// Start starts the renderer
func Start() {
if os.Getenv("STEVEN_DEBUG") == "true" {
gl.DebugLog()
}
gl.Enable(gl.DepthTest)
gl.Enable(gl.CullFaceFlag)
gl.CullFace(gl.Back)
gl.FrontFace(gl.ClockWise)
chunkProgram = CreateProgram(
glsl.Get("chunk_vertex"),
glsl.Get("chunk_frag"),
)
shaderChunk = &chunkShader{}
InitStruct(shaderChunk, chunkProgram)
chunkProgramT = CreateProgram(
glsl.Get("chunk_vertex"),
glsl.Get("chunk_frag", "alpha"),
)
shaderChunkT = &chunkShader{}
InitStruct(shaderChunkT, chunkProgramT)
initUI()
initLineDraw()
initModels()
clouds.init()
gl.BlendFunc(gl.SrcAlpha, gl.OneMinusSrcAlpha)
elementBuffer = gl.CreateBuffer()
}
func initUI() {
uiState.program = CreateProgram(glsl.Get("ui_vertex"), glsl.Get("ui_frag"))
uiState.shader = &uiShader{}
InitStruct(uiState.shader, uiState.program)
uiState.array = gl.CreateVertexArray()
uiState.array.Bind()
uiState.buffer = gl.CreateBuffer()
uiState.buffer.Bind(gl.ArrayBuffer)
uiState.shader.Position.Enable()
uiState.shader.TextureInfo.Enable()
uiState.shader.TextureOffset.Enable()
uiState.shader.Color.Enable()
uiState.shader.Position.PointerInt(3, gl.Short, 28, 0)
uiState.shader.TextureInfo.Pointer(4, gl.UnsignedShort, false, 28, 8)
uiState.shader.TextureOffset.PointerInt(3, gl.Short, 28, 16)
uiState.shader.Color.Pointer(4, gl.UnsignedByte, true, 28, 24)
uiState.indexBuffer = gl.CreateBuffer()
uiState.indexBuffer.Bind(gl.ElementArrayBuffer)
}
func initModels() {
c := &ModelCollection{
blendS: gl.SrcAlpha,
blendD: gl.OneMinusSrcAlpha,
}
c.program = CreateProgram(glsl.Get("model_vertex"), glsl.Get("model_frag"))
c.shader = &modelShader{}
InitStruct(c.shader, c.program)
modelState.baseCollection = c
modelState.models = append(modelState.models, c)
SunModels = &ModelCollection{
blendS: gl.SrcAlpha,
blendD: gl.OneFactor,
}
SunModels.program = CreateProgram(glsl.Get("sun_vertex"), glsl.Get("sun_frag"))
SunModels.shader = &modelShader{}
InitStruct(SunModels.shader, SunModels.program)
modelState.models = append(modelState.models, SunModels)
modelState.indexBuffer = gl.CreateBuffer()
}
func (c *cloudState) init() {
program := gl.CreateProgram()
v := gl.CreateShader(gl.VertexShader)
v.Source(glsl.Get("cloud_vertex"))
v.Compile()
if v.Parameter(gl.CompileStatus) == 0 {
panic(v.InfoLog())
} else {
log := v.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
g := gl.CreateShader(gl.GeometryShader)
g.Source(glsl.Get("cloud_geo"))
g.Compile()
if g.Parameter(gl.CompileStatus) == 0 {
panic(g.InfoLog())
} else {
log := g.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
f := gl.CreateShader(gl.FragmentShader)
f.Source(glsl.Get("cloud_fragment"))
f.Compile()
if f.Parameter(gl.CompileStatus) == 0 {
panic(f.InfoLog())
} else {
log := f.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
program.AttachShader(v)
program.AttachShader(g)
program.AttachShader(f)
program.Link()
program.Use()
c.program = program
InitStruct(&c.shader, c.program)
c.array = gl.CreateVertexArray()
c.array.Bind()
c.buffer = gl.CreateBuffer()
c.buffer.Bind(gl.ArrayBuffer)
c.shader.Position.Enable()
c.shader.Position.Pointer(3, gl.Float, false, 12, 0)
data := builder.New(builder.Float, builder.Float, builder.Float)
for x := -160; x < 160; x++ {
for y := -160; y < 160; y++ {
data.Float(float32(x))
data.Float(128)
data.Float(float32(y))
c.numPoints++
}
}
c.buffer.Data(data.Data(), gl.StaticDraw)
c.texture = gl.CreateTexture()
c.texture.Bind(gl.Texture2D)
c.texture.Image2D(0, 512, 512, gl.Red, gl.UnsignedByte, c.data)
c.texture.Parameter(gl.TextureMinFilter, gl.Nearest)
c.texture.Parameter(gl.TextureMagFilter, gl.Nearest)
}