puts "========"
puts "0029290: Visualization, TKOpenGl - allow defining Light source per ZLayer"
puts "========"

pload MODELING VISUALIZATION

vclear
vclose ALL
vinit View1 -width 1024 -height 768

vaxo
vcaps -ffp 0
vrenderparams -shadingModel phong
vlight clear

set THE_LIGHTS {
  { -1 -1 -1 RED1 }
  {  1 -1 -1 YELLOW }
  { -1  1 -1 BLUE }
  { -1 -1  1 CYAN }
  {  1  1 -1 PURPLE }
  {  1  1  1 WHITE }
  { -1  1  1 HOTPINK }
  {  1 -1  1 GREEN }
  {  0 -1  0 MAGENTA }
  {  0  1  0 MAGENTA3 }
}

set aLayers [list [vzlayer -add -disable depthClear] [vzlayer -add -disable depthClear] [vzlayer -add -disable depthClear]]
for { set aLayIter 0 } { $aLayIter < 3 } { incr aLayIter } {
  set aLayer [lindex $aLayers $aLayIter]
  set aShiftX [expr $aLayIter * 4]
  psphere s$aLayer 0.5
  vdisplay -dispMode 1 -layer $aLayer s$aLayer
  vsetlocation s$aLayer $aShiftX 0 0
  for { set aLightIter 0 } { $aLightIter < 10 } { incr aLightIter } {
	set aLight [lindex $THE_LIGHTS $aLightIter]
    set aColor [lindex $aLight 3]
    set aPos [list [expr $aShiftX + [lindex $aLight 0]] [lindex $aLight 1] [lindex $aLight 2]]
    vlight -layer $aLayer -add positional -pos {*}$aPos -color $aColor -headLight 0
    vpoint v${aLayIter}_${aLightIter} {*}$aPos
    vdrawtext t${aLayIter}_${aLightIter} "l${aLayIter}_${aLightIter} $aColor" -pos {*}$aPos -color $aColor
  }
}
vfit
vdump $::imagedir/${::casename}.png