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/*
* Copyright 2006-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
*/
/*
* cylindrical projection model
*/
x : m_view - c_view$
y : tan(c_nick - m_nick)$
x_rot : y * sin(c_tilt) + x * cos(c_tilt)$
y_rot : y * cos(c_tilt) - x * sin(c_tilt)$
x_scale : x_rot * scale$
y_scale : y_rot * scale$
/*
* Some mangling for C code generation
*/
load("expr2c.mac")$
x_expand : trigexpand(x_scale)$
y_expand : trigexpand(y_scale)$
args: "double c_view, double c_nick, double c_tilt, double scale, double k0, double k1, double x0, double m_view, double m_nick"$
expr2c("ProjectionCylindrical::mac_x", args, x_expand)$
expr2c("ProjectionCylindrical::mac_y", args, y_expand)$
expr2c("ProjectionCylindrical::mac_x_dc_view", args, diff(x_expand, c_view))$
expr2c("ProjectionCylindrical::mac_x_dc_nick", args, diff(x_expand, c_nick))$
expr2c("ProjectionCylindrical::mac_x_dc_tilt", args, diff(x_expand, c_tilt))$
expr2c("ProjectionCylindrical::mac_x_dscale", args, diff(x_expand, scale))$
expr2c("ProjectionCylindrical::mac_y_dc_view", args, diff(y_expand, c_view))$
expr2c("ProjectionCylindrical::mac_y_dc_nick", args, diff(y_expand, c_nick))$
expr2c("ProjectionCylindrical::mac_y_dc_tilt", args, diff(y_expand, c_tilt))$
expr2c("ProjectionCylindrical::mac_y_dscale", args, diff(y_expand, scale))$
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