func (j *jsonObject) object(meshes map[string]*jsonMesh, findTexture func(name string) *gfx.Texture, findTransform func(name string) *gfx.Transform, findShader func(name string) *gfx.Shader) *gfx.Object {
o := gfx.NewObject()
if j.OcclusionTest != nil {
o.OcclusionTest = *j.OcclusionTest
}
//o.Props = j.Props
o.Meshes = make([]*gfx.Mesh, len(j.Meshes))
for i, m := range j.Meshes {
o.Meshes[i] = meshes[m].mesh()
}
o.Textures = make([]*gfx.Texture, len(j.Textures))
for i, t := range j.Textures {
o.Textures[i] = findTexture(t)
}
if j.Shader != nil {
o.Shader = findShader(*j.Shader)
}
if j.Transform != nil {
o.Transform = findTransform(*j.Transform)
}
return o
}
// gfxLoop is responsible for drawing things to the window. This loop must be
// independent of the Chippy main loop.
func gfxLoop(w *chippy.Window, r gfx.Renderer) {
// Create a simple shader.
shader := &gfx.Shader{
Name: "SimpleShader",
GLSLVert: glslVert,
GLSLFrag: glslFrag,
}
// Preload the shader (useful for seeing shader errors, if any).
onLoad := make(chan *gfx.Shader, 1)
r.LoadShader(shader, onLoad)
go func() {
<-onLoad
shader.RLock()
if shader.Loaded {
fmt.Println("Shader loaded")
} else {
fmt.Println(string(shader.Error))
}
shader.RUnlock()
}()
n := 25000
// Create a new batch.
triangles := make([]*gfx.Object, 0, n)
for i := 0; i < n; i++ {
// Create a triangle object.
triangle := gfx.NewObject()
triangle.Shader = shader
triangle.Meshes = []*gfx.Mesh{
&gfx.Mesh{
Vertices: []gfx.Vec3{
// Top
{-.5, 0, 0},
{.5, 0, 0},
{0, 1, 0},
},
Colors: []gfx.Color{
// Top
{1, 0, 0, 1},
{0, 1, 0, 1},
{0, 0, 1, 1},
},
},
}
triangles = append(triangles, triangle)
}
for {
// Clear the entire area (empty rectangle means "the whole area").
r.Clear(image.Rect(0, 0, 0, 0), gfx.Color{1, 1, 1, 1})
r.ClearDepth(image.Rect(0, 0, 0, 0), 1.0)
// Clear a few rectangles on the window using different background
// colors.
r.Clear(image.Rect(0, 100, 640, 380), gfx.Color{0, 1, 0, 1})
r.Clear(image.Rect(100, 100, 540, 380), gfx.Color{1, 0, 0, 1})
r.Clear(image.Rect(100, 200, 540, 280), gfx.Color{0, 0.5, 0.5, 1})
r.Clear(image.Rect(200, 200, 440, 280), gfx.Color{1, 1, 0, 1})
// Draw triangles using the batcher.
for _, triangle := range triangles {
r.Draw(image.Rect(50, 50, 640-50, 480-50), triangle, nil)
}
// Render the whole frame.
r.Render()
}
}
// gfxLoop is responsible for drawing things to the window. This loop must be
// independent of the Chippy main loop.
func gfxLoop(w *chippy.Window, r gfx.Renderer) {
w.SetSize(640, 640)
w.SetPositionCenter(chippy.DefaultScreen())
glr := r.(*gl2.Renderer)
glr.UpdateBounds(image.Rect(0, 0, 640, 640))
// Create a camera.
// Wait for the shader to load (not strictly required).
onLoad := make(chan *gfx.Shader, 1)
r.LoadShader(Wireframe, onLoad)
go func() {
<-onLoad
Wireframe.RLock()
if Wireframe.Loaded {
fmt.Println("Shader loaded")
} else {
fmt.Println(string(Wireframe.Error))
}
Wireframe.RUnlock()
}()
// Create a triangle object.
triangle := gfx.NewObject()
triangle.Shader = Wireframe
triangle.Meshes = []*gfx.Mesh{
&gfx.Mesh{},
}
triangle.Meshes[0].GenerateBary()
triangle.FaceCulling = gfx.NoFaceCulling
triangle.AlphaMode = gfx.AlphaToCoverage
tree := ntree.New()
level := 0
go func() {
events := w.Events()
for {
e := <-events
kev, ok := e.(keyboard.TypedEvent)
if ok {
if kev.Rune == ' ' || kev.Rune == 'b' {
for i := 0; i < 1; i++ {
s := random(0.1, 0.15)
if kev.Rune == 'b' {
s = random(0.1, 0.5)
}
tree.Add(s)
}
// Create new mesh and ask the renderer to load it.
newMesh := NTreeMesh(tree, level)
onLoad := make(chan *gfx.Mesh, 1)
r.LoadMesh(newMesh, onLoad)
<-onLoad
// Swap the mesh.
triangle.Lock()
triangle.Meshes[0] = newMesh
triangle.Unlock()
}
if kev.Rune == '1' || kev.Rune == '2' {
if kev.Rune == '1' {
level--
} else {
level++
}
fmt.Println("level", level)
// Create new mesh and ask the renderer to load it.
newMesh := NTreeMesh(tree, level)
onLoad := make(chan *gfx.Mesh, 1)
r.LoadMesh(newMesh, onLoad)
<-onLoad
// Swap the mesh.
triangle.Lock()
triangle.Meshes[0] = newMesh
triangle.Unlock()
}
if kev.Rune == 's' || kev.Rune == 'S' {
fmt.Println("Writing screenshot to file...")
// Download the image from the graphics hardware and save
// it to disk.
complete := make(chan image.Image, 1)
r.Download(image.Rect(0, 0, 0, 0), complete)
img := <-complete // Wait for download to complete.
// Save to png.
f, err := os.Create("screenshot.png")
if err != nil {
log.Fatal(err)
}
err = png.Encode(f, img)
if err != nil {
log.Fatal(err)
}
fmt.Println("Wrote texture to screenshot.png")
}
}
}
}()
for {
// Clear the entire area (empty rectangle means "the whole area").
r.Clear(image.Rect(0, 0, 0, 0), gfx.Color{1, 1, 1, 1})
r.ClearDepth(image.Rect(0, 0, 0, 0), 1.0)
// Update the rotation.
dt := r.Clock().Dt()
triangle.RLock()
rot := triangle.Transform.Rot()
if w.Keyboard.Down(keyboard.ArrowLeft) {
rot.Z += 90 * dt
}
if w.Keyboard.Down(keyboard.ArrowRight) {
rot.Z -= 90 * dt
}
if w.Keyboard.Down(keyboard.ArrowUp) {
rot.X += 20 * dt
}
if w.Keyboard.Down(keyboard.ArrowDown) {
rot.X -= 20 * dt
}
triangle.Transform.SetRot(rot)
triangle.RUnlock()
// Draw the triangle to the screen.
r.Draw(image.Rect(0, 0, 0, 0), triangle, nil)
// Render the whole frame.
r.Render()
}
}