func newGameState(window mandala.Window) *gameState {
s := new(gameState)
s.window = window
s.window.MakeContextCurrent()
w, h := window.GetSize()
s.world = newWorld(w, h)
// Create the building reading it from a string
rand.Seed(int64(time.Now().Nanosecond()))
// Uncomment the following lines to generate the world
// starting from a string (defined in world.go)
// s.world.createFromString(pyramid)
// s.world.setGround(newGround(0, float32(10), float32(w), float32(10)))
s.world.createFromSvg("raw/world.svg")
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
return s
}
func draw() {
// Draw
gl.ClearColor(0.9, 0.85, 0.46, 0.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
w := g.world
w.background.Draw()
}
// NewGameState creates a new game state. It needs a window onto which
// render the scene.
func NewGameState(window mandala.Window) *GameState {
s := new(GameState)
s.window = window
s.window.MakeContextCurrent()
w, h := window.GetSize()
s.World = NewWorld(w, h)
s.Fps = DefaultFps
// Uncomment the following lines to generate the world
// starting from a string (defined in world.go)
// s.World.CreateFromString(pyramid)
// s.World.setGround(newGround(s.World, 0, float32(10), float32(w), float32(10)))
s.World.CreateFromSvg("raw/world.svg")
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
return s
}
func (renderState *renderState) init(window gorgasm.Window) {
window.MakeContextCurrent()
renderState.window = window
width, height := window.GetSize()
// Set the viewport
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
check()
// Compile the shaders
program := Program(FragmentShader(fsh), VertexShader(vsh))
gl.UseProgram(program)
check()
// Get attributes
attrPos = uint32(gl.GetAttribLocation(program, "pos"))
attrTexIn = uint32(gl.GetAttribLocation(program, "texIn"))
unifTexture = gl.GetUniformLocation(program, "texture")
gl.EnableVertexAttribArray(attrPos)
gl.EnableVertexAttribArray(attrTexIn)
check()
// Upload vertices data
gl.GenBuffers(1, &verticesArrayBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, verticesArrayBuffer)
gl.BufferData(gl.ARRAY_BUFFER, gl.SizeiPtr(len(vertices))*4, gl.Void(&vertices[0]), gl.STATIC_DRAW)
check()
// Upload texture data
img, err := loadImage(GOPHER_PNG)
if err != nil {
panic(err)
}
// Prepare the image to be placed on a texture.
bounds := img.Bounds()
imgWidth, imgHeight := bounds.Size().X, bounds.Size().Y
buffer := make([]byte, imgWidth*imgHeight*4)
index := 0
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
r, g, b, a := img.At(x, y).RGBA()
buffer[index] = byte(r)
buffer[index+1] = byte(g)
buffer[index+2] = byte(b)
buffer[index+3] = byte(a)
index += 4
}
}
gl.GenTextures(1, &textureBuffer)
gl.BindTexture(gl.TEXTURE_2D, textureBuffer)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(imgWidth), gl.Sizei(imgHeight), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Void(&buffer[0]))
check()
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
}
func (renderState *renderState) init(window mandala.Window) {
window.MakeContextCurrent()
renderState.window = window
width, height := window.GetSize()
// Set the viewport
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
gl.ClearColor(0.0, 0.0, 1.0, 1.0)
}
func (renderState *renderState) init(window mandala.Window) {
window.MakeContextCurrent()
renderState.window = window
width, height := window.GetSize()
// Set the viewport
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
check()
// Compile the shaders
program := shaders.NewProgram(fsh, vsh)
program.Use()
check()
// Get attributes
attrPos = program.GetAttribute("pos")
attrTexIn = program.GetAttribute("texIn")
unifTexture = program.GetUniform("texture")
gl.EnableVertexAttribArray(attrPos)
gl.EnableVertexAttribArray(attrTexIn)
check()
// Upload texture data
img, err := loadImage(GOPHER_PNG)
if err != nil {
panic(err)
}
// Prepare the image to be placed on a texture.
bounds := img.Bounds()
imgWidth, imgHeight := bounds.Size().X, bounds.Size().Y
buffer := make([]byte, imgWidth*imgHeight*4)
index := 0
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
r, g, b, a := img.At(x, y).RGBA()
buffer[index] = byte(r)
buffer[index+1] = byte(g)
buffer[index+2] = byte(b)
buffer[index+3] = byte(a)
index += 4
}
}
gl.GenTextures(1, &textureBuffer)
gl.BindTexture(gl.TEXTURE_2D, textureBuffer)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(imgWidth), gl.Sizei(imgHeight), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Void(&buffer[0]))
check()
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
}
func NewWorld(width, height int) *World {
gl.Enable(gl.DEPTH_TEST)
gl.ClearColor(0.0, 0.0, 0.0, 0.0)
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
return &World{
Width: width,
Height: height,
objects: make([]*Cube, 0),
projection: mathgl.Perspective(60, float32(width)/float32(height), 1, 20),
view: mathgl.Ident4f(),
}
}
func (renderState *renderState) init(window mandala.Window) {
window.MakeContextCurrent()
renderState.window = window
width, height := window.GetSize()
// Set the viewport
gl.Viewport(0, 0, gl.Sizei(width), gl.Sizei(height))
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
renderState.boxProgram = shaders.NewProgram(shapes.DefaultBoxFS, shapes.DefaultBoxVS)
renderState.segmentProgram = shaders.NewProgram(shapes.DefaultSegmentFS, shapes.DefaultSegmentVS)
}
func draw() {
gl.ClearColor(1.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
}