// 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) {
// Load the Ice file.
scene, err := ice.LoadFile(os.Args[1])
if err != nil {
log.Fatal(err)
}
// Setup a camera to use a perspective projection.
camera := gfx.NewCamera()
camFOV := 75.0
camNear := 0.1
camFar := 100.0
camera.SetPersp(r.Bounds(), camFOV, camNear, camFar)
// Move the camera -2 on the Y axis (back two units away from the triangle
// object).
//camera.SetPos(math.Vec3{0, -50, 10})
//camera.SetPos(math.Vec3{0, -5, 2})
camera.SetPos(math.Vec3{0, -7, 3})
// Create a simple shader.
shader := gfx.NewShader("SimpleShader")
shader.GLSLVert = glslVert
shader.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 {
log.Println(string(shader.Error))
}
shader.RUnlock()
}()
// Assign the shader to each object in the scene.
for _, o := range scene.Objects {
o.Shader = shader
o.State.FaceCulling = gfx.NoFaceCulling
//var verts = make([]gfx.Vec3, 0, len(o.Meshes[0].Indices))
//for _, v := range o.Meshes[0].Indices {
// verts = append(verts, o.Meshes[0].Vertices[v])
//}
//o.Meshes[0].Vertices = verts
//o.Meshes[0].Indices = nil
//if len(o.Meshes[0].Indices) > 5 {
// log.Println(name, len(o.Meshes[0].Indices))
// bad := o.Meshes[0].Indices[743]
// log.Println(o.Meshes[0].Vertices[bad])
// o.Meshes[0].Indices = o.Meshes[0].Indices[744-3:744]
//}
}
// Start a goroutine to handle window events and move the camera around.
go func() {
event := w.Events()
for {
select {
case e := <-event:
switch ev := e.(type) {
case keyboard.TypedEvent:
if ev.Rune == 'm' {
// Toggle MSAA now.
msaa := !r.MSAA()
r.SetMSAA(msaa)
log.Println("MSAA Enabled?", msaa)
}
case mouse.Event:
if ev.Button == mouse.Left && ev.State == mouse.Down {
w.SetCursorGrabbed(!w.CursorGrabbed())
}
}
}
}
}()
event := w.Events()
for {
camEvents:
for {
select {
case e := <-event:
switch ev := e.(type) {
case chippy.ResizedEvent:
// Update the camera's projection matrix for the new width and
// height.
camera.Lock()
camera.SetPersp(r.Bounds(), camFOV, camNear, camFar)
camera.Unlock()
case chippy.CursorPositionEvent:
if w.CursorGrabbed() {
dt := r.Clock().Dt()
camera.Lock()
camRot := camera.Rot()
camRot.Z -= 4 * ev.X * dt
camRot.X -= 4 * ev.Y * dt
camera.SetRot(camRot)
camera.Unlock()
}
}
default:
break camEvents
}
}
// Move the camera now.
if w.CursorGrabbed() {
dt := r.Clock().Dt()
var local, parent math.Vec3
speed := 16.0
if w.Keyboard.Down(keyboard.A) {
local.X -= speed * dt
}
if w.Keyboard.Down(keyboard.D) {
local.X += speed * dt
}
if w.Keyboard.Down(keyboard.W) {
local.Y += speed * dt
}
if w.Keyboard.Down(keyboard.S) {
local.Y -= speed * dt
}
if w.Keyboard.Down(keyboard.LeftCtrl) {
parent.Z -= speed * dt
}
if w.Keyboard.Down(keyboard.LeftShift) {
parent.Z += speed * dt
}
camera.Lock()
worldSpace := camera.ConvertPos(local, gfx.LocalToWorld)
parentSpace := camera.ConvertPos(worldSpace, gfx.WorldToParent)
camera.SetPos(parentSpace.Add(parent))
camera.Unlock()
}
// 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)
// Draw each model in the scene.
for _, o := range scene.Objects {
r.Draw(image.Rect(0, 0, 0, 0), o, camera)
}
// 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()
}
}