func main() {
if !glfw.Init() {
log.Fatal("glfw failed to initialize")
}
defer glfw.Terminate()
window, err := glfw.CreateWindow(640, 480, "Deformable", nil, nil)
if err != nil {
log.Fatal(err.Error())
}
window.MakeContextCurrent()
glfw.SwapInterval(1)
window.SetMouseButtonCallback(handleMouseButton)
window.SetKeyCallback(handleKeyDown)
window.SetInputMode(glfw.Cursor, glfw.CursorHidden)
gl.Init()
initGL()
i := 16
m = GenerateMap(1600/i, 1200/i, i)
for running && !window.ShouldClose() {
x, y := window.GetCursorPosition()
if drawing != 0 {
m.Add(int(x)+int(camera[0]), int(y)+int(camera[1]), drawing, brushSizes[currentBrushSize])
}
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.LoadIdentity()
gl.PushMatrix()
gl.PushAttrib(gl.CURRENT_BIT | gl.ENABLE_BIT | gl.LIGHTING_BIT | gl.POLYGON_BIT | gl.LINE_BIT)
gl.Translatef(-camera[0], -camera[1], 0)
m.Draw()
gl.PopAttrib()
gl.PopMatrix()
gl.PushAttrib(gl.COLOR_BUFFER_BIT)
gl.LineWidth(2)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.ONE_MINUS_DST_COLOR, gl.ZERO)
// gl.Enable(gl.LINE_SMOOTH)
// gl.Hint(gl.LINE_SMOOTH_HINT, gl.NICEST)
gl.Translatef(float32(x), float32(y), 0)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.VertexPointer(2, gl.DOUBLE, 0, cursorVerts)
gl.DrawArrays(gl.LINE_LOOP, 0, 24)
gl.PopAttrib()
window.SwapBuffers()
glfw.PollEvents()
}
}
func (m *Map) Draw() {
gl.PushMatrix()
gl.PushAttrib(gl.CURRENT_BIT | gl.ENABLE_BIT | gl.LIGHTING_BIT | gl.POLYGON_BIT | gl.LINE_BIT)
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.VertexPointer(3, gl.FLOAT, 0, m.vertices)
gl.EnableClientState(gl.NORMAL_ARRAY)
gl.NormalPointer(gl.FLOAT, 0, m.normals)
// gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
// gl.TexCoordPointer(2, gl.FLOAT, 0, m.texcoords)
gl.EnableClientState(gl.COLOR_ARRAY)
gl.ColorPointer(3, gl.FLOAT, 0, m.colors)
// draw solids
gl.Enable(gl.COLOR_MATERIAL)
// gl.DrawArrays(gl.TRIANGLE_STRIP, 0, len(m.vertices)/3)
gl.PolygonMode(gl.FRONT_AND_BACK, gl.LINE)
gl.LineWidth(1.0)
gl.Color4f(1, 1, 1, 1)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, len(m.vertices)/3)
gl.PopAttrib()
gl.PopMatrix()
}
// Commit creates the actual texture from the atlas image data.
// This should be called after all regions have been defined and set,
// and before you start using the texture for display.
func (a *TextureAtlas) Commit(target gl.GLenum) {
gl.PushAttrib(gl.CURRENT_BIT | gl.ENABLE_BIT)
gl.Enable(target)
a.texture.Bind(target)
gl.TexParameteri(target, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(target, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(target, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(target, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
switch a.depth {
case 4:
gl.TexImage2D(target, 0, gl.RGBA, a.width, a.height,
0, gl.RGBA, gl.UNSIGNED_BYTE, a.data)
case 3:
gl.TexImage2D(target, 0, gl.RGB, a.width, a.height,
0, gl.RGB, gl.UNSIGNED_BYTE, a.data)
case 1:
gl.TexImage2D(target, 0, gl.ALPHA, a.width, a.height,
0, gl.ALPHA, gl.UNSIGNED_BYTE, a.data)
}
gl.PopAttrib()
}
func (r *RenderTarget) pushGlStates() {
gl.PushClientAttrib(gl.CLIENT_ALL_ATTRIB_BITS)
gl.PushAttrib(gl.ALL_ATTRIB_BITS)
gl.MatrixMode(gl.MODELVIEW)
gl.PushMatrix()
gl.MatrixMode(gl.PROJECTION)
gl.PushMatrix()
gl.MatrixMode(gl.TEXTURE)
gl.PushMatrix()
r.resetGlStates()
}
func (b Texture) Enter() {
gl.PushAttrib(gl.ENABLE_BIT)
gl.Enable(gl.TEXTURE_2D)
b.Bind(gl.TEXTURE_2D)
}
// Printf draws the given string at the specified coordinates.
// It expects the string to be a single line. Line breaks are not
// handled as line breaks and are rendered as glyphs.
//
// In order to render multi-line text, it is up to the caller to split
// the text up into individual lines of adequate length and then call
// this method for each line seperately.
func (f *Font) Printf(x, y float32, fs string, argv ...interface{}) error {
indices := []rune(fmt.Sprintf(fs, argv...))
if len(indices) == 0 {
return nil
}
// Runes form display list indices.
// For this purpose, they need to be offset by -FontConfig.Low
low := f.Config.Low
for i := range indices {
indices[i] -= low
}
var vp [4]int32
gl.GetIntegerv(gl.VIEWPORT, vp[:])
gl.PushAttrib(gl.TRANSFORM_BIT)
gl.MatrixMode(gl.PROJECTION)
gl.PushMatrix()
gl.LoadIdentity()
gl.Ortho(float64(vp[0]), float64(vp[2]), float64(vp[1]), float64(vp[3]), 0, 1)
gl.PopAttrib()
gl.PushAttrib(gl.LIST_BIT | gl.CURRENT_BIT | gl.ENABLE_BIT | gl.TRANSFORM_BIT)
{
gl.MatrixMode(gl.MODELVIEW)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.DEPTH_TEST)
gl.Enable(gl.BLEND)
gl.Enable(gl.TEXTURE_2D)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
f.Texture.Bind(gl.TEXTURE_2D)
var mv [16]float32
gl.GetFloatv(gl.MODELVIEW_MATRIX, mv[:])
gl.PushMatrix()
{
gl.LoadIdentity()
mgw := float32(f.maxGlyphWidth)
mgh := float32(f.maxGlyphHeight)
switch f.Config.Dir {
case LeftToRight, TopToBottom:
gl.Translatef(x, float32(vp[3])-y-mgh, 0)
case RightToLeft:
gl.Translatef(x-mgw, float32(vp[3])-y-mgh, 0)
}
gl.MultMatrixf(&mv)
gl.CallLists(len(indices), gl.UNSIGNED_INT, indices)
}
gl.PopMatrix()
f.Texture.Unbind(gl.TEXTURE_2D)
}
gl.PopAttrib()
gl.PushAttrib(gl.TRANSFORM_BIT)
gl.MatrixMode(gl.PROJECTION)
gl.PopMatrix()
gl.PopAttrib()
return glh.CheckGLError()
}
// Render renders the LEM1802 contents.
func (d *LEM1802Display) Render() {
var tex [4]float32
var addr, x, y int
var fg, bg, blink, char byte
mem := d.dev.Buffer()
if len(mem) == 0 {
return
}
palette := d.dev.Palette()
border := d.dev.Border()
clr_ut := d.quads_ut.Colors().Data().([]byte)
clr_t := d.quads_t.Colors().Data().([]byte)
tex_t := d.quads_t.TexCoords().Data().([]float32)
// Set background/border color.
r, g, b := lem1802.RGB(palette[border])
setColor(clr_ut, r, g, b)
clr_ut = clr_ut[12:]
for y = 0; y < lem1802.CellsPerCol; y++ {
for x = 0; x < lem1802.CellsPerRow; x++ {
fg, bg, blink, char = lem1802.Decode(mem[addr])
addr++
// Swap foreground and background colours if this
// character has the blink bit set, and the current
// blink state is 1.
if blink == 1 && atomic.LoadUint32(&d.blinkState) == 1 {
fg = bg
}
// Update glyph background color.
r, g, b := lem1802.RGB(palette[bg])
setColor(clr_ut, r, g, b)
clr_ut = clr_ut[12:]
// Update glyph foreground color and tex coords.
r, g, b = lem1802.RGB(palette[fg])
setColor(clr_t, r, g, b)
clr_t = clr_t[12:]
tex = d.glyphs[char]
tex_t[0] = tex[0]
tex_t[1] = tex[1]
tex_t[2] = tex[2]
tex_t[3] = tex[1]
tex_t[4] = tex[2]
tex_t[5] = tex[3]
tex_t[6] = tex[0]
tex_t[7] = tex[3]
tex_t = tex_t[8:]
}
}
// Ensure these buffers are re-comitted to the GPU,
// because we have just changed their contents.
d.quads_ut.Colors().Invalidate()
d.quads_t.Colors().Invalidate()
d.quads_t.TexCoords().Invalidate()
gl.PushAttrib(gl.ENABLE_BIT)
{
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.TEXTURE_2D)
gl.Enable(gl.COLOR_MATERIAL)
gl.Enable(gl.BLEND)
gl.LoadIdentity()
// Render border and glyph backgrounds.
d.quads_ut.Render(gl.QUADS)
// Render glyphs.
gl.Enable(gl.TEXTURE_2D)
d.atlas.Bind(gl.TEXTURE_2D)
d.quads_t.Render(gl.QUADS)
d.atlas.Unbind(gl.TEXTURE_2D)
}
gl.PopAttrib()
}
func (a Attrib) Enter() {
gl.PushAttrib(a.Bits)
}
func (m Matrix) Enter() {
gl.PushAttrib(gl.TRANSFORM_BIT)
gl.MatrixMode(m.Type)
gl.PushMatrix()
}
func (e _disable) Enter() {
gl.PushAttrib(gl.ENABLE_BIT)
for _, item := range e.enums {
gl.Disable(item)
}
}