User:Brian Schott/code/tankOpengl

From J Wiki
Jump to: navigation, search

This is a partial revision of Alex Kornilovski's tank simulation that worked for J504 but not for J601.


download a script: File:Tank0.ijs
I have revised the previously revised tank.ijs script. It seems to work for now but has a bad perspective feel because of the scaling involved, I think. Some of the sensitive parameters are the following.
GS_PERSPECTIVE
GS_UNITSTEP
GS_UNITSCALE
GS_UNITROT

My adjustments required redefining three _jzopenglutil_ verbs: gsinit_jzopenglutil_, gsfly_jzopenglutil_, and gskeys_jzopenglutil_. These revised verbs are near the bottom of the script. The main changes to the first two verbs involves activating the global GS_VIEWLINE.

In gskeys_jzopenglutil_ I have attempted to salvage the gldemo keys somewhat, but tried to incorporate some of the control Alex wanted. The final mixture is not pretty, but is livable for now especially because the cursor keys work somewhat intuitively, and that to me is key for a tank/helicopter. To leave a bread crumb trail as to how the keys and other adjustments were made, I have left whole NB.'d lines in the script. I mostly swapped the Up/Down cursor keys with the i/o keys and reversed the shifted/unshifted functionality of the Rt/Lt keys and the k/K keys.

I left in the script slightly adjusted versions of Alex's opengl_g_char and handle_tank_keys, but neither are actually used at present in favor of the revision to gskeys_jzopenglutil_ .

Please revise and improve this code.

NB. Standalone version of the opengl demo.

require 'opengl'
cocurrent 'gldemo'
coinsert 'jzopenglutil'

OPENGL=: 0 : 0
  pc opengl closeok;
  xywh 0 0 200 150;cc g isigraph rightmove bottommove;
  pas 0 0;
  rem form end;
)

opengl_run=: 3 : 0
wd OPENGL
ogl=: ''conew'jzopengl'
demo ''
paint''
wd'pshow;'
)

opengl_close=: 3 : 0
destroy__ogl''
wd 'pclose'
)

opengl_cancel=: opengl_close

NB. =========================================================

NB. Helicopter demo by Alex Kornilovski
NB.
NB. Note that this redefines the movement keys.
NB. use the   cursor keys to move around
NB. use SHIFT cursor keys to move around FAST
NB. W,S - move Up-Down     NB. changed below
NB. Q,A - Look Up-Down     NB. changed below
NB. above was Alex's intention, below is what works here
NB. K,k - Look Up-Down
NB. o,i - move Up-Down
NB. O,I - move Up-Down FAST

NB. =========================================================
demo=: verb define
  GS_AMBIENT=: 0.75
  GS_DIFFUSE=: 0.75
  GS_SPECULAR=: 1
  Init ''
)

paint =: monad define
  gsinit GS_LIGHT,GS_BLEND
  Piller ''
  glPushMatrix''
  Ground ''
  glPopMatrix''
  DrawView ''
  NB. getnewXYZ 1    NB. this was a key flaw in my first post
  gsfini''
)


NB. =========================================================
NB. This works but is not used now
opengl_g_char=: 3 : 0
keyb=. (a.{~128+33 34 37 39 38 40),'qawsQAWS'
keyb=. (a.{~16 17 20 22 21 23 ),'qawsQAWS'  NB. May be Mac specific
keyi=. 33 34 37 39 38 40,a.i.'QAWSQAWS'
n=. keyi#~keyb=0{sysdata
0 handle_tank_key n
paint''
)

NB. =========================================================
NB. This works but is not used now
handle_tank_key=: 4 : 0 " 0
s=. x NB. ignored
k=. y

select. k

case. 37;39 do.  NB. Turn left-right
  THETA=: THETA+0.1*gschgsign 1-2*k=39
  GS_VIEWLINE=: GS_VIEWXYZ +GS_SPEED* ((cos GAMMA)*sin THETA),(sin GAMMA),-(cos GAMMA)*cos THETA

case. 38;40 do.  NB. move forward-backward
  getnewXYZ gschgsign 1-2*k=38

case. <@>49+i.10 do. NB. speed
  GS_SPEED=: GS_SPEEDS {~ k-49

case. 81;65 do.    NB. Look UP-Down
  GAMMA=: GAMMA+0.05*gschgsign 1-2*k=81
  if. GAMMA>0.48p1 do. GAMMA=: 0.48p1 end.
  if. GAMMA<_0.48p1 do. GAMMA=: _0.48p1 end.
  GS_VIEWLINE=: GS_VIEWXYZ +GS_SPEED* ((cos GAMMA)*sin THETA),(sin GAMMA),-(cos GAMMA)*cos THETA

case. 87;83 do.  NB. Move UP-Down
  GS_VIEWXYZ=: ((1{GS_VIEWXYZ)+gschgsign 1-2*k=87) (1)}GS_VIEWXYZ
  GS_VIEWLINE=: ((1{GS_VIEWLINE)+gschgsign 1-2*k=87) (1)}GS_VIEWLINE
end.
)

NB. =========================================================
Init=: verb define
  GS_VIEWLINE=: 0 0 0
  GAMMA=: THETA=: 0
  GS_VIEWXYZ=: 0 0 5
  GS_PERSPECTIVE=: 35 1 1 2000 NB. 2000 needed for some reason
  GS_UNITROT=:3
  GS_UNITSCALE=:0.2   NB. controls zoom speed
  GS_UNITSTEP=:0.25   NB. controls jkl  speed
  GS_SPEED=: 4
  PILLER=: 2042
  Gempos=: _500+?15 2$1000
  Stonepos=: _500+?15 2$1000
  Pillerpos=: _500+?15 2$1000
  TAR=: 99
)

NB. =========================================================
getnewXYZ=: verb define
  GS_VIEWXYZ=: GS_VIEWXYZ+ GS_SPEED*y*(sin THETA),0,-cos THETA
  GS_VIEWLINE=: GS_VIEWXYZ +GS_SPEED* ((cos GAMMA)*sin THETA),(sin GAMMA),-(cos GAMMA)*cos THETA
)

NB. =========================================================
Ground=: 3 : 0
  nStep=. 30

  gscolor 0,255,0
  glNormal 0,1,0
  glBegin GL_LINES

  r=. _500+20*i. 1+ >.1000%20
  h=. r , each <0 _500
  s=. h ,each r, each <0 500
  s=. ((2*#h),3)$,>s

  glVertex s

  h=. (<500 0) ,each r
  s=. h,each (<_500 0), each r
  s=. ((2*#h),3)$,>s

  glVertex s


  glEnd ''
)

NB. =========================================================
DrawView=: verb define

  for_j. i.#Gempos do.
    glPushMatrix ''
    glTranslate ((<j,0){Gempos) ,22,(<j,1){Gempos
    glScale _5+30 30 30
    gsdrawdodecahedron''
    glPopMatrix ''
  end.

  for_j. i.#Stonepos do.
    glPushMatrix ''
    glTranslate ((<j,0){Stonepos) ,20,(<j,1){Stonepos
    glScale _5+30 30 30
    gsdrawicosahedron ''
    glPopMatrix ''
  end.

  for_j. i.#Pillerpos do.
    glPushMatrix ''
    glTranslate ((<j,0){Pillerpos) ,20,(<j,1){Pillerpos
    glCallList PILLER
    glPopMatrix ''
  end.
)

NB. =========================================================
Piller=: verb define
  QUADS=: {.>gluNewQuadric''
  vNormal=. 1
  fStep=. o.1%4
  fHeight=. 20
  fRadius=. 5

  gsnewlist PILLER
  glPushMatrix ''
  gscolor 100,0,228
  glBegin GL_QUAD_STRIP
  vNormal=. gsunitnormal fRadius,fHeight,0
  glNormal vNormal
  glVertex fRadius,fHeight,0
  glVertex fRadius,-fHeight,0
  for_j. fStep*i.1+>.o.3%fStep do.
    x=. fRadius*sin j
    z=. fRadius*cos j

    vNormal=. gsunitnormal x,fHeight,z
    glNormal vNormal
    glVertex x,fHeight,z
    glVertex x,(-fHeight),z

  end.
  glEnd ''

  glTranslate 0,(fHeight+fRadius%2),0
  gscolor 0,0,255
  gsdrawsphere (fRadius*2.5),20 20
  glPopMatrix ''

  gsendlist''
  gluDeleteQuadric QUADS
)


NB. =========================================================
Target=: verb define
  NB. Draw point of look
  NB. This verb has never functioned as far as I can tell

  gscolor 255,0,0
  glLineWidth 3
  glBegin GL_LINES

  new=. GS_VIEWXYZ +GS_SPEED* ((cos GAMMA)*sin THETA+0.02),(sin GAMMA),-(cos GAMMA)*cos THETA+0.02
  new1=. GS_VIEWXYZ +GS_SPEED* ((cos GAMMA)*sin THETA-0.02),(sin GAMMA),-(cos GAMMA)*cos THETA-0.02
  glVertex 2 3$GS_VIEWLINE,new
  glVertex 2 3$GS_VIEWLINE,new1

  new=. GS_VIEWXYZ +GS_SPEED* ((cos GAMMA+0.02)*sin THETA),(sin GAMMA+0.02),-(cos GAMMA+0.02)*cos THETA
  new1=. GS_VIEWXYZ +GS_SPEED* ((cos GAMMA-0.02)*sin THETA),(sin GAMMA-0.02),-(cos GAMMA-0.02)*cos THETA
  glVertex 2 3$GS_VIEWLINE,new
  glVertex 2 3$GS_VIEWLINE,new1
  glEnd ''
  glLineWidth 1
)

gsdrawsphere =: 3 : 0
  obj=. QUADS
  gluQuadricDrawStyle obj,GLU_FILL
  gluQuadricNormals obj,GLU_SMOOTH
  gluSphere <&> obj,y
)

NB. =========================================================
opengl_g_paint=: gspaint
opengl_g_char=: gschar
opengl_default=: gsdefault
NB. =========================================================

gsfly_jzopenglutil_=: 4 : 0
  rot=. (rfd x) gsrotxyz y
  GS_VIEWXYZ=: rot gsmp GS_VIEWXYZ
  GS_VIEWUP=: rot gsmp GS_VIEWUP
  GS_VIEWLINE=: rot gsmp GS_VIEWLINE
)

gskey_jzopenglutil_=: 4 : 0
  select. y
  case. 33;34 do.
    ((x { 1 5) * GS_SPEED*GS_UNITROT gschgsign y=34) gsfly GS_VIEWXYZ
    NB. case. 37;39 do.
    NB.   ((x { 1 5) * GS_SPEED*GS_UNITROT gschgsign y=37) gsfly GS_VIEWUP
  case. 37;39 do.
    ((x { 1 5) * GS_SPEED*GS_UNITROT gschgsign y=39) gsfly GS_VIEWUP
    NB. case. 38;40 do.
    NB.   ((x { 1 5) * GS_SPEED*GS_UNITROT gschgsign y=40) gsfly GS_VIEWXYZ gscross GS_V IEWUP
  case. 73;79 do.
    ((x { 1 5) * GS_SPEED*GS_UNITROT gschgsign y=73) gsfly GS_VIEWXYZ gscross GS_VIEWUP
  case. 88;89;90 do.
    b=. y=88 89 90
    (b i. 1) gsrotate GS_SPEED*GS_UNITROT * b gschgsign x
    NB. case. 73;79 do. gszoom (>:GS_SPEED*GS_UNITSCALE) ^ {. (x { 1 5) gschgsign y=73
  case. 38;40 do. gszoom (>:GS_SPEED*GS_UNITSCALE) ^ {. (x { 1 5) gschgsign y=38
  case. 74;75;76 do.
    gstranslate GS_SPEED*GS_UNITSTEP * (y=74 75 76) gschgsign x
  case. <@>49+i.10 do.
    GS_SPEED=: GS_SPEEDS {~ y-49
  end.
)

gsinit_jzopenglutil_ =: 3 : 0

  res=. rc__ogl''
  if. res do.

    glEnable GL_DEPTH_TEST
    glViewport 0 0,wh__ogl
    glMatrixMode GL_PROJECTION
    glLoadIdentity''
    gluPerspective (%/wh__ogl) 1 } GS_PERSPECTIVE

    if. GS_LIGHT e. y do.
      id=. GL_LIGHT0
      glaLight id, GL_AMBIENT, gscolor4 GS_AMBIENT
      glaLight id, GL_DIFFUSE, gscolor4 GS_DIFFUSE
      glaLight id, GL_SPECULAR, gscolor4 GS_SPECULAR
      glEnable GL_LIGHTING
      glEnable id
      if. GS_COLORMATERIAL do.
        glEnable GL_COLOR_MATERIAL
        glColorMaterial GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE
        glaMaterial GL_FRONT_AND_BACK,GL_SPECULAR, alpha4 GS_MATSPECULAR
        glaMaterial GL_FRONT_AND_BACK,GL_SHININESS, alpha4 GS_SHININESS
      end.
      if.
        #GS_POSITION do.
        glaLight id,GL_POSITION, alpha4 GS_POSITION
      end.
    end.

    if.  GS_BLEND e.  y do.
      glEnable GL_BLEND
      glBlendFunc GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA
    end.

  else.
    current__ogl ''
  end.
  gsclearcolor GS_CLEARCOLOR
  glClear GL_COLOR_BUFFER_BIT + GL_DEPTH_BUFFER_BIT
  gscolor GS_COLOR

  glMatrixMode GL_MODELVIEW
  glLoadIdentity''
  gluLookAt GS_VIEWXYZ,GS_VIEWLINE,GS_VIEWUP
  glTranslate GS_TRNXYZ
  glRotate GS_ROTNDX { GS_ROTXYZ ,.  GS_ID3

  res
)

opengl_run''