func DrawRTri(Red float64) {
gl.ClearColor(0.2, 0.2, 0.2, 1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.Color3d(game.Red, 0, 0)
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 1, 0)
gl.Vertex3d(1, 1, 0)
gl.Vertex3d(1, 0, 0)
gl.End()
}
func DrawEntity(en Entity) {
x := en.Xpos
y := en.Ypos
r := en.Rot
s := en.Size
col := en.Colour
switch col {
case "grey":
gl.Color3d(0.5, 0.5, 0.5)
case "red":
gl.Color3d(1, 0, 0)
case "green":
gl.Color3d(0, 1, 0)
case "blue":
gl.Color3d(0, 0, 1)
case "lblue":
gl.Color3d(0.3, 0.3, 1)
case "orange":
gl.Color3d(1, 0.5, 0)
case "yellow":
gl.Color3d(1, 1, 0)
case "purple":
gl.Color3d(1, 0, 1)
case "white":
gl.Color3d(1, 1, 1)
default:
gl.Color3d(1, 1, 1)
}
gl.PushMatrix()
gl.Translated(x, y, 0)
gl.Scaled(s, s, s)
//gl.Rotated(r*180/math.Pi, 0, 0, 1)
gl.Rotated(r, 0, 0, 1)
enx := [3]float64{-0.7, 0.7, 0}
eny := [3]float64{1, 1, -1}
//in OpenGL 3.2, the vertices below would be stored on the GPU
//so all you would need to do is say DrawShape(A) or something
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(enx[0], eny[0], 0)
gl.Vertex3d(enx[1], eny[1], 0)
gl.Vertex3d(enx[2], eny[2], 0)
gl.End()
gl.PopMatrix()
}
func (cube *Cube) Render() {
x, y, z := cube.Position.X, cube.Position.Y, cube.Position.Z
gl.Begin(gl.QUADS)
gl.Color3d(0.5-(x/50), 0.5-(y/50), 0.5-(z/50))
// Front Side
gl.TexCoord2f(0, 0)
gl.Vertex3d(x-0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 0)
gl.Vertex3d(x+0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 1)
gl.Vertex3d(x+0.5, y+0.5, z+0.5)
gl.TexCoord2f(0, 1)
gl.Vertex3d(x-0.5, y+0.5, z+0.5)
// Left Side
gl.Color3d(0.5-(x/20), 0.5-(y/20), 0.5-(z/20))
gl.TexCoord2f(0, 0)
gl.Vertex3d(x-0.5, y-0.5, z-0.5)
gl.TexCoord2f(1, 0)
gl.Vertex3d(x-0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 1)
gl.Vertex3d(x-0.5, y+0.5, z+0.5)
gl.TexCoord2f(0, 1)
gl.Vertex3d(x-0.5, y+0.5, z-0.5)
gl.End()
}
func DrawSizeableTri(Tr SizeableTri) {
ax := Tr.Ax
bx := Tr.Bx
cx := Tr.Cx
ay := Tr.Ay
by := Tr.By
cy := Tr.Cy
col := Tr.Colour
switch col {
case "grey":
gl.Color3d(0.5, 0.5, 0.5)
case "red":
gl.Color3d(1, 0, 0)
case "green":
gl.Color3d(0, 1, 0)
case "blue":
gl.Color3d(0, 0, 1)
case "lblue":
gl.Color3d(0.3, 0.3, 1)
case "orange":
gl.Color3d(1, 0.5, 0)
case "yellow":
gl.Color3d(1, 1, 0)
case "purple":
gl.Color3d(1, 0, 1)
default:
gl.Color3d(1, 1, 1)
}
gl.PushMatrix()
// gl.Translated(x, y, 0)
// gl.Scaled(s, s, s)
// gl.Rotated(r, 0, 0, 1)
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax, ay, 0)
gl.Vertex3d(bx, by, 0)
gl.Vertex3d(cx, cy, 0)
gl.End()
gl.PopMatrix()
}
// vertex draws vertices.
// Used in classic render mode.
func (a *Attr) vertex(i int) {
i *= a.size
switch a.size {
case 2:
switch v := a.data.(type) {
case []int16:
gl.Vertex2s(v[i], v[i+1])
case []int32:
gl.Vertex2i(int(v[i]), int(v[i+1]))
case []float32:
gl.Vertex2f(v[i], v[i+1])
case []float64:
gl.Vertex2d(v[i], v[i+1])
}
case 3:
switch v := a.data.(type) {
case []int16:
gl.Vertex3s(v[i], v[i+1], v[i+2])
case []int32:
gl.Vertex3i(int(v[i]), int(v[i+1]), int(v[i+2]))
case []float32:
gl.Vertex3f(v[i], v[i+1], v[i+2])
case []float64:
gl.Vertex3d(v[i], v[i+1], v[i+2])
}
case 4:
switch v := a.data.(type) {
case []int16:
gl.Vertex4s(v[i], v[i+1], v[i+2], v[i+3])
case []int32:
gl.Vertex4i(int(v[i]), int(v[i+1]), int(v[i+2]), int(v[i+3]))
case []float32:
gl.Vertex4f(v[i], v[i+1], v[i+2], v[i+3])
case []float64:
gl.Vertex4d(v[i], v[i+1], v[i+2], v[i+3])
}
}
}
// Draws lines of unit length along the X, Y, Z axis in R, G, B
func DrawAxes() {
gl.Begin(gl.LINES)
gl.Color3d(1, 0, 0)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(1, 0, 0)
gl.Color3d(0, 1, 0)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 1, 0)
gl.Color3d(0, 0, 1)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 0, 1)
gl.End()
}
func main_loop(data *ProgramData) {
start := time.Now()
frames := 0
lastblocks := 0
// Frame counter
go func() {
for {
time.Sleep(time.Second)
if *verbose {
memstats := new(runtime.MemStats)
runtime.ReadMemStats(memstats)
fps := float64(frames) / time.Since(start).Seconds()
blocks := len(data.blocks)
bps := float64(blocks-lastblocks) / time.Since(start).Seconds()
lastblocks = blocks
log.Printf("fps = %5.2f; blocks = %4d; bps = %5.2f sparemem = %6d MB; alloc'd = %6.6f; (+footprint = %6.6f)",
fps, len(data.blocks), bps, SpareRAM(), float64(memstats.Alloc)/1024/1024,
float64(memstats.Sys-memstats.Alloc)/1024/1024)
PrintTimers(frames)
}
start = time.Now()
frames = 0
}
}()
// Necessary at the moment to prevent eventual OOM
go func() {
for {
time.Sleep(5 * time.Second)
if *verbose {
log.Print("GC()")
}
runtime.GC()
if *verbose {
GCStats()
}
}
}()
var i int64 = -int64(*nback)
// TODO(pwaller): Make this work again
// text := glh.MakeText(data.filename, 32)
// Location of mouse in record space
var rec, rec_actual int64 = 0, 0
var stacktext, dwarftext []*glh.Text
var recordtext *glh.Text = nil
var mousex, mousey, mousedownx, mousedowny int
var mousepx, mousepy float64
var lbutton bool
escape_hit := false
glfw.SetMouseWheelCallback(func(pos int) {
nback_prev := *nback
if pos < 0 {
*nback = 40 * 1024 << uint(-pos)
} else {
*nback = 40 * 1024 >> uint(pos)
}
//log.Print("Mousewheel position: ", pos, " nback: ", *nback)
if rec == 0 {
return
}
// mouse cursor is at screen "rec_actual", and it should be after
// the transformation
// We need to adjust `i` to keep this value constant:
// rec_actual == i + int64(constpart * float64(*nback))
// where constpart <- (-const + 2.) / 4.
// (that way, the mouse is still pointing at the same place after scaling)
constpart := float64(rec_actual-i) / float64(nback_prev)
rec_actual_after := i + int64(constpart*float64(*nback))
delta := rec_actual_after - rec_actual
i -= delta
// Ensure the mouse cursor position doesn't change when zooming
rec = rec_actual - i
})
update_text := func() {
if DoneThisFrame(RenderText) {
return
}
if recordtext != nil {
recordtext.Destroy()
recordtext = nil
}
//r := 0 //data.GetRecord(rec_actual)
//if r != nil {
//log.Print(data.records[rec_actual])
//recordtext = MakeText(r.String(), 32)
//}
for j := range stacktext {
stacktext[j].Destroy()
}
// TODO: Load records on demand
if false {
stack := data.GetStackNames(rec_actual)
stacktext = make([]*glh.Text, len(stack))
for j := range stack {
stacktext[j] = glh.MakeText(stack[j], 32)
}
}
}
glfw.SetMouseButtonCallback(func(button, action int) {
switch button {
case glfw.Mouse1:
switch action {
case glfw.KeyPress:
mousedownx, mousedowny = mousex, mousey
lbutton = true
r := data.GetRecord(rec_actual)
if r != nil {
if r.Type == MEMA_ACCESS {
log.Print(r)
ma := r.MemAccess()
dwarf := data.GetDwarf(ma.Pc)
log.Print("Can has dwarf? ", len(dwarf))
for i := range dwarf {
log.Print(" ", dwarf[i])
//recordtext = MakeText(data.records[rec_actual].String(), 32)
}
log.Print("")
for j := range dwarftext {
dwarftext[j].Destroy()
}
dwarftext = make([]*glh.Text, len(dwarf))
for j := range dwarf {
dwarftext[j] = glh.MakeText(fmt.Sprintf("%q", dwarf[j]), 32)
}
}
//recordtext = MakeText(data.records[rec_actual].String(), 32)
}
case glfw.KeyRelease:
lbutton = false
}
}
})
glfw.SetMousePosCallback(func(x, y int) {
px, py := glh.WindowToProj(x, y)
// Record index
rec = int64((py+2)*float64(*nback)/4. + 0.5)
rec_actual = rec + i
dpy := py - mousepy
di := int64(-dpy * float64(*nback) / 4.)
if lbutton {
i += di
}
mousepx, mousepy = px, py
mousex, mousey = x, y
//log.Printf("Mouse motion: (%3d, %3d), (%f, %f), (%d, %d) dpy=%f di=%d",
//x, y, px, py, rec, rec_actual, dpy, di)
update_text()
})
glfw.SetKeyCallback(func(key, state int) {
switch key {
case glfw.KeyEsc:
escape_hit = true
}
})
draw_mousepoint := func() {
// Draw the mouse point
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.Translated(0, -2, 0)
gl.Scaled(1, 4/float64(*nback), 1)
gl.Translated(0, float64(rec), 0)
gl.PointSize(10)
glh.With(glh.Primitive{gl.POINTS}, func() {
gl.Color4f(1, 1, 1, 1)
gl.Vertex3d(mousepx, 0, 0)
})
})
}
draw_text := func() {
// Draw any text
glh.With(glh.WindowCoords{}, func() {
w, h := glh.GetViewportWHD()
glh.With(glh.Attrib{gl.ENABLE_BIT}, func() {
gl.Enable(gl.TEXTURE_2D)
// text.Draw(0, 0)
for text_idx := range stacktext {
stacktext[text_idx].Draw(int(w*0.55), int(h)-35-text_idx*16)
}
for text_idx := range dwarftext {
dwarftext[text_idx].Draw(int(w*0.55), 35+text_idx*16)
}
if recordtext != nil {
recordtext.Draw(int(w*0.55), 35)
}
})
})
}
Draw = func() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// Draw the memory access/function data
data.Draw(i, *nback)
draw_mousepoint()
draw_text()
// Visible region quad
// gl.Color4f(1, 1, 1, 0.25)
// DrawQuadd(-2.1, -2.25, 4.4, 2.1 - -2.25)
// StatsHUD()
}
interrupt := make(chan os.Signal)
signal.Notify(interrupt, os.Interrupt)
ctrlc_hit := false
go func() {
<-interrupt
ctrlc_hit = true
}()
done := false
for !done {
done_this_frame = make(map[WorkType]bool)
glh.With(&Timer{Name: "Draw"}, func() {
Draw()
})
glfw.SwapBuffers()
DoMainThreadWork()
done = ctrlc_hit || escape_hit || glfw.WindowParam(glfw.Opened) == 0
frames += 1
}
}
func gear(inner_radius, outer_radius, width float64, teeth int, tooth_depth float64) {
var i int
var r0, r1, r2 float64
var angle, da float64
var u, v, len float64
r0 = inner_radius
r1 = outer_radius - tooth_depth/2.0
r2 = outer_radius + tooth_depth/2.0
da = 2.0 * math.Pi / float64(teeth) / 4.0
gl.ShadeModel(gl.FLAT)
gl.Normal3d(0.0, 0.0, 1.0)
/* draw front face */
gl.Begin(gl.QUAD_STRIP)
for i = 0; i <= teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), width*0.5)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), width*0.5)
if i < teeth {
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), width*0.5)
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), width*0.5)
}
}
gl.End()
/* draw front sides of teeth */
gl.Begin(gl.QUADS)
da = 2.0 * math.Pi / float64(teeth) / 4.0
for i = 0; i < teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), width*0.5)
gl.Vertex3d(r2*math.Cos(angle+da), r2*math.Sin(angle+da), width*0.5)
gl.Vertex3d(r2*math.Cos(angle+2*da), r2*math.Sin(angle+2*da), width*0.5)
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), width*0.5)
}
gl.End()
gl.Normal3d(0.0, 0.0, -1.0)
/* draw back face */
gl.Begin(gl.QUAD_STRIP)
for i = 0; i <= teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), -width*0.5)
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), -width*0.5)
if i < teeth {
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), -width*0.5)
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), -width*0.5)
}
}
gl.End()
/* draw back sides of teeth */
gl.Begin(gl.QUADS)
da = 2.0 * math.Pi / float64(teeth) / 4.0
for i = 0; i < teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), -width*0.5)
gl.Vertex3d(r2*math.Cos(angle+2*da), r2*math.Sin(angle+2*da), -width*0.5)
gl.Vertex3d(r2*math.Cos(angle+da), r2*math.Sin(angle+da), -width*0.5)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), -width*0.5)
}
gl.End()
/* draw outward faces of teeth */
gl.Begin(gl.QUAD_STRIP)
for i = 0; i < teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), width*0.5)
gl.Vertex3d(r1*math.Cos(angle), r1*math.Sin(angle), -width*0.5)
u = r2*math.Cos(angle+da) - r1*math.Cos(angle)
v = r2*math.Sin(angle+da) - r1*math.Sin(angle)
len = math.Sqrt(u*u + v*v)
u /= len
v /= len
gl.Normal3d(v, -u, 0.0)
gl.Vertex3d(r2*math.Cos(angle+da), r2*math.Sin(angle+da), width*0.5)
gl.Vertex3d(r2*math.Cos(angle+da), r2*math.Sin(angle+da), -width*0.5)
gl.Normal3d(math.Cos(angle), math.Sin(angle), 0.0)
gl.Vertex3d(r2*math.Cos(angle+2*da), r2*math.Sin(angle+2*da), width*0.5)
gl.Vertex3d(r2*math.Cos(angle+2*da), r2*math.Sin(angle+2*da), -width*0.5)
u = r1*math.Cos(angle+3*da) - r2*math.Cos(angle+2*da)
v = r1*math.Sin(angle+3*da) - r2*math.Sin(angle+2*da)
gl.Normal3d(v, -u, 0.0)
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), width*0.5)
gl.Vertex3d(r1*math.Cos(angle+3*da), r1*math.Sin(angle+3*da), -width*0.5)
gl.Normal3d(math.Cos(angle), math.Sin(angle), 0.0)
}
gl.Vertex3d(r1*math.Cos(0), r1*math.Sin(0), width*0.5)
gl.Vertex3d(r1*math.Cos(0), r1*math.Sin(0), -width*0.5)
gl.End()
gl.ShadeModel(gl.SMOOTH)
/* draw inside radius cylinder */
gl.Begin(gl.QUAD_STRIP)
for i = 0; i <= teeth; i++ {
angle = float64(i) * 2.0 * math.Pi / float64(teeth)
gl.Normal3d(-math.Cos(angle), -math.Sin(angle), 0.0)
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), -width*0.5)
gl.Vertex3d(r0*math.Cos(angle), r0*math.Sin(angle), width*0.5)
}
gl.End()
}
func tessVertexHandler(vertexData interface{}, polygonData interface{}) {
v := vertexData.(*[3]float64)
gl.Vertex3d((*v)[0], (*v)[1], (*v)[2])
}
func main() {
var err error
if err = glfw.Init(); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.Terminate()
w, h := 1980, 1080
// w, h := 1280, 768
if err = glfw.OpenWindow(w, h, 8, 8, 8, 16, 0, 32, glfw.Fullscreen); err != nil {
fmt.Fprintf(os.Stderr, "[e] %v\n", err)
return
}
defer glfw.CloseWindow()
glfw.SetSwapInterval(1)
glfw.SetWindowTitle("Debris")
quadric = glu.NewQuadric()
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LEQUAL)
gl.Enable(gl.NORMALIZE)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ShadeModel(gl.SMOOTH)
gl.Enable(gl.LIGHTING)
var (
ambient = []float32{0.1, 0.3, 0.6, 1}
diffuse = []float32{1, 1, 0.5, 1}
specular = []float32{0.4, 0.4, 0.4, 1}
light_position = []float32{1, 0, 0, 0}
// mat_specular []float32 = []float32{1, 1, 0.5, 1}
mat_specular = []float32{1, 1, 0.75, 1}
mat_shininess = float32(120)
// light_position []float32 = []float32{0.0, 0.0, 1.0, 0.0}
)
const (
fov = 1.1 // degrees
znear = 145
zfar = 155
camera_z_offset = -150
camera_x_rotation = 0 // degrees
// camera_x_rotation = 20 // degrees
starfield_fov = 45
faces = 1000
earth_radius = 1
)
gl.Lightfv(gl.LIGHT1, gl.AMBIENT, ambient)
gl.Lightfv(gl.LIGHT1, gl.DIFFUSE, diffuse)
gl.Lightfv(gl.LIGHT1, gl.SPECULAR, specular)
gl.Lightfv(gl.LIGHT1, gl.POSITION, light_position)
gl.Enable(gl.LIGHT1)
mat_emission := []float32{0, 0, 0.1, 1}
gl.Materialfv(gl.FRONT_AND_BACK, gl.EMISSION, mat_emission)
gl.Materialfv(gl.FRONT_AND_BACK, gl.SPECULAR, mat_specular)
gl.Materialf(gl.FRONT_AND_BACK, gl.SHININESS, mat_shininess)
gl.ClearColor(0.02, 0.02, 0.02, 1)
gl.ClearDepth(1)
gl.ClearStencil(0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
b := createBuffer()
planetoids := []*Planetoid{}
for i := 0; i < 1000; i++ {
p := &Planetoid{
apogee: 1.2 + rand.Float64()*0.7,
perigee: 1.5,
// inclination: 45,
inclination: rand.Float64()*20 - 10,
// inclination: 0,
phase0: rand.Float64() * 360,
rising_node: rand.Float64() * 10,
phase: 0,
// radius: rand.Float32()*0.05 + 0.01, //float32(r),
radius: rand.Float32()*0.0125 + 0.005, //float32(r),
// quadric: glu.NewQuadric(),
circle: b,
}
planetoids = append(planetoids, p)
}
// Initial projection matrix:
var aspect float64
glfw.SetWindowSizeCallback(func(w, h int) {
gl.Viewport(0, 0, w, h)
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
aspect = float64(w) / float64(h)
glu.Perspective(fov, aspect, znear, zfar)
})
d := float64(0)
wireframe := false
atmosphere := false
polar := false
rotating := false
front := false
earth := true
cone := true
shadowing := true
tilt := false
running := true
glfw.SetKeyCallback(func(key, state int) {
if state != glfw.KeyPress {
// Don't act on key coming up
return
}
switch key {
case 'A':
atmosphere = !atmosphere
case 'C':
cone = !cone
case 'E':
earth = !earth
case 'R':
rotating = !rotating
case 'F':
front = !front
if front {
gl.FrontFace(gl.CW)
} else {
gl.FrontFace(gl.CCW)
}
case 'S':
shadowing = !shadowing
case 'T':
tilt = !tilt
case 'W':
wireframe = !wireframe
method := gl.GLenum(gl.FILL)
if wireframe {
method = gl.LINE
}
gl.PolygonMode(gl.FRONT_AND_BACK, method)
case glfw.KeyF2:
println("Screenshot captured")
// glh.CaptureToPng("screenshot.png")
w, h := glh.GetViewportWH()
im := image.NewRGBA(image.Rect(0, 0, w, h))
glh.ClearAlpha(1)
gl.Flush()
glh.CaptureRGBA(im)
go func() {
fd, err := os.Create("screenshot.png")
if err != nil {
panic("Unable to open file")
}
defer fd.Close()
png.Encode(fd, im)
}()
case 'Q', glfw.KeyEsc:
running = !running
case glfw.KeySpace:
polar = !polar
}
})
_ = rand.Float64
stars := glh.NewMeshBuffer(
glh.RenderArrays,
glh.NewPositionAttr(3, gl.DOUBLE, gl.STATIC_DRAW),
glh.NewColorAttr(3, gl.DOUBLE, gl.STATIC_DRAW))
const Nstars = 50000
points := make([]float64, 3*Nstars)
colors := make([]float64, 3*Nstars)
for i := 0; i < Nstars; i++ {
const R = 1
phi := rand.Float64() * 2 * math.Pi
z := R * (2*rand.Float64() - 1)
theta := math.Asin(z / R)
points[i*3+0] = R * math.Cos(theta) * math.Cos(phi)
points[i*3+1] = R * math.Cos(theta) * math.Sin(phi)
points[i*3+2] = z
const r = 0.8
v := rand.Float64()*r + (1 - r)
colors[i*3+0] = v
colors[i*3+1] = v
colors[i*3+2] = v
}
stars.Add(points, colors)
render_stars := func() {
glh.With(glh.Attrib{gl.DEPTH_BUFFER_BIT | gl.ENABLE_BIT}, func() {
gl.Disable(gl.LIGHTING)
gl.PointSize(1)
gl.Color4f(1, 1, 1, 1)
gl.Disable(gl.DEPTH_TEST)
gl.DepthMask(false)
stars.Render(gl.POINTS)
})
}
render_scene := func() {
// Update light position (sensitive to current modelview matrix)
gl.Lightfv(gl.LIGHT1, gl.POSITION, light_position)
gl.Lightfv(gl.LIGHT2, gl.POSITION, light_position)
if earth {
Sphere(earth_radius, faces)
}
unlit_points := glh.Compound(glh.Disable(gl.LIGHTING), glh.Primitive{gl.POINTS})
glh.With(unlit_points, func() {
gl.Vertex3d(1, 0, 0)
})
for _, p := range planetoids {
const dt = 0.1 // TODO: Frame update
p.Render(dt)
}
glh.With(glh.Disable(gl.LIGHTING), func() {
// Atmosphere
gl.Color4f(0.25, 0.25, 1, 0.1)
if atmosphere && earth {
Sphere(earth_radius*1.025, 100)
}
gl.PointSize(10)
glh.With(glh.Primitive{gl.POINTS}, func() {
gl.Color4f(1.75, 0.75, 0.75, 1)
gl.Vertex3d(-1.04, 0, 0)
})
})
}
render_shadow_volume := func() {
glh.With(glh.Attrib{
gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.ENABLE_BIT |
gl.POLYGON_BIT | gl.STENCIL_BUFFER_BIT,
}, func() {
gl.Disable(gl.LIGHTING)
if shadowing {
// gl.Disable(gl.DEPTH_TEST)
gl.DepthMask(false)
gl.DepthFunc(gl.LEQUAL)
gl.Enable(gl.STENCIL_TEST)
gl.ColorMask(false, false, false, false)
gl.StencilFunc(gl.ALWAYS, 1, 0xffffffff)
}
shadow_volume := func() {
const sv_length = 2
const sv_granularity = 100
const sv_radius = earth_radius * 1.001
// Shadow cone
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.Rotatef(90, 1, 0, 0)
gl.Rotatef(90, 0, -1, 0)
gl.Color4f(0.5, 0.5, 0.5, 1)
glu.Cylinder(quadric, sv_radius, sv_radius*1.05,
sv_length, sv_granularity, 1)
glu.Disk(quadric, 0, sv_radius, sv_granularity, 1)
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.Translated(0, 0, sv_length)
glu.Disk(quadric, 0, sv_radius*1.05, sv_granularity, 1)
})
})
for _, p := range planetoids {
p.RenderShadowVolume()
}
}
if cone {
gl.FrontFace(gl.CCW)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.INCR)
shadow_volume()
gl.FrontFace(gl.CW)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.DECR)
shadow_volume()
}
if shadowing {
gl.StencilFunc(gl.NOTEQUAL, 0, 0xffffffff)
gl.StencilOp(gl.KEEP, gl.KEEP, gl.KEEP)
gl.ColorMask(true, true, true, true)
// gl.Disable(gl.STENCIL_TEST)
gl.Disable(gl.DEPTH_TEST)
gl.FrontFace(gl.CCW)
// gl.Color4f(1, 0, 0, 0.75)
gl.Color4f(0, 0, 0, 0.75)
// gl.Color4f(1, 1, 1, 0.75)
gl.LoadIdentity()
gl.Translated(0, 0, camera_z_offset)
// TODO: Figure out why this doesn't draw over the whole screen
glh.With(glh.Disable(gl.LIGHTING), func() {
glh.DrawQuadd(-10, -10, 20, 20)
})
// gl.FrontFace(gl.CW)
// gl.Enable(gl.LIGHTING)
// gl.Disable(gl.LIGHT1)
// render_scene()
// gl.Enable(gl.LIGHT1)
}
})
}
_ = render_stars
for running {
running = glfw.WindowParam(glfw.Opened) == 1
glfw.SwapBuffers()
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
rotation := func() {
if tilt {
gl.Rotated(20, 1, 0, 0)
}
if polar {
gl.Rotated(90, 1, 0, 0)
}
gl.Rotated(d, 0, -1, 0)
}
// Star field
glh.With(glh.Matrix{gl.PROJECTION}, func() {
gl.LoadIdentity()
glu.Perspective(starfield_fov, aspect, 0, 1)
glh.With(glh.Matrix{gl.MODELVIEW}, func() {
gl.LoadIdentity()
rotation()
render_stars()
})
})
gl.MatrixMode(gl.MODELVIEW)
gl.LoadIdentity()
gl.Translated(0, 0, camera_z_offset)
rotation()
if rotating {
d += 0.2
}
_ = render_scene
render_scene()
_ = render_shadow_volume
render_shadow_volume()
}
}
func DrawLine(Ln Line) {
ax := Ln.Ax
ay := Ln.Ay
bx := Ln.Bx
by := Ln.By
col := Ln.Colour
switch col {
case "grey":
gl.Color3d(0.5, 0.5, 0.5)
case "red":
gl.Color3d(1, 0, 0)
case "green":
gl.Color3d(0, 1, 0)
case "blue":
gl.Color3d(0, 0, 1)
case "lblue":
gl.Color3d(0.3, 0.3, 1)
case "orange":
gl.Color3d(1, 0.5, 0)
case "yellow":
gl.Color3d(1, 1, 0)
case "purple":
gl.Color3d(1, 0, 1)
default:
gl.Color3d(1, 1, 1)
}
if ay != by {
gl.PushMatrix()
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax-0.2, ay, 0)
gl.Vertex3d(ax+0.2, ay, 0)
gl.Vertex3d(ax-0.2, by, 0)
gl.End()
gl.PopMatrix()
gl.PushMatrix()
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax+0.2, ay, 0)
gl.Vertex3d(ax+0.2, by, 0)
gl.Vertex3d(ax-0.2, by, 0)
gl.End()
gl.PopMatrix()
} else {
gl.PushMatrix()
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax, ay+0.2, 0)
gl.Vertex3d(bx, by+0.2, 0)
gl.Vertex3d(bx, by-0.2, 0)
gl.End()
gl.PopMatrix()
gl.PushMatrix()
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax, ay+0.2, 0)
gl.Vertex3d(ax, ay-0.2, 0)
gl.Vertex3d(bx, by-0.2, 0)
gl.End()
gl.PopMatrix()
}
}
