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3 | 3 |
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4 | 4 | #include "euler.h"
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5 | 5 |
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6 |
| - /* |
7 |
| - * Spherical circle declarations |
8 |
| - */ |
| 6 | +/* |
| 7 | + * Spherical circle declarations |
| 8 | + */ |
9 | 9 |
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10 |
| - /* |
11 |
| - * Spherical circle data structure: center and radius. |
12 |
| - */ |
| 10 | +/* |
| 11 | + * Spherical circle data structure: center and radius. |
| 12 | + */ |
13 | 13 | typedef struct
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14 | 14 | {
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15 | 15 | SPoint center; /* the center of circle */
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16 | 16 | float8 radius; /* the circle radius in radians */
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17 | 17 | } SCIRCLE;
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18 | 18 |
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19 |
| - /* |
20 |
| - * Checks whether two circles are equal. |
21 |
| - */ |
| 19 | +/* |
| 20 | + * Checks whether two circles are equal. |
| 21 | + */ |
22 | 22 | bool scircle_eq(const SCIRCLE *c1, const SCIRCLE *c2);
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23 | 23 |
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24 |
| - /* |
25 |
| - * Checks whether circle contains point. |
26 |
| - */ |
| 24 | +/* |
| 25 | + * Checks whether circle contains point. |
| 26 | + */ |
27 | 27 | bool spoint_in_circle(const SPoint *p, const SCIRCLE *c);
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28 | 28 |
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29 |
| - /* |
30 |
| - * Transforms a circle using Euler transformation. |
31 |
| - */ |
32 |
| -SCIRCLE *euler_scircle_trans(SCIRCLE *out, const SCIRCLE *in, const SEuler *se); |
| 29 | +/* |
| 30 | + * Transforms a circle using Euler transformation. |
| 31 | + */ |
| 32 | +void euler_scircle_trans(SCIRCLE *out, const SCIRCLE *in, const SEuler *se); |
33 | 33 |
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34 |
| - /* |
35 |
| - * Takes the input and stores it as spherical circle. |
36 |
| - */ |
| 34 | +/* |
| 35 | + * Takes the input and stores it as spherical circle. |
| 36 | + */ |
37 | 37 | Datum spherecircle_in(PG_FUNCTION_ARGS);
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38 | 38 |
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39 |
| - /* |
40 |
| - * Checks whether two circles are equal. |
41 |
| - */ |
| 39 | +/* |
| 40 | + * Checks whether two circles are equal. |
| 41 | + */ |
42 | 42 | Datum spherecircle_equal(PG_FUNCTION_ARGS);
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43 | 43 |
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44 |
| - /* |
45 |
| - * Checks whether two circles are not equal. |
46 |
| - */ |
| 44 | +/* |
| 45 | + * Checks whether two circles are not equal. |
| 46 | + */ |
47 | 47 | Datum spherecircle_equal_neg(PG_FUNCTION_ARGS);
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48 | 48 |
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49 |
| - /* |
50 |
| - * Calculate the distance of two circles. If overlapping, this function |
51 |
| - * returns 0.0. |
52 |
| - */ |
| 49 | +/* |
| 50 | + * Calculate the distance of two circles. If overlapping, this function |
| 51 | + * returns 0.0. |
| 52 | + */ |
53 | 53 | Datum spherecircle_distance(PG_FUNCTION_ARGS);
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54 | 54 |
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55 |
| - /* |
56 |
| - * Calculate the distance of circle and point. If circle contains point, |
57 |
| - * this function returns 0.0. |
58 |
| - */ |
| 55 | +/* |
| 56 | + * Calculate the distance of circle and point. If circle contains point, |
| 57 | + * this function returns 0.0. |
| 58 | + */ |
59 | 59 | Datum spherecircle_point_distance(PG_FUNCTION_ARGS);
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60 | 60 |
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61 |
| - /* |
62 |
| - * Calculate the distance of point and circle. If circle contains point, |
63 |
| - * this function returns 0.0. |
64 |
| - */ |
| 61 | +/* |
| 62 | + * Calculate the distance of point and circle. If circle contains point, |
| 63 | + * this function returns 0.0. |
| 64 | + */ |
65 | 65 | Datum spherecircle_point_distance_com(PG_FUNCTION_ARGS);
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66 | 66 |
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67 |
| - /* |
68 |
| - * Checks whether circle contains point. |
69 |
| - */ |
| 67 | +/* |
| 68 | + * Checks whether circle contains point. |
| 69 | + */ |
70 | 70 | Datum spherepoint_in_circle(PG_FUNCTION_ARGS);
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71 | 71 |
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72 |
| - /* |
73 |
| - * Checks whether circle doesn't contain point. |
74 |
| - */ |
| 72 | +/* |
| 73 | + * Checks whether circle doesn't contain point. |
| 74 | + */ |
75 | 75 | Datum spherepoint_in_circle_neg(PG_FUNCTION_ARGS);
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76 | 76 |
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77 |
| - /* |
78 |
| - * Checks whether circle contains point. |
79 |
| - */ |
| 77 | +/* |
| 78 | + * Checks whether circle contains point. |
| 79 | + */ |
80 | 80 | Datum spherepoint_in_circle_com(PG_FUNCTION_ARGS);
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81 | 81 |
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82 |
| - /* |
83 |
| - * Checks whether circle doesn't contain point. |
84 |
| - */ |
| 82 | +/* |
| 83 | + * Checks whether circle doesn't contain point. |
| 84 | + */ |
85 | 85 | Datum spherepoint_in_circle_com_neg(PG_FUNCTION_ARGS);
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86 | 86 |
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87 |
| - /* |
88 |
| - * Checks whether circle is contained by other circle. |
89 |
| - */ |
| 87 | +/* |
| 88 | + * Checks whether circle is contained by other circle. |
| 89 | + */ |
90 | 90 | Datum spherecircle_in_circle(PG_FUNCTION_ARGS);
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91 | 91 |
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92 |
| - /* |
93 |
| - * Checks whether circle is not contained by other circle. |
94 |
| - */ |
| 92 | +/* |
| 93 | + * Checks whether circle is not contained by other circle. |
| 94 | + */ |
95 | 95 | Datum spherecircle_in_circle_neg(PG_FUNCTION_ARGS);
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96 | 96 |
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97 |
| - /* |
98 |
| - * Checks whether circle contains other circle. |
99 |
| - */ |
| 97 | +/* |
| 98 | + * Checks whether circle contains other circle. |
| 99 | + */ |
100 | 100 | Datum spherecircle_in_circle_com(PG_FUNCTION_ARGS);
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101 | 101 |
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102 |
| - /* |
103 |
| - * Checks whether circle does not contain other circle. |
104 |
| - */ |
| 102 | +/* |
| 103 | + * Checks whether circle does not contain other circle. |
| 104 | + */ |
105 | 105 | Datum spherecircle_in_circle_com_neg(PG_FUNCTION_ARGS);
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106 | 106 |
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107 |
| - /* |
108 |
| - * Checks whether two circle overlap. |
109 |
| - */ |
| 107 | +/* |
| 108 | + * Checks whether two circle overlap. |
| 109 | + */ |
110 | 110 | Datum spherecircle_overlap(PG_FUNCTION_ARGS);
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111 | 111 |
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112 |
| - /* |
113 |
| - * Checks whether two circle overlap. |
114 |
| - */ |
| 112 | +/* |
| 113 | + * Checks whether two circle overlap. |
| 114 | + */ |
115 | 115 | Datum spherecircle_overlap_neg(PG_FUNCTION_ARGS);
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116 | 116 |
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117 |
| - /* |
118 |
| - * Returns the center of circle. |
119 |
| - */ |
| 117 | +/* |
| 118 | + * Returns the center of circle. |
| 119 | + */ |
120 | 120 | Datum spherecircle_center(PG_FUNCTION_ARGS);
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121 | 121 |
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122 |
| - /* |
123 |
| - * Returns the radius of circle. |
124 |
| - */ |
| 122 | +/* |
| 123 | + * Returns the radius of circle. |
| 124 | + */ |
125 | 125 | Datum spherecircle_radius(PG_FUNCTION_ARGS);
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126 | 126 |
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127 |
| - /* |
128 |
| - * Converts a point to a circle. |
129 |
| - */ |
| 127 | +/* |
| 128 | + * Converts a point to a circle. |
| 129 | + */ |
130 | 130 | Datum spherepoint_to_circle(PG_FUNCTION_ARGS);
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131 | 131 |
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132 |
| - /* |
133 |
| - * Creates a circle from center and radius. |
134 |
| - */ |
| 132 | +/* |
| 133 | + * Creates a circle from center and radius. |
| 134 | + */ |
135 | 135 | Datum spherecircle_by_center(PG_FUNCTION_ARGS);
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136 | 136 |
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137 |
| - /* |
138 |
| - * Calculates the area of a circle in square radians. |
139 |
| - */ |
| 137 | +/* |
| 138 | + * Calculates the area of a circle in square radians. |
| 139 | + */ |
140 | 140 | Datum spherecircle_area(PG_FUNCTION_ARGS);
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141 | 141 |
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142 |
| - /* |
143 |
| - * Calculates the circumference of a circle in radians. |
144 |
| - */ |
| 142 | +/* |
| 143 | + * Calculates the circumference of a circle in radians. |
| 144 | + */ |
145 | 145 | Datum spherecircle_circ(PG_FUNCTION_ARGS);
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146 | 146 |
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147 |
| - /* |
148 |
| - * Transforms a circle using Euler transformation. |
149 |
| - */ |
| 147 | +/* |
| 148 | + * Transforms a circle using Euler transformation. |
| 149 | + */ |
150 | 150 | Datum spheretrans_circle(PG_FUNCTION_ARGS);
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151 | 151 |
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152 |
| - /* |
153 |
| - * Inverse transformation of a circle using Euler transformation. |
154 |
| - */ |
| 152 | +/* |
| 153 | + * Inverse transformation of a circle using Euler transformation. |
| 154 | + */ |
155 | 155 | Datum spheretrans_circle_inverse(PG_FUNCTION_ARGS);
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156 | 156 |
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157 | 157 | #endif
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