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Diffstat (limited to 'hacks/glx/tangram_shapes.c')
| -rw-r--r-- | hacks/glx/tangram_shapes.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/hacks/glx/tangram_shapes.c b/hacks/glx/tangram_shapes.c new file mode 100644 index 0000000..267b187 --- /dev/null +++ b/hacks/glx/tangram_shapes.c @@ -0,0 +1,240 @@ +/* tangram, Copyright (c) 2005 Jeremy English <jhe@jeremyenglish.org> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation. No representations are made about the suitability of this + * software for any purpose. It is provided "as is" without express or + * implied warranty. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif /* HAVE_CONFIG_H */ + +#ifndef HAVE_JWXYZ +# include <GL/gl.h> +#endif + +#ifdef HAVE_ANDROID +#include <GLES/gl.h> +#endif + +#ifdef HAVE_JWZGLES +# include "jwzgles.h" +#endif /* HAVE_JWZGLES */ + +#include "tangram_shapes.h" + +#define small_scale ( 1 ) +#define large_scale ( 2 ) +#define medium_scale ( 1.414213562 ) + +#define alpha (0.05) + +static void +tri_45_90(int wire) +{ + GLfloat vertices[][3] = { + {0, alpha, 0}, + {0, alpha, 1}, + {1, alpha, 0}, + {0, -alpha, 0}, + {0, -alpha, 1}, + {1, -alpha, 0} + }; + + glBegin((wire) ? GL_LINE_LOOP : GL_TRIANGLES); + + glNormal3f(0, 1, 0); + glVertex3fv(vertices[0]); + glNormal3f(0, 1, 0); + glVertex3fv(vertices[2]); + glNormal3f(0, 1, 0); + glVertex3fv(vertices[1]); + + glNormal3f(0, -1, 0); + glVertex3fv(vertices[3]); + glNormal3f(0, -1, 0); + glVertex3fv(vertices[4]); + glNormal3f(0, -1, 0); + glVertex3fv(vertices[5]); + glEnd(); + + glBegin((wire) ? GL_LINE_LOOP : GL_QUADS); + glNormal3f(1, 0, 1); + glVertex3fv(vertices[2]); + glNormal3f(1, 0, 1); + glVertex3fv(vertices[5]); + glNormal3f(1, 0, 1); + glVertex3fv(vertices[4]); + glNormal3f(1, 0, 1); + glVertex3fv(vertices[1]); + + glNormal3f(-1, 0, 0); + glVertex3fv(vertices[0]); + glNormal3f(-1, 0, 0); + glVertex3fv(vertices[1]); + glNormal3f(-1, 0, 0); + glVertex3fv(vertices[4]); + glNormal3f(-1, 0, 0); + glVertex3fv(vertices[3]); + + glNormal3f(0, 0, -1); + glVertex3fv(vertices[0]); + glNormal3f(0, 0, -1); + glVertex3fv(vertices[3]); + glNormal3f(0, 0, -1); + glVertex3fv(vertices[5]); + glNormal3f(0, 0, -1); + glVertex3fv(vertices[2]); + glEnd(); +} + +static void +unit_cube(int wire) +{ + glBegin((wire) ? GL_LINE_LOOP : GL_QUADS); + + + glNormal3f(0.0f, 1.0f, 0.0f); + glVertex3f(0.0f, alpha, 0.0f); + glVertex3f(0.0f, alpha, 1.0f); + glVertex3f(1.0f, alpha, 1.0f); + glVertex3f(1.0f, alpha, 0.0f); + + glNormal3f(0.0f, 0.0f, 1.0f); + glVertex3f(0.0f, -alpha, 1.0f); + glVertex3f(1.0f, -alpha, 1.0f); + glVertex3f(1.0f, alpha, 1.0f); + glVertex3f(0.0f, alpha, 1.0f); + + glNormal3f(0.0f, 0.0f, -1.0f); + glVertex3f(0.0f, -alpha, 0.0f); + glVertex3f(0.0f, alpha, 0.0f); + glVertex3f(1.0f, alpha, 0.0f); + glVertex3f(1.0f, -alpha, 0.0f); + + glNormal3f(1.0f, 0.0f, 0.0f); + glVertex3f(1.0f, -alpha, 0.0f); + glVertex3f(1.0f, alpha, 0.0f); + glVertex3f(1.0f, alpha, 1.0f); + glVertex3f(1.0f, -alpha, 1.0f); + + glNormal3f(-1.0f, 0.0f, 0.0f); + glVertex3f(0.0f, -alpha, 0.0f); + glVertex3f(0.0f, -alpha, 1.0f); + glVertex3f(0.0f, alpha, 1.0f); + glVertex3f(0.0f, alpha, 0.0f); + + glNormal3f(0.0f, -1.0f, 0.0f); + glVertex3f(0.0f, -alpha, 0.0f); + glVertex3f(1.0f, -alpha, 0.0f); + glVertex3f(1.0f, -alpha, 1.0f); + glVertex3f(0.0f, -alpha, 1.0f); + + glEnd(); +} + +static void +unit_rhomboid(int wire) +{ + glBegin((wire) ? GL_LINE_LOOP : GL_QUADS); + + glNormal3f(0.0f, 1.0f, 0.0f); + glVertex3f(0, alpha, 0); + glVertex3f(1, alpha, 1); + glVertex3f(1, alpha, 2); + glVertex3f(0, alpha, 1); + + glNormal3f(0.0f, -1.0f, 0.0f); + glVertex3f(0, -alpha, 0); + glVertex3f(0, -alpha, 1); + glVertex3f(1, -alpha, 2); + glVertex3f(1, -alpha, 1); + + glNormal3f(-1.0f, 0.0f, 0.0f); + glVertex3f(0, alpha, 0); + glVertex3f(0, alpha, 1); + glVertex3f(0, -alpha, 1); + glVertex3f(0, -alpha, 0); + + + glNormal3f(0.0f, 0.0f, 1.0f); + glVertex3f(0, alpha, 1); + glVertex3f(1, alpha, 2); + glVertex3f(1, -alpha, 2); + glVertex3f(0, -alpha, 1); + + glNormal3f(1.0f, 0.0f, 0.0f); + glVertex3f(1, alpha, 1); + glVertex3f(1, -alpha, 1); + glVertex3f(1, -alpha, 2); + glVertex3f(1, alpha, 2); + + glNormal3f(0.0f, 0.0f, 1.0f); + glVertex3f(0, alpha, 0); + glVertex3f(0, -alpha, 0); + glVertex3f(1, -alpha, 1); + glVertex3f(1, alpha, 1); + + glEnd(); +} + +/* All of the pieces have the same thickness so all of the Y values are the same */ + +GLuint +tangram_get_sm_tri_dl(int wire) +{ + GLuint triangle = glGenLists(1); + glNewList(triangle, GL_COMPILE); + glScalef(small_scale, small_scale, small_scale); + tri_45_90(wire); + glEndList(); + return triangle; +} + +GLuint +tangram_get_lg_tri_dl(int wire) +{ + GLuint triangle = glGenLists(1); + glNewList(triangle, GL_COMPILE); + glScalef(large_scale, small_scale, large_scale); + tri_45_90(wire); + glEndList(); + return triangle; +} + +GLuint +tangram_get_md_tri_dl(int wire) +{ + GLuint triangle = glGenLists(1); + glNewList(triangle, GL_COMPILE); + glScalef(medium_scale, small_scale, medium_scale); + tri_45_90(wire); + glEndList(); + return triangle; +} + +GLuint +tangram_get_square_dl(int wire) +{ + GLuint square = glGenLists(1); + glNewList(square, GL_COMPILE); + glScalef(small_scale, small_scale, small_scale); + unit_cube(wire); + glEndList(); + return square; +} + +GLuint +tangram_get_rhomboid_dl(int wire) +{ + GLuint rhomboid = glGenLists(1); + glNewList(rhomboid, GL_COMPILE); + glScalef(small_scale, small_scale, small_scale); + unit_rhomboid(wire); + glEndList(); + return rhomboid; +} |