Exemplo n.º 1
0
func Init(fern float64) { // called by points.Start ()
	//
	const (
		D   = 2.0 // -fache Bildschirmbreite
		nah = C.GLdouble(0.2)
	)
	if !initialized {
		initialize()
	}
	C.glMatrixMode(C.GL_PROJECTION)
	C.glLoadIdentity()
	deg := D * math.Atan((0.5/D)/scr.Proportion())
	deg /= 0.9 // experimentelle Weitwinkelkorrektur
	var m [4][4]C.GLdouble
	m[1][1] = 1.0 / C.GLdouble(math.Tan(deg)) // Cot
	m[0][0] = m[1][1] / C.GLdouble(scr.Proportion())
	//  delta:= C.GLdouble(fern) - nah
	//  m[2][2] = - (C.GLdouble(fern) + nah) / delta
	//  m[2][3] = GLdouble(-1.0)
	//  m[3][2] = -2. * nah * C.GLdouble(fern) / delta
	m[2][2] = C.GLdouble(-1.0)
	m[2][3] = C.GLdouble(-1.0)
	m[3][2] = C.GLdouble(-1.0) * nah
	C.glMultMatrixd(&m[0][0])
	//  q:= C.GLdouble(0.75)
	//  GLFrustum (-1.0 * nah, 1.0 * nah, -q * nah, q * nah, 1.0 * nah, C.GLdouble(fern))
	C.glMatrixMode(C.GL_MODELVIEW)
}
Exemplo n.º 2
0
func init() {
	//
	bMin, lMin := 12.8800, 52.2850 // x, y
	bMax, hMax := 1.0647, 0.4859   // 72, 54 km
	if scr.Proportion() > 4/3 {
		bMax = bMax / 4 * 3 * scr.Proportion()
	}
	b0, l0 := 13.2610, 52.4550
	scale.Def(b0*dB, l0*dL, 16)
	scale.Lim(bMin*dB, lMin*dL, bMax*dB, hMax*dL, 6)
	scr.SwitchTransparence(true)
	scr.MouseCursor(true)
	var bhf Bahnhof = New()
	if bhf == nil {
	}
}
Exemplo n.º 3
0
func def(x, y, w float64) {
	//
	nX, nY = float64(scr.NX()), float64(scr.NY())
	x0, y0 = x, y
	if w <= 0 {
		width = 1
	} else {
		width = w
	}
	height = width / scr.Proportion()
	xm, ym = x0+width/2, y0+height/2
	mX, mY = nX/width, nY/height
}
Exemplo n.º 4
0
func edit() {
	//
	var d uint
	c := kbd.LastCommand(&d)
	if d > 2 {
		d = 2
	}
	switch c {
	case kbd.Back:
		if width < maxWidth {
			w := width * mm[d]
			if w > maxWidth {
				w = maxWidth
			}
			dw := (w - width) / 2
			x0, y0 = x0-dw, y0-dw/scr.Proportion()
			width = w
		} else { // überschritten
			x0, y0 = xMin, yMin
			width = maxWidth
		}
		height = width / scr.Proportion()
		mX, mY = nX/width, nY/height
	case kbd.Enter:
		if width > maxWidth/maxMag {
			w := width / mm[d]
			if w < maxWidth/maxMag {
				w = maxWidth / maxMag
			}
			dw := (w - width) / 2
			x0, y0 = x0-dw, y0-dw/scr.Proportion()
			width = w
			height = width / scr.Proportion()
			mX, mY = nX/width, nY/height
		}
	case kbd.Left:
		if x0 >= xMin {
			x0 = x0 - width/nn[d]
		}
	case kbd.Right:
		if x0+width <= xMin+maxWidth {
			x0 = x0 + width/nn[d]
		}
		// TODO: Rollrad von Maus einbauen - die sendet Up/Down
	case kbd.Up:
		if y0+height < yMin+maxHeight {
			y0 = y0 + width/nn[d]
		}
	case kbd.Down:
		if y0 >= yMin {
			y0 = y0 - width/nn[d]
		}
	case kbd.This:
		x, y := scr.MousePosGr()
		y = int(scr.NY()) - y
		x0 = x0 + float64(x)/mX - width/2
		y0 = y0 + float64(y)/mY - height/2
	case kbd.There:
		x, y := scr.MousePosGr()
		xt, yt = float64(x), float64(int(scr.NY())-y)
	case kbd.Push, kbd.Thither:
		x, y := scr.MousePosGr()
		x0 = x0 - (float64(x)-xt)/mX
		y0 = y0 - (float64(int(scr.NY())-y)-yt)/mY
		xt, yt = float64(x), float64(int(scr.NY())-y)
	}
	if x0 < xMin {
		x0 = xMin
	}
	if x0+width > xMin+maxWidth {
		x0 = xMin + maxWidth - width
	}
	if y0 < yMin {
		y0 = yMin
	}
	if y0+height >= yMin+maxHeight {
		y0 = yMin + maxHeight - height
	}
}