// rotext draws text, rotated around the center of the screen, progressively faded
func rotext(w, h, n int, s string) {
fade := (100.0 / openvg.VGfloat(n)) / 100.0
deg := 360.0 / openvg.VGfloat(n)
x := openvg.VGfloat(w) / 2.0
y := openvg.VGfloat(h) / 2.0
alpha := openvg.VGfloat(1.0)
size := w / 8
openvg.Start(w, h)
openvg.Background(0, 0, 0)
openvg.Translate(x, y)
for i := 0; i < n; i++ {
openvg.FillRGB(255, 255, 255, alpha)
openvg.Text(0, 0, s, "serif", size)
alpha -= fade // fade
size += n // enlarge
openvg.Rotate(deg)
}
openvg.End()
}
func main() {
var cy, ch, midy int
var message []string
message = []string{" Black", "cats", "skitter", "and", "ghouls", "patter", "Happy", "Halloween"}
w, h := openvg.Init()
//var speed openvg.VGfloat = 0.5
var x openvg.VGfloat = 0
var vw, vh openvg.VGfloat
var midxx openvg.VGfloat = openvg.VGfloat(w / 2)
midy = (h / 2)
fontsize := w / 8
//cx = 0
ch = fontsize * 2
//cw = w
cy = midy - (ch / 2)
var redness uint8
var index int
//rx , rw, rh := openvg.VGfloat(cx) , openvg.VGfloat(cw), openvg.VGfloat(ch)
ry := openvg.VGfloat(cy)
// scroll the text, only in the clipping rectangle
index = 0
for {
for redness = 255; redness > 16; redness -= 2 {
ch = fontsize * 2
//cw = w
cy = midy - (ch / 2)
openvg.Start(w, h)
openvg.Background(redness, 0, 0)
openvg.FillRGB(0, 0, 0, .2)
//openvg.Rect(rx, ry, rw, rh)
//openvg.ClipRect(cx, cy, cw, ch)
openvg.Translate(x, ry+openvg.VGfloat(fontsize/2))
openvg.FillRGB(0, 0, 0, 1)
var fsiz int
fsiz = int(255 - redness)
openvg.TextMid(midxx, 0, message[index], "shf", fsiz)
openvg.ClipEnd()
openvg.End()
}
index = (index + 1) % 8
if index == 0 {
vw = openvg.VGfloat(w) - 200
vh = openvg.VGfloat(h) - 200
openvg.Video(100.0, 100.0, vw, vh, "test.h264")
}
if index == 0 {
var test, oix int
var xpos [40]float32
var ypos [40]float32
var rotate [40]float32
var spdx [40]float32
var spdy [40]float32
// Init positions
for test = 0; test < 40; test++ {
var rot = rand.Float32()
var rax = rand.Float32()
rax = float32(w) * rax
var ray = rand.Float32()
ray = float32(h) * ray
spdx[test] = float32(test) * rand.Float32()
spdy[test] = float32(test) * rand.Float32()
ypos[test] = ray
xpos[test] = rax
rot = 0
rotate[test] = rot
}
// Move around
for oix = 0; oix < 100; oix++ {
openvg.Start(w, h)
openvg.Background(0, 0, 0)
openvg.FillColor("red")
for test = 0; test < 40; test++ {
var rot = rand.Float32()
var rax = rand.Float32()*float32(4.0) - float32(2.0)
var ray = float32(4.0)*rand.Float32() - float32(2.0)
spdy[test] += ray
spdx[test] += rax
xpos[test] = xpos[test] + spdx[test]
ypos[test] = ypos[test] + spdy[test]
rotate[test] = rotate[test] + float32(rot*4-2)
openvg.Rotate(openvg.VGfloat(rotate[test]))
openvg.Translate(openvg.VGfloat(xpos[test]), openvg.VGfloat(ypos[test]))
openvg.TextMid(0, 0, "Happy Halloween", "shf", 30)
openvg.Translate(-openvg.VGfloat(xpos[test]), -openvg.VGfloat(ypos[test]))
openvg.Rotate(-openvg.VGfloat(rotate[test]))
}
openvg.End()
}
}
}
bufio.NewReader(os.Stdin).ReadBytes('\n')
openvg.Finish()
os.Exit(0)
}
