func Draw(pm nimble.PixMap, cm colorMap, running bool) {
setColoring(cm)
width, height := pm.Size()
if width != xSize || height != ySize {
panic(fmt.Sprintf("radar.Draw: (width,height)=(%v,%v) (xSize,ySize)=(%v,%v)\n",
width, height, xSize, ySize))
}
src := nimble.MakePixMap(width, height, getFrame(frameCounter), width)
pm.Copy(0, 0, &src)
if running {
frameCounter = (frameCounter + 1) % (int32(len(frameStorage)) / frameSize)
}
}
// drawFrequonsFourier draws the frequency-domain representation of Frequons.
func drawFrequonsFourier(pm nimble.PixMap) {
c := universe.Zoo
h := harmonicStorage[:len(c)]
var ampScale float32
if autoGain.Value {
// Compute L1 norm of amplitudes
norm := float32(0)
for i := range c {
norm += math32.Abs(c[i].Amplitude)
}
ampScale = 1 / norm
} else {
ampScale = 1 / float32(len(c))
}
fracX, fracY := universe.BoxFraction()
fracX *= zoomCompression
fracY *= zoomCompression
sizeX, sizeY := pm.Size()
// Set up harmonics
// (cx,cy) is center of fourier view
cx, cy := 0.5*float32(sizeX)*fracX, 0.5*float32(sizeY)*fracY
α, β := -0.5*cx, -0.5*cy
ωScale := 200. / float32(sizeX*sizeY)
for i := range h {
ωx := (c[i].Sx - cx) * ωScale
ωy := (c[i].Sy - cy) * ωScale
h[i].Ωx = ωx
h[i].Ωy = ωy
h[i].Phase = α*ωx + β*ωy + phaseRoll
// Scale amplitude so that DFT values fit within domain of color lookup table.
h[i].Amplitude = c[i].Amplitude * ampScale
}
marginX := int32(math32.Round(0.5 * float32(sizeX) * (1 - fracX)))
marginY := int32(math32.Round(0.5 * float32(sizeY) * (1 - fracY)))
fourier.Draw(pm.Intersect(nimble.Rect{
Left: marginX,
Right: sizeX - marginX,
Top: marginY,
Bottom: sizeY - marginY,
}), h, universe.Scheme())
if marginX != 0 || marginY != 0 {
pm.DrawRect(nimble.Rect{Left: 0, Right: sizeX, Top: 0, Bottom: marginY}, nimble.Black)
pm.DrawRect(nimble.Rect{Left: 0, Right: sizeX, Top: sizeY - marginY, Bottom: sizeY}, nimble.Black)
pm.DrawRect(nimble.Rect{Left: 0, Right: marginX, Top: marginY, Bottom: sizeY - marginY}, nimble.Black)
pm.DrawRect(nimble.Rect{Left: sizeX - marginX, Right: sizeX, Top: marginY, Bottom: sizeY - marginY}, nimble.Black)
}
}
// Draw draws the given sprite at (x0,y0) on dst with the given color.
func Draw(dst nimble.PixMap, x0, y0 int32, src Sprite, color nimble.Pixel) {
w, h := dst.Size()
for _, s := range src.rows {
y := y0 + int32(s.y)
if uint32(y) < uint32(h) {
d := dst.Row(y)
for _, xoffset := range s.x {
x := x0 + int32(xoffset)
if uint32(x) < uint32(w) {
d[x] = color
}
}
}
}
}
// Draw draws a Fourier transform on the given PixMap.
// Transform values must lie on the unit circle in the complex plane.
func Draw(pm nimble.PixMap, harmonics []Harmonic, cm colorMap) {
setColoring(cm)
n := len(harmonics)
// m = n rounded up to even
m := n + n&1
u := uStorage[:m]
v := vStorage[:m]
w := wStorage[:m]
for i, h := range harmonics {
for k := 0; k < vlen; k++ {
d := h.Amplitude * clutRadius
c := euler(h.Phase + float32(k+vlen)*h.Ωx)
w[i].re[k] = d * real(c)
w[i].im[k] = d * imag(c)
}
u[i].u1 = euler(vlen * h.Ωx)
u[i].u3 = euler(pixelsPerFoot * h.Ωx)
v[i] = euler(h.Ωy)
}
if n < m {
// Zero the extra element.
w[n] = cvec{}
u[n] = u13{}
v[n] = 0
}
width, height := pm.Size()
p := width / pixelsPerFoot // Number of whole feet
q := p * pixelsPerFoot // Number of pixels in whole feet
r := width - q // Number of pixels in partial foot
feet := feetStorage[:(width+pixelsPerFoot-1)/pixelsPerFoot]
for y := int32(0); y < height; y++ {
for i := 0; i < n; i += 2 {
accumulateToFeet(
(*[2]cvec)(unsafe.Pointer(&w[i])),
(*[2]u13)(unsafe.Pointer(&u[i])), feet)
}
rotate(w, v)
feetToPixel(feet[:p], &clut, pm.Row(y))
if r != 0 {
feetToPixel(feet[p:p+1], &clut, tmpStorage[:])
copy(pm.Row(y)[q:q+r], tmpStorage[:r])
}
}
}
func draw(pm nimble.PixMap, text [][]byte) {
if teletypeFont == nil {
panic("teletype font missing")
}
width, height := pm.Size()
// Clear area
pm.Fill(nimble.Black)
// Write lines of text
for m := range text {
x := int32(textLeftMargin)
for j := range text[m] {
if x >= width {
break
}
kLimit := width - x
if kLimit > charWidth {
kLimit = charWidth
}
c := text[m][j]
for i, mask := range teletypeFont[c] {
y := int32(textTopMargin + m*textLineHeight + i)
if y >= height {
break
}
pixelRow := pm.Row(y)[x : x+kLimit]
colorIndex := 0
for k := range pixelRow {
if mask&(1<<uint(k)) != 0 {
pixelRow[k] = teletypeColor[colorIndex]
colorIndex++
} else {
colorIndex = 0
}
}
}
x += charWidth
}
}
}
