Add support for #declares

[mcorbe]

I came across the same issue as #25 and gave it a shot.

It enables to do stuff like this:

#include "math.inc"
#include "finish.inc"
#include "transforms.inc"

background {color rgb 1}

light_source {
  <-500,500,400> 
  rgb 1
  shadowless        
}

global_settings {
  assumed_gamma 2
}

#declare __ascii__ = mesh {
  [..]
}
#declare Min_ext = min_extent(__ascii__);
#declare Max_ext = max_extent(__ascii__);

#declare X_len = Max_ext.x - Min_ext.x;
#declare Y_len = Max_ext.y - Min_ext.y;
#declare Z_len = Max_ext.z - Min_ext.z;

#declare Radius = max(X_len / atan(pi / 5), Y_len / atan(pi / 5), Z_len / atan(pi / 5));
#declare Theta = -pi / 2 * pow(2.71828, -Y_len / X_len);
#declare Phi = -pi / 2 * pow(2.71828, -Z_len / 2 / (X_len + Y_len));

#declare X_offset = Min_ext.x + X_len / 2;
#declare Y_offset = Min_ext.y + Y_len / 2;
#declare Z_offset = Min_ext.z;

#declare X_pos = Radius * sin(Theta) * cos(Phi) + X_offset;
#declare Y_pos = Radius * sin(Theta) * sin(Phi) + Y_offset;
#declare Z_pos = Radius * cos(Theta) + Z_offset;

#declare look_at_z = (Max_ext.z - Min_ext.z) / 4;

#debug concat("radius:", str(Radius, 5, 0))
#debug concat("theta:", str(Theta, 5, 0))
#debug concat("phi:", str(Phi, 5, 0))
#debug concat("look_at:", str(look_at_z, 5, 0))

camera {
  orthographic
  location <X_pos, Y_pos, Z_pos>
  sky <0, 0, 1>
  look_at <X_offset, Y_offset, look_at_z>
}

sky_sphere
{
    pigment
    {
        gradient y
        color_map
        {
            [0.0 rgb <1.0,1.0,1.0>]     //153, 178.5, 255   //150, 240, 192
            [0.7 rgb <0.9,0.9,0.9>]     //  0,  25.5, 204   //155, 240, 96
        }
        scale 2
        translate 1
    }
}

object {
  __ascii__
  texture {
    pigment {color <1,1,1>}
    finish {phong 0.0}
  }
}

[mcorbe]

ping

[mcorbe]

ping

[mcorbe]

Thanks @Zulko, you also probably close #25.

[DerOzean]

Hey Guys,
#25
i don't get it, how to create a spline/cable/wire, I just don't understand how I should create such a class
It would be great if you could help me
Or are there otherways to combine povray with a video, I just want that images I created in an video ^^