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00047 #include <GL/gl.h>
00048 #include <GL/glut.h>
00049
00050
00051
00052
00053 long patchdata[][16] =
00054 {
00055
00056 {102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11,
00057 12, 13, 14, 15},
00058
00059 {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
00060 24, 25, 26, 27},
00061 {24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36,
00062 37, 38, 39, 40},
00063
00064 {96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101,
00065 101, 0, 1, 2, 3,},
00066 {0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112,
00067 113, 114, 115, 116, 117},
00068
00069 {118, 118, 118, 118, 124, 122, 119, 121, 123, 126,
00070 125, 120, 40, 39, 38, 37},
00071
00072 {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
00073 53, 54, 55, 56},
00074 {53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
00075 28, 65, 66, 67},
00076
00077 {68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
00078 80, 81, 82, 83},
00079 {80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
00080 92, 93, 94, 95}
00081 };
00082
00083 float cpdata[][3] =
00084 {
00085 {0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7}, {0,
00086 -0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125},
00087 {0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125}, {1.4375,
00088 0, 2.53125}, {1.4375, -0.805, 2.53125}, {0.805, -1.4375,
00089 2.53125}, {0, -1.4375, 2.53125}, {1.5, 0, 2.4}, {1.5, -0.84,
00090 2.4}, {0.84, -1.5, 2.4}, {0, -1.5, 2.4}, {1.75, 0, 1.875},
00091 {1.75, -0.98, 1.875}, {0.98, -1.75, 1.875}, {0, -1.75,
00092 1.875}, {2, 0, 1.35}, {2, -1.12, 1.35}, {1.12, -2, 1.35},
00093 {0, -2, 1.35}, {2, 0, 0.9}, {2, -1.12, 0.9}, {1.12, -2,
00094 0.9}, {0, -2, 0.9}, {-2, 0, 0.9}, {2, 0, 0.45}, {2, -1.12,
00095 0.45}, {1.12, -2, 0.45}, {0, -2, 0.45}, {1.5, 0, 0.225},
00096 {1.5, -0.84, 0.225}, {0.84, -1.5, 0.225}, {0, -1.5, 0.225},
00097 {1.5, 0, 0.15}, {1.5, -0.84, 0.15}, {0.84, -1.5, 0.15}, {0,
00098 -1.5, 0.15}, {-1.6, 0, 2.025}, {-1.6, -0.3, 2.025}, {-1.5,
00099 -0.3, 2.25}, {-1.5, 0, 2.25}, {-2.3, 0, 2.025}, {-2.3, -0.3,
00100 2.025}, {-2.5, -0.3, 2.25}, {-2.5, 0, 2.25}, {-2.7, 0,
00101 2.025}, {-2.7, -0.3, 2.025}, {-3, -0.3, 2.25}, {-3, 0,
00102 2.25}, {-2.7, 0, 1.8}, {-2.7, -0.3, 1.8}, {-3, -0.3, 1.8},
00103 {-3, 0, 1.8}, {-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3,
00104 -0.3, 1.35}, {-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3,
00105 1.125}, {-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2,
00106 -0.3, 0.9}, {-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0,
00107 1.425}, {1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0,
00108 0.6}, {2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66,
00109 0.825}, {3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1},
00110 {2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4}, {2.7,
00111 -0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4}, {2.8, 0,
00112 2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375},
00113 {3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475},
00114 {3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4},
00115 {2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4}, {0, 0,
00116 3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15}, {0.45, -0.8,
00117 3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4}, {1.4,
00118 -0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4}, {0.4, 0,
00119 2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55}, {0, -0.4,
00120 2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55}, {0.728, -1.3,
00121 2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4}, {1.3, -0.728, 2.4},
00122 {0.728, -1.3, 2.4}, {0, -1.3, 2.4}, {0, 0, 0}, {1.425,
00123 -0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0}, {0.798, -1.425,
00124 0}, {0, -1.5, 0.075}, {0, -1.425, 0}, {1.5, -0.84, 0.075},
00125 {0.84, -1.5, 0.075}
00126 };
00127
00128 static float tex[2][2][2] =
00129 {
00130 { {0, 0},
00131 {1, 0}},
00132 { {0, 1},
00133 {1, 1}}
00134 };
00135
00136 static void
00137 teapot(GLint grid, GLdouble scale, GLenum type)
00138 {
00139 float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
00140 long i, j, k, l;
00141
00142 glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT);
00143 glEnable(GL_AUTO_NORMAL);
00144 glEnable(GL_NORMALIZE);
00145 glEnable(GL_MAP2_VERTEX_3);
00146 glEnable(GL_MAP2_TEXTURE_COORD_2);
00147 glPushMatrix();
00148 glRotatef(270.0, 1.0, 0.0, 0.0);
00149 glScalef(0.5 * scale, 0.5 * scale, 0.5 * scale);
00150 glTranslatef(0.0, 0.0, -1.5);
00151 for (i = 0; i < 10; i++) {
00152 for (j = 0; j < 4; j++) {
00153 for (k = 0; k < 4; k++) {
00154 for (l = 0; l < 3; l++) {
00155 p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
00156 q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
00157 if (l == 1)
00158 q[j][k][l] *= -1.0;
00159 if (i < 6) {
00160 r[j][k][l] =
00161 cpdata[patchdata[i][j * 4 + (3 - k)]][l];
00162 if (l == 0)
00163 r[j][k][l] *= -1.0;
00164 s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
00165 if (l == 0)
00166 s[j][k][l] *= -1.0;
00167 if (l == 1)
00168 s[j][k][l] *= -1.0;
00169 }
00170 }
00171 }
00172 }
00173 glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
00174 &tex[0][0][0]);
00175 glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
00176 &p[0][0][0]);
00177 glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
00178 glEvalMesh2(type, 0, grid, 0, grid);
00179 glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
00180 &q[0][0][0]);
00181 glEvalMesh2(type, 0, grid, 0, grid);
00182 if (i < 6) {
00183 glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
00184 &r[0][0][0]);
00185 glEvalMesh2(type, 0, grid, 0, grid);
00186 glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
00187 &s[0][0][0]);
00188 glEvalMesh2(type, 0, grid, 0, grid);
00189 }
00190 }
00191 glPopMatrix();
00192 glPopAttrib();
00193 }
00194
00195 void
00196 glutSolidTeapot(GLdouble scale)
00197 {
00198 teapot(14, scale, GL_FILL);
00199 }
00200
00201 void
00202 glutWireTeapot(GLdouble scale)
00203 {
00204 teapot(10, scale, GL_LINE);
00205 }
00206