func NewGameState(window *sdl.Window, world *World) (gamestate *GameState) {
gl.ClearColor(0., 0., 0.4, 0.0)
gl.Enable(gl.DEPTH_TEST)
bar := tw.NewBar("TweakBar")
gamestate = &GameState{
Window: window,
Camera: nil,
Bar: bar,
World: world,
Fps: 0,
Options: settings.BoolOptions{},
}
opt := &gamestate.Options
opt.Load()
gamestate.Camera = gamestate.World.Player.GetCamera()
tw.Define(" GLOBAL help='This example shows how to integrate AntTweakBar with SDL2 and OpenGL.' ")
bar.AddVarRO("fps", tw.TYPE_FLOAT, unsafe.Pointer(&gamestate.Fps), "")
opt.CreateGui(bar)
for i, portal := range gamestate.World.KdTree {
ptr := &(portal.(*Portal).Orientation)
bar.AddVarRW(fmt.Sprintf("Rotation %d", i), tw.TYPE_QUAT4F, unsafe.Pointer(ptr), "")
}
//window.GetSize(w, h)
w, h := window.GetSize()
tw.WindowSize(w, h)
return
}
func initGL() (err error) {
gl.Init()
gl.ShadeModel(gl.SMOOTH)
gl.ClearColor(0, 0, 0, 0)
gl.ClearDepth(1)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Hint(gl.PERSPECTIVE_CORRECTION_HINT, gl.NICEST)
gl.DepthFunc(gl.NEVER)
gl.Enable(gl.BLEND)
gl.DepthMask(true)
//loadShader()
return
}
func (v *Video) initGL() {
if gl.Init() != 0 {
panic(sdl.GetError())
}
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
v.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
posAttrib := v.prog.GetAttribLocation("vPosition")
texCoordAttr := v.prog.GetAttribLocation("vTexCoord")
v.textureUni = v.prog.GetAttribLocation("texture")
v.texture = gl.GenTexture()
gl.ActiveTexture(gl.TEXTURE0)
v.texture.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
v.prog.Use()
posAttrib.EnableArray()
texCoordAttr.EnableArray()
vertVBO := gl.GenBuffer()
vertVBO.Bind(gl.ARRAY_BUFFER)
verts := []float32{-1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0}
gl.BufferData(gl.ARRAY_BUFFER, len(verts)*int(unsafe.Sizeof(verts[0])), &verts[0], gl.STATIC_DRAW)
textCoorBuf := gl.GenBuffer()
textCoorBuf.Bind(gl.ARRAY_BUFFER)
texVerts := []float32{0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0}
gl.BufferData(gl.ARRAY_BUFFER, len(texVerts)*int(unsafe.Sizeof(texVerts[0])), &texVerts[0], gl.STATIC_DRAW)
posAttrib.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
texCoordAttr.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
}
func (c *Camera) Clear() {
gl.ClearColor(gl.GLclampf(c.clearColor.R), gl.GLclampf(c.clearColor.G), gl.GLclampf(c.clearColor.B), gl.GLclampf(c.clearColor.A))
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
}