diff options
Diffstat (limited to 'tex/context/base/mkiv/grph-trf.lua')
| -rw-r--r-- | tex/context/base/mkiv/grph-trf.lua | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/grph-trf.lua b/tex/context/base/mkiv/grph-trf.lua new file mode 100644 index 000000000..f476ec692 --- /dev/null +++ b/tex/context/base/mkiv/grph-trf.lua @@ -0,0 +1,125 @@ +if not modules then modules = { } end modules ['grph-trf'] = { + version = 1.001, + comment = "companion to grph-trf.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- see grph-trf-todo.lua for older preliminary code for the rest + +local sind, cosd, tand, abs = math.sind, math.cosd, math.tand, math.abs + +local texsetdimen = tex.setdimen + +local function analyzerotate(rotation,width,height,depth,total,notfit,obeydepth) + -- + -- print(rotation,width,height,depth,notfit,obeydepth) + -- + local sin = sind(rotation) + local cos = cosd(rotation) + local abssin = abs(sin) + local abscos = abs(cos) + local xsize = 0 + local ysize = 0 + local xposition = 0 + local yposition = 0 + local xoffset = 0 + local yoffset = 0 + local newwidth = width + local newheight = height + local newdepth = depth + -- print(sin,cos) + if sin > 0 then + if cos > 0 then + xsize = cos * width + sin * total + ysize = sin * width + cos * total + yposition = cos * total + if notfit then + xoffset = - sin * height + newwidth = sin * depth + cos * width + else + newwidth = xsize + xposition - xoffset + end + if obeydepth then + yoffset = cos * depth + end + newheight = ysize - yoffset + newdepth = yoffset + -- print("case 1, done") + else + xsize = abscos * width + sin * total + ysize = sin * width + abscos * total + xposition = abscos * width + if notfit then + xoffset = - xsize + sin * depth + end + if obeydepth then + yoffset = abscos * height + newwidth = abssin * total + abscos * width + xoffset + else + newwidth = xsize + end + newheight = ysize - yoffset + newdepth = yoffset + -- print("case 2, done") + end + else + if cos < 0 then + xsize = abscos * width + abssin * total + ysize = abssin * width + abscos * total + xposition = xsize + yposition = abssin * width + if notfit then + xoffset = - xsize + abssin * height + end + if obeydepth then + yoffset = ysize + cos * depth + end + newwidth = notfit and (abssin * height) or xsize + newheight = ysize - yoffset + newdepth = yoffset + -- print("case 3, done") + else + xsize = cos * width + abssin * total + ysize = abssin * width + cos * total + xposition = abssin * total + yposition = cos * total + if notfit then + xoffset = - abssin * depth + newwidth = xsize + xoffset + else + newwidth = xsize + end + if obeydepth then + yoffset = cos * depth + end + newheight = ysize - yoffset + sin * width + newdepth = yoffset - sin * width + -- print("case 4, done") + end + end + texsetdimen("d_grph_rotate_x_size", xsize) + texsetdimen("d_grph_rotate_y_size", ysize) + texsetdimen("d_grph_rotate_x_position", xposition) + texsetdimen("d_grph_rotate_y_position", yposition) + texsetdimen("d_grph_rotate_x_offset", xoffset) + texsetdimen("d_grph_rotate_y_offset", yoffset) + texsetdimen("d_grph_rotate_new_width", newwidth) + texsetdimen("d_grph_rotate_new_height", newheight) + texsetdimen("d_grph_rotate_new_depth", newdepth) +end + +interfaces.implement { + name = "analyzerotate", + actions = analyzerotate, + arguments = { + "integer", + "dimension", + "dimension", + "dimension", + "dimension", + "conditional", + "conditional", + }, +} |