// initScene is one time initialization that creates a single VAO
func (tb *tbtag) initScene() {
tb.mvp32 = &render.M4{}
tb.initData()
// Bind the OpenGL calls and dump some version info.
gl.Init()
fmt.Printf("%s %s", gl.GetString(gl.RENDERER), gl.GetString(gl.VERSION))
fmt.Printf(" GLSL %s\n", gl.GetString(gl.SHADING_LANGUAGE_VERSION))
// Gather the one scene into this one vertex array object.
gl.GenVertexArrays(1, &tb.vao)
gl.BindVertexArray(tb.vao)
// vertex data.
var vbuff uint32
gl.GenBuffers(1, &vbuff)
gl.BindBuffer(gl.ARRAY_BUFFER, vbuff)
gl.BufferData(gl.ARRAY_BUFFER, int64(len(tb.points)*4), gl.Pointer(&(tb.points[0])), gl.STATIC_DRAW)
var vattr uint32 = 0
gl.VertexAttribPointer(vattr, 4, gl.FLOAT, false, 0, 0)
gl.EnableVertexAttribArray(vattr)
// texture coordatinates
var tbuff uint32
gl.GenBuffers(1, &tbuff)
gl.BindBuffer(gl.ARRAY_BUFFER, tbuff)
gl.BufferData(gl.ARRAY_BUFFER, int64(len(tb.tcoords)*4), gl.Pointer(&(tb.tcoords[0])), gl.STATIC_DRAW)
var tattr uint32 = 2
gl.VertexAttribPointer(tattr, 2, gl.FLOAT, false, 0, 0)
gl.EnableVertexAttribArray(tattr)
// faces data.
var ebuff uint32
gl.GenBuffers(1, &ebuff)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebuff)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, int64(len(tb.faces)), gl.Pointer(&(tb.faces[0])), gl.STATIC_DRAW)
// create texture and shaders after all the data has been set up.
tb.initTexture()
tb.initShader()
tb.ortho = lin.NewOrtho(0, 4, 0, 4, 0, 10)
// set some state that doesn't need to change during drawing.
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Enable(gl.DEPTH_TEST)
gl.Enable(gl.TEXTURE_2D)
}
// initScene is one time initialization that creates a single VAO
func (sf *sftag) initScene() {
sf.mvp32 = &render.M4{}
sf.sTime = time.Now()
sf.initData()
// Bind the OpenGL calls and dump some version info.
gl.Init()
fmt.Printf("%s %s", gl.GetString(gl.RENDERER), gl.GetString(gl.VERSION))
fmt.Printf(" GLSL %s\n", gl.GetString(gl.SHADING_LANGUAGE_VERSION))
gl.GenVertexArrays(1, &sf.vao)
gl.BindVertexArray(sf.vao)
// vertex data.
var vbuff uint32
gl.GenBuffers(1, &vbuff)
gl.BindBuffer(gl.ARRAY_BUFFER, vbuff)
gl.BufferData(gl.ARRAY_BUFFER, int64(len(sf.points)*4), gl.Pointer(&(sf.points[0])), gl.STATIC_DRAW)
var vattr uint32 = 0
gl.VertexAttribPointer(vattr, 4, gl.FLOAT, false, 0, 0)
gl.EnableVertexAttribArray(vattr)
// faces data.
var ebuff uint32
gl.GenBuffers(1, &ebuff)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebuff)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, int64(len(sf.faces)), gl.Pointer(&(sf.faces[0])), gl.STATIC_DRAW)
// create texture and shaders after all the data has been set up.
shader := &data.Shader{}
loader := data.NewLoader()
loader.Load("fire", &shader)
sf.shaders = gl.CreateProgram()
if err := gl.BindProgram(sf.shaders, shader.Vsh, shader.Fsh); err != nil {
fmt.Printf("Failed to create program: %s\n", err)
}
sf.mvpref = gl.GetUniformLocation(sf.shaders, "Mvpm")
sf.gTime = gl.GetUniformLocation(sf.shaders, "time")
sf.sizes = gl.GetUniformLocation(sf.shaders, "resolution")
sf.ortho = lin.NewOrtho(0, 4, 0, 4, 0, 10)
// set some state that doesn't need to change during drawing.
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
}