renderstack::shapes::grid Class Reference

#include <polymesh.hpp>

Inherits renderstack::shapes::polymesh.

Public Member Functions
	grid (float cell_width, int positive_cell_count)

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Detailed Description

Definition at line 75 of file polymesh.hpp.

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Constructor & Destructor Documentation

renderstack::shapes::grid::grid	(	float	cell_width,
		int	positive_cell_count
	)

Definition at line 1811 of file polymesh.cpp.

{
    /*    2   9  11  13   3    0.. 3  corners              */ 
    /*                         2.. 7  min_x...max_x lines  */ 
    /*    6   .   .   .   7    8..13  min_z..,max_z lines  */ 
    /*                                                     */ 
    /*    4   .   x   .   5    positive_cell_count = 2     */ 
    /*                                                     */ 
    /*    2   .   .   .   3                                */ 
    /*                                                     */ 
    /*    0   8  10  12   1                                */ 

    float extreme = (float)(positive_cell_count) * cell_width;
    int index = 0;

    /*  Corner vertices  */ 
    {
        push_point(-extreme, -extreme, 0.0f); index++;
        push_point( extreme, -extreme, 0.0f); index++;
        push_point(-extreme,  extreme, 0.0f); index++;
        push_point( extreme,  extreme, 0.0f); index++;
    }

    /*  min x...max x vertices  */ 
    {
        /*  min z :  min_x...max_x  */ 
        {
            make_polygon(0, 1);
        }
        {
            int z;
            int range = (positive_cell_count - 1);

            for(z = -range; z <= range; ++z)
            {
                float   z_position = (float)(z) * cell_width;
                int     v0 = index++;
                int     v1 = index++;
                push_point(-extreme, z_position, 0.0f);
                push_point( extreme, z_position, 0.0f);
                make_polygon(v0, v1);
            }
        }

        /*  max z :  min_x...max_x  */ 
        {
            make_polygon(2, 3);
        }
    }

    /*  min z...max z vertices  */ 
    {
        /*  min x :  min_z...max_z  */ 
        {
            make_polygon(0, 2);
        }

        {
            int x;
            int range = (positive_cell_count - 1);

            for(x = -range; x <= range; ++x)
            {
                float   x_position = (float)(x) * cell_width;
                int     v0 = index++;
                int     v1 = index++;
                push_point(x_position, -extreme, 0.0f);
                push_point(x_position,  extreme, 0.0f);
                make_polygon(v0, v1);
            }
        }

        /*  max x :  min_z...max_z  */ 
        {
            make_polygon(1, 3);
        }
    }

    /*  Done  */ 
    build_mesh_from_geometry();
}

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The documentation for this class was generated from the following files:

• polymesh.hpp
• polymesh.cpp