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OpenGL linbrary

I

Preparation

The OPenGL library utilizes the C language embedding feature. Therefore, it needs to be compiled first. Please follow the steps below to compile it.

sudo apt install freeglut3-dev

make prolog

Usage

?- use_module(opengl).

Example

main :-
    glut_init,
    glut_init_display_mode(glut_single),
    glut_init_window_size(400,300),
    glut_init_window_position(200,300),
    glut_create_window('GLUT test'),
    glut_init_display_mode(glut_rgba),
    gl_clear_color(1.0,1.0,1.0,1.0),
    glut_display_func(show),
    glut_main_loop.


show :-
    gl_clear(gl_color_buffer_bit),
    gl_color3d(1.0,0.0,0.0),
    gl_begin(gl_line_loop),
    gl_vertex2d(-0.5,-0.5),
    gl_vertex2d(-0.5,0.5),
    gl_vertex2d(0.5,0.5),
    gl_vertex2d(0.5,-0.5),
    gl_end,
    glut_solid_teapot(0.5),
    gl_flush.

Specification

  • glut_init: Initializes GLUT (OpenGL Utility Toolkit) for use with OpenGL applications.

  • glut_init_display_mode(glut_single): Sets the display mode to single-buffered.

  • glut_init_display_mode(glut_rgba): Sets the display mode to RGBA color format.

  • glut_init_window_size(Height, Width): Initializes the window size with the specified height and width.

  • glut_init_window_position(Height, Width): Initializes the window position with the specified height and width.

  • glut_create_window(X): Creates a window with the specified name.

  • gl_clear_color(X1, Y1, X2, Y2): Sets the clear color for the OpenGL window.

  • glut_display_func(X): Sets the display function callback for rendering.

  • glut_mouse_func(X): Sets the mouse function callback for mouse events.

  • glut_main_loop: Starts the GLUT main loop for handling events and rendering.

  • gl_clear(gl_color_buffer_bit): Clears the color buffer bit.

  • gl_color3d(R, G, B): Sets the color for drawing with the specified RGB values.

  • gl_begin1(X): Begins a drawing operation with the specified mode (e.g., GL_LINE_LOOP).

  • gl_begin(gl_line_loop): Begins drawing a line loop.

  • gl_begin(gl_points): Begins drawing points.

  • gl_begin(gl_lines): Begins drawing lines.

  • gl_begin(gl_line_strip): Begins drawing a line strip.

  • gl_begin(gl_triangles): Begins drawing triangles.

  • gl_begin(gl_quads): Begins drawing quads.

  • gl_begin(gl_triangle_strip): Begins drawing a triangle strip.

  • gl_begin(gl_quad_strip): Begins drawing a quad strip.

  • gl_begin(gl_triangle_fan): Begins drawing a triangle fan.

  • gl_begin(gl_polygon): Begins drawing a polygon.

  • gl_error(P, O): Handles errors in drawing operations.

  • gl_vertex2d(X, Y): Specifies a 2D vertex for drawing.

  • gl_vertex3d(X, Y, Z): Specifies a 3D vertex for drawing.

  • gl_vertex4d(X1, X2, X3, X4): Specifies a 4D vertex for drawing.

  • glut_solid_cube(X): Draws a solid cube with the specified size.

  • glut_solid_sphere(X, Y, Z): Draws a solid sphere with the specified radius and segments.

  • glut_solid_torus(X1, X2, X3, X4): Draws a solid torus with the specified inner and outer radii.

  • glut_solid_icosahedron: Draws a solid icosahedron.

  • glut_solid_octahedron: Draws a solid octahedron.

  • glut_solid_tetrahedron: Draws a solid tetrahedron.

  • glut_solid_dodecahedron: Draws a solid dodecahedron.

  • glut_solid_cone(X1, X2, X3, X4): Draws a solid cone with the specified base radius, height, and slices.

  • glut_solid_teapot(X): Draws a solid teapot with the specified size.

  • gl_end: Ends the current drawing operation.

  • gl_flush: Flushes the OpenGL commands to the graphics hardware.

  • gl_finish: Waits for all OpenGL commands to finish.

screen5.png