C++ code to D (multi dem 3d mesh)

[Joel]

On Monday, 26 October 2020 at 23:38:22 UTC, Joel wrote:
> ```
> struct vec3d
> {
> 	float x, y, z;
> }
>
> struct triangle
> {
> 	vec3d[3] p;
> }
>
> struct mesh
> {
> 	triangle[] tris;
> }
>
> // This here
> meshCube.tris = {
>
> 		// SOUTH
> 		{ 0.0f, 0.0f, 0.0f,    0.0f, 1.0f, 0.0f,    1.0f, 1.0f, 0.0f 
> },
> 		{ 0.0f, 0.0f, 0.0f,    1.0f, 1.0f, 0.0f,    1.0f, 0.0f, 0.0f 
> },
>
> 		// EAST
> 		{ 1.0f, 0.0f, 0.0f,    1.0f, 1.0f, 0.0f,    1.0f, 1.0f, 1.0f 
> },
> 		{ 1.0f, 0.0f, 0.0f,    1.0f, 1.0f, 1.0f,    1.0f, 0.0f, 1.0f 
> },
>
> 		// NORTH
> 		{ 1.0f, 0.0f, 1.0f,    1.0f, 1.0f, 1.0f,    0.0f, 1.0f, 1.0f 
> },
> 		{ 1.0f, 0.0f, 1.0f,    0.0f, 1.0f, 1.0f,    0.0f, 0.0f, 1.0f 
> },
>
> 		// WEST
> 		{ 0.0f, 0.0f, 1.0f,    0.0f, 1.0f, 1.0f,    0.0f, 1.0f, 0.0f 
> },
> 		{ 0.0f, 0.0f, 1.0f,    0.0f, 1.0f, 0.0f,    0.0f, 0.0f, 0.0f 
> },
>
> 		// TOP
> 		{ 0.0f, 1.0f, 0.0f,    0.0f, 1.0f, 1.0f,    1.0f, 1.0f, 1.0f 
> },
> 		{ 0.0f, 1.0f, 0.0f,    1.0f, 1.0f, 1.0f,    1.0f, 1.0f, 0.0f 
> },
>
> 		// BOTTOM
> 		{ 1.0f, 0.0f, 1.0f,    0.0f, 0.0f, 1.0f,    0.0f, 0.0f, 0.0f 
> },
> 		{ 1.0f, 0.0f, 1.0f,    0.0f, 0.0f, 0.0f,    1.0f, 0.0f, 0.0f 
> },
>
> 		};
> ```
>
> See:
> https://youtu.be/ih20l3pJoeU
> https://github.com/OneLoneCoder/videos/blob/master/OneLoneCoder_olcEngine3D_Part1.cpp

This is what I came up with:

meshCube.tris =

         // south
         [triangle(vec3d(0f,0f,0f)), triangle(vec3d(0f,1f,0f)), 
triangle(vec3d(1f,1f,0f)),
         triangle(vec3d(0f,0f,0f)), triangle(vec3d(1f,1f,0f)), 
triangle(vec3d(1f,0f,0f)),

         // east
         triangle(vec3d(1f,0f,0f)), triangle(vec3d(1f,1f,0f)), 
triangle(vec3d(1f,1f,1f)),
         triangle(vec3d(1f,0f,0f)), triangle(vec3d(1f,1f,1f)), 
triangle(vec3d(1f,0f,1f)),

         // north
         triangle(vec3d(1f,0f,1f)), triangle(vec3d(1f,1f,1f)), 
triangle(vec3d(0f,1f,1f)),
         triangle(vec3d(1f,0f,1f)), triangle(vec3d(0f,1f,1f)), 
triangle(vec3d(0f,0f,1f)),

         // west
         triangle(vec3d(0f,0f,1f)), triangle(vec3d(0f,1f,1f)), 
triangle(vec3d(0f,1f,0f)),
         triangle(vec3d(0f,0f,1f)), triangle(vec3d(0f,1f,0f)), 
triangle(vec3d(0f,0f,0f)),

         // top
         triangle(vec3d(0f,1f,0f)), triangle(vec3d(0f,1f,1f)), 
triangle(vec3d(1f,1f,1f)),
         triangle(vec3d(0f,1f,0f)), triangle(vec3d(1f,1f,1f)), 
triangle(vec3d(1f,1f,0f)),

         // bottom
         triangle(vec3d(1f,0f,1f)), triangle(vec3d(0f,0f,1f)), 
triangle(vec3d(0f,0f,0f)),
         triangle(vec3d(1f,0f,1f)), triangle(vec3d(0f,0f,0f)), 
triangle(vec3d(1f,0f,0f))];