// interior layout is part of doubleLayout.
// It creates a second form inside the middle section of the first form.
func (fm *fmtag) interiorLayout(eng vu.Eng, s form.Section) *layout {
lo := &layout{}
w, h := s.Size()
iw, ih := int(lin.Round(w, 0)), int(lin.Round(h, 0))
plan := []string{
"pqr",
"pqr",
"stu",
}
lo.form = form.New(plan, iw, ih, "gap 5 5")
lo.visualize(eng)
return lo
}
// remCore removes the energy core from the minimap.
func (mm *minimap) remCore(gamex, gamez float64) {
scale := mm.scale
gx, gz := lin.Round(gamex, 0)*scale, lin.Round(gamez, 0)*scale
for index, core := range mm.cores {
cx, _, cz := core.Location()
cx, cz = lin.Round(cx, 0), lin.Round(cz, 0)
if cx == gx && cz == gz {
core.Dispose(vu.POV)
mm.cores = append(mm.cores[:index], mm.cores[index+1:]...)
return
}
}
logf("hud.mapOverlay.remCore: failed to remove a core.")
}
// Screen applies the camera transform on a 3D point in world space wx, wy, wz
// and returns the 2D screen coordinate sx, sy. The window width and height
// ww, wh are also needed. Essentially the reverse of the Ray method and
// duplicates what is done in the rendering pipeline.
func (c *camera) Screen(wx, wy, wz float64, ww, wh int) (sx, sy int) {
vec := c.v0.SetS(wx, wy, wz, 1)
vec.MultvM(vec, c.vm) // apply view matrix.
vec.MultvM(vec, c.pm) // apply projection matrix.
clipx := vec.X*0.5/vec.W + 0.5 // convert to range 0:1
clipy := vec.Y*0.5/vec.W + 0.5 // convert to range 0:1
clipz := vec.Z*0.5/vec.W + 0.5 // convert to range 0:1
if clipx < 0 || clipx > 1 || clipy < 0 || clipy > 1 || clipz < 0 || clipz > 1 {
return -1, -1 // outside the screen area.
}
sx = int(lin.Round(clipx*float64(ww), 0))
sy = int(lin.Round(clipy*float64(wh), 0))
return sx, sy
}
// resize informs the panel of the size change and updates the visual components
// to match the new cell sizes.
func (lo *layout) resize(ww, wh int) {
lo.form.Resize(ww, wh)
for cnt, sect := range lo.form.Sections() {
x, y, w, h := sect.Bounds()
lo.sects[cnt].SetScale(w, h, 0)
lo.sects[cnt].SetLocation(x, y, 0)
lo.labels[cnt].SetLocation(x, y, 0)
}
if lo.lo != nil {
w, h := lo.form.Section("e").Size()
iw, ih := int(lin.Round(w, 0)), int(lin.Round(h, 0))
offx, offy := lo.form.Section("e").Offset()
lo.lo.resizeChild(offx, offy, iw, ih)
}
}
// Next implements Flow. Look up the direction for the given location
// and return it as a unit vector.
func (f *flow) Next(atx, aty float64) (dx, dy float64) {
gridx, gridy := int(lin.Round(atx, 0)), int(lin.Round(aty, 0))
ir := 0.7071068 // inverse root of 2: 1/math.Sqrt(2)
switch f.flowmap[gridx][gridy] {
case north:
return 0, 1
case ne:
return ir, ir
case east:
return 1, 0
case se:
return ir, -ir
case south:
return 0, -1
case sw:
return -ir, -ir
case west:
return -1, 0
case nw:
return -ir, ir
}
return 0, 0
}
func (s *section) Offset() (x, y float64) {
return lin.Round(s.x-s.w*0.5, 0), lin.Round(s.y-s.h*0.5, 0)
}
func (s *section) In(x, y int) bool {
hw, hh := lin.Round(s.w*0.5, 0), lin.Round(s.h*0.5, 0)
fx, fy := float64(x), float64(y)
return fx >= s.x-hw && fx <= s.x+hw && fy >= s.y-hh && fy <= s.y+hh
}
