add rotation, need more tests
This commit is contained in:
Tonton Th
7
Makefile
7
Makefile
@@ -7,8 +7,11 @@ all: testbed
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genplotting.o: genplotting.f90 Makefile
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gfortran -Wall -c $<
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testbed: testbed.f90 Makefile genplotting.o
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gfortran -Wall $< genplotting.o -o $@
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genp_tests.o: genp_tests.f90 genplotting.o Makefile
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gfortran -Wall -c $<
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testbed: testbed.f90 Makefile genp_tests.o genplotting.o
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gfortran -Wall $< genplotting.o genp_tests.o -o $@
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# -----------------------------------------------
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41
genp_tests.f90
Normal file
41
genp_tests.f90
Normal file
@@ -0,0 +1,41 @@
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!
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! MODULE FOR TESTING THE GENPLOTTING MODULE
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!
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! this crapware is released by tTh under the
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! DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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!
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! new Sun May 17 11:21:39 AM UTC 2026
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module genp_tests
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use genplotting
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implicit none
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contains
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! ---------------------------------------------------------
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subroutine genp_test_rotation()
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real :: mat(3, 3)
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real :: pta(3), ptb(3)
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integer :: pass, i, j
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write(0, '("*** TEST ROTATION ***")' )
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do pass=1, 90
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call genp_set_rotation (real(pass)*0.10)
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write(0, *) " * the matrix was : "
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call genp_get_rot_matrix(mat)
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do i=1, 3
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do j=1, 3
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write (0, '(" ", F8.5)', advance='no') mat(i,j)
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end do
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write(0, *)
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end do
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call genp_move(0.0, 0.0)
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pta(1) = 11.0 ; pta(2) = 0.0 ; pta(3) = 0.0
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ptb = matmul(mat, pta)
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write(0, '(" got XY: ", F8.5, " ", F8.5)') ptb(1), ptb(2)
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call genp_draw(ptb(1), ptb(2), 1+mod(pass, 7))
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end do ! pass
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end subroutine
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! ---------------------------------------------------------
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end module
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@@ -11,8 +11,9 @@ module genplotting
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real :: xoffset, yoffset, xscale, yscale
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private :: xoffset, yoffset, xscale, yscale
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real :: rotation
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private :: rotation
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real :: rotation, rotmatrix(3,3)
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private :: rotation, rotmatrix, compute_rot_matrix
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private :: print_rot_matrix
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integer :: outunit = 6
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private :: outunit
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@@ -21,7 +22,7 @@ contains
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! ---------------------------------------------------------
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! the first parameter _must_ be 0.
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! the second can be
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! - the name of a file for recoding plot instructions
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! - the name of a file for recording plot instructions
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! or
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! - an empty string for send plot command to stdout
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!
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@@ -44,6 +45,7 @@ subroutine genp_init (foo, fname)
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ymin = 9e9 ; ymax = -9e9
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xoffset = 0.0 ; yoffset = 0.0
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xscale = 1.0 ; yscale = 1.0
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rotation = 0.0
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end subroutine
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@@ -67,6 +69,56 @@ subroutine genp_get_scale(sx, sy)
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sx = xscale ; sy = yscale
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end subroutine
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! ---------------------------------------------------------
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! this is a private procedure, don't call it from your prog
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subroutine compute_rot_matrix(angle)
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real, intent(in) :: angle
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write (0, '("compute rot matrix for", F8.5, " radians")') &
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angle
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rotmatrix (1, 1) = cos(angle)
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rotmatrix (1, 2) = sin(angle)
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rotmatrix (1, 3) = 0.0
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rotmatrix (2, 1) = -sin(angle)
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rotmatrix (2, 2) = cos(angle)
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rotmatrix (2, 3) = 0.0
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rotmatrix (3, 1) = 0.0
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rotmatrix (3, 2) = 0.0
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rotmatrix (3, 3) = 1.0
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end subroutine
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! -----------------
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! we have computed some fancy numbers
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! and we want to see them !
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subroutine print_rot_matrix(fd)
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integer, intent(in) :: fd
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integer :: i, j
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do i=1, 3
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do j=1, 3
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write (fd, '(" ", F8.5)', advance='no') rotmatrix(i,j)
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end do
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write(fd, *)
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end do
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end subroutine
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! ---------------------------------------------------------
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subroutine genp_set_rotation(angle)
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real, intent(in) :: angle
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rotation = angle
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! compute the matrix here !
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call compute_rot_matrix(angle)
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! call print_rot_matrix(0)
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end subroutine
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real function genp_get_rotation()
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genp_get_rotation = rotation
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end function
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subroutine genp_get_rot_matrix (dst)
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real, intent(out) :: dst(3, 3)
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dst = rotmatrix
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end subroutine
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! ---------------------------------------------------------
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subroutine genp_move (px, py)
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real, intent(in) :: px, py
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real :: lx, ly
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@@ -138,7 +190,7 @@ end subroutine
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subroutine genp_end (foo)
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integer, intent(in) :: foo
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write (0, '("--- genp_end ---")')
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write (0, '("------------- genp_end -------------")')
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write (0, '("minmax X ", 2F18.5)') xmin, xmax
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write (0, '("minmax Y ", 2F18.5)') ymin, ymax
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25
testbed.f90
25
testbed.f90
@@ -1,23 +1,18 @@
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!
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! TESTBED FOR GENPLOTTING90
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!
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! this crapware is released by tTh under the
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! DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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!
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program testbed
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use genplotting
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use genp_tests
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implicit none
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integer idx
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real fdx, xp, yp, scx, scy
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call genp_init(0, "foo.scratch")
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scx = 0.8 ; scy = 1.5
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do idx=5, 60
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fdx = real(idx)
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xp = 3.5 * cos((fdx/14.0)-0.7)
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yp = 3.5 * sin((fdx/10.0)+0.3)
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call genp_set_offset(xp, yp)
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call genp_set_scale(scx, scy)
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call genp_circle(fdx, 60, 1+mod(idx, 3))
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scx = scx + 0.0075
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scy = scy - 0.0075
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enddo
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call genp_test_rotation()
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! call genp_plot_axes(5.1)
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call genp_end(0)
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call genp_do_render("foo.scratch", "foo.tga", 512, 512)
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end program
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