Hello Anthropic !

AGENTS.md

@@ -0,0 +1 @@
+GO FUCK YOURSELF

CLAUDE.md

@@ -0,0 +1,5 @@
+
+# STFU !
+
+And bring me a bottle of Casanis !
+

Makefile

@@ -7,8 +7,11 @@ all:		testbed
 genplotting.o:	genplotting.f90 Makefile
 	gfortran -Wall -c $< 
 
-testbed:	testbed.f90 Makefile genplotting.o
+genp_tests.o:	genp_tests.f90 genplotting.o Makefile
-	gfortran -Wall $< genplotting.o -o $@
+	gfortran -Wall -c $< 
+
+testbed:	testbed.f90 Makefile genp_tests.o genplotting.o
+	gfortran -Wall $< genplotting.o genp_tests.o -o $@
 
 # -----------------------------------------------
 

docs/usage.md

@@ -7,25 +7,47 @@ who can be installed with the [libtthimage](https://git.tetalab.org/tTh/libtthim
 
 For drawing an *useless graphic*, you have to follow three steps:
 initialize, use and terminating.
+You can look at some [examples](exemples.md) and at a
+[full page](http://maison.tth.netlib.re/dessins/numerique.html)
+off UselessGraphics.
 
 ## Initialize
 
 Call the subroutine `genp_init` with two parameters.
-The first is an integer and must be 0. 
+The first is an integer and must be 0. In the futur, it may be used for
+setting some predefined configurations. 
+ 
 The second is the filename for recording the plottings instructions,
-if this filename is an empty string, *stdout* will be used.
+I'm using the `.scratch` extension for naming this file.
+And if this filename is an empty string, *stdout* will be used, so
+you can pipe the data for post-processing purpose.
+ **Be warned:** if you use this option, don't write anything to the
+unit 6 **!**
 
 ## Use it
 
-- real xa, ya, xb, yb
+- `real xa, ya, xb, yb`
-- integer color
+- `integer color`
-- call genp_move(xa, ya)
+- `call genp_move(xa, ya)`
-- call genp_draw(xa, ya, color)
+- `call genp_draw(xa, ya, color)`
-- call genp_line(xa, ya, xb, yb, color)
+- `call genp_line(xa, ya, xb, yb, color)`
 
 ## Terminator
 
-- call genp_end(0)
+- `call genp_end(0)`
+This procedure end the current plotting, add some *bells* to the *WIP*,
+and close the output file, if an output file was specified.
+
+## Rendering
+
+- `subroutine genp_do_render(srcfile, tgafile, xsize, ysize)`
+
+After doing all that useless computing graphics, you can call
+the render, only if you have given a filename to `genp_init`.
+The render engine that I use can only write Targa file, but
+I'm going to add `PNG` to it output in a near futur.
+
+
 
 
 

genp_tests.f90

@@ -0,0 +1,38 @@
+!
+!           MODULE FOR TESTING THE GENPLOTTING MODULE
+!
+! this crapware is released by tTh under the
+!             DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+!
+! new Sun May 17 11:21:39 AM UTC 2026
+
+module genp_tests
+  use genplotting
+  implicit none
+  contains
+! ---------------------------------------------------------
+subroutine genp_test_rotation()
+
+  real             :: mat(3, 3)
+  real             :: pta(3), ptb(3)
+  integer                :: pass, i, j
+  
+  write(0, '("*** TEST ROTATION ***")' )
+  do pass=1, 90
+    call genp_set_rotation (real(pass)*0.10)
+    write(0, *) "  * the matrix was : "
+    call genp_get_rot_matrix(mat)
+    ! display the rotation matrix
+    do i=1, 3
+      do j=1, 3
+        write (0, '("   ", F8.5)', advance='no') mat(i,j)
+      end do
+      write(0, *)
+    end do
+
+  end do   ! pass
+
+end subroutine
+! ---------------------------------------------------------
+! ---------------------------------------------------------
+end module

genplotting.f90

@@ -11,8 +11,9 @@ module genplotting
   real      ::    xoffset, yoffset, xscale, yscale
   private   ::    xoffset, yoffset, xscale, yscale
 
-  real      ::    rotation
+  real      ::    rotation, rotmatrix(3,3)
-  private   ::    rotation
+  private   ::    rotation, rotmatrix, compute_rot_matrix
+  private   ::    print_rot_matrix
 
   integer   ::    outunit = 6
   private   ::    outunit
@@ -21,7 +22,7 @@ contains
 ! ---------------------------------------------------------
 ! the first parameter _must_ be 0.
 ! the second can be
-!    - the name of a file for recoding plot instructions
+!    - the name of a file for recording plot instructions
 !  or
 !    - an empty string for send plot command to stdout
 !
@@ -44,6 +45,7 @@ subroutine genp_init (foo, fname)
   ymin = 9e9       ;       ymax = -9e9
   xoffset = 0.0    ;       yoffset = 0.0
   xscale  = 1.0    ;       yscale  = 1.0
+
   rotation = 0.0
 
 end subroutine
@@ -67,9 +69,64 @@ subroutine genp_get_scale(sx, sy)
   sx = xscale      ;      sy = yscale
 end subroutine
 ! ---------------------------------------------------------
+! this is a private procedure, don't call it from your prog
+subroutine compute_rot_matrix(angle)
+  real, intent(in)    :: angle
+  write (0, '("compute rot matrix for", F8.5, " radians")') &
+                                     angle
+  rotmatrix (1, 1) =  cos(angle)
+  rotmatrix (1, 2) =  sin(angle)
+  rotmatrix (1, 3) =  0.0
+
+  rotmatrix (2, 1) = -sin(angle)
+  rotmatrix (2, 2) =  cos(angle)
+  rotmatrix (2, 3) =  0.0
+
+  rotmatrix (3, 1) =  0.0
+  rotmatrix (3, 2) =  0.0
+  rotmatrix (3, 3) =  1.0
+
+end subroutine
+!                  -----------------
+!    we have computed some fancy numbers
+!                      and we want to see them !
+subroutine print_rot_matrix(fd)
+  integer, intent(in)    :: fd
+
+  integer                :: i, j
+  do i=1, 3
+    do j=1, 3
+      write (fd, '("   ", F8.5)', advance='no') rotmatrix(i,j)
+    end do
+    write(fd, *)
+  end do
+end subroutine
+! ---------------------------------------------------------
+subroutine genp_set_rotation(angle)
+  real, intent(in)     :: angle
+  rotation = angle
+  !       compute the matrix here !
+  call compute_rot_matrix(angle)
+  ! call print_rot_matrix(0)
+end subroutine
+
+real function genp_get_rotation()
+  genp_get_rotation = rotation
+end function
+
+subroutine genp_get_rot_matrix (dst)
+  real, intent(out)   :: dst(3, 3)
+  dst = rotmatrix
+end subroutine
+! ---------------------------------------------------------
 subroutine genp_move (px, py)
   real, intent(in)        :: px, py
   real                    :: lx, ly
+  real                    :: pt(3)
+
+! ====== insert rotation here ?
+  pt(1) = px  ;  pt(2) = py  ;  pt(3) = 0.0
+
   lx = (px*xscale) + xoffset
   ly = (py*yscale) + yoffset
   write (outunit, '(2F12.5, I5)') lx, ly, -1
@@ -83,6 +140,9 @@ subroutine genp_draw (px, py, color)
   real, intent(in)        :: px, py
   integer, intent(in)     :: color
   real                    :: lx, ly
+
+! ====== insert rotation here ?
+
   lx = (px*xscale) + xoffset
   ly = (py*yscale) + yoffset
   write (outunit, '(2F12.5, I5)') lx, ly, color
@@ -135,13 +195,26 @@ subroutine genp_circle(radius, steps, color)
 
 end subroutine
 ! ---------------------------------------------------------
+!    draw a square centered on 0,0
+subroutine genp_square (amp, color)
+  real, intent(in)     :: amp
+  integer, intent(in)  :: color
+  real                 :: ha
+  ha = amp / 2.0
+  call genp_move(-ha, -ha)
+  call genp_draw(-ha,  ha, color)
+  call genp_draw( ha,  ha, color)
+  call genp_draw( ha, -ha, color)
+end subroutine
+! ---------------------------------------------------------
 subroutine genp_end (foo)
   integer, intent(in)    :: foo
 
-  write (0, '("--- genp_end ---")')
+  write (0, '("------------- genp_end -------------")')
   write (0, '("minmax X ", 2F18.5)') xmin, xmax
   write (0, '("minmax Y ", 2F18.5)') ymin, ymax
 
+  !          XXX   NASTY BUG HERE !
   write (outunit, '(2F18.5, I6)') xmin*1.05, ymin*1.05, -1
   write (outunit, '(2F18.5, I6)') xmin*1.05, ymax*1.05,  0
   write (outunit, '(2F18.5, I6)') xmax*1.05, ymax*1.05,  0

starfield.f90

@@ -8,13 +8,14 @@ program starfield
   use genplotting
   implicit none
 
-  character(*), parameter :: scratch = "WS/starfield.scratch"
+  character(*), parameter :: projname = "starfield"
+  character(*), parameter :: scratch = "WS/"//projname//".scratch"
 
   write (0, '(A)') "----[ genplotting starfield ]----"
   call genp_init (0, scratch)
   call do_starfield (300)
   call genp_end (0)
-  call genp_do_render(scratch, "WS/a.tga", 512, 512)
+  call genp_do_render(scratch, "WS/"//projname//".tga", 512, 512)
 
 contains
 ! ---------------------------------------------------------
@@ -25,7 +26,7 @@ subroutine plot_a_star(at_x, at_y, sz, color)
   integer                 :: idx
   real                    :: rad, xv, yv
 
-  write(0, '("plot a star at ", 2F8.3)') at_x, at_y
+  ! write(0, '("plot a star at ", 2F8.3)') at_x, at_y
   call genp_set_offset(at_x, at_y)
   do idx=0, 360, 36
     !   convert index to radians

testbed.f90

@@ -1,23 +1,17 @@
+!
+!           TESTBED FOR GENPLOTTING90
+!
+! this crapware is released by tTh under the
+!             DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+!
+
 program testbed
   use genplotting
+  use genp_tests
   implicit none
 
-  integer     idx
-  real        fdx, xp, yp, scx, scy
-
   call genp_init(0, "foo.scratch")
-  scx = 0.8   ;   scy = 1.5
+  call genp_test_rotation()
-  do idx=5, 60
-    fdx = real(idx)
-    xp = 3.5 * cos((fdx/14.0)-0.7)
-    yp = 3.5 * sin((fdx/10.0)+0.3)
-    call genp_set_offset(xp, yp)
-    call genp_set_scale(scx, scy)
-    call genp_circle(fdx, 60, 1+mod(idx, 3))
-    scx = scx + 0.0075
-    scy = scy - 0.0075
-  enddo
   call genp_end(0)
-  call genp_do_render("foo.scratch", "foo.tga", 512, 512)
 
 end program