POLYGONAL_SURFACE_DISPLAY
Display a Polygonal Surface in MATLAB

POLYGONAL_SURFACE_DISPLAY is an executable MATLAB program which gets the names of the node and face files defining a polygonal surface, reads the information from the files, and displays the surface on the screen.

Related Data and Programs:

BEZIER_SURFACE_DISPLAY is a MATLAB program which reads two files defining a Bezier surface and displays it.

FEM_BASIS_T3_DISPLAY is a MATLAB program which displays a basis function associated with a linear triangle ("T3") mesh.

FEM_BASIS_T6_DISPLAY is a MATLAB program which reads a quadratic triangle mesh and displays any associated basis function.

POLYGONAL_SURFACE is a data directory which contains examples of polygonal surface files.

STLA_DISPLAY is a MATLAB program which reads an ASCII STL file and displays it.

TRI_MESH_DISPLAY is a MATLAB program which reads data defining a triangular mesh of a 3D surface and displays it.

TRIANGULATION_DISPLAY_OPEN_GL is an executable C++ program which reads files defining a triangulation and displays an image using Open GL.

Usage:

polygonal_surface_display ( 'node_file', 'face_file' )

reads the information in the polygonal surface node and face files and displays it on the screen.

Reference:

1. Edward Angel,
   Interactive Computer Graphics, a Top-Down Approach with OpenGL,
   Addison-Wesley, 2000,
   ISBN: 0-201-38597-X,
   LC: T385.A514.

Source Code:

• polygonal_surface_display.m the main program, which gets the names of the node and face files of a polygonal surface, reads the data, and displays it on the screen.
• dtable_data_read.m, reads a table from a double precision TABLE file.
• dtable_header_read.m, reads a table header from a double precision TABLE file.
• file_column_count.m, counts the number of columns in the first line of a file.
• file_row_count.m, counts the number of row records in a file.
• i4mat_transpose_print_some.m, prints some of the transpose of an I4MAT.
• itable_data_read.m, reads a table from an integer TABLE file.
• itable_header_read.m, reads a table header from an integer TABLE file.
• polygonal_surface_face_file_read.m reads the polygonal surface face file.
• polygonal_surface_node_file_read.m reads the polygonal surface node file.
• r8mat_transpose_print_some.m, prints some of the transpose of an R8MAT.
• s_escape_tex.m de-escapes from TeX escape sequences.
• s_len_trim.m returns the length of a string to the last nonblank.
• s_word_count.m, counts the number of words in a string.
• timestamp.m prints the current YMDHMS date as a time stamp.

Examples and Tests:

SPHERE_Q4 is a sphere, tiled with an 8 by 8 array of logically rectangular patches.

• sphere_q4_nodes.txt, the node file;
• sphere_q4_faces.txt, the face file;
• sphere_q4.png, a PNG image of the shape as displayed by POLYGONAL_SURFACE_DISPLAY.

SPHERE_T3 is a sphere, tiled with an 8 by 8 array of logically triangular patches.

• sphere_t3_nodes.txt, the node file;
• sphere_t3_faces.txt, the face file;
• sphere_t3.png, a PNG image of the shape as displayed by POLYGONAL_SURFACE_DISPLAY.

TETRA_T6 is a tetrahedron, tiled with 6-node triangles.

• tetra_t6_nodes.txt, the node file;
• tetra_t6_faces.txt, the face file;
• tetra_t6.png, a PNG image of the shape as displayed by POLYGONAL_SURFACE_DISPLAY.

You can go up one level to the MATLAB source codes.