed
if fs {
flag = glfw.Fullscreen
dm := glfw.DesktopMode()
twidth = dm.W
theight = dm.H
}
glfw.OpenWindowHint(glfw.WindowNoResize, gl.TRUE)
err := glfw.OpenWindow(twidth, theight, 8, 8, 8, 8, 0, 0, flag)
if err != nil {
panic(err)
}
w.key = NOKEY
glfw.SetWindowCloseCallback(func() int { w.Close(); return 0 })
glfw.SetKeyCallback(func(key, state int) { w.setKey(key, state) })
glfw.SetCharCallback(func(key, state int) { w.setKey(key, state) })
glfw.Enable(glfw.KeyRepeat)
w.mouse = new(MouseData)
glfw.Enable(glfw.MouseCursor)
glfw.SetMousePosCallback(func(x, y int) { w.mouseMove(x, y) })
glfw.SetMouseButtonCallback(func(but, state int) { w.mousePress(but, state) })
glfw.Enable(glfw.MouseCursor)
xoff := float32(twidth-fwidth) / 2.0
yoff := float32(theight-fheight) / 2.0
fc := float32(font.CellWidth * zoom)
fch := float32(font.CellHeight * zoom)
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
cx := xoff + float32(x)*fc
cy := yoff + float32(y)*fch
w.verts = append(w.verts, cx, cy, cx, cy+fch, cx+fc, cy+fch, cx+fc, cy)
}
}
runtime.LockOSThread()
glInit(twidth, theight)
m := font.Image.(*image.RGBA)
w.s = float32(font.CellWidth) / float32(m.Bounds().Max.X)
w.t = float32(font.CellHeight) / float32(m.Bounds().Max.Y)
textures = make([]gl.Uint, 2)
gl.GenTextures(2, &textures[0])
gl.BindTexture(gl.TEXTURE_2D, textures[0])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(m.Bounds().Max.X), gl.Sizei(m.Bounds().Max.Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&m.Pix[0]))
m = image.NewRGBA(image.Rect(0, 0, font.CellWidth, font.CellHeight))
draw.Draw(m, m.Bounds(), &image.Uniform{White}, image.ZP, draw.Src)
gl.BindTexture(gl.TEXTURE_2D, textures[1])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(m.Bounds().Max.X), gl.Sizei(m.Bounds().Max.Y), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&m.Pix[0]))
w.open = true
}
func Screenshot() {
log.Println("screenshot")
img := image.NewNRGBA(image.Rect(0, 0, Width, Height))
gl.ReadPixels(0, 0, gl.Sizei(Width), gl.Sizei(Height), gl.RGBA, gl.UNSIGNED_INT_8_8_8_8, gl.Pointer(&img.Pix[0]))
// reverse byte order, opengl seems to use little endian.
pix := img.Pix
for i := 0; i < len(pix); i += 4 {
pix[i+0], pix[i+1], pix[i+2], pix[i+3] = pix[i+3], pix[i+2], pix[i+1], pix[i+0]
}
fname := fmt.Sprintf("frame%04d.png", scroti)
scroti++
f, err := os.OpenFile(fname, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0666)
core.Fatal(err)
defer f.Close()
core.Fatal(png.Encode(f, img))
}
// Need floor, right wall, and left wall matrices to draw the details
func (room *Room) render(floor, left, right mathgl.Mat4, zoom float32, base_alpha byte, drawables []Drawable, los_tex *LosTexture, floor_drawers []FloorDrawer) {
do_color := func(r, g, b, a byte) {
R, G, B, A := room.Color()
A = alphaMult(A, base_alpha)
gl.Color4ub(alphaMult(R, r), alphaMult(G, g), alphaMult(B, b), alphaMult(A, a))
}
gl.Enable(gl.TEXTURE_2D)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.STENCIL_TEST)
gl.ClearStencil(0)
gl.Clear(gl.STENCIL_BUFFER_BIT)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
defer gl.DisableClientState(gl.VERTEX_ARRAY)
defer gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
var vert roomVertex
planes := []plane{
{room.left_buffer, room.Wall, &left},
{room.right_buffer, room.Wall, &right},
{room.floor_buffer, room.Floor, &floor},
}
gl.PushMatrix()
defer gl.PopMatrix()
if los_tex != nil {
gl.LoadMatrixf(&floor[0])
gl.ClientActiveTexture(gl.TEXTURE1)
gl.ActiveTexture(gl.TEXTURE1)
gl.Enable(gl.TEXTURE_2D)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
los_tex.Bind()
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
gl.ActiveTexture(gl.TEXTURE0)
base.EnableShader("los")
base.SetUniformI("los", "tex2", 1)
}
var mul, run mathgl.Mat4
for _, plane := range planes {
gl.LoadMatrixf(&floor[0])
run.Assign(&floor)
// Render the doors and cut out the stencil buffer so we leave them empty
// if they're open
switch plane.mat {
case &left:
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
for _, door := range room.Doors {
if door.Facing != FarLeft {
continue
}
door.TextureData().Bind()
R, G, B, A := door.Color()
do_color(R, G, B, alphaMult(A, room.far_left.wall_alpha))
gl.ClientActiveTexture(gl.TEXTURE0)
door.TextureData().Bind()
if door.door_glids.floor_buffer != 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.door_glids.floor_buffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.DrawElements(gl.TRIANGLES, door.door_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
}
gl.StencilFunc(gl.NOTEQUAL, 1, 1)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
do_color(255, 255, 255, room.far_left.wall_alpha)
case &right:
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
for _, door := range room.Doors {
if door.Facing != FarRight {
continue
}
door.TextureData().Bind()
R, G, B, A := door.Color()
do_color(R, G, B, alphaMult(A, room.far_right.wall_alpha))
gl.ClientActiveTexture(gl.TEXTURE0)
door.TextureData().Bind()
if door.door_glids.floor_buffer != 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.door_glids.floor_buffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.DrawElements(gl.TRIANGLES, door.door_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
}
gl.StencilFunc(gl.NOTEQUAL, 1, 1)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
do_color(255, 255, 255, room.far_right.wall_alpha)
case &floor:
gl.StencilFunc(gl.ALWAYS, 2, 2)
gl.StencilOp(gl.REPLACE, gl.REPLACE, gl.REPLACE)
do_color(255, 255, 255, 255)
}
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
if los_tex != nil {
los_tex.Bind()
}
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
// Now draw the walls
gl.LoadMatrixf(&floor[0])
plane.texture.Data().Bind()
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, plane.index_buffer)
if (plane.mat == &left || plane.mat == &right) && strings.Contains(string(room.Wall.Path), "gradient.png") {
base.EnableShader("gorey")
base.SetUniformI("gorey", "tex", 0)
base.SetUniformI("gorey", "foo", Foo)
base.SetUniformF("gorey", "num_rows", Num_rows)
base.SetUniformF("gorey", "noise_rate", Noise_rate)
base.SetUniformF("gorey", "num_steps", Num_steps)
}
if plane.mat == &floor && strings.Contains(string(room.Floor.Path), "gradient.png") {
base.EnableShader("gorey")
base.SetUniformI("gorey", "tex", 0)
base.SetUniformI("gorey", "foo", Foo)
base.SetUniformF("gorey", "num_rows", Num_rows)
base.SetUniformF("gorey", "noise_rate", Noise_rate)
base.SetUniformF("gorey", "num_steps", Num_steps)
zexp := math.Log(float64(zoom))
frac := 1 - 1/zexp
frac = (frac - 0.6) * 5.0
switch {
case frac > 0.7:
base.SetUniformI("gorey", "range", 1)
case frac > 0.3:
base.SetUniformI("gorey", "range", 2)
default:
base.SetUniformI("gorey", "range", 3)
}
}
if plane.mat == &floor {
R, G, B, _ := room.Color()
gl.Color4ub(R, G, B, 255)
}
gl.DrawElements(gl.TRIANGLES, gl.Sizei(room.floor_count), gl.UNSIGNED_SHORT, nil)
if los_tex != nil {
base.EnableShader("los")
} else {
base.EnableShader("")
}
}
for _, wt := range room.WallTextures {
if room.wall_texture_gl_map == nil {
room.wall_texture_gl_map = make(map[*WallTexture]wallTextureGlIds)
room.wall_texture_state_map = make(map[*WallTexture]wallTextureState)
}
ids := room.wall_texture_gl_map[wt]
state := room.wall_texture_state_map[wt]
var new_state wallTextureState
new_state.flip = wt.Flip
new_state.rot = wt.Rot
new_state.x = wt.X
new_state.y = wt.Y
new_state.room.x = room.X
new_state.room.y = room.Y
new_state.room.dx = room.Size.Dx
new_state.room.dy = room.Size.Dy
if new_state != state {
wt.setupGlStuff(room.X, room.Y, room.Size.Dx, room.Size.Dy, &ids)
room.wall_texture_gl_map[wt] = ids
room.wall_texture_state_map[wt] = new_state
}
gl.LoadMatrixf(&floor[0])
if ids.vbuffer != 0 {
wt.Texture.Data().Bind()
R, G, B, A := wt.Color()
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, ids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
if ids.floor_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 2, 2)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.floor_buffer)
gl.Color4ub(R, G, B, A)
gl.DrawElements(gl.TRIANGLES, ids.floor_count, gl.UNSIGNED_SHORT, nil)
}
if ids.left_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.left_buffer)
do_color(R, G, B, alphaMult(A, room.far_left.wall_alpha))
gl.DrawElements(gl.TRIANGLES, ids.left_count, gl.UNSIGNED_SHORT, nil)
}
if ids.right_buffer != 0 {
gl.StencilFunc(gl.ALWAYS, 1, 1)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ids.right_buffer)
do_color(R, G, B, alphaMult(A, room.far_right.wall_alpha))
gl.DrawElements(gl.TRIANGLES, ids.right_count, gl.UNSIGNED_SHORT, nil)
}
}
}
base.EnableShader("marble")
base.SetUniformI("marble", "tex2", 1)
base.SetUniformF("marble", "room_x", float32(room.X))
base.SetUniformF("marble", "room_y", float32(room.Y))
for _, door := range room.Doors {
door.setupGlStuff(room)
if door.threshold_glids.vbuffer == 0 {
continue
}
if door.AlwaysOpen() {
continue
}
if door.highlight_threshold {
gl.Color4ub(255, 255, 255, 255)
} else {
gl.Color4ub(128, 128, 128, 255)
}
gl.BindBuffer(gl.ARRAY_BUFFER, door.threshold_glids.vbuffer)
gl.VertexPointer(3, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.x)))
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.u)))
gl.ClientActiveTexture(gl.TEXTURE1)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(unsafe.Sizeof(vert)), gl.Pointer(unsafe.Offsetof(vert.los_u)))
gl.ClientActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, door.threshold_glids.floor_buffer)
gl.DrawElements(gl.TRIANGLES, door.threshold_glids.floor_count, gl.UNSIGNED_SHORT, nil)
}
base.EnableShader("")
if los_tex != nil {
base.EnableShader("")
gl.ActiveTexture(gl.TEXTURE1)
gl.Disable(gl.TEXTURE_2D)
gl.ActiveTexture(gl.TEXTURE0)
gl.ClientActiveTexture(gl.TEXTURE1)
gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
gl.ClientActiveTexture(gl.TEXTURE0)
}
run.Assign(&floor)
mul.Translation(float32(-room.X), float32(-room.Y), 0)
run.Multiply(&mul)
gl.LoadMatrixf(&run[0])
gl.StencilFunc(gl.EQUAL, 2, 3)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
room_rect := image.Rect(room.X, room.Y, room.X+room.Size.Dx, room.Y+room.Size.Dy)
for _, fd := range floor_drawers {
x, y := fd.Pos()
dx, dy := fd.Dims()
if room_rect.Overlaps(image.Rect(x, y, x+dx, y+dy)) {
fd.RenderOnFloor()
}
}
do_color(255, 255, 255, 255)
gl.LoadIdentity()
gl.Disable(gl.STENCIL_TEST)
room.renderFurniture(floor, 255, drawables, los_tex)
gl.ClientActiveTexture(gl.TEXTURE1)
gl.Disable(gl.TEXTURE_2D)
gl.ClientActiveTexture(gl.TEXTURE0)
base.EnableShader("")
}
func (wt *WallTexture) setupGlStuff(x, y, dx, dy int, gl_ids *wallTextureGlIds) {
if gl_ids.vbuffer != 0 {
gl.DeleteBuffers(1, &gl_ids.vbuffer)
gl.DeleteBuffers(1, &gl_ids.left_buffer)
gl.DeleteBuffers(1, &gl_ids.right_buffer)
gl.DeleteBuffers(1, &gl_ids.floor_buffer)
gl_ids.vbuffer = 0
gl_ids.left_buffer = 0
gl_ids.right_buffer = 0
gl_ids.floor_buffer = 0
}
// All vertices for both walls and the floor will go here and get sent to
// opengl all at once
var vs []roomVertex
// Conveniently casted values
frx := float32(x)
fry := float32(y)
frdx := float32(dx)
frdy := float32(dy)
tdx := float32(wt.Texture.Data().Dx()) / 100
tdy := float32(wt.Texture.Data().Dy()) / 100
wtx := wt.X
wty := wt.Y
wtr := wt.Rot
if wtx > frdx {
wtr -= 3.1415926535 / 2
}
// Floor
verts := []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
var m, run mathgl.Mat3
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p := mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, 0}, B: mathgl.Vec2{0, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, frdy}, B: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, frdy}, B: mathgl.Vec2{frdx, 0}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, 0}, B: mathgl.Vec2{0, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, &gl_ids.floor_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl_ids.floor_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.floor_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: p[i].X,
y: p[i].Y,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + p[i].Y) / LosTextureSize,
los_v: (frx + p[i].X) / LosTextureSize,
})
}
}
// Left Wall
verts = []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p = mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, 0}, B: mathgl.Vec2{0, frdy}})
p.Clip(&mathgl.Seg2{B: mathgl.Vec2{0, frdy}, A: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, frdy}, B: mathgl.Vec2{frdx, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, &gl_ids.left_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl_ids.left_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.left_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: p[i].X,
y: frdy,
z: frdy - p[i].Y,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + frdy - 0.5) / LosTextureSize,
los_v: (frx + p[i].X) / LosTextureSize,
})
}
}
// Right Wall
verts = []mathgl.Vec2{
{-tdx / 2, -tdy / 2},
{-tdx / 2, tdy / 2},
{tdx / 2, tdy / 2},
{tdx / 2, -tdy / 2},
}
run.Identity()
m.Translation(wtx, wty)
run.Multiply(&m)
m.RotationZ(wtr)
run.Multiply(&m)
if wt.Flip {
m.Scaling(-1, 1)
run.Multiply(&m)
}
for i := range verts {
verts[i].Transform(&run)
}
p = mathgl.Poly(verts)
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{0, frdy}, B: mathgl.Vec2{frdx, frdy}})
p.Clip(&mathgl.Seg2{B: mathgl.Vec2{frdx, frdy}, A: mathgl.Vec2{frdx, 0}})
p.Clip(&mathgl.Seg2{A: mathgl.Vec2{frdx, 0}, B: mathgl.Vec2{0, 0}})
if len(p) >= 3 {
// floor indices
var is []uint16
for i := 1; i < len(p)-1; i++ {
is = append(is, uint16(len(vs)+0))
is = append(is, uint16(len(vs)+i))
is = append(is, uint16(len(vs)+i+1))
}
gl.GenBuffers(1, &gl_ids.right_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl_ids.right_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
gl_ids.right_count = gl.Sizei(len(is))
run.Inverse()
for i := range p {
v := mathgl.Vec2{p[i].X, p[i].Y}
v.Transform(&run)
vs = append(vs, roomVertex{
x: frdx,
y: p[i].Y,
z: frdx - p[i].X,
u: v.X/tdx + 0.5,
v: -(v.Y/tdy + 0.5),
los_u: (fry + p[i].Y) / LosTextureSize,
los_v: (frx + frdx - 0.5) / LosTextureSize,
})
}
}
if len(vs) > 0 {
gl.GenBuffers(1, &gl_ids.vbuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, gl_ids.vbuffer)
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
}
}
func (d *Door) setupGlStuff(room *Room) {
var state doorState
state.facing = d.Facing
state.pos = d.Pos
state.room.x = room.X
state.room.y = room.Y
state.room.dx = room.roomDef.Size.Dx
state.room.dy = room.roomDef.Size.Dy
if state == d.state {
return
}
if d.TextureData().Dy() == 0 {
// Can't build this data until the texture is loaded, so we'll have to try
// again later.
return
}
d.state = state
if d.threshold_glids.vbuffer != 0 {
gl.DeleteBuffers(1, &d.threshold_glids.vbuffer)
gl.DeleteBuffers(1, &d.threshold_glids.floor_buffer)
d.threshold_glids.vbuffer = 0
d.threshold_glids.floor_buffer = 0
}
if d.door_glids.vbuffer != 0 {
gl.DeleteBuffers(1, &d.door_glids.vbuffer)
gl.DeleteBuffers(1, &d.door_glids.floor_buffer)
d.door_glids.vbuffer = 0
d.door_glids.floor_buffer = 0
}
// far left, near right, do threshold
// near left, far right, do threshold
// far left, far right, do door
var vs []roomVertex
if d.Facing == FarLeft || d.Facing == NearRight {
x1 := float32(d.Pos)
x2 := float32(d.Pos + d.Width)
var y1 float32 = -0.25
var y2 float32 = 0.25
if d.Facing == FarLeft {
y1 = float32(room.roomDef.Size.Dy)
y2 = float32(room.roomDef.Size.Dy) - 0.25
}
// los_x1 := (x1 + float32(room.X)) / LosTextureSize
vs = append(vs, roomVertex{x: x1, y: y1})
vs = append(vs, roomVertex{x: x1, y: y2})
vs = append(vs, roomVertex{x: x2, y: y2})
vs = append(vs, roomVertex{x: x2, y: y1})
for i := 0; i < 4; i++ {
vs[i].los_u = (y2 + float32(room.Y)) / LosTextureSize
vs[i].los_v = (vs[i].x + float32(room.X)) / LosTextureSize
}
}
if d.Facing == FarRight || d.Facing == NearLeft {
y1 := float32(d.Pos)
y2 := float32(d.Pos + d.Width)
var x1 float32 = -0.25
var x2 float32 = 0.25
if d.Facing == FarRight {
x1 = float32(room.roomDef.Size.Dx)
x2 = float32(room.roomDef.Size.Dx) - 0.25
}
// los_y1 := (y1 + float32(room.Y)) / LosTextureSize
vs = append(vs, roomVertex{x: x1, y: y1})
vs = append(vs, roomVertex{x: x1, y: y2})
vs = append(vs, roomVertex{x: x2, y: y2})
vs = append(vs, roomVertex{x: x2, y: y1})
for i := 0; i < 4; i++ {
vs[i].los_u = (vs[i].y + float32(room.Y)) / LosTextureSize
vs[i].los_v = (x2 + float32(room.X)) / LosTextureSize
}
}
dz := -float32(d.Width*d.TextureData().Dy()) / float32(d.TextureData().Dx())
if d.Facing == FarRight {
x := float32(room.roomDef.Size.Dx)
y1 := float32(d.Pos + d.Width)
y2 := float32(d.Pos)
los_v := (float32(room.X) + x - 0.5) / LosTextureSize
los_u1 := (float32(room.Y) + y1) / LosTextureSize
los_u2 := (float32(room.Y) + y2) / LosTextureSize
vs = append(vs, roomVertex{
x: x, y: y1, z: 0,
u: 0, v: 1,
los_u: los_u1,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y1, z: dz,
u: 0, v: 0,
los_u: los_u1,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y2, z: dz,
u: 1, v: 0,
los_u: los_u2,
los_v: los_v,
})
vs = append(vs, roomVertex{
x: x, y: y2, z: 0,
u: 1, v: 1,
los_u: los_u2,
los_v: los_v,
})
}
if d.Facing == FarLeft {
x1 := float32(d.Pos)
x2 := float32(d.Pos + d.Width)
y := float32(room.roomDef.Size.Dy)
los_v1 := (float32(room.X) + x1) / LosTextureSize
los_v2 := (float32(room.X) + x2) / LosTextureSize
los_u := (float32(room.Y) + y - 0.5) / LosTextureSize
vs = append(vs, roomVertex{
x: x1, y: y, z: 0,
u: 0, v: 1,
los_u: los_u,
los_v: los_v1,
})
vs = append(vs, roomVertex{
x: x1, y: y, z: dz,
u: 0, v: 0,
los_u: los_u,
los_v: los_v1,
})
vs = append(vs, roomVertex{
x: x2, y: y, z: dz,
u: 1, v: 0,
los_u: los_u,
los_v: los_v2,
})
vs = append(vs, roomVertex{
x: x2, y: y, z: 0,
u: 1, v: 1,
los_u: los_u,
los_v: los_v2,
})
}
gl.GenBuffers(1, &d.threshold_glids.vbuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, d.threshold_glids.vbuffer)
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
is := []uint16{0, 1, 2, 0, 2, 3}
gl.GenBuffers(1, &d.threshold_glids.floor_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, d.threshold_glids.floor_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
d.threshold_glids.floor_count = 6
if d.Facing == FarLeft || d.Facing == FarRight {
is2 := []uint16{4, 5, 6, 4, 6, 7}
gl.GenBuffers(1, &d.door_glids.floor_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, d.door_glids.floor_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is2)), gl.Pointer(&is2[0]), gl.STATIC_DRAW)
d.door_glids.floor_count = 6
}
}
func handleLoadRequest(req loadRequest) {
f, _ := os.Open(req.path)
im, _, err := image.Decode(f)
f.Close()
if err != nil {
return
}
gray := true
dx := im.Bounds().Dx()
dy := im.Bounds().Dy()
for i := 0; i < dx; i++ {
for j := 0; j < dy; j++ {
r, g, b, _ := im.At(i, j).RGBA()
if r != g || g != b {
gray = false
break
}
}
if !gray {
break
}
}
var canvas draw.Image
var pix []byte
if gray {
ga := NewGrayAlpha(im.Bounds())
pix = ga.Pix
canvas = ga
} else {
pix = memory.GetBlock(4 * req.data.dx * req.data.dy)
canvas = &image.RGBA{pix, 4 * req.data.dx, im.Bounds()}
}
draw.Draw(canvas, im.Bounds(), im, image.Point{}, draw.Src)
load_mutex.Lock()
load_count += len(pix)
manual_unlock := false
// This prevents us from trying to send too much to opengl in a single
// frame. If we go over the threshold then we hold the lock until we're
// done sending data to opengl, then other requests will be free to
// queue up and they will run on the next frame.
if load_count < load_threshold {
load_mutex.Unlock()
} else {
manual_unlock = true
}
render.Queue(func() {
{
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, (*gl.Uint)(&req.data.texture))
gl.BindTexture(gl.TEXTURE_2D, req.data.texture)
gl.PixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
}
if gray {
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.LUMINANCE_ALPHA,
gl.Sizei(req.data.dx),
gl.Sizei(req.data.dy),
0,
gl.LUMINANCE_ALPHA,
gl.BYTE,
gl.Pointer(&pix[0]))
} else {
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.RGBA,
gl.Sizei(req.data.dx),
gl.Sizei(req.data.dy),
0,
gl.RGBA,
gl.UNSIGNED_BYTE,
gl.Pointer(&pix[0]))
// gl.TexImage2D(target, level, internalformat, width, height, border, format, type_, pixels)
// glu.Build2DMipmaps(gl.TEXTURE_2D, gl.RGBA, req.data.dx, req.data.dy, gl.RGBA, pix)
}
memory.FreeBlock(pix)
if manual_unlock {
load_count = 0
load_mutex.Unlock()
}
})
}
func (room *Room) setupGlStuff() {
if room.X == room.gl.x &&
room.Y == room.gl.y &&
room.Size.Dx == room.gl.dx &&
room.Size.Dy == room.gl.dy &&
room.Wall.Data().Dx() == room.gl.wall_tex_dx &&
room.Wall.Data().Dy() == room.gl.wall_tex_dy {
return
}
room.gl.x = room.X
room.gl.y = room.Y
room.gl.dx = room.Size.Dx
room.gl.dy = room.Size.Dy
room.gl.wall_tex_dx = room.Wall.Data().Dx()
room.gl.wall_tex_dy = room.Wall.Data().Dy()
if room.vbuffer != 0 {
gl.DeleteBuffers(1, &room.vbuffer)
gl.DeleteBuffers(1, &room.left_buffer)
gl.DeleteBuffers(1, &room.right_buffer)
gl.DeleteBuffers(1, &room.floor_buffer)
}
dx := float32(room.Size.Dx)
dy := float32(room.Size.Dy)
var dz float32
if room.Wall.Data().Dx() > 0 {
dz = -float32(room.Wall.Data().Dy()*(room.Size.Dx+room.Size.Dy)) / float32(room.Wall.Data().Dx())
}
// Conveniently casted values
frx := float32(room.X)
fry := float32(room.Y)
frdx := float32(room.Size.Dx)
frdy := float32(room.Size.Dy)
// c is the u-texcoord of the corner of the room
c := frdx / (frdx + frdy)
// lt_llx := frx / LosTextureSize
// lt_lly := fry / LosTextureSize
// lt_urx := (frx + frdx) / LosTextureSize
// lt_ury := (fry + frdy) / LosTextureSize
lt_llx_ep := (frx + 0.5) / LosTextureSize
lt_lly_ep := (fry + 0.5) / LosTextureSize
lt_urx_ep := (frx + frdx - 0.5) / LosTextureSize
lt_ury_ep := (fry + frdy - 0.5) / LosTextureSize
vs := []roomVertex{
// Walls
{0, dy, 0, 0, 1, lt_ury_ep, lt_llx_ep},
{dx, dy, 0, c, 1, lt_ury_ep, lt_urx_ep},
{dx, 0, 0, 1, 1, lt_lly_ep, lt_urx_ep},
{0, dy, dz, 0, 0, lt_ury_ep, lt_llx_ep},
{dx, dy, dz, c, 0, lt_ury_ep, lt_urx_ep},
{dx, 0, dz, 1, 0, lt_lly_ep, lt_urx_ep},
// Floor
// This is the bulk of the floor, containing all but the outer edges of
// the room. los_tex can map directly onto this so we don't need to do
// anything weird here.
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{0, 0.5, 0, 0, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0, dy - 0.5, 0, 0, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0, 0, 0.5 / dx, 1, lt_lly_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0, 0, 1 - 0.5/dx, 1, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx, dy - 0.5, 0, 1, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx, 0.5, 0, 1, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0.5, dy, 0, 0.5 / dx, 0, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy, 0, 1 - 0.5/dx, 0, lt_ury_ep, lt_urx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{0, 0, 0, 0, 1, lt_lly_ep, lt_llx_ep},
{0, 0.5, 0, 0, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0.5, 0, 0.5 / dx, 1 - 0.5/dy, lt_lly_ep, lt_llx_ep},
{0.5, 0, 0, 0.5 / dx, 1, lt_lly_ep, lt_llx_ep},
{0, dy - 0.5, 0, 0, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{0, dy, 0, 0, 0, lt_ury_ep, lt_llx_ep},
{0.5, dy, 0, 0.5 / dx, 0, lt_ury_ep, lt_llx_ep},
{0.5, dy - 0.5, 0, 0.5 / dx, 0.5 / dy, lt_ury_ep, lt_llx_ep},
{dx - 0.5, dy - 0.5, 0, 1 - 0.5/dx, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, dy, 0, 1 - 0.5/dx, 0, lt_ury_ep, lt_urx_ep},
{dx, dy, 0, 1, 0, lt_ury_ep, lt_urx_ep},
{dx, dy - 0.5, 0, 1, 0.5 / dy, lt_ury_ep, lt_urx_ep},
{dx - 0.5, 0, 0, 1 - 0.5/dx, 1, lt_lly_ep, lt_urx_ep},
{dx - 0.5, 0.5, 0, 1 - 0.5/dx, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx, 0.5, 0, 1, 1 - 0.5/dy, lt_lly_ep, lt_urx_ep},
{dx, 0, 0, 1, 1, lt_lly_ep, lt_urx_ep},
}
gl.GenBuffers(1, &room.vbuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, room.vbuffer)
size := int(unsafe.Sizeof(roomVertex{}))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(size*len(vs)), gl.Pointer(&vs[0].x), gl.STATIC_DRAW)
// left wall indices
is := []uint16{0, 3, 4, 0, 4, 1}
gl.GenBuffers(1, &room.left_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, room.left_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
// right wall indices
is = []uint16{1, 4, 5, 1, 5, 2}
gl.GenBuffers(1, &room.right_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, room.right_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
// floor indices
is = []uint16{
6, 7, 8, 6, 8, 9, // middle
10, 11, 12, 10, 12, 13, // left side
14, 15, 16, 14, 16, 17, // bottom side
18, 19, 20, 18, 20, 21, // right side
22, 23, 24, 22, 24, 25, // top side
26, 27, 28, 26, 28, 29, // bottom left corner
30, 31, 32, 30, 32, 33, // upper left corner
34, 35, 36, 34, 36, 37, // upper right corner
38, 39, 40, 38, 40, 41, // lower right corner
}
gl.GenBuffers(1, &room.floor_buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, room.floor_buffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(is[0]))*len(is)), gl.Pointer(&is[0]), gl.STATIC_DRAW)
room.floor_count = len(is)
}