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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 isdimen = tex.isdimen
local setdimension = tex.setdimensionvalue
local d_grph_rotate_x_size = isdimen("d_grph_rotate_x_size")
local d_grph_rotate_y_size = isdimen("d_grph_rotate_y_size")
local d_grph_rotate_x_position = isdimen("d_grph_rotate_x_position")
local d_grph_rotate_y_position = isdimen("d_grph_rotate_y_position")
local d_grph_rotate_x_offset = isdimen("d_grph_rotate_x_offset")
local d_grph_rotate_y_offset = isdimen("d_grph_rotate_y_offset")
local d_grph_rotate_new_width = isdimen("d_grph_rotate_new_width")
local d_grph_rotate_new_height = isdimen("d_grph_rotate_new_height")
local d_grph_rotate_new_depth = isdimen("d_grph_rotate_new_depth")
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
setdimension("d_grph_rotate_x_size", xsize)
setdimension("d_grph_rotate_y_size", ysize)
setdimension("d_grph_rotate_x_position", xposition)
setdimension("d_grph_rotate_y_position", yposition)
setdimension("d_grph_rotate_x_offset", xoffset)
setdimension("d_grph_rotate_y_offset", yoffset)
setdimension("d_grph_rotate_new_width", newwidth)
setdimension("d_grph_rotate_new_height", newheight)
setdimension("d_grph_rotate_new_depth", newdepth)
end
interfaces.implement {
name = "analyzerotate",
actions = analyzerotate,
arguments = {
-- "integer",
"number",
"dimension",
"dimension",
"dimension",
"dimension",
"conditional",
"conditional",
},
}
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